BREEDING AND GENETICS
|
|
- Ann Garrison
- 6 years ago
- Views:
Transcription
1 BREEDING AND GENETICS Behavior, Production, and Weil-Being of the Laying Hen. 2. Individual Variation and Relationships of Behavior to Production and Physical Condition A. B. WEBSTER 1 and J. F. HURNK Department of Animal and Poultry Science, University of Guelph, Guelph, Ontario, Canada NIG 2W1 (Received for publication February 26, 199) ABSTRACT Variation of behavior among hens and the relationships of behavior to measures of production and physical condition were investigated. The birds were 384 pullets from the mating of two stocks of males, obtained from a commercial breeder, to females from a third flock. The birds were housed as pairs in laying cages at 22 and 2 wk of age (Hatches 1 and 2, respectively). The laying phase was divided into 28-day periods. In Periods 1,3,5,7,9, and 11, samples of hens were video recorded for 8 h. In Period 13, direct visual observations were made of the behavior of individually identified hens. Eleven production-related variables were recorded throughout the laying phase. Feather scores were assessed in Periods 3,6,9, and 12. Body weight, lesions to the feet, and claw length were recorded in Periods 6 and 13. Spearman rank correlations were calculated between video-recorded behavioral variables and measures of production and physical condition. The data from direct visual observations were used for heritability estimates of behavioral traits. Eating and standing were positively correlated with egg production, whereas sitting and, for hens derived from male parental Stock 1, resting were negatively correlated with production. Inactivity also coincided with poorer plumage condition and higher body weight. For the offspring of male parental Stock 2, behavioral actions frequently performed in stereotyped manner, e.g., cage pecking and toe pecking, were positively associated with egg production. No significant additive genetic variation for behavior was evident among sires; however, for dams, fairly large heritability estimates occurred for a number of behavioral states. The apparent absence of additive genetic variability among sires for behavior may have been due to genetic fixation at gene loci which control behavior in the stocks acquired from the commercial breeder. (Key words: laying hen, heritability, behavior, egg production, physical condition) INTRODUCTION The ability of an animal to cope with an intensive production environment is influenced greatly by its behavior, as behavioral actions are essential to the modification of circumstances and exploitation of resources. If an animal's responses are not appropriate, its needs may go unsatisfied or it may cause harm to itself or other animals. On a cognitive level, failure of the consequences of actions to meet with expectations appears to result in suffering (Toates, 1987; Wiepkema, 1987). Insofar as production and well-being both require a constructive interaction between animal and environment, animals should be behaviorally adapted to the housing provided. One could 'Present address: Atlantic Poultry Research Institute, Nova Scoria Agricultural College, P.O. Box 55, Truro, NS, Canada B2N 5E Poultry Science 7: make environmental adjustments to accommodate the behavioral propensities of an animal; however, there is a limit to how much an environment can be modified without seriously compromising the economic efficiency of a production unit. Alternatively, one could select for behavioral characteristics that promote adaptation to intensive housing environments. The consensus in the literature is that species have been modified during domestication such that domestic animals are better able to cope with production environments than their wild progenitors (Hurnik, 198; Beilharz, 1982; Craig, 1982). Siegel (1979, 1989) has reviewed the subject of behavioral genetics in chickens. Despite domestication, it is not apparent that any breed or strain of chicken is ideally suited to intensive housing. In various genetic stocks, social dominance ability (Craig et al., 1965), color preference (Hurnik et al., 1977), mating behavior (Dunnington and Siegel, 1983), open-field activity (Faure, 1981; Faure and Folmer, 1975), and prelaying Downloaded from at Penn State University (Paterno Lib) on February 18, 216
2 422 WEBSTER AND HURNIK behavior (Mills et ah, 1985) have been altered through selection. Moreover, selection of a behavioral trait can, in some instances, influence a production-related variable, e.g., social dominance ability and age at sexual maturity (Craig and Toth, 1969). Selection of behavior to improve production or welfare, therefore, might be feasible provided suitable behavioral traits can be found upon which to exert selection pressure. Some relationships of behavior to production and well-being have been noted in the literature; for instance, hysteria has a negative impact on production and wellbeing (Hansen, 1976), and fearfulness generally has a negative association with feathering and egg production (Craig et ah, 1983, 1984; Hemsworth and Barnett, 1989). Even so, the contributions to production or well-being of many of the most prominant behavioral actions of chickens in intensive husbandry environments are not well understood, nor are their genetic variabilities well investigated. The present study focused on the relationships of behavioral actions constituting the ethogram of hens in battery cages to measures of production and physical condition. Heritabilities of these actions were estimated. The data are from a larger study of the effects of environment and genetic stock on the productivity and well-being of laying hens (Webster, 199). MATERIALS AND METHODS Pullets were derived from the mating of two White Leghorn-type stocks of males, acquired from Shaver Poultry Breeding Farms, Cambridge, Ontario, Canada, to females from a flock kept at the University of Guelph. The birds were housed at 22 and 2 wk of age (Hatches 1 and 2, respectively) in two adjacent three-tiered, semi-stairstep batteries of cages. Each cage was 45 cm wide, 32.5 cm deep, and 37.5 cm high. There were 13 and 12 males, respectively, from the two commercial stocks. Each male was bred to two females (different females for each male). The and designate the pullets derived from male parental Stocks 1 and 2, respectively. Rearing and management in dam family groups within hatches have been described by Webster and Humik (1989). Eight pullets were randomly selected from each dam family for housing in the laying batteries, and the assignment of these individuals to cages was randomized. The pullets were housed, two per cage, within blocks of four cages in each cage battery, being randomly assigned to two adjacent cages in a block and to the other two adjacent cages. A total of 384 pullets was housed in 192 cages. The batteries were in a closed, negative pressure, fan-ventilated room. Photoperiod was 14 h light: 1 h dark. Feed and water were provided ad libitum. The laying phase was divided into day periods. On the first 4 days of Periods 1, 3, 5, 7, 9, and 11, video recordings were made of hens in 8 cages per day. For each videotape, beginning at 9 h, 6 records of the behavior of each hen were obtained at evenly spaced intervals covering 8 h. The data were pooled for hens within cages. A series of direct visual observations was conducted in Period 13 to gain information on individual hens. Eight cages per day were observed; the study comprised 24 days of observation over a 28-day period. The behavior of each hen in each cage was observed continuously for 2 min between 83 h and 12 h. To aid individual identification, a black felt marker was used the day before a given cage was to be observed to mark one cagemate on the back of the neck and the throat and the other on the sides of the neck. Hens paid no noticeable attention to these markings during the period of observation. Occurrences and durations of all behavioral actions were recorded directly onto microcomputer disk. Eleven variables related to production were recorded throughout the laying phase. Feather scores were assessed in Periods 3, 6, 9, and 12. Body weights, lesions to the feet, and length of the claws of the center front toe and rear toe of the right foot were recorded in Periods 6 and 13. Housing, management, experimental factors, procedures of observation, and dependent variables in the laying phase have been described in detail in Webster and Hurnik (199a,b). Spearman rank correlations were calculated between video recorded behavioral variables and the measures of production and physical condition. For the direct visual observations, a nested analysis of variance was used to test the significance of the sire and dam components of variance. The model equation was as follows: Yijkim = M. + C i + Rj + G fc + s(g)ki + d(s) klm + J^Oijkim-O ) + P2(Bijklm-B ) + eijklm where Y^um = an observation of an individual hen; \i = the grand mean; Q = the cage type Downloaded from at Penn State University (Paterno Lib) on February 18, 216
3 CORRELATION OF HEN BEHAVIOR AND PRODUCTION 423 effect (i = roost, conventional); Rj = the relationship of cage mates effect (j = siblings, nonsiblings); G^ = the male parental genetic stock effect (k = 1, 2); s(g)u = the sire-withinmale-parental stock effect (k = 1, 1 = 1, 2,..., 13) (k = 2, 1 = 1, 2 12); dcsw - the dam-within-sire effect (m = 1,2); P^OjjHnj O ) = the effect of order of observation within a day as a covariate; p^bytim - B ) = the effect of cage block as a covariate; and ejjkim = the error for an individual hen. Variation among days of observation was not sufficiently great to justify retaining it as an effect in the model. Before analysis, the proportions of time spent in the different behavioral states were transformed into arc sine square root values, and variables recorded as occurrences were transformed using the formula, (X + l)- 5 (Snedecor and Cochran, 198). Tests of the significance of sire components of variance were carried out separately for the two male parental stocks. RESULTS A large number of significant correlations existed between behavioral variables and measures of production and physical condition. Eating and standing were positively correlated with hen-housed egg production and egg mass, and eating also had a positive association with feed consumption (Table 1). In, cage pecking, toe pecking, bobbing, and physical displacement were positively correlated with measures of egg production. Sitting and resting (MPSl) were negatively correlated with egg production. Greater performances of head down and walking behavior (primarily MPSl) were associated with lower feather score (better feather coverage) and lower body weight and weight gain (Table 2). Increased levels of resting, immobility (still, MPSl), and sitting coincided with poorer plumage condition and higher body weight. Significant correlations between behavior in laying cages and foot lesions or claw length were so few as to be attributable to chance. There was no significant variation of behavior for sires within MPSl (Table 3). Li, only state of stillness had a significant sire component of variance. Li contrast, significant variability due to dams existed for a number of behavioral states. Heritability estimates for sires for the most part were small or zero. For dams, however, many of the behavioral variables had fairly large heritability estimates. DISCUSSION The most striking result was that behavioral activation (i.e., the tendency to manifest higher levels of activity rather than lower) was associated with higher egg production in battery cages. A similar phenomenon was apparent for intrastock relationships of behavior to production between the rearing and laying phases and for inter-stock comparisons (Webster, 199; Webster and Humik, 199b). Considering that various forms of activity in chickens are more energetically costly than inactivity (van Kampen, 1976a,b; MacLeod and Jewitt, 1985), one might have expected behavioral activation to draw energy away from egg production, leading to negative, rather than positive, associations between the two. It is not known if higher rate of production stimulated higher levels of activity, or if greater vigor led to higher production. In the present study, behavior indicative of higher activity tended to correspond to better feed conversion measures. However, Morrison and Leeson (1978) and Braastad and Katie (1989) reported that hens selected for feed efficiency were less active than feed-inefficient hens. El-Attar et al. (1983) noted that pullets that had a lower frequency of resting had better feed conversion. That eating was positively associated with production is not unexpected, and might appear not to be related to behavioral activation at all. However, hens spent an average of 2% of their time performing the behavior defined as eating (Webster and Hurnik, 199a), which is much more than actually necessary to consume an adequate amount of feed. Given the relatively low stimulus complexity of a battery cage environment, the feed trough is a major attraction and time spent manipulating feed probably reflects the degree of behavioral activation experienced by a hen. The relationship between eating and production in the present study arose from measures pooled for hens within cages, and so appears to be more general than that found by Cunningham and van Tienhoven (1984) in which hens of low social rank ate less frequently and had lower production in situations of feed restriction. Cage pecking, toe pecking, and bobbing often were performed in a stereotyped manner. Downloaded from at Penn State University (Paterno Lib) on February 18, 216
4 424 WEBSTER AND HURNK Because performance of stereotypic behavior may be a means of controlling sensory input and modifying motivational state in suboptimal environments (Broom, 1983), stereotypic behavior in caged hens could be a reflection of behavioral activation. The relationships of the above actions to egg production and feed conversion in, therefore, may be further indications of a link between behavioral activation and production. The connection between stereotypy and production evidently differs between stocks because the two sets of variables were much less interrelated in. It was not foreseen that walking would have a positive association and that measures of inactivity (resting, still, sitting) would have negative associations with plumage condition. Inactivity, particularly when recumbent, would expose a hen to feather damage caused by the claws of cage mates. Poorer physical condition Behavior 2 Hflik Eating Preening Hdwn Resting Peck Still Walking Bobbing Displ Standing Sitting Tpk Step TABLE 1. Spearman correlations between behavior and production-related variables Stock Hhprod.25*.33** -.27*.14 Eggwt.29* * * * *.47****,34*.19.27*.34**.25* -.35** -.25*.1.34** -.33* -.46***.34**.46*** Eggmass Defrm.12.28* -.38** *.18.3* *.22.28* *.3.3**.2.3* * Production 3,4 Cxcol.28* *.9.23* -.9 Cxshk ** Soft -.32** -.26* *.9.25* Feed 21*.43**** -.25*.1.29* A* ** Fdconv.36** * ** 'Data are presented only when the coefficient for at least one of the stocks differed significantly from. Fdoz -.26*.9 29* * -.24* * * ** * Abbreviations for behavioral variables: Hflik = head flicking; Hdwn = head down; Peck = cage pecking; Displ = physical displacement; Tpk = toe pecking; Step = stepping on cagemate. Production data were from period closest to that in which behavior was observed, except egg cracks, which were averaged over all periods. Abbreviations for production variables: Hhprod = hen-housed production; Eggwt = egg weight; Eggmass = egg mass production; Defrm = egg shell deformation; Cxcol = cracks at collection; Cxshk = cracks after shaking; Soft = softshelled eggs; Feed = feed consumption; Fdconv = feed conversion; Fdoz = feed per dozen eggs. *P<5. **P<.1. ***P<1. ****P<.1. Downloaded from at Penn State University (Paterno Lib) on February 18, 216
5 CORRELATION OF HEN BEHAVIOR AND PRODUCTION 425 could have led to inactivity and plumage deterioration, but this was not investigated. The relationships of the above variables to body weight are consistent with die relative energy demands of higher versus lower activity. Head down behavior had a greater correspondence to behavioral activation man to inactivity (Webster and Hurnik, 199a), so it is not unreasonable that its relationships to feathering and body weight were similar to those of walking. The variability of behavior that was manifest in the correlations cannot, to any great extent, be attributed to sires within male parental stocks. Little variation due to sires was found during the rearing phase as well (Webster and Hurnik, 1987,1989), the greatest Behavior Head flicking Eating Preening Head down Resting Still Drinking Walking Bobbing Physical displacement Standing Sitting Toe pecking amount being apparent during a study of openfield behavior at 17 wk of age (Webster and Hurnik, 1989). The dam parental stock had sizable heritability estimates for a number of behavioral variables related to measures of production or physical condition. They are eating, standing, cage pecking, and physical displacement, which were positively associated with egg production. Resting and, to a lesser extent, sitting were negatively associated with egg production and plumage condition and positively associated with body weight. Walking and head down behavior were positively associated with feather condition and negatively associated with body weight. Furthermore, feather pecking, measures of aggression (pecking cage- TABLE 2. Spearman correlations between behavior and measures of physical condition^ Stock Feather score.14.29* -.31* -.24*.31**.33** 45**** * * * Physical condition 2 Body weight -.31** *** -.5****.4***.35**.32**.33** -.29* * *** -.35**.39***.36* *** Weight gain.11.31** -.32** ** -.34** -.26* *.1 -.3* * *Data are presented only when the coefficient for at least one of the stocks differed significantly from. J Physical condition data were taken from the period closest to that in which behavior was observed. *P<.5. **P<1. ***P<1. ***P<.1. Downloaded from at Penn State University (Paterno Lib) on February 18, 216
6 426 WEBSTER AND HURNIK mate, pecking neighbor) and cage climbing (which appeared to be attempts to escape the cage) also had fairly large heritability estimates. Although it is not unreasonable to suspect that additive genetic variability exists in the female parental stock for many behavioral states, nonadditive genetic effects and effects of common environment also contribute to the dam component of variance (Falconer, 1981). The heritabilities for eating in and in the female parental stock, and for resting in the female parental stock, are comparable with those noted by Hurnik (1978). The heritability estimates in the present study for drinking and standing were less than those of Hurnik (1978). Prelaying behavior in the forms of pacing and sitting has been found to have a genetic basis (Mills et al., 1985). Bobbing in the present study occurred most frequently in the hour before oviposition (Webster and Hurnik, 199a), but there was no evidence of significant genetic variability for either sires or dams. If the relationship of behavioral activation to production and physical condition is confirmed by further research, it should be possible to develop genetic stocks with behavioral propensities better suited to the cage environment, at least with regard to the traits measured. Faure (198, 1981) has selected lines of chickens to have different levels of activity in a standardized environment. The female parental stock in the present study may have had sufficient genetic variability for selection of a number of actions related to behavioral activation. The apparent lack of genetic variability for sires within each male parental stock might have been due to genetic fixation at gene loci controlling the expression of behavior in the stocks acquired from the commercial breeder. However, the investigation of genetic variability in the present study involved a relatively small number of sires and a single set of observations of the behavior of each hen. In future, use of larger numbers of sires and TABLE 3. Components of variance and heritability estimates for behavior recorded by direct visual observation Behavior Head flicking Eating Preening Head down Resting Still Drinking Walking Bobbing Toe pecking Feather pecking Standing Sitting Cage pecking Pecking cagemate Stepping on cagemate Physical displacement Climbing cage Pecking neighbor U2 x Component of variance 1,2 Sires * EPS Dams * ** 3.35** ** * 7.65* ** 39.59** ± ±.2.5 ± ±.2 21 ± ±.19.7 ± ±.2.1 ±.33 Heritability ± SE 3-4 Sires.24 ±.67 ± ±.2.12 ±.25.6 ±.18 FPS Dams.35 ± 26.4 ± ± ±.3.47 ± ± ± ± ± ±.3.42 ± ± ±.3.53 ±.48 2 = male parental Stock 1, df = 12; = male parental Stock 2, df = 11; FPS = female parental stock, df = Heritabilities were calculated from untransformed data. Heritability was considered zero when the sire or dam component of variance was negative. *P<.5. **P<1. Downloaded from at Penn State University (Paterno Lib) on February 18, 216
7 CORRELATION OF HEN BEHAVIOR AND PRODUCTION 427 repetition of measurement to improve the precision of behavioral assessment might help expose genetic variability for behavior in commercial stocks of chicken. ACKNOWLEDGMENTS Appreciation is expressed to the staff of the Arkell Poultry Research Station, University of Guelph for their cooperation and help and to the Ontario Ministry of Agriculture and Food for provision of facilities. Financial support for the research came from Natural Sciences and Engineering Research Council of Canada Grant Number A6784. REFERENCES Braastad, B. O., and J. Katie, Behavioral differences between laying hen populations selected for high and low efficiency of food utilisation. Br. Poult. Sci. 3: Beilharz, R. G., Genetic adaptation in relation to animal welfare. Int. J. Study Anim. Prob. 3: Broom, D. M, Stereotypies as animal welfare indicators. Pages in: Indicators Relevant to Farm Animal Welfare. D. Smidt, ed. Martinus Nijhoff Publishers, Boston, MA. Craig, J. V., Behavioral and genetic adaptation of laying hens to high-density environments. Bioscience 32: Craig, J. V., T. P. Craig, and A. D. Dayton, Fearful behavior by caged hens of two genetic stocks. Appl. Anim. Ethol. 1: Craig, J. V., S. K. Kujiyat, and A. D. Dayton, Tonic immobility responses of White Leghorn hens affected by induction techniques and genetic stock differences. Poultry Sci. 63:1-1. Craig, J. V., L. L. Ortman, and A. M. Guhl, Genetic selection for social dominance ability in chickens. Anim. Behav. 13: Craig, J. V., and A. Toth, Productivity of pullets influenced by genetic selection of social dominance ability and by stability of flock membership. Poultry Sci. 48: Cunningham, D. L., and A. van Tienhoven, The effects of management program and social rank on behavior and productivity of White Leghorn layers in cages. Poultry Sci. 63:25-3. Dunnington, E. A., and P. B. Siegel, Mating frequency in male chickens: Long-term selection. Theor. Appl. Genet. 64: El-Attar, M., P. Merat, and A. Bordas, Comportement de poulettes normales et naines (dw) en openfield et cages individuelles, en correlation avec la croissance et l'efficacite alimentaire. Arch. Geflugelkd. 47:9-95. Falconer, D. S., Introduction to Quantitative Genetics. 2nd ed. Longman Group Ltd., Essex, England. Faure, J. M., 198. To adapt the environment to the bird or the bird to the environment? Pages in: The Laying Hen and its Environment. R. Moss, ed. Martinus Nijhoff Publishers, The Hague, The Netherlands; Boston, MA; and London, England. Faure, J. M, Bidirectional selection for open-field activity in young chicks. Behav. Genet. 11: Faure, J. M., and J. C. Folmer, Etude genetique de l'activite precoce en open-field du jeune poussin. Ann. Genet. Sel. Anim. 7: Hansen, R. S., Nervousness and hysteria of mature female chickens. Poultry Sci. 55: Hemsworth, P. H., and J. L. Bamett, Relationships between fear of humans, productivity and cage position of laying hens. Br. Poult. Sci. 3: Hurnik, J. F., Feed conversion and feeding behaviour in laying hens. Pages 7-85 in: Proc. 27th National Breeder's Roundtable, Kansas City, Missouri. Published by Poultry Breeders of America, Arlington, VA. Hurnik, J. F., 198. Animal welfare and modern agriculture. Anim. Regul. Stud. 2: Hurnik, J. F., F. N. Jerome, and I. McMillan, Hereditary effects of natural colour preference in domestic chickens. Biol. Behav. 2: MacLeod, M. G., and T. R. Jewitt, The energy cost of some behavior patterns in laying domestic fowl: simultaneous calorimetric, Doppler-radar and visual observations. Proc. Nutr. Soc. 44:34A. (Abstr.) Mills, A. D., D.G.M. Wood-Gush, and B. O. Hughes, Genetic analysis of strain differences in prelaying behaviour in battery cages. Br. Poult. Sci. 26: Morrison, W. D., and S. Leeson, Relationship of feed efficiency to carcass composition and metabolic rate in laying birds. Poultry Sci. 57: Siegel, P. B., Behaviour genetics in chickens: A review. World's Poult. Sci. J. 35:9-19. Siegel, P. B., The genetic-behaviour interface and well-being of poultry. Br. Poult Sci. 3:3-13. Snedecor, G. W., and W. G. Cochran, 198. Statistical Methods. 7th ed. Iowa State Univ. Press, Ames, IA. Toates, F., The relevance of models of motivation and learning to animal welfare. Pages in: Biology of Stress in Farm Animals: An Integrative Approach. P. R. Wiepkema and P.W.M Adrichem, ed. Martinus Nijhoff Publishers, Boston, MA. van Kampen, M., 1976a. Activity and energy expenditure in laying hens. 2. The energy cost of exercise. J. Agric. Sci., Camb. 87:81-M. van Kampen, M., 1976b. Activity and energy expenditure in laying hens. 3. The energy cost of eating and posture. J. Agric. Sci., Camb. 87:85-88, Webster, A. B., 199. A study of behavior, production and well-being in the White Leghorn-type chicken. PhJD. dissertation, Univ. Guelph, Guelph, Ontario, Canada. Webster, A. B., and J. F. Hurnik, Heritability of the peep vocalization in White Leghorn-type chicks. Appl. Anim. Behav. Sci. 19: Webster, A. B., and J. F. Hurnik, Genetic assessment of the behavior of White Leghorn type pullets in an open field. Poultry Sci. 68: Webster, A. B., and J. F. Hurnik, 199a. An ethogram of White Leghorn-type hens in battery cages. Can. J. Downloaded from at Penn State University (Paterno Lib) on February 18, 216
8 428 WEBSTER AND HURNIK Anim. Sci. 7: Webster, A. B and J. F. Humik, 199b. Behavior, production and well-being of the laying hen. I. Effects of movable roosts, relationship of cage mates and genetic stock. Poultry Sci. 69: Wiepkema, P. R., Behavioral aspects of stress. Pages in: Biology of Stress in Farm Animals: An Integrative Approach. P. R. Wiepkema and P.W.M. Adrichem, ed. Martinus Nijhoff Publishers, Boston, MA. Downloaded from at Penn State University (Paterno Lib) on February 18, 216
Modification of Laying Hen Cages to Improve Behavior
Modification of Laying Hen Cages to Improve Behavior MICHAEL C. APPLEBY1 Institute of Ecology and Resource Management, University of Edinburgh, West Mains Road, Edinburgh EH9 3JG, United Kingdom ABSTRACT
More informationECONOMIC studies have shown definite
The Inheritance of Egg Shell Color W. L. BLOW, C. H. BOSTIAN AND E.^W. GLAZENER North Carolina State College, Raleigh, N. C. ECONOMIC studies have shown definite consumer preference based on egg shell
More informationEDUCATION AND PRODUCTION. Layer Performance of Four Strains of Leghorn Pullets Subjected to Various Rearing Programs
EDUCATION AND PRODUCTION Layer Performance of Four Strains of Leghorn Pullets Subjected to Various Rearing Programs S. LEESON, L. CASTON, and J. D. SUMMERS Department of Animal and Poultry Science, University
More informationComponents of Feed Efficiency in Broiler Breeding Stock: Is Improved Feed Conversion Associated with Increased Docility and Lethargy in Broilers?
Components of Feed Efficiency in Broiler Breeding Stock: Is Improved Feed Conversion Associated with Increased Docility and Lethargy in Broilers? 1,2 D. O. Skinner-Noble,*,3 R. B. Jones, and R. G. Teeter*,4
More informationSelection for Egg Mass in the Domestic Fowl. 1. Response to Selection
Selection for Egg Mass in the Domestic Fowl. 1. Response to Selection H. L. MARKS US Department of Agriculture, Science & Education Administration, Agricultural Research, uthern Regional Poultry Breeding
More informationTHE INTERACTIONS BETWEEN GENOTYPES AND HOUSING ENVIRONMENTS IN THE DOMESTIC HEN
THE INTERACTIONS BETWEEN GENOTYPES AND HOUSING ENVIRONMENTS IN THE DOMESTIC HEN B Y G. M C B RIDE * Summary A study was made of the egg production and egg weight of a flock of Australorp pullets in which
More informationEffects of a Pre-Molt Calcium and Low-Energy Molt Program on Laying Hen Behavior During and Post-Molt
Animal Industry Report AS 655 ASL R2446 2009 Effects of a Pre-Molt Calcium and Low-Energy Molt Program on Laying Hen Behavior During and Post-Molt Emily R. Dickey Anna K. Johnson George Brant Rob Fitzgerald
More informationImproving Animal Well-Being Through Genetic Selection 1,2
Improving Animal Well-Being Through Genetic Selection 1,2 W. M. MUIR3 and J. V. CRAIG Department of Animal Sciences, Purdue University, West Lafayette, Indiana 47907 ABSTRACT This paper reviews the possibilities
More informationEffect of Nest Design, Passages, and Hybrid on Use of Nest and Production Performance of Layers in Furnished Cages
Effect of Nest Design, Passages, and Hybrid on Use of Nest and Production Performance of Layers in Furnished Cages H. Wall, 1 R. Tauson, and K. Elwinger Department of Animal Nutrition and Management, Swedish
More informationAnalysis of the economics of poultry egg production in Khartoum State, Sudan
International Scholars Journals African Journal of Poultry Farming ISSN 2375-0863 Vol. 3 (5), pp. 097-102, November, 2015. Available online at www.internationalscholarsjournals.org International Scholars
More informationPerch Arrangements in Small-Group Furnished Cages for Laying Hens
2007 Poultry Science Association, Inc. Perch Arrangements in Small-Group Furnished Cages for Laying Hens H. Wall 1 and R. Tauson Department of Animal Nutrition and Management, Swedish University of Agricultural
More informationThe welfare of laying hens
The welfare of laying hens I.C. DE JONG* and H.J. BLOKHUIS Animal Sciences Group of Wageningen UR, Division of Animal Production, PO Box 65, 8200 AB Lelystad, The Netherlands. *Corresponding author: ingrid.dejong@wur.nl
More informationUrges, Needs, Preferences, Priorities Coming to Terms with the Welfare of Hens
Urges, Needs, Preferences, Priorities Coming to Terms with the Welfare of Hens Tina Widowski Department of Animal & Poultry Science University of Guelph Goals Different concepts of animal welfare and
More informationHAND BOOK OF POULTRY FARMING AND FEED FORMULATIONS
HAND BOOK OF POULTRY FARMING AND FEED FORMULATIONS WHY POULTY FARMING? GENERAL ANATOMY OF POULTRY Feathers of fowl The Skin Skeletal System of Fowl Muscular System The respiratory system of fowl The digestive
More informationHuman-Animal Interactions in the Turkey Industry
Human-Animal Interactions in the Turkey Industry Dr. Naomi A. Botheras 1, Ms. Jessica A. Pempek 2, Mr. Drew K. Enigk 2 1 PI, 222E Animal Sciences Building, 2029 Fyffe Court, Columbus, OH 43210 (614) 292-3776;
More informationResearch Into Sex Linked Control of Bodyweight in Poultry and Rabbits
Research Into Sex Linked Control of Bodyweight in Poultry and Rabbits BY R. G. BEILHARV SUMMARY Sixteen weeks bodyweight from one progeny group of rabbits, and six weeks bodyweight from progeny groups
More informationMANAGING AVIARY SYSTEMS TO ACHIEVE OPTIMAL RESULTS. TOPICS:
MANAGING AVIARY SYSTEMS TO ACHIEVE OPTIMAL RESULTS. TOPICS: Housing system System design Minimiza2on of stress Ligh2ng Ven2la2on Feed run 2mes Feed placement Watering Water placement Perch Scratch material
More informationEffect of Storage and Layer Age on Quality of Eggs From Two Lines of Hens 1
Effect of Storage and Layer Age on Quality of Eggs From Two Lines of Hens 1 F. G. Silversides*,2 and T. A. Scott *Crops and Livestock Research Centre, Charlottetown, Prince Edward Island, Canada C1A 7M8
More informationBREEDING AND GENETICS. Comparative Evaluation of Three Commercial Broiler Stocks in Hot Versus Temperate Climates
BREEDING AND GENETICS Comparative Evaluation of Three Commercial Broiler Stocks in Hot Versus Temperate Climates SERVET YALÇIN,* PETEK SETTAR,* SEZEN OZKAN,* and AVIGDOR CAHANER,1 *The Aegean University,
More informationUnit 3 Sustainability and interdependence Sub Topic 3.4: Animal welfare
Unit 3 Sustainability and interdependence Sub Topic 3.4: Animal welfare Page 1 of 12 On completion of this topic I will be able to: Describe the costs, benefits and ethics of providing different levels
More informationEffects of Dietary Modification on Laying Hens in High-Rise Houses: Part II Hen Production Performance
AS 5 ASL R2451 2009 Effects of Dietary Modification on Laying Hens in High-Rise Houses: Part II Hen Production Performance Stacey Roberts Iowa State University Hongwei Li Iowa State University Hongwei
More informationfeather pecking. Animal Needs Index focuses on housing and management and the plumage
WELFARE ASSESSMENT OF POULTRY IN ALTERNATIVE HOUSING: COMPARISON BETWEEN ANIMAL NEEDS INDEX AND ASSESSING FEATHER PECKING DAMAGE Monique Bestman (corr. author) & Jan-Paul Wagenaar Louis Bolk Instituut,
More informationRURAL INDUSTRIES RESEARCH AND DEVELOPMENT CORPORATION FINAL REPORT. Improvement in egg shell quality at high temperatures
RURAL INDUSTRIES RESEARCH AND DEVELOPMENT CORPORATION FINAL REPORT Project Title: Improvement in egg shell quality at high temperatures RIRDC Project No.: US-43A Research Organisation: University of Sydney
More informationGenetic improvement For Alternative Hen-Housing
Genetic improvement For Alternative Hen-Housing Dr. Neil O Sullivan Hy-Line International 2015 Egg Industry Issues Forum Hy-Line International Genetic Excellence ! The Decision Process used in Breeding
More informationThe effect of choice-feeding from 7 weeks of age on the production characteristics of laying hens
110 The effect of choice-feeding from 7 weeks of age on the production characteristics of laying hens M. D. Olver and D. D. Malan # ARC Animal Nutrition and Animal Products Institute, Private Bag X2, Irene
More informationENVIRONMENT, WELL-BEING, AND BEHAVIOR
ENVIRONMENT, WELL-BEING, AND BEHAVIOR The effect of perch availability during pullet rearing and egg laying on the behavior of caged White Leghorn hens 1 P. Y. Hester,* 2 J. P. Garner, S. A. Enneking,*
More informationThe effect of perches in cages during pullet rearing and egg laying on hen performance, foot health, and plumage
The effect of perches in cages during pullet rearing and egg laying on hen performance, foot health, and plumage P. Y. Hester,* 1 S. A. Enneking,* K. Y. Jefferson-Moore, M. E. Einstein,* H. W. Cheng, and
More informationEffects of Cage Stocking Density on Feeding Behaviors of Group-Housed Laying Hens
AS 651 ASL R2018 2005 Effects of Cage Stocking Density on Feeding Behaviors of Group-Housed Laying Hens R. N. Cook Iowa State University Hongwei Xin Iowa State University, hxin@iastate.edu Recommended
More informationThe 1999 EU Hens Directive bans the conventional battery cage from 2012.
PS/MJ/BR9718 April 2002 ENRICHED CAGES FOR EGG-LAYING HENS B R I E F I N G EU ban on the conventional battery cage The 1999 EU Hens Directive bans the conventional battery cage from 2012. The ban is well
More informationEXECUTIVE SUMMARY. Assessment of layer hen welfare
EXECUTIVE SUMMARY There are two main types of housing systems for layer hens in Australia. The first is conventional or battery cages, which are barren wire cages, set in rows and tiers. A small number
More informationAnimal Welfare Assessment and Challenges Applicable to Pregnant Sow Housing
Animal Welfare Assessment and Challenges Applicable to Pregnant Sow Housing Gail C. Golab, PhD, DVM, MANZCVS, DACAW Director, Animal Welfare Division To Cover How AVMA approaches animal welfare issues
More informationBack to basics - Accommodating birds in the laboratory setting
Back to basics - Accommodating birds in the laboratory setting Penny Hawkins Research Animals Department, RSPCA, UK Helping animals through welfare science Aim: to provide practical information on refining
More informationEGG production of turkeys is not important
A Study of Egg Production in Bronze Turkeys S. J. MAESDEN National Agricultural Research Center, Beltsville, Maryland EGG production of turkeys is not important commercially but good egg production during
More informationLAYING BEHAVIOUR OF EGG AND MEAT TYPE CHICKEN AS INFLUENCED BY NEST TIER
Wayamba Journal of Animal Science ISSN: 2012-578X; P839-P844, 2014 First Submitted December 01, 2013; Number 1385910056 LAYING BEHAVIOUR OF EGG AND MEAT TYPE CHICKEN AS INFLUENCED BY NEST TIER B. Roy 1,
More informationPresence of Males Within Laying Hens Affects Tonic Immobility Response and Sociality
International Journal of Poultry Science 9 (12): 1087-1091, 2010 ISSN 1682-8356 Asian Network for Scientific Information, 2010 Presence of Males Within Laying Hens Affects Tonic Immobility Response and
More informationEDUCATION AND PRODUCTION
EDUCATION AND PRODUCTION Effects of Floor Versus Cage Rearing and Feeder Space on Growth, Long Bone Development, and Duration of Tonic Immobility in Single Comb White Leghorn Pullets 1 ' 2 K. E. ANDERSON
More informationFemale Persistency Post-Peak - Managing Fertility and Production
May 2013 Female Persistency Post-Peak - Managing Fertility and Production Michael Longley, Global Technical Transfer Manager Summary Introduction Chick numbers are most often reduced during the period
More informationHERITABILITY ESTIMATES OF HATCHING
HERITABILITY ESTIMATES OF HATCHING TIME IN THE FAYOUMI CHICKENS F. H. ABDOU H. AYOUB* Animal Production Department, Shebin El-Kom, Tanta Univ. Faculty of Agric., * Faculty of Agric., Ain Shams Univ., Cairo
More informationSummary. Plymouth Rock (PP), Light Sussex (SS) and their recriprocal Crosses. Sixteen
Egyptian Genetic correlation between length of wattles and female body weight at sexual maturity in the foul H. AYOUB, M. F. AMER S. SHALASH Faculty of agvicultuve Ainshams univevsity, Cairo., Égyfit.
More informationCIWF Response to the Coalition for Sustainable Egg Supply Study April 2015
CIWF Response to the Coalition for Sustainable Egg Supply Study April 2015 The Coalition for Sustainable Egg Supply study seeks to understand the sustainability impacts of three laying hen housing systems
More informationNova-Tech Engineering. Overview of Industry and NTE Value Propositions Animal Welfare Update
Nova-Tech Engineering Overview of Industry and NTE Value Propositions Animal Welfare Update Nova Tech Purpose Statement We create revolutionary solutions that advance our customer s ability to feed the
More informationCoalition for a Sustainable Egg Supply Richard Blatchford University of California, Davis
Coalition for a Sustainable Egg Supply Richard Blatchford University of California, Davis Growing public interest in food production Concern about hen welfare, focusing on conventional cages Overview Egg
More informationINHERITANCE OF BODY WEIGHT IN DOMESTIC FOWL. Single Comb White Leghorn breeds of fowl and in their hybrids.
440 GENETICS: N. F. WATERS PROC. N. A. S. and genetical behavior of this form is not incompatible with the segmental interchange theory of circle formation in Oenothera. Summary.-It is impossible for the
More informationLong-Term Selection for Body Weight in Japanese Quail Under Different Environments
Long-Term Selection for Body Weight in Japanese Quail Under Different Environments H. L. MARKS USDA, Agricultural Research Service, Southeastern Poultry Research Laboratory, c/o The University of Georgia,
More informationEffect of Calcium Level of the Developing and Laying Ration on Hatchability of Eggs and on Viability and Growth Rate of Progeny of Young Pullets 1
1328 E. J. DAY AND B. C. DILWOETH for calcium:phosphorus ratios shows that toe ash was lowest for the birds receiving the rations containing the most narrow calcium:phosphorus ratio. Again, this observation
More informationExterior egg quality as affected by enrichment resources layout in furnished laying-hen cages
Open Access Asian-Australas J Anim Sci Vol. 30, No. 10:1495-1499 October 2017 https://doi.org/10.5713/ajas.16.0794 pissn 1011-2367 eissn 1976-5517 Exterior egg quality as affected by enrichment resources
More informationChrista F. Honaker. Master of Science in Animal and Poultry Science. P. L. Ruszler D. M. Denbow A. P. McElroy D. W. Reaves
The Effects of Beak Trimming and Claw Reduction on Growing and Early Laying Parameters, Fearfulness, and Heterophil to Lymphocyte Ratios Christa F. Honaker Thesis submitted to the Faculty of the Virginia
More informationDubbing Production--Bred Single--Comb White Leghorns
HAWAII AGRICULTURAL EXPERIMENT STATION CIRCULAR No. 20 f, Dubbing Production--Bred Single--Comb White Leghorns By C. M. BICE HONOLULU, U. S. A. J UNE 1942 HAWAII AGRICULTURAL EXPERIMENT STATION UNIVERSITY
More informationProposed Draft Australian Animal Welfare Standards And Guidelines For Poultry. Submission from the Australian Veterinary Association Ltd
Proposed Draft Australian Animal Welfare Standards And Guidelines For Poultry Submission from the Australian Veterinary Association Ltd 1 24 February 2018 Introduction The Australian Veterinary Association
More informationEDUCATION AND PRODUCTION
EDUCATION AND PRODUCTION Effects of Light Intensity from Photostimulation in Four Strains of Commercial Egg Layers: 1. Ovarian Morphology and Carcass Parameters R. A. Renema and F. E. Robinson 1 Department
More informationThis article is downloaded from.
This article is downloaded from http://researchoutput.csu.edu.au It is the paper published as: Author: A. Wichman, L. Rogers and R. Freire Title: Visual lateralisation and development of spatial and social
More informationUnit A: Introduction to Poultry Science. Lesson 1: Exploring the Poultry Industry
Unit A: Introduction to Poultry Science Lesson 1: Exploring the Poultry Industry 1 Terms Broilers Chick Cockerels Drake Duckling Gander Goose Gosling Hen Layers Poult Poultry Pullet Producers Pullets Roosters
More informationPerformance of Broiler Breeders as Affected by Body Weight During the Breeding Season 1
Performance of Broiler Breeders as Affected by Body Weight During the Breeding Season 1 H. R. WILSON and R. H. HARMS Department of Poultry Science, University of Florida, Gainesville, Florida 32611 (Received
More informationP O U LTOS CIE N G E
P O U LTOS CIE N G E January, 1943? Vol. XXII, No. 1 The Relative Efficiency of Gains in Weight Made by Male and Female Bronze Turkeys* CONSIDERABLE data have been collected on feed used by turkeys at
More informationRelationship between hen age, body weight, laying rate, egg weight and rearing system
Relationship between hen age, body weight, laying rate, egg weight and rearing system S.WĘŻYK, J. KRAWCZYK, CALIK J. and K. POŁTOWICZ National Research Institute of Animal Production, 32-083 Balice n.
More informationPAUL GRIGNON DUMOULIN
PAUL GRIGNON DUMOULIN Bodyweight management and its impact in layers TOKYO July 12-13th, 2016 Introduction Bodyweight is one of the most important parameters to track in farms : In rearing : check the
More informationDepartment of Animal and Poultry Sciences August 2, 1999
Department of Animal and Poultry Sciences August 2, 1999 Erratic Oviposition and Defective Egg Syndrome (EODES) Effects of Genetic Selection for Body Weight Héctor L. Santiago ABSTRACT Reproductive performance
More informationSummary. investigation programs. Estimation of general and specific combining abilities from a diallel cross of three inbred lines of Fayoumi chicks
week Estimation of general and specific combining abilities from a diallel cross of three inbred lines of Fayoumi chicks M. SOLTAN, F. H. ABDOU, M. ABD-ELLATIF H. AYOUB* Faculty of Agvic., Shebin EL-Kom,
More informationFemale Persistency Post-Peak - Managing Fertility and Production
Female Persistency Post-Peak - Managing Fertility and Production Michael Longley, Global Technical Transfer Manager May 2013 SUMMARY Introduction Chick numbers are most often reduced during the period
More informationTHE LAYING OF FLOOR EGGS BY BREEDER HENS AS INFLUENCED BY NESTING BEHAVIOUR AND SHED DESIGN SUMMARY
137 THE LAYING OF FLOOR EGGS BY BREEDER HENS AS INFLUENCED BY NESTING BEHAVIOUR AND SHED DESIGN VIVIEN G. KITE*, MANIKA WODZICKA-TOMASZEWSKA* and R.B. CUMMNG** SUMMARY The laying of eggs 011 the shed floor
More informationNORFA: The Norwegian-Egyptian project for improving local breeds of laying hens in Egypt
Kolstad & Abdou NORFA: The Norwegian-Egyptian project for improving local breeds of laying hens in Egypt N. Kolstad 1 & F. H. Abdou 2 1 Department of Animal Science, Agricultural University of Norway,
More informationImpact of Cage Density on Pullet Performance and Blood Parameters of Stress 1
Impact of Cage Density on Pullet Performance and Blood Parameters of Stress 1 P. H. PATTERSON,2 and H. S. SIEGEL Department of Poultry Science, The Pennsylvania State University, University Park, Pennsylvania
More informationFEEDER and FLOOR SPACE upon groy11ng TURKEYS. The effect of. in confinement. Wooster, Ohio OHIO AGRICULTURAL EXPERIMENT STATION J. W.
RESEARCH CIRCULAR 87 JULY 1960 The effect of FEEDER and FLOOR SPACE upon groy11ng TURKEYS in confinement J. W. WYNE M. G. McCARTNEY R. D. CARTER V. D. CHAMBERLIN OHIO AGRICULTURAL EXPERIMENT STATION Wooster,
More informationDimethyl anthranilate based repellents affect cage pecking and feather condition of laying hens
Dimethyl anthranilate based repellents affect cage pecking and feather condition of laying hens Animal Science Days September 21 st 2017 Uroš Šraj 2, Dušan Terčič 1, Dušanka Jordan 1, Mojca Pestotnik 1,
More informationC O N T E N T S 1. INTRODUCTION
C O N T E N T S 1. Introduction...1 2. Principles of prosperous rearing period...2 3. Living space for chickens...2 4. Feeding space...2 5. Informative average feed consumption and body weight of final
More informationAn Evaluation of Pullet and Young Laying Hen Ammonia Aversion Using a Preference Test Chamber
Agricultural and Biosystems Engineering Conference Proceedings and Presentations Agricultural and Biosystems Engineering 6-2009 An Evaluation of Pullet and Young Laying Hen Ammonia Aversion Using a Preference
More informationFFA Poultry Career Development Event 2004 Poultry Judging District Contests
FFA Poultry Career Development Event 2004 Poultry Judging District Contests 1. In a market broiler house, heaters should be turned on to preheat the house hours before the chicks arrival. A. 5-10 hours
More informationImproving Growth and Yield of Commercial Pheasants Through Diet Alteration and Feeding Program
Improving Growth and Yield of Commercial Pheasants Through Diet Alteration and Feeding Program Sandra G. Velleman 1 and Nicholas B. Anthony 2 1 Department of Animal Sciences, The Ohio State University
More informationOptimizing lighting for precision broiler breeder feeding. Grégory Bédécarrats Department of Animal Biosciences University of Guelph
Optimizing lighting for precision broiler breeder feeding Grégory Bédécarrats Department of Animal Biosciences University of Guelph Team and Project Objectives Dr. Bedecarrats, University of Guelph: Experiment
More informationEffects of Furnished Cage Type on Behavior and Welfare of Laying Hens
1 Open Access Asian Australas. J. Anim. Sci. [Epub ahead of print] http://dx.doi.org/10.5713/ajas.15.0576 www.ajas.info pissn 1011-2367 eissn 1976-5517 Effects of Furnished Cage Type on Behavior and Welfare
More information2018 HY-LINE BROWN SCHOOL EGG LAYING COMPETITION INFORMATION BOOKLET. Proudly supported by
2018 HY-LINE BROWN SCHOOL EGG LAYING COMPETITION INFORMATION BOOKLET Proudly supported by WELCOME On behalf of the RNA Poultry, Pigeons, Birds and Eggs Committee, I would like to welcome your school to
More informationBreed Selection for a Small-Scale Egg-Production Enterprise
ASC-231 University of Kentucky College of Agriculture, Food and Environment Cooperative Extension Service Breed Selection for a Small-Scale Egg-Production Enterprise Jacquie Jacob and Tony Pescatore, Animal
More informationHow Does Photostimulation Age Alter the Interaction Between Body Size and a Bonus Feeding Program During Sexual Maturation?
16 How Does Photostimulation Age Alter the Interaction Between Body Size and a Bonus Feeding Program During Sexual Maturation? R A Renema*, F E Robinson*, and J A Proudman** *Alberta Poultry Research Centre,
More informationPoultry Science Journal ISSN: (Print), (Online) DOI: /psj
Poultry Science Journal ISSN: 2345-6604 (Print), 2345-6566 (Online) http://psj.gau.ac.ir DOI: 10.22069/psj.2018.14112.1292 Effect of High and Low Stocking Density on Age of Maturity, Egg Production, Egg
More informationPARAMETERS OF THE FINAL HYBRID DOMINANT LEGHORN D 229
CMG_PARENT_STOCK+FINAL_HYBRID_OBALKA-VNITRNI.qxp 28.7.2010 21:16 Page 1 PARAMETERS OF THE FINAL HYBRID DOMINANT LEGHORN D 229 GROWING PERIOD: 1-18 WEEK OF AGE Livability.........................................................
More informationBody weight, feed coefficient and carcass characteristics of two strain quails and their reciprocal crosses
1 Body weight, feed coefficient and carcass characteristics of two strain quails and their reciprocal crosses N.VALI 1, EDRISS, M.A. 2 and RAHMANI, H.R. 2 1 Department of Animal Sciences, faculty of Agriculture
More informationEffects of Three Lighting Programs During Grow on the Performance of Commercial Egg Laying Varieties
Effects of Three Lighting Programs During Grow on the Performance of Commercial Egg Laying Varieties 2. Laying Period Egg Production J. Arango, P. Settar, S. Saxena, J. Arthur, N.P. O Sullivan Hy-Line
More informationUse of Cool Perches by Broiler Chickens 1
Use of Cool Perches by Broiler Chickens 1 I. Estevez,*,2 N. Tablante, R. L. Pettit-Riley,* and L. Carr *Department of Animal and Avian Sciences; Virginia-Maryland Regional College of Veterinary Medicine;
More informationSummary. Inheritance of body weight and breast length of age in meat type strains of chickens. Introduction. at 8 weeks. Faculty of agriculture
Inheritance of body weight and breast length of age in meat type strains of chickens at 8 weeks H. AYOUB M. KHIRELDIN S. SHALASH Faculty of agriculture Ain shams university, Cairo, Egypt Summary Two pure
More informationCHAPTER3. Materials and methods
CHAPTER3 Materials and methods 3.1 Experimental Site and Housing The study was conducted at the Animal Production Institute of the Agricultural Research Council (ARC) Irene, in Gauteng Province of South
More informationTHICK ALBUMEN HEIGHT OF EGGS FROM TWO HYBRIDS MOLTED HENS. Natasha Gjorgovska 1, Kiril Filev 2. Abstract
THICK ALBUMEN HEIGHT OF EGGS FROM TWO HYBRIDS MOLTED HENS Natasha Gjorgovska 1, Kiril Filev 2 Abstract Molting could be initiate on different ways, but methods with application of restriction of feed and
More informationSCHOOL PROJECT GUIDELINES
SCHOOL PROJECT GUIDELINES The ACMF Hatching Careers School Project is available for schools as an educational resource and to promote career opportunities in the chicken meat industry to primary and secondary
More informationTHE WELFARE OF ANIMALS IN PRODUCTION SYSTEMS
THE WELFARE OF ANIMALS IN PRODUCTION SYSTEMS General Principles and Underlying Research David Fraser Animal Welfare Program University of British Columbia General principles for the welfare of animals
More informationApplied Animal Behaviour Science 126 (2010) Contents lists available at ScienceDirect Applied Animal Behaviour Science journal homepage:
Applied Animal Behaviour Science 126 (2010) 134139 Contents lists available at ScienceDirect Applied Animal Behaviour Science journal homepage: www.elsevier.com/locate/applanim Effect of crate height during
More informationPerformance of Sudanese native Dwarf and Bare Neck Chicken raised under improved traditional production system
AGRICULTURE AND BIOLOGY JOURNAL OF NORTH AMERICA ISSN Print: 2151-7517, ISSN Online: 2151-7525, doi:10.5251/abjna.2011.2.5.860.866 2011, ScienceHuβ, http://www.scihub.org/abjna Performance of Sudanese
More informationEDUCATION AND PRODUCTION. The Relationships Among Measures of Egg Albumen Height, ph, and Whipping Volume 1
EDUCATION AND PRODUCTION The Relationships Among Measures of Egg Albumen Height, ph, and Whipping Volume 1 F. G. Silversides*,,2 and K. Budgell *Crops and Livestock Research Centre, Charlottetown, Prince
More informationEffects of Different Floor Systems and the Bird s Age on Body Weight Gain and Feather Score of Broiler Breeder Hens
The Journal of Agricultural Sciences - Sri Lanka Vol. 14, No. 1, January 2019. Pp 49-56 http://dx.doi.org/10.4038/jas.v14i1.8456 Open Access Article Effects of Different Floor Systems and the Bird s Age
More informationKey facts for maximum broiler performance. Changing broiler requires a change of approach
Key facts for maximum broiler performance Changing broiler requires a change of approach Good chick quality = UNIFORMITY everywhere in the supply chain Performance 1. Professional breeder house / management
More informationEvaluation of plumage condition and foot pad health of laying hens housed in small group housing systems, furnished cages and an aviary system
Evaluation of plumage condition and foot pad health of laying hens housed in small group housing systems, furnished cages and an aviary system S. RÖNCHEN 1 *, H. HAMANN 1 and O. DISTL 1 Institute for Animal
More informationPerformance of Naked Neck and Normal Broilers in Hot, Warm, and Temperate Climates
Performance of Naked Neck and Normal Broilers in Hot, Warm, and Temperate Climates S. YALÇIN,* A. TESTIK, S. OZKAN,* P. SETTAR,* F. ÇELEN, and A. CAHANER,1 *The Aegean University, Faculty of Agriculture,
More informationHatchability and Early Chick Growth Potential of Broiler Breeder Eggs with Hairline Cracks
2004 Poultry Science Association, Inc. Hatchability and Early Chick Growth Potential of Broiler Breeder Eggs with Hairline Cracks D. M. Barnett, B. L. Kumpula, R. L. Petryk, N. A. Robinson, R. A. Renema,
More informationREARING LAYING HENS IN A BARN SYSTEM WITHOUT BEAK TRIMMING: THE RONDEEL EXAMPLE
REARING LAYING HENS IN A BARN SYSTEM WITHOUT BEAK TRIMMING: THE RONDEEL EXAMPLE BACKGROUND: BEAK TRIMMING AND FEATHER PECKING IN LAYING HENS Injurious feather pecking is a major welfare problem in laying
More informationEffects on egg quality traits of crossing Egyptian Golden Montazah with White Leghorn chickens
Effects on egg quality traits of crossing Egyptian Golden Montazah with White Leghorn chickens Abstract M H Khalil, M M Iraqi and M M El-Atrouny Department of Animal Production, Faculty of Agriculture
More informationPOULTRY WELFARE STANDARDS AND GUIDELINES LAYER HEN CAGES SUPPORTING PAPER PUBLIC CONSULTATON VERSION
POULTRY WELFARE STANDARDS AND GUIDELINES LAYER HEN CAGES SUPPORTING PAPER PUBLIC CONSULTATON VERSION Prepared by the Poultry Standards and Guidelines Drafting Group, Oct 2016 ISSUE Whether poultry should
More informationRELATIONSHIPS AMONG WEIGHTS AND CALVING PERFORMANCE OF HEIFERS IN A HERD OF UNSELECTED CATTLE
RELATIONSHIPS AMONG WEIGHTS AND CALVING PERFORMANCE OF HEIFERS IN A HERD OF UNSELECTED CATTLE T. C. NELSEN, R. E. SHORT, J. J. URICK and W. L. REYNOLDS1, USA SUMMARY Two important traits of a productive
More informationAssorted Guinea Brown egg layers: Black Sex Link Golden Sex Link Red Sex Link
Note: Shipments are received approximately 1 (one) or 2 (two) days after hatch date! Note: Pullets- Pre sexed chicks at the Ideal Hatchery St Runs- Not pre sexed at the Ideal hatchery Note: Hatch date
More informationRecommended Resources: The following resources may be useful in teaching
Unit C: Poultry Management Lesson 2: Feeding, Management and Equipment for Poultry Student Learning Objectives: Instruction in this lesson should result in students achieving the following objectives:
More informationOriginal article. Genetic study on Dandarawy chickens. II. Heritability of live and carcass measurements. M.A. Abdellatif
Original article Genetic study on Dandarawy chickens. II. Heritability of live and carcass measurements M.A. Abdellatif Assiut University, Faculty of Agriculture, Animal Production Department, Assiut Egypt
More informationINFO SHEET. Cull Eggs: What To Expect And How To Reduce The Incidence.
INFO SHEET Cull Eggs: What To Expect And How To Reduce The Incidence info.hybrid@hendrix-genetics.com www.hybridturkeys.com Introduction Over the years, several Hybrid customers have inquired about the
More informationGenetic evaluation for egg production traits in Japanese quail.
BENHA VETERINARY MEDICAL JOURNAL, VOL. 8, NO. 1:178 185, MARCH 015 Genetic evaluation for egg production traits in Japanese quail. Eman A. Manaa 1, Khairy M. ElBayomi, Gamal A. Sosa 3 1 Department of animal
More information