Phytal animals in Sargassum beds in coastal areas of Kyoto Prefecture. Kousuke Yatsuya*, Tomokazu Nishigaki, Yozo Wada and Koji Takeno

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1 Phytal animals in Sargassum beds in coastal areas of Kyoto Prefecture Kousuke Yatsuya*, Tomokazu Nishigaki, Yozo Wada and Koji Takeno ha Mukai, Fig. 1 7 Yatsuya et al., 5; Amino Tango Peninsula Fig. 1 A map showing the study sites of Maizuru, Yoro, and Amino. Sargassum autumnale Myagropsis myagroides cm 25 cm.625 m mm 1% 2 Yoro Maizuru Sea of Japan Pacific Ocean * Seikai National Fisheries Research Institute, Taira-machi, Nagasaki , Japan

2 Total length (cm) Total length (cm) Total length (cm) Maizuru Mar. 3 Dec. 3 Mar. 4 Jun. 4 Sep. 4 Dec. 3 Dec. 3 Mar. 3 Yoro Jun. 3 Amino Mar. 4 Jun. 4 Sep. 4 Sep. 3 Fig. 2 Seasonal changes in the mean total length of sargassacean thalli collected for the investigation of phytal animals. Fig cm cm m cm cm cm cm cm Table Table Fig Fig. 3 1,169 3,317 /.625 m 2 6 1,317 /.625 m /.625 m 2 Table 1 Fig , /.625 m 2 4, /.625 m 2 Fig Table 1 Average number of species, number of individuals, and wet weight (g) per quadrat (25 cm x 25 cm) for each division of phytal animals in the Sargassum bed in Maizuru, Yoro, and Amino Maizuru Maizuru Amino Amino Porifera Porifera Porifera. -. Porifera Coelenterata Coelenterata Coelenterata.8.3. Coelenterata.8.5. Platyhelminthes.3.8. Platyhelminthes.4.8. Platyhelminthes.3.3. Platyhelminthes.1.1. Nemertinea Nemertinea Nemertinea.3.4. Nemertinea.4.5. Annelida Annelida Sipunculoidea.1.1. Sipunculoidea... Tentaculata Tentaculata Annelida Annelida Mollusca Mollusca Tentaculata.6..1 Tentaculata Arthropoda Arthropoda Mollusca Mollusca Echinodermata.1.1. Echinodermata.3.5. Arthropoda Arthropoda Prochordata Prochordata Echinodermata Echinodermata.1.1. Vertebrata Vertebrata Prochordata.3.5. Prochordata.6.1. Egg mass.6 -. Egg mass Egg mass.3 -. Egg mass.1 -. Total Total Total Total Yoro Yoro Yoro Yoro Wet weight Wet weight Wet weight Wet weight Porifera.4 -. Porifera. -. Porifera Porifera Coelenterata Coelenterata Coelenterata Coelenterata Platyhelminthes.4.4. Platyhelminthes Platyhelminthes.3.4. Platyhelminthes.3.6. Nemertinea Nemertinea Nemertinea Nemertinea Kamptozoa.1.. Kamptozoa.1.. Kamptozoa.4.. Kamptozoa.5..1 Sipunculoidea.5.5. Sipunculoidea... Sipunculoidea.5.5. Sipunculoidea.1.1. Annelida Annelida Annelida Annelida Tentaculata Tentaculata Tentaculata Tentaculata Mollusca Mollusca Mollusca Mollusca Arthropoda Arthropoda Arthropoda Arthropoda Echinodermata Echinodermata... Echinodermata.5.6. Echinodermata.4.4. Prochordata Prochordata Prochordata Prochordata Egg mass Egg mass.4 -. Egg mass Egg mass.3 -. Total Total Total Total Data indicate the mean value of each species of sargassaceae collected four to five times during this study 66

3 No. species 3 1 species No. species species No. species 3 1 species Mar. 3 Dec. 3 Mar. 4 Jun. 4 Sep. 4 Dec. 2 Mar. 3 Jun. 3 Sep. 3 Dec. 3 Apr. 4 Jul. 4 Sep. 4 No. individuals (ind./.625 ) 1 individuals No. individuals (ind./.625 ) individuals individuals Mar. 3 Dec. 3 Mar. 4 Jun. 4 Sep. 4 Dec. 2 Mar. 3 Jun. 3 Sep. 3 Dec. 3 Apr. 4 Jul. 4 Sep. 4 No. individuals (ind./.625 ) Wet weight (g/.625 ) Wet weight Wet weight Mar. 3 Dec. 3 Mar. 4 Jun. 4 Sep. 4 Dec. 2 Mar. 3 Jun. 3 Sep. 3 Wet weight (g/.625 ) Wet weight Dec. 3 Apr. 4 Jul. 4 Sep. 4 Fig. 3 Seasonal changes in the number of species, number of individuals, and wet weight (g) of phytal animals per quadrat (.625 m 2 ). Symbols indicate the mean of two samples. Wet weight (g/.625 ) , /.625 m 2 1, /.625 m 2 Fig /.625 m 2 /.625 m 2 Fig g/.625 m g/.625 m g/.625 m 2 Table 1 Fig. 3 Fig. 4 3 % 16% 13% 45% % 28% 25% 6% 27%13% % % % % % % % % % % % % % % % % % % S.autumnale S.autumnale S.autumnale S.patens S.patens S.patens species S.macroarpum individuals S.macroarpum Wet weight S.macroarpum Arthropoda Mollusea Annelida Arthropoda Mollusea Annelida Arthropoda Mollusea Annelida Fig. 4 Phytal animal compositions by the number of species, number of individuals, and wet weight (g) for the divisions of Arthropoda, Mollusca, Annelida, and others

4 Table 2 List of dominant phytal animals on each sargassacean species at Maizuru (a) Based on number of individuals Mar. 3 Diffalaba picta picta 41% Dynoides sp. 24% Caprella monoceros 35% Diffalaba picta picta 27% Podocerus sp. 13% Dec. 3 Mar. 4 Jun. 4 Sep. 4 Barleeia angustata 72% Barleeia angustata 45% Diffalaba picta picta 29% Cantharidus japonicus 11% Barleeia angustata 24% Cantharidus japonicus 16% Dynoides sp. 15% Eotricolia megastoma 15% No Data Mytilus galloprovincialis 68% Mytilus galloprovincialis 53% Boloceroides mcmurrichi 39% Boloceroides mcmurrichi 41% Eualus leptognathus % (b) Based on wet weight basis Mar. 3 Diffalaba picta picta 54% Dynoides sp. 21% Caprella monoceros 35% Diffalaba picta picta 25% Dynoides sp. 1% Dec. 3 Mar. 4 Jun. 4 Barleeia angustata 53% Eotricolia megastoma 24% Diffalaba picta picta 61% Eotricolia megastoma 12% Caprella danilevskii 36% Eotricolia megastoma 18% Dynoides sp. 11% Cantharidus japonicus 1% No Data Mytilus galloprovincialis 53% Nicolea sp. 28% Mytilus galloprovincialis 12% Boloceroides mcmurrichi % Diffalaba picta picta 13% Nicolea sp. 11% Sep. 4 Boloceroides mcmurrichi 34% Diffalaba picta picta 24% Percentage of the number of individuals (a) and wet weight (b) is also indicated for each species. Table 3 List of dominant phytal animals on each sargassacean species at Yoro (a) Based on number of individuals Dec. 2 Ericthonius pugnax 22% Boloceroides mcmurrichi 13% Dexiospira spp. 12% Diffalaba sp. 1% Ericthonius pugnax 19% Diffalaba sp. 17% Dexiospira spp. 16% Boloceroides mcmurrichi 16% Ericthonius pugnax 18% Dexiospira spp. 11% Caprella decipiens 11% Podocerus sp. 1% Dexiospira spp. 57% Boloceroides mcmurrichi 12% Mar. 3 Jun. 3 Eotricolia megastoma 36% Barleeia angustata 3% Caprella danilevskii 13% Barleeia angustata 34% Eotricolia megastoma 29% Ericthonius pugnax 13% Eotricolia megastoma 26% Platynereis bicanaliculata 19% Barleeia angustata 19% Filograna implexa 26% Podocerus sp. 17% Caprella danilevskii 15% Aoroides sp. 19% Eotricolia megastoma 19% Parampithoe orientalis 13% Jassa sp. 12% Aoroides sp. 19% Eotricolia megastoma 14% Euidotea ocellata 12% Parampithoe orientalis 12% Eotricolia megastoma 15% Nicolea sp. 1% Cantharidus callichroa 1% Cantharidus callichroa 17% Cantharidus japonicus 16% Heptacarpus futilirostris 12% Sep. 3 (b) Based on wet weight basis Dec. 2 Caprella verrucosa 32% Caprella danilevskii 31% Iphiplateia whiteleggei 38% Caprella danilevskii % Caprella danilevskii 22% Caprella verrucosa 12% Actiniaria 12% Ampithoe ramondi 17% Gammaropsis sp. 13% Podocerus sp. 1% Membranipora tuberculata 41% Boloceroides mcmurrichi 39% Boloceroides mcmurrichi 9% Boloceroides mcmurrichi 46% Didemnum spp. 21% Membranipora tuberculata 11% Boloceroides mcmurrichi 63% Didemnum spp. 13% Mar. 3 Jun. 3 Eotricolia megastoma 24% Egg mass 16% Barleeia angustata 13% Eotricolia megastoma 31% Barleeia angustata 19% Oerstedia spp. 12% Aplysia parvula 14% Eotricolia megastoma 13% Platynereis bicanaliculata 12% Mycale sp. 34% Didemnum spp. 31% Polyclinum sp. 1% Sertularella miurensis 49% Symplegma reptans 11% Sertularella miurensis 76% Didemnum spp. 26% Amathea distans 23% Cantharidus callichroa 1% Mycale sp. 3% Botryllidae 22% Symplegma reptans 48% Didemnum spp. 33% Cantharidus japonicus % Cantharidus callichroa 23% Sertularella inabai 13% Sep. 3 Symplegma reptans % Parapholas quadrizonata 19% Didemnum spp. 19% Pyrene testudinaria tylerae18% Symplegma reptans % Didemnum spp. 14% Percentage of the number of individuals (a) and wet weight (b) is also indicated for each species. 68

5 Table 4 List of dominant phytal animals on each sargassacean species at Amino (a) Based on number of individuals Dec. 3 Apr. 4 Eotricolia megastoma % Barleeia angustata 16% Hyale sp. 15% Dynoides sp. 1% Eotricolia megastoma 41% Barleeia angustata 32% Caprella danilevskii 21% Pentias sp. 12% Filograna implexa 21% Palinnotus sp. 18% Balanus trigonus 18% Eotricolia megastoma 11% Dynoides sp. 32% Holotelson tuberatus 27% Pentias sp. 17% Jul. 4 Barleeia angustata % Eotricolia megastoma 36% Ericthonius pugnax 29% Eotricolia megastoma 72% Parampithoe orientalis 11% Siriella sp. 31% Caprella danilevskii 31% Ampithoe ramondi 19% Balanus trigonus 12% Synidotea nipponensis 12% Hyale sp. 12% Caprella penantis 22% Hyale sp. 22% Trochidae 22% Harmothoe imbricata 11% Siriella sp. Sep. 4 11% Dynoides sp. 11% Limnoria lignorum 11% Pentias sp. 11% Ampithoe sp. 11% Caprella decipiens 11% (b) Based on wet weight basis Celleporina porosissima 54% Omphalius nigerrima Dec. 3 18% Celleporina porosissima 73% Eotricolia megastoma 27% Apr. 4 Jul. 4 Balanus trigonus 66% Actiniaria 17% Eotricolia megastoma 16% Holotelson tuberatus 16% Pentias sp. 14% Caprella decipiens 14% Celleporina porosissima 61% Coscinasterias acutispina 56% Celleporina porosissima 43% Balanus trigonus 23% Spongioradsia sp. 13% Celleporina porosissima Sep. 4 88% Septifer keenae % Percentage of the number of individuals (a) and wet weight (b) is also indicated for each species. 2% 4 Table Mytilus galloprovincialis Boloceroides mcmurrichi Fig Caprella monoceros Ericthonius pugnax Diffalaba picta pictabarleeia angustata 3 3 individuals/.625 Crustacea Decapoda Amphipoda Isopoda individuals/ Crustacea Decapoda Amphipoda Isopoda individuals/ Crustacea Decapoda amphipoda Isopoda Mar. 3 Dec. 3 Mar. 4 Jun. 4 Sep. 4 Dec. 2 Mar. 3 Jun. 3 Sep. 3 Dec. 3 Mar. 4 Jun. 4 Sep. 4 individuals/ Gastropoda Neogastropoda Mesogastropoda Archaeogastropoda Mar. 3 Dec. 3 Mar. 4 Jun. 4 Sep. 4 individuals/ Gastropoda Neogastropoda Mesogastropoda Archaeogastropoda Dec. 2 Mar. 3 Jun. 3 Sep. 3 Fig. 5 Seasonal changes in the number of individuals of Crustacea and Gastropoda. The Crustacea are divided into Isopoda, Amphipoda, Decapoda, and others, and the Gastropoda are divided into Archaeogastropoda, Mesogastropoda, Neogastropoda, and others. Data indicate the mean value for each sampling date. individuals/ Neogastropoda Mesogastropoda Archaeogastropoda Gastropoda Dec. 3 Mar. 4 Jun. 4 Sep

6 Eotricolia megastoma 71: : Fig : : Mukai H The phytal animals on the thalli Sargassum serratifolium in the Sargassum region, with reference to their seasonal fluctuations. Mar. Biol. 8: Yatsuya K, Nishigaki T, Douke A, Wada Y. 5. Annual net production of the five Sargassacese species in Yoro, western Wakasa Bay, Sea of Japan. Fish. Sci. 7