沖縄島国場川水系饒波川から採集されたクサガメ, ヤエヤマイシガメおよび両種の雑種と推定されるカメの記録.

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1 Title 沖縄島国場川水系饒波川から採集されたクサガメ, ヤエヤマイシガメおよび両種の雑種と推定されるカメの記録 Author(s) 嶋津, 信彦 Citation Fauna Ryukyuana, 18: 1-8 Issue Date URL Rights

2 Fauna Ryukyuana ISSN , , 11, ; 3 ;., 1..; ] Testudines Geoemydidae Mauremys reevesii (Gray, 1831),,,,,, 1, ( 2007a; Suzuki et al. 2011). M. mutica (Cantor, 1842), M. m. mutica (Cantor, 1842), 1, M. m. kami (Yasukawa, Ota & Iverson, 1996), 1, ;. (Yasukawa et al. 1996; 2007b)., 1., ; ( 1998; 2011). ; (, ),,,,, 1 1 ( 2005; 2006; 2009; 2012),, ;. ( 2007).,, () ;1,. ( 2008).,, 1; ; (, ;, ;;, ), (). Fig. 1. A map of the Noha River, a substream of the Kokuba River system on Okinawa Island, showing the sites where turtle specimens (Mauremys) were collected in 2010 (closed circles, Chinese pond turtle Mauremys reevesii; open circles, putative hybrid individual M. reevesii M. mutica; black line, searching route), and the area searched in 2013 (area within two dashed lines). 1

3 (, 15.6 km) 9.0 km, Mauremys 2 (D, 1.2 m, 35 cm, ; 40 cm,. 1 mm) ( 1). (Panasonic, FT 1),.., (2011) [. ;, , 2010 ; ( 11.0 km ) 1.0 km,. (, fn 41, ; 72 cm, ; 44 cm, 55 cm, 11 mm, 1.7 m) 2, 3.,, ( 1, 1) g ( )., (, CD 20PSX). 1 mm, (, KW 001). 1 g.,.., (Mao 1971; 2007b).,,,,. ( 2007a).,,.. (Yasukawa et al. 1996; 2007b).,, ;,.,,,. ( 2007ab).,, cm, ; ;. Table 1. Measurements of the Chinese pond turtle Mauremys reevesii, Yaeyama yellow pond turtle M. mutica kami, and putative hybrids (M. reevesii M. m. kami) collected from the Noha River, a substream of the Kokuba River system, Okinawa Island, between June and November, No. Taxa Collection date Sex (mm) Carapace length (mm) Plastrum length (g) Body weight 1 Mauremys reevesii Male Mauremys mutica kami Male Mauremys mutica kami Female Mauremys mutica kami Female Mauremys mutica kami Female Mauremys mutica kami Male Mauremys mutica kami Unknown Mauremys mutica kami Unknown Mauremys mutica kami Male Mauremys mutica kami Female Mauremys mutica kami Female Mauremys mutica kami Female Male cf. Mauremys reevesii Mauremys mutica kami 14 cf. Mauremys reevesii Mauremys mutica kami Male [Report] Shimadzu: Records of introduced turtles from Noha River

4 Fauna Ryukyuana, 18: (, 1996; 2007b).,, 14 cm, 14 cm... (, 2007b). ;, (Panasonic, FT 4) ( 1). 2010, 1, 1 ; ( 1, 2)..,. 2013, 1 (No. 1;, 1, 3, 1 ), 11 (No. 2 12), 2 (No. 13, 14) ; ( 1; ). 11 ;, 6, , ± 29.5 (77 180) mm ( ± ( )). [, (n = 6) ± 9.7 ( ) mm, (n = 3) ± 4.4 ( ) mm. No. 5,. ( 1). No. 13, 14,. ( 3).,.,. ( ; () ; (). Fig. 2. A Chinese pond turtle Mauremys reevesii (upper) and a putative hybrid individual (lower, M. reevesii M. mutica) observed at the Noha River, a substream of the Kokuba River system, Okinawa Island, on September 11, ( 3

5 ; (No. 1), (No. 3), ; 2 (No. 13, 14). 1, 1. Fig. 3. Lateral view of head and neck region of a Chinese pond turtle Mauremys reevesii (Specimen No. 1), a Yaeyama yellow pond turtle M. mutica kami (No. 3), and two putative hybrid individuals M. reevesii M. m. kami (No. 13, 14), all collected from the Noha River, a substream of the Kokuba River system, Okinawa Island, between June and November Numbers shown in photographs correspond to those in Table 1 and Appendix ab). No. 14,,. No. 13, 14, ;.,,, ;. No. 13,., 2010 ;, mm ].,.,.;[ ;. ; 2, 11, 3, ( 2007, 2008), 1.,, ;. ( 1997)., 1;, 1, ;.., ;. ;.,.. 4 [Report] Shimadzu: Records of introduced turtles from Noha River

6 Fauna Ryukyuana, 18: 1 8. No. 14, 2004, 2005 ;. ( 2006; 2007).,..,. ;., [,, ] ( 2007a).,.,, [, ( 2007b). No. 13 ;,., 219 mm 190 mm. (Yasukawa et al. 1996; 2007b; 2012). No. 13, 195 mm, 1..,, ;. ;..]1.,, 1,, ;;., () :... : , ;. (, )., 2005 (1): 73., ;., 45: , Akamata, 19: , , 5: , , 2006(1): Mao S.H., Turtles of Taiwan: A natural history of the turtles. Commercial Press, Taipei, Taiwan., ; Chinemys reevesii (: )., 36: , [, 6: , (), 2. Pp ,,., ,., , 16: Suzuki D., H. Ota, H.S. Oh & T. Hikida, Origin of Japanese populations of Reeves pond turtle, Mauremys reevesii (Reptilia: Geoemydidae), as inferred by a molecular approach. Chelonian Conservation Biology. 10(2): ( 5

7 , ,., 2007a.,., 40: , 2007b.,., 39: Yasukawa Y., H. Ota, & J.B. Iverson, Geographic variation and sexual size dimorphism in Mauremys mutica (Cantor, 1842) (Reptilia: Bataguridae), with description of a new subspecies from the southern Ryukyus, Japan. Zoological Science, 13: Records of the Chinese pond turtle, Mauremys reevesii (Gray, 1831), the Yaeyama yellow pond turtle, M. mutica kami Yasukawa, Ota & Iverson, 1996, and putative hybrids (M. reevesii M. m. kami) collected from the Noha River, a substream of the Kokuba River system, Okinawa Island Nobuhiko Shimadzu Kobe, Hyogo, Japan (shimadzu1984@gmail.com) Abstract. Two Chinese pond turtles Mauremys reevesii, 11 Yaeyama yellow pond turtles M. mutica kami, and three putative hybrid individuals (M. reevesii M. m. kami) were collected from the Noha River, a substream of the Kokuba River system, Okinawa Island, in 2010 and These records suggest that exotic M. reevesii and M. mutica are naturally hybridizing on Okinawa Island. : : : [Report] Shimadzu: Records of introduced turtles from Noha River

8 Fauna Ryukyuana, 18: ;. 1, 3. Appendix 1. Carapace and plastrum of turtle specimens (Mauremys) collected from the Noha River, a substream of the Kokuba River system, Okinawa Island, between June and November Numbers shown in photographs correspond to those in Table 1 and Figure 3. ( 7

9 1.. Appendix 1. Continued. 8 [Report] Shimadzu: Records of introduced turtles from Noha River