A part of the Japan Sea form of the threespine stickleback, Gasterosteus aculeatus, spawns in the seawater tidal pools of western Hokkaido Island, Japan |
| |
| Authors: | Manabu Kume Tomoaki Kuwahara Takaomi Arai Michitoshi Okamoto Akira Goto |
| |
| Institution: | (1) Laboratory of Breeding Science, Graduate School of Fisheries Sciences, Hokkaido University, 3-1-1 Minato-cho, Hakodate, Hokkaido 041-8611, Japan;(2) Kon Photography and Research, 9-2-3-9 Misono, Toyohira-ku, Sapporo, Hokkaido 062-0009, Japan;(3) International Coastal Research Center, Ocean Research Institute, The University of Tokyo, 2-106-1 Akahama, Otsuchi, Iwate 028-1102, Japan;(4) Sapporo Salmon Museum, 2-1 Makomanai Park, Minami-ku, Sapporo, Hokkaido 005-0017, Japan;(5) Laboratory of Aquaculture Genetics and Genomics, Graduate School of Fisheries Sciences, Hokkaido University, 3-1-1 Minato-cho, Hakodate, Hokkaido 041-8611, Japan |
| |
| Abstract: | The Japan sea form of the threespine stickleback, Gasterosteus aculeatus, was found to spawn in the seawater tidal pool of the Cape Benkei, western Hokkaido Island, Japan, in 2001 and 2003. Nest-guarding males, adult females and juveniles of this form were also observed in four tidal pools of the Capes Benkei, Kabuto and Kamui, in 2001–2003. Otolith Sr:Ca ratios in sticklebacks collected from these tidal pools were relative high from the core to the edge, suggesting they lived in seawater environments throughout its life cycle. These findings suggest that a part of the Japan Sea formȁ9s individuals in western Hokkaido Island have the potential to breed in the coastal sea and the life history style has evolved in dependence on the seawater environment. |
| |
| Keywords: | Breeding ground Salinity tolerance Otolith Sr:Ca ratios Migratory history |
| 本文献已被 SpringerLink 等数据库收录！ |
|
