caa a22 4500 477116493 CHVBK 20180405111624.0 cr unu---uuuuu 170330e19960901xx s 000 0 eng 10.1007/BF00002375 doi (NATIONALLICENCE)springer-10.1007/BF00002375 Genetic evidence supporting the existence of two distinct species in the genus Gasterosteus around Japan [Elektronische Daten] [Masahito Higuchi, Akira Goto] Synopsis: The genetic and morphological features ofGasterosteus aculeatus were investigated for 29 populations around Japan. Allozyme analyses recognized two groups (Pacific Ocean group and Japan Sea group) that had distinct characteristic features, and showed high genetic differentiation between them (D = 0.482). The Pacific Ocean group had a wide range, from North America to Japan, along the Pacific coast. The distribution of the Japan Sea group was limited around the Sea of Japan and the Sea of Okhotsk. The distribution of these groups were found to be sympatric on the Pacific coast of Hokkaido Island, Japan. From this area, genetic analyses demonstrated that the sympatric populations of the two groups formed independent breeding stocks, and it is considered that the two groups were reproductively isolated from each other. Additionally, each group had distinctive morphological features of lateral plates and caudal keels in the sympatric area. These results suggested that these two groups of the threespine stickleback comprise different species and that the Japan Sea group is taxonomically distinguishable fromG. aculeatus. Kluwer Academic Publishers, 1996 Threespine stickleback nationallicence Electrophoresis nationallicence Genetic differentiation nationallicence Sympatric populations nationallicence Reproductive isolation nationallicence Higuchi Masahito Department of Biology, Faculty of Fisheries, Hokkaido University, 041, Hakodate, Japan aut Goto Akira Department of Biology, Faculty of Fisheries, Hokkaido University, 041, Hakodate, Japan aut Environmental Biology of Fishes Kluwer Academic Publishers; http://www.wkap.nl 47/1(1996-09-01), 1-16 0378-1909 47:1<1 1996 47 10641 https://doi.org/10.1007/BF00002375 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00002375 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Higuchi Masahito Department of Biology, Faculty of Fisheries, Hokkaido University, 041, Hakodate, Japan aut NATIONALLICENCE 700 1- Goto Akira Department of Biology, Faculty of Fisheries, Hokkaido University, 041, Hakodate, Japan aut NATIONALLICENCE 773 0- Environmental Biology of Fishes Kluwer Academic Publishers; http://www.wkap.nl/ 47/1(1996-09-01), 1-16 0378-1909 47:1<1 1996 47 10641 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer