Size at maturity of fluvial white-spotted charr, <Emphasis Type="Italic">Salvelinus leucomaenis</Emphasis>, around the Lake Biwa water system varies with habitat size |
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| Authors: | Takeshi Kikko Yoshitaka Kataoka Katsuhiro Nishimori Yasuhiro Fujioka Yoshiaki Kai Kouji Nakayama Toshihide Kitakado |
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| Institution: | (1) Samegai Trout Farm, Shiga Prefectural Fisheries Experimental Station, Kaminyu, Maibara Shiga, 521-0033, Japan;(2) Shiga Prefectural Fisheries Experimental Station, 2138-3 Hassaka, Hikone Shiga, 522-0057, Japan;(3) Maizuru Fisheries Research Station, Field Science Education and Research Center, Kyoto University, Nagahama, Maizuru Kyoto, 625-0086, Japan;(4) Field Science Education and Research Center, Kyoto University, Kyoto 606-8502, Japan;(5) Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Konan, Minato Tokyo, 108-8477, Japan;(6) Present address: Shiga Prefectural Fisheries Experimental Station, 2138-3 Hassaka, Hikone Shiga, 522-0057, Japan |
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| Abstract: | Size at maturity of fluvial white-spotted charr, Salvelinus leucomaenis, was studied in small headwater tributaries of nine rivers around the Lake Biwa water system, Japan. Threshold size at maturity
in both sexes showed significant positive relationships with water discharge, indicating that smaller threshold sizes at maturity
of fluvial white-spotted charr occurred in smaller habitats. These results provide a link between size at maturity and habitat
size and have important implications for the management of both habitats and white-spotted charr populations. |
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