Size at maturity of fluvial white-spotted charr, Salvelinus leucomaenis, around the Lake Biwa water system varies with habitat size

作者：Kikko Takeshi^*; Kataoka Yoshitaka; Nishimori Katsuhiro; Fujioka Yasuhiro; Kai Yoshiaki; Nakayama Kouji; Kitakado Toshihide

来源：Ichthyological Research, 2011, 58(4): 370-376.

DOI：10.1007/s10228-011-0229-z

• Size at maturity
• White-spotted charr
• Habitat size
• Phenotypic plasticity
• Habitat fragmentation

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.

• 出版日期2011-11