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Evolution of biological characteristics in landlocked Ayu,Plecoglossus altivelis,in Biliu Reservoir
Author(s): 
Pages: 36-39
Year: Issue:  2
Journal: JOURNAL OF FISHERY SCIENCES OF CHINA

Keyword:  碧流河水库香鱼陆封型种群生物学特性;
Abstract: 1982年碧流河水库建成后,被陆封在水库中的香鱼(Plecoglossus altivelis)经10余年适应后,其生物学特性发生了很大变化。其中一部分个体春季水温上升后暂不进入河道,而留在水库中生活,至7月份才进入河道。与刚陆封时不同,在其植物食性阶段,消化道内有大量浮游植物出现;繁殖期也由9~10月提前到8~9月,性腺发育速度明显加快;个体进一步变小。
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