克氏原螯虾幼体及亚成体对中华鳖的趋避行为

【背景】在我国，克氏原螯虾是一种外来入侵水生生物，已经对入侵地的生态环境造成严重的破坏。【方法】在Y形水迷宫中，研究有经验和无经验的幼体及亚成体克氏原螯虾对中华鳖的趋避行为。【结果】幼虾无论是否有经验都会显著回避中华鳖，降低外倾性；而亚成体虾对中华鳖的反应不及幼虾灵敏。【结论与意义】2种不同发育阶段的外来入侵物种克氏原螯虾均会回避土著物种中华鳖，为外来入侵生物防治和动物行为学及相关研究提供了参考。

Behavioral responses of juvenile and subadult crayfishes （Procambarus clarkii） to its predator,the soft-shelled turtle Trionyx sinensis

Background]The red swamp crayfish （Procambarus clarkii G. ） is an invasive aquatic organism to China, and has caused lot damage to the freshwater ecosystems in China. It has few predators, but the native soft-shelled turtle Trionyx sinensis is a potential predator. Method ] This research aims at discovering the behavioral response of juvenile and subaduh crayfishes to the softshelled turtle. Experiments were conducted in a ＂Y＂-maze under laboratory conditions. Result ] Juvenile crayfish, experienced or not, showed a strong aversion to the turtle; subadult crayfish were less sensitive than the juveniles. Conclusion and significance ] The red swamp crayfish demonstrated avoidance to the soft-shelled turtle. Further tests should be performed to examine the behav- ioural reactions of this invasive species to its potential redators.