Predator avoidance behaviour in wild and hatchery-reared brown trout: the role of experience and domestication
Predator avoidance behaviour in wild and hatchery-reared brown trout: the role of experience and domestication
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DOI：
10.1111/j.1095-8649.2003.00267.x
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发表时间：
2003-12-01
影响因子：
2
通讯作者：
Nicieza, AG
中科院分区：
文献类型：
--
作者：
Alvarez, D;Nicieza, AG
来自自然种群的幼鳟鱼Salmo trutta通过增加对避难所的使用来应对食鱼褐鳟的存在。第二代孵化鱼和在孵化场条件下饲养的野生鱼后代对捕食风险不敏感。野生褐鳟和孵化场褐鳟的活动模式也不同。第二代孵化鱼不论风险高低，主要在白天活动。然而，野生鱼类在有捕食者的情况下会转向夜间活动。这些发现强调了驯化在削弱行为防御方面的潜在作用。他们支持这样一种观点，即野生和家养个体之间的行为差异可能源于对捕食风险反应能力降低的直接或间接选择过程，或者由于缺乏与捕食者的经验。(C) 2003年不列颠群岛渔业协会
Juvenile brown trout Salmo trutta from natural populations reacted to the presence of piscivorous brown trout by increasing the use of refuges. In contrast, second-generation hatchery fish and the offspring of wild fish raised under hatchery conditions were insensitive to predation risk. The diel pattern of activity also differed between wild and hatchery brown trout. Second-generation hatchery fish were predominantly active during daytime regardless of risk levels. Wild fish, however, showed a shift towards nocturnal activity in the presence of predators. These findings emphasize the potential role of domestication in weakening behavioural defences. They support the idea that the behavioural divergence between wild and domesticated individuals can arise from a process of direct or indirect selection on reduced responsiveness to predation risk, or as a lack of previous experience with predators. (C) 2003 The Fisheries Society of the British Isles