Agonistic behaviour of wild eels and depressed survival and growth of farmed eels in mixed rearing experiments
Agonistic behaviour of wild eels and depressed survival and growth of farmed eels in mixed rearing experiments
复制标题
混合饲养实验中野生鳗鱼的竞争行为和养殖鳗鱼的生存和生长受到抑制
DOI：
10.1111/jfb.15047
复制
发表时间：
2022
影响因子：
2
通讯作者：
Kaifu Kenzo
中科院分区：
文献类型：
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作者：
Wakiya Ryoshiro;Itakura Hikaru;Imayoshi Yuji;Kaifu Kenzo
为了有助于改善鳗鱼放养程序，对与野生个体一起饲养的养殖日本鳗鱼的生存、生长和行为进行了评估，以了解养殖和放养鳗鱼与野生鳗鱼可能发生的情况。进行了两项实验来评估（a）野生鳗鱼的存在对实验池塘中养殖鳗鱼的生存和生长的影响，以及（b）放置在小水箱中的野生鳗鱼和养殖鳗鱼之间的行为差异。在存活和生长实验中，与没有野生鳗鱼饲养的养殖鳗鱼（对照）相比，观察到与野生鳗鱼一起饲养的养殖鳗鱼的存活率和生长率显着降低。在行为观察中，作者观察到避难所的占用率明显更高，野生鳗鱼被咬的频率也更高，这表明野生鳗鱼相对于养殖鳗鱼具有主导地位。由于目前实验中使用的野生鳗鱼和养殖鳗鱼属于同一遗传种群，这些差异是在水产养殖过程中的一代内产生的。
To contribute to improving eel stocking procedures, the survival, growth and behaviour of farmed Japanese eels reared together with wild individuals were evaluated to learn about possible encounters of farmed‐ and stocked eels with wild eels. Two experiments were conducted to evaluate the (a) effect of the presence of wild eels on survival and growth of farmed eels in experimental ponds and (b) behavioural differences between wild and farmed eels placed in a small tank. In the survival and growth experiment, significantly lower survival and growth rates of farmed eels reared with wild eels were observed compared with farmed eels reared without wild eels (control). In the behavioural observations, the authors observed significantly higher occupation rates of a refuge and more frequent biting for wild eels, indicating a dominance of wild eels over farmed eels. Because wild and farmed eels used in the current experiments belong to the same genetic population, these differences resulted within one generation through the aquaculture rearing process.