Resource availability and life-history origin affect competitive behavior in territorial disputes
Resource availability and life-history origin affect competitive behavior in territorial disputes
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资源可用性和生活史起源影响领土争端中的竞争行为
DOI：
10.1093/beheco/arv163
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发表时间：
2016
影响因子：
2.4
通讯作者：
Van Leeuwen T
中科院分区：
文献类型：
--
作者：
Van Leeuwen T
部分迁移，即一个种群中的一些个体迁移，而另一些个体保持定居，是一种发生在广泛类群中的现象，但使特定个体倾向于这种或那种策略的因素通常是未知的。褐鳟鱼（萨尔莫trutta）最初在淡水溪流中争夺觅食领地，但有些个体一生都居住在淡水中，而另一些则进行溯河产卵的迁移。由于迁移的驱动力之一是在不同的栖息地的资源获取的相对速率，我们比较了从淡水居民和溯河产卵的父母竞争喂养领土的少年后代的能力;我们还测试了这如何取决于环境的质量以前经历过。棕色鳟鱼来自淡水居民或溯河产卵的父母饲养7个月高，中，或低的食物制度，然后诱导竞争的摄食领域在一个自然的流通道。我们发现，父母的类型有一个显着的优势地位的影响，在领土的相互作用，溯河产卵鱼类的后代占主导地位的大小匹配的淡水居民的后代，但只有当两者都已提出了中等水平的食物供应。结果表明，父母的迁移策略与后代所经历的环境条件相互作用，可能会影响其竞争觅食领土的动机，因此其迁移的概率。
Partial migration, in which some individuals of a population migrate and others remain sedentary, is a phenomenon that occurs across a wide range of taxa, but the factors that predispose particular individuals to one or the other strategy are usually unknown. Brown trout (Salmo trutta) initially compete for feeding territories in freshwater streams, but while some individuals remain resident in fresh water throughout their lives, others undertake an anadromous migration. Because one of the drivers for migration is the relative rates of resource acquisition in different habitats, we compared the ability of juvenile offspring from freshwater-resident and anadromous parents to compete for feeding territories; we also tested how this depended on the quality of the environment previously experienced. Brown trout derived from freshwater-resident or anadromous parents were reared for ~7 months under high-, mid-, or low-food regimes and were then induced to compete for feeding territories in a seminatural stream channel. We found that the parental type had a significant effect on dominance status in territorial interactions, with offspring of anadromous fish being dominant over size-matched offspring of freshwater residents, but only when both had been raised under intermediate levels of food availability. The results suggest that the migration strategy of the parents interacts with the environmental conditions experienced by the offspring to potentially influence its motivation to compete for feeding territories and hence its probability of migration.
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影响因子：
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作者：
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DOI：
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1997
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