Female-female aggression is linked to food defence in a poison frog
Female-female aggression is linked to food defence in a poison frog
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雌性之间的攻击行为与毒蛙的食物防御有关
DOI：
10.1111/eth.12848
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发表时间：
2019
期刊：
影响因子：
1.7
通讯作者：
Rodríguez A.
中科院分区：
文献类型：
--
作者：
Pröhl H;Scherm M.G;Meneses S;Dreher C.E;Meuche I;Rodríguez A.
领地动物对栖息地的占用预计取决于关键资源的分配。关于女性领地性的知识很少，但有人建议将其作为保护有限生殖资源的机制。先前的一项研究表明，草莓毒蛙 Oophaga pumilio 的雌性性内攻击行为与领地行为有关，这是一种具有复杂母性护理的昼夜警戒物种。在这里，我们研究了对生殖重要的资源的空间分布与女性分布和行为之间的联系。我们在哥斯达黎加的自然栖息地观察了焦点雌性，并记录了网格系统中生态预测变量的分布。我们使用这些数据来计算活动范围和领地大小，并通过计算空间栖息地占用模型将雌性栖息地的使用与潜在资源的分布联系起来。尽管我们发现雌性占据了很大的活动范围，但它们仅在其活动范围的一小部分（这里称为核心区域）内对其他雌性具有高度攻击性。在生态因素中，蚂蚁（青蛙的主要食物）的持续丰富、落叶层的存在以及蝌蚪适宜的饲养场所预测了雌性的场所占用模式。核心区域每个网格的蚂蚁数量是其他雌性栖息地的两倍。我们的结果表明，雌性间隔行为主要是由其主要食物资源的空间分布驱动的，但藏身之处（落叶）和蝌蚪饲养场所也发挥了作用。对蚂蚁数量持续居高不下的地区进行防御可能是相关的，因为对于这种长期繁殖的物种来说，产卵和母性护理的要求非常高。关于资源防御和母性关怀之间的联系，雌性草莓毒蛙的繁殖策略类似于雌性小型哺乳动物的繁殖策略，包括同性竞争食物以及对生产和抚养幼崽的高投资。
Habitat occupancy by territorial animals is expected to depend on the distribution of critical resources. Knowledge on female territoriality is scarce, but it has been suggested as a mechanism to defend limited resources for reproduction. A previous study showed female intrasexual aggression to be associated with territorial behaviour in the strawberry poison frogOophaga pumilio, a diurnal aposematic species with complex maternal care. Here, we investigate the link between spatial distribution of resources important for reproduction and female distribution and behaviour. We observed focal females in their natural habitat in Costa Rica, and recorded the distribution of ecological predictor variables in a grid system. We used the data for calculating home range and territory sizes and for connecting female habitat use to the distribution of potential resources by computing spatial habitat occupancy models. Even though we found females to occupy large home ranges, they were highly aggressive towards other females only inside a small part of their home range, here termed core area. Among the ecological factors, the sustained abundance of ants (main food item of the frogs), the presence of leaf litter and suitable rearing sites for tadpoles predicted female site occupancy patterns. The number of ants per grid was twice as high in the core areas compared to the rest of the female home ranges. Our results suggest that female spacing behaviour is principally driven by the spatial distribution of its main food resource, but that hiding places (leaf litter) and tadpole‐rearing sites also play a role. The defence of areas with sustainably high abundance of ants could be relevant, as egg production and maternal care are energetically highly demanding in this prolonged‐breeding species. Regarding the link between resource defence and maternal care, the reproductive strategy of female strawberry poison frogs resembles that of the females of small mammals comprising same‐sex competition for food and high investment in producing and rearing young.
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影响因子：
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作者：
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影响因子：
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作者：
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影响因子：
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作者：
F. H. Test
通讯作者：
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DOI：
--
发表时间：
2011
期刊：
Evolution; international journal of organic evolution
影响因子：
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作者：
Andreas Rudh;B. Rogell;O. Håstad;A. Qvarnström
通讯作者：
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