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首页> 外文期刊>Ethology >Fixed Rejection Responses to Single and Multiple Experimental Parasitism in Two Fringilla Hosts of the Common Cuckoo
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Fixed Rejection Responses to Single and Multiple Experimental Parasitism in Two Fringilla Hosts of the Common Cuckoo

机译：固定排斥反应对常见杜鹃的两个Fringilla宿主中的单个和多个实验性寄生虫。

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tPrevious studies have shown that the tendency to reject parasitic eggs among certain hosts is strongly dependent on the degree of similarity with own eggs, whereas other conditional cues do not affect rejection decisions. This paper examines whether two such hosts, the closely related brambling and chaffinch, show a different tendency to reject parasitic eggs if they are multiply parasitized. Some individuals were experimentally parasitized with both a non-mimetic and a low-intermediate contrasting egg in the same breeding attempt. The non-mimetic egg was rejected almost without exception. In chaffinches, the low-intermediate contrasting egg was introduced shortly after rejection of the non-mimetic egg whereas in bramblings, both eggs were introduced simultaneously. A control group consisted of individuals that were parasitized with one low-intermediate contrasting egg. There was no significant difference in the tendency to reject the low-medium contrasting eggs between the experimental and control group in any of the species, implying that the same acceptance threshold is applied to each parasitic egg independently. Moreover, the rejection rate of non-mimetic eggs was high (>90%) regardless of whether the egg was introduced alone or together with a low-medium contrasting egg. The results are discussed in relation to recent studies with great reed warblers Acrocephalus arundinaceus that obtained contrasting results in similar experimental designs. The different degrees of flexibility displayed by Fringilla and great reed warbler hosts are likely to reflect differences in both the perception and action component of the recognition system.
机译：t先前的研究表明，某些宿主拒绝寄生卵的趋势在很大程度上取决于与自身卵的相似程度，而其他条件暗示则不会影响拒绝的决定。本文研究了两个类似的寄主，即密切相关的花鸡和花鸡，是否表现出不同的拒绝寄生卵的趋势，如果它们被多重寄生的话。在相同的繁殖尝试中，一些个体在实验上被寄生了一个非模拟卵和一个低中度对比卵。非模拟蛋几乎毫无例外地被拒绝。在燕雀中，在拒绝非模拟卵后不久就引入了低中度对比卵，而在脆皮鸡中，同时引入了两种卵。对照组由被一个低中度对比卵寄生的个体组成。在任何物种的实验组和对照组之间，拒绝中低对比度卵子的趋势均无显着差异，这意味着将相同的接受阈值独立应用于每个寄生卵。此外，无论是单独引入鸡蛋还是与低对比度的对比鸡蛋一起引入，非模拟鸡蛋的拒绝率都很高（> 90％）。该结果是与最近与大型芦苇Acrocephalus arundinaceus的研究相关的讨论，该研究在类似的实验设计中获得了相反的结果。 Fringilla和伟大的芦苇鸣鸟寄主所表现出的不同程度的灵活性可能反映了识别系统在感知和动作方面的差异。

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