The effect of brood size and age on partial filial cannibalism in the scissortail sergeant
The effect of brood size and age on partial filial cannibalism in the scissortail sergeant
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幼仔大小和年龄对剪尾军士部分孝顺同类相食的影响
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
A. Manica
中科院分区：
文献类型：
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作者：
A. Manica
在现场发现的剪尾军士阿布德杜夫·六条鱼的大小范围内，食人卵的数量与总的孵化大小之间没有相关性。非常小的鱼群完全被吃掉了。在操纵实验中，雄性被提供三种标准大小的幼崽之一：在两个极端和在自然产生的幼崽范围的中间。窝大小对部分自相残杀没有影响，但亲代努力随着窝大小的增加而增加。田间相关和操纵实验表明，就当前繁殖成功而言，食人成本随着孵化规模的增加而显着降低。与预期相反的是，男性的体型和食人率之间没有关系。无论是从田间相关性还是从操控实验中都没有发现对年轻卵的偏好。在操纵实验中，在亲代阶段的开始，雄性被提供了相同数量的幼卵和老卵。
Within the size range found in the field for the scissortail sergeant Abudefduf sexfasciatus, there was no correlation between the number of cannibalized eggs and total brood size. Very small broods were fully cannibalized. In a manipulation experiment, males were provided with broods of one of three standardized sizes: at the two extremes and in the middle of the range of naturally occurring broods. Brood size had no effect on partial filial cannibalism, but parental effort increased with increasing brood size. Field correlates and the manipulation experiment showed that the cost of cannibalism in terms of current reproductive success decreased significantly with increasing brood size. Contrary to expectations, there was no relationship between male size and the incidence of cannibalism. No preference for younger eggs was found either from field correlates or from a manipulative experiment in which males were provided with an equal number of young and old eggs at the beginning of the parental phase.
父母照顾的演变
DOI：
10.1093/acprof:oso/9780199692576.003.0016
发表时间：
2012
期刊：
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影响因子：
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作者：
Kölliker M
通讯作者：
Kölliker M