WHEN SHOULD AVIAN PARENTS DIFFERENTIALLY PROVISION SONS AND DAUGHTERS
WHEN SHOULD AVIAN PARENTS DIFFERENTIALLY PROVISION SONS AND DAUGHTERS
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DOI：
10.1086/285068
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发表时间：
1990-05-01
影响因子：
2.9
通讯作者：
STAMPS, JA
中科院分区：
文献类型：
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作者：
STAMPS, JA
由于缺乏关于幼鸟行为、供给、生长和发育的性别差异的数据，这篇论文必然是推测的。对这一话题的明确治疗将不得不等到有更多的经验数据可用。然而，在这一点上，很明显，除了相对的身体大小之外，其他因素也会影响年轻的雄鸟和雌鸟的食物需求和供应率。摄食量和生长率之间的关系可能会受到许多因素的影响，在具有性别大小二型性的物种中，这些功能关系对于年轻的雄性和雌性来说可能是不同的。几个假说预测，在性别大小的二态物种中，两性的进食相对平等，或者在性别大小单一的物种中，某一性别的成员优先进食。这些假设包括兄弟姐妹之间竞争父母的供应，独立前后年轻人之间的竞争，以及独立后紧随其后的性别偏见的分散。此外，还有人建议，同龄的雄性和雌性幼崽可能会将食物分配给生长和发育的不同组成部分，这是由于不同的发育时间表或为提高竞争能力的结构的早期成熟而选择的结果。因此，鸟类性别歧视的供应问题似乎是进一步讨论和实证研究的沃土。
Given the scarcity of data on sex differences in the behavior, provisioning, growth, and development of young birds, this paper is necessarily speculative. Definitive treatments of the topic will have to wait until more empirical data are available. However, at this point, it is clear that factors besides relative body size can affect the food requirements and provisioning rates of young male and female birds. Relationships between food intake and growth rates can be affected by a number of factors, and in species with sexual size dimorphism, these functional relationships are probably different for young males and females. Several hypotheses predict relatively egalitarian feeding of both sexes in sexually size-dimorphic species or preferential feeding of the members of one sex in sexually size-monomorphic species. These include hypotheses related to competition among the siblings for parental provisioning, competition between young around the time of independence, and sex-biased dispersal in the period immediately following independence. In addition, there are suggestions that male and female young of the same age might allocate food to different components of growth and development, as a result of different developmental schedules or of selection for the early maturation of structures that enhance competitive ability. Hence, the topic of sex-biased provisioning in birds would seem to be a fertile field for further discussion and empirical studies.