A diagnosis model of parental care:How parents optimize their provisioning strategy in brood reduction?
作者机构：School of Life SciencesLanzhou UniversityLanzhou CityGansu Province 730000China College of EcologyLanzhou UniversityLanzhou CityGansu Province 730000China
出 版 物：《Current Zoology》 (动物学报（英文版）)
年 卷 期：2023年第69卷第4期
页 面：385-392页
核心收录：
基 金：This work was supported by the National Natural Science Foundation of China(grants 31370417 31572271 31772465 32071491)
主 题：brood reduction parental care provisioning strategy weight gain
摘 要：Altricial birds often display biased preferences in providing parental care for their dependent offspring,especially during food *** this process,such inflexible rules may result in provisioning *** demonstrate how parents optimize their provisioning strategies,we proposed a“diagnosis modelof parental care to posit that parents will undergo a diagnosis procedure to test whether selecting against some particular offspring based on phenotype is an optimal *** tested this model in an asynchronous hatching bird,the Azure-winged Magpie Cyanopica cyanus,based on 10 years of data about demography and parental provisioning *** their higher daily survival rates,core offspring(those hatched on the first day)merits an investment priority compared with their marginal brood mates(those hatched on later days).However,a marginal offspring also merited a priority if it displayed greater weight gain than the expected value at the early post-hatching *** could detect such a marginal offspring via a diagnosis strategy,in which they provisioned the brood at the diagnosis stage by delivering food to every nestling that begged,then biased food toward high-value nestlings at the subsequent decision stage by making a negative response to the begging of low-value *** this provisioning strategy,the growth performance of a nestling became a more reliable indicator of its investment value than its hatching order or competitive *** findings provide evidence for this“diagnosis model of parental carewherein parents use a diagnosis method to optimize their provisioning strategy in brood reduction.
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