Developmental stress affects song learning but not song complexity and vocal amplitude in zebra finches [0.03%]
发育压力影响斑马雀歌曲学习但不影响歌曲复杂性和鸣叫幅度
Henrik Brumm,Sue Anne Zollinger,Peter J B Slater
Henrik Brumm
Several recent studies have tested the hypothesis that song quality in adult birds may reflect early developmental conditions, specifically nutritional stress during the nestling period. Whilst all of these earlier studies found apparent li...
Aging and demographic plasticity in response to experimental age structures in honeybees (Apis mellifera L) [0.03%]
人工调控意大利蜂（Apis mellifera L.）种群年龄结构对其寿命和弹性的效应
Olav Rueppell,Robyn Linford,Preston Gardner et al.
Olav Rueppell et al.
Honeybee colonies are highly integrated functional units characterized by a pronounced division of labor. Division of labor among workers is mainly age-based, with younger individuals focusing on in-hive tasks and older workers performing t...
Mark E Laidre,Sandra L Vehrencamp
Mark E Laidre
In this commentary, we discuss recent experiments on the reliability of bird song as a signal of aggressive intent during territorial conflicts. We outline relevant theoretical views on honest signaling, highlighting the vulnerability handi...
Sex-biased lactational duration in a human population and its reproductive costs [0.03%]
人口中哺乳时间的性别偏向及其生殖成本
S W Margulis,J Altmann,C Ober
S W Margulis
The authors tested the proposition that among humans (1) differences in lactational duration result in differences in costs of reproduction even under rich nutritional conditions; and (2) elimination of factors postulated to favor male-bias...
Kipsigis women's preferences for wealthy men: evidence for female choice in mammals? [0.03%]
基普西吉斯女性偏爱富有的男性：哺乳动物中择偶行为的证据？
M B Mulder
M B Mulder
Factors affecting the choice of a male mate in a polygynous society are examined using data on the Kipsigis people of Kenya. "This paper has two aims: first, to test whether Kipsigis women prefer wealthy men by examining the sequence of mar...
Is provisioning rate of parents and helpers influenced by the simulated presence of novel individuals? [0.03%]
陌生个体存在下父母及助手的资源配置率受影响吗？
Abstract: Cooperative behaviour is widespread in animals and is likely to be the result of multiple selective pressures. A contentious hypothesis is that helping enhances the probability of obtaining a sexual partner (i.e...