Brian R Johnson
Brian R Johnson
Honeybees exhibit two patterns of organization of work. In the spring and summer, division of labor is used to maximize growth rate and resource accumulation, while during the winter, worker survivorship through the poor season is paramount...
The effects of young brood on the foraging behavior of two strains of honey bees (Apis mellifera) [0.03%]
子房室内年轻幼虫对两种意蜂（Apis mellifera）采集行为的影响
Jennifer M Tsuruda,Robert E Page
Jennifer M Tsuruda
Honey bee foragers specialize on collecting pollen and nectar. Pollen foraging behavior is modulated by at least two stimuli within the nest: the presence of brood pheromone and young larvae and the quantity of stored pollen. Genetic variat...
Females alter their song when challenged in a sex-role reversed bird species [0.03%]
一种性别角色反转的鸟类在受到挑战时会改变叫声
Nicole Geberzahn,Wolfgang Goymann,Christina Muck et al.
Nicole Geberzahn et al.
Birdsong serves to attract mates and to deter territorial rivals. Even though song is not restricted to males, this dual function has almost exclusively been demonstrated for male song. To test the generality of hypotheses on birdsong, we i...
Lars W Clement,Stephan C W Köppen,Willi A Brand et al.
Lars W Clement et al.
Mutualisms can be exploited by parasites-species that obtain resources from a partner but provide no services. Though the stability of mutualisms in the presence of such parasites is under intensive investigation, we have little information...
Androgen and glucocorticoid levels reflect seasonally occurring social challenges in male redfronted lemurs (Eulemur fulvus rufus) [0.03%]
雄性红fronted狐猴体内的雄激素和皮质醇水平反映了其季节性的社会挑战效应
Julia Ostner,Peter Kappeler,Michael Heistermann
Julia Ostner
Intense reproductive competition and social instability are assumed to increase concentrations of glucocorticoids and androgens in vertebrates, as a means of coping with these challenges. In seasonally breeding redfronted lemurs (Eulemur fu...
Paternity alone does not predict long-term investment in juveniles by male baboons [0.03%]
父系认同本身不能预测雄性狒狒对幼仔的长期投入行为
Liza R Moscovice,Marlies Heesen,Anthony Di Fiore et al.
Liza R Moscovice et al.
Adult male chacma baboons (Papio hamadryas ursinus) form preferential associations, or friendships, with particular lactating females. Males exhibit high levels of affiliative contact with their friends' infants and defend them from potenti...
Advertisement-call modification, male competition and female preference in the bird-voiced treefrog Hyla avivoca [0.03%]
鸣鸟树蛙(Hyla avivoca)的求偶广告叫声修改、雄性竞争和雌性偏好
Carlos César Martínez-Rivera,H Carl Gerhardt
Carlos César Martínez-Rivera
Senders and receivers influence dynamic characteristics of the signals used for mate attraction over different time scales. On a moment-to-moment basis, interactions among senders competing for a mate influence dynamic characteristics, wher...
Oded Berger-Tal,Shomen Mukherjee,Burt P Kotler et al.
Oded Berger-Tal et al.
Theory states that an optimal forager should exploit a patch so long as its harvest rate of resources from the patch exceeds its energetic, predation, and missed opportunity costs for foraging. However, for many foragers, predation is not t...
Lydia H Beaudrot,Sonya M Kahlenberg,Andrew J Marshall
Lydia H Beaudrot
Infanticide is widespread among mammals, is particularly common in primates, and has been shown to be an adaptive male strategy under certain conditions. Although no infanticides in wild orangutans have been reported to date, several author...
Daniel J van der Post,Bas Ursem,Paulien Hogeweg
Daniel J van der Post
We study how learning is shaped by foraging opportunities and self-organizing processes and how this impacts on the effects of "copying what neighbors eat" on multiple timescales. We use an individual-based model with a rich environment, wh...