Cor Dijkstra,Bernd Riedstra,Arjan Dekker et al.
Cor Dijkstra et al.
When the reproductive value of male and female offspring varies differentially, parents are predicted to adjust the sex ratio of their offspring to maximize their fitness (Trivers and Willard, Science 179:90-92, 1973). Two factors have been...
Adult female hamsters avoid interspecific mating after exposure to heterospecific males [0.03%]
暴露于异种雄性后避开异种交配行为的成年雌仓鼠
Javier Delbarco-Trillo,M E McPhee,Robert E Johnston
Javier Delbarco-Trillo
When females mate with a heterospecific male, they do not usually produce viable offspring. Thus, there is a selective pressure for females to avoid interspecific mating. In many species, females innately avoid heterospecific males; females...
David A Tanner,P Kirk Visscher
David A Tanner
The waggle dance of the honey bee is used to recruit nest mates to a resource. Dancer bees, however, may indicate many directions within a single dance bout; we show that this scatter in honey bee dances is strongly dependent on the sensory...
Petra Quillfeldt,Christian C Voigt,Juan F Masello
Petra Quillfeldt
Pelagic seabird populations can use several discrete wintering areas, but it is unknown if individuals use the same wintering area year after year. This would have consequences for their population genetic structure and conservation. We her...
Differential deposition of antimicrobial proteins in blue tit (Cyanistes caeruleus) clutches by laying order and male attractiveness [0.03%]
蓝额山雀(Cyanistes caeruleus)巢内的抗菌蛋白沉积物的差异性分布由产卵顺序和雄鸟的魅力决定
Liliana D&#x;Alba,Matthew D Shawkey,Peter Korsten et al.
Liliana D&#x;Alba et al.
Female birds can influence offspring fitness by varying the relative quantities of egg components they deposit within and between clutches. Antimicrobial proteins (lysozyme, ovotransferrin, and avidin) are significant components of the avia...
Johanneke E Oosten,Carin Magnhagen,Charlotte K Hemelrijk
Johanneke E Oosten
Most studies of animal personality attribute personality to genetic traits. But a recent study by Magnhagen and Staffan (Behav Ecol Sociobiol 57:295-303, 2005) on young perch in small groups showed that boldness, a central personality trait...
Ecological and hormonal correlates of antipredator behavior in adult Belding's ground squirrels (Spermophilus beldingi) [0.03%]
Belding地松鼠(Spermophilus beldingi)的天敌防御行为的生态和激素相关性研究
Jill M Mateo
Jill M Mateo
Predator-prey relationships provide an excellent opportunity to study coevolved adaptations. Decades of theoretical and empirical research have illuminated the various behavioral adaptations exhibited by prey animals to avoid detection and ...
No evidence for selective follicle abortion underlying primary sex ratio adjustment in pigeons [0.03%]
鸽子初次性比率调整并非基于选择性卵泡凋亡的证据
Vivian C Goerlich,Cor Dijkstra,Ton G G Groothuis
Vivian C Goerlich
Primary sex ratio adjustment in birds has been extensively studied, yet the underlying physiological mechanisms are far from understood. Avian females are the heterogametic sex (ZW), and the future sex of the offspring is determined at chro...
Vigilance of mustached tamarins in single-species and mixed-species groups-the influence of group composition [0.03%]
须鼻猴的警戒行为：单个物种群体与混合物种群体的影响
Mojca Stojan-Dolar,Eckhard W Heymann
Mojca Stojan-Dolar
Species that participate in mixed-species groups (MSG) may have complementary roles in antipredator strategies. We studied vigilance in mustached tamarins (Saguinus mystax), small arboreal primates that form stable mixed-species groups with...
Habitat-related birdsong divergence: a multi-level study on the influence of territory density and ambient noise in European blackbirds [0.03%]
与栖息地相关的鸣唱分歧：关于欧洲黑鸟领地密度及背景噪声影响的多层次研究
Erwin A P Ripmeester,Jet S Kok,Jacco C van Rijssel et al.
Erwin A P Ripmeester et al.
Song plays an important role in avian communication and acoustic variation is important at both the individual and population level. Habitat-related variation between populations in particular can reflect adaptations to the environment accu...