The role of testosterone in male downy woodpeckers in winter home range use, mate interactions and female foraging behaviour.
The role of testosterone in male downy woodpeckers in winter home range use, mate interactions and female foraging behaviour.
复制标题
睾丸激素在雄性绒啄木鸟冬季活动范围使用、交配互动和雌性觅食行为中的作用。
DOI：
10.1016/j.anbehav.2005.07.012
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发表时间：
2006
期刊：
影响因子：
2.5
通讯作者：
Wingfield,JohnC
中科院分区：
文献类型：
--
作者：
Kellam,JamesS;Lucas,JeffreyR;Wingfield,JohnC
睾酮（T）在鸟类中的作用的研究通常集中在繁殖期间雄性的性行为或攻击行为，但非迁徙物种的雄性可能在繁殖之前很久就投资于配偶和领土，T在促进非繁殖季节行为中的影响知之甚少。我们给自由生活的男性绒毛啄木鸟，毛啄木鸟，T-植入物在冬季，以确定是否升高水平的T增加男性的能力，专门占用领土为基础的资源，以及是否升高的T加强了男性的投资在现有的对债券关系。我们还探讨了雌性的觅食效率可能会受到影响，她的配偶的行为，如果他有升高的T。我们发现控制和T植入男性之间的差异不大，就家庭范围的排他性。令人惊讶的是，男性男性显示率显着低于T植入男性比对照组。关于男性-女性的相互作用，T-植入男性经历了高入侵率从其他男性保持更频繁的空间关联与他们的伴侣，这表明T促进男性的行为，可以限制配偶的访问其他雄性鸟类。T雄性的雌性配偶表现出觅食率降低，但由于处理组之间的雄性-雌性攻击相似，因此这种降低的原因尚不清楚。结果表明，外源T在冬季影响雄性啄木鸟的各种行为，和近距离影响对债券的维护在冬季可能是一个富有成效的途径，为今后的研究。
Studies of the role of testosterone (T) in birds have typically focused on sexual or aggressive behaviours of males during the breeding period, but males of nonmigratory species may invest in mate and territory long before breeding, and the influence of T in facilitating nonbreeding-season behaviours is poorly understood. We gave free-living male downy woodpeckers, Picoides pubescens, T-implants during the winter to determine whether elevated levels of T increased a male's ability to exclusively occupy territory-based resources, and whether elevated T strengthened a male's investment in an existing pair bond relationship. We also explored how a female's foraging efficiency might be affected by her mate's behaviour if he had elevated T. We found little difference between control and T-implanted males with regard to home range exclusivity. Surprisingly, male–male display rates were significantly lower in T-implanted males than in controls. Regarding male–female interactions, T-implanted males that experienced high incursion rates from other males maintained more frequent spatial association with their mate, suggesting that T facilitates male behaviours that could restrict the mate's access to other male birds. Female mates of T-males showed reduced foraging rates, but because male–female aggression was similar between treatment groups, the cause for this reduction is unknown. The results indicate that exogenous T during winter affects a variety of behaviours in male woodpeckers, and proximate influences on pair bond maintenance in winter may be a fruitful avenue for future research.