Abstract:
:Testosterone (T) is often referred to as the "male hormone," but it can influence aggression, parental behavior, and immune function in both males and females. By experimentally relating hormone-induced changes in phenotype to fitness, it is possible to ask whether existing phenotypes perform better or worse than alternative phenotypes, and hence to predict how selection might act on a novel or rare phenotype. In a songbird, the dark-eyed junco (Junco hyemalis), we have examined the effects of experimentally elevated T in females on fitness-related behaviors such as parental care. In this study, we implanted female juncos with exogenous T and examined its effect on fitness (survival, reproduction, and extra-pair mating) to assess whether T-altered phenotypes would prove to be adaptive or deleterious for females. Experimental elevation of T decreased the likelihood that a female would breed successfully, and T-implanted females had lower total reproductive success at every stage of the reproductive cycle. They did not, however, differ from control females in fledgling quality, extra-pair offspring production, survival, or reproduction in the following year. Previous work in this system has shown that experimental elevation of T in males alters behavior and physiology and decreases survival but increases the production of extra-pair offspring, leading to higher net fitness relative to control animals. Our results suggest that increased T has divergent effects on male and female fitness in this species, and that prevailing levels in females may be adaptive for them. These findings are consistent with sexual conflict.
journal_name
Horm Behavjournal_title
Hormones and behaviorauthors
Gerlach NM,Ketterson EDdoi
10.1016/j.yhbeh.2013.03.005subject
Has Abstractpub_date
2013-05-01 00:00:00pages
782-90issue
5eissn
0018-506Xissn
1095-6867pii
S0018-506X(13)00066-4journal_volume
63pub_type
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journal_title:Hormones and behavior
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journal_title:Hormones and behavior
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journal_title:Hormones and behavior
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journal_title:Hormones and behavior
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pub_type: 杂志文章
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journal_title:Hormones and behavior
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journal_title:Hormones and behavior
pub_type: 杂志文章
doi:10.1016/j.yhbeh.2008.09.008
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journal_title:Hormones and behavior
pub_type: 杂志文章,评审
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journal_title:Hormones and behavior
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更新日期:1989-06-01 00:00:00
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journal_title:Hormones and behavior
pub_type: 杂志文章
doi:10.1016/j.yhbeh.2004.07.001
更新日期:2004-12-01 00:00:00
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pub_type: 杂志文章
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journal_title:Hormones and behavior
pub_type: 杂志文章
doi:10.1016/j.yhbeh.2010.05.006
更新日期:2010-11-01 00:00:00
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journal_title:Hormones and behavior
pub_type: 杂志文章
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journal_title:Hormones and behavior
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journal_title:Hormones and behavior
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journal_title:Hormones and behavior
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更新日期:2008-09-01 00:00:00
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journal_title:Hormones and behavior
pub_type: 杂志文章
doi:10.1016/j.yhbeh.2014.02.004
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journal_title:Hormones and behavior
pub_type: 杂志文章
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更新日期:2008-03-01 00:00:00
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journal_title:Hormones and behavior
pub_type: 杂志文章
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更新日期:2019-06-01 00:00:00
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journal_title:Hormones and behavior
pub_type: 杂志文章
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更新日期:1993-09-01 00:00:00
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journal_title:Hormones and behavior
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journal_title:Hormones and behavior
pub_type: 杂志文章
doi:10.1006/hbeh.1993.1038
更新日期:1993-12-01 00:00:00
abstract::A series of six experiments was performed to examine the influence of postnatal-gonadal-hormone exposure on home-cage activity in Rockland-Swiss albino mice. Intact females were more active than their male counterparts and gonadectomy in adulthood, while reducing levels of the behavior in both sexes, did not eliminate...
journal_title:Hormones and behavior
pub_type: 杂志文章
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