mirage

Testosterone and Avian Life Histories: Effects of Experimentally Elevated Testosterone on Behavior and Correlates of Fitness in the Dark-Eyed Junco (Junco hyemalis)

DSpace/Manakin Repository

Show simple item record

dc.contributor.author Ketterson, Ellen D.
dc.contributor.author Nolan, Val Jr
dc.contributor.author Wolf, Licia
dc.contributor.author Ziegenfus, Charles
dc.date.accessioned 2014-02-21T19:33:16Z
dc.date.available 2014-02-21T19:33:16Z
dc.date.issued 1992-12
dc.identifier.citation Testosterone and Avian Life Histories: Effects of Experimentally Elevated Testosterone on Behavior and Correlates of Fitness in the Dark-Eyed Junco (Junco hyemalis) Ellen D. Ketterson, Val Nolan Jr., Licia Wolf and Charles Ziegenfus. The American Naturalist , Vol. 140, No. 6 (Dec., 1992) , pp. 980-999. Published by: The University of Chicago Press for The American Society of Naturalists. Article Stable URL: http://www.jstor.org/stable/2462929 en_US
dc.identifier.uri http://www.jstor.org/stable/2462929 en_US
dc.identifier.uri http://hdl.handle.net/2022/17323
dc.description.abstract Hormones influence many aspects of organismal behavior, physiology, and morphol- ogy, and thus hormones may lie at the root of many life-history trade-offs. By manipulating hormones we can create novel phenotypes (i.e., perform phenotypic engineering) and attempt to relate phenotypic variation to fitness. We report the effect of testosterone treatment on parental behavior and vocal behavior of adult male dark-eyed juncos. Testosterone partially suppressed paternal behavior and increased the frequency of song. When we compared treated males and controls for nine potential correlates of fitness (offspring growth and survival to the age of 10 d, condition of females, length of the interval between consecutive nestings, size of subsequent clutches and broods, mate retention within and between breeding seasons, and survival rate), we found no statistical differences. In some measures treated males outperformed controls, but in most the reverse was true. The power of some of our tests was not great enough to detect small differences. At this stage of our investigation, three interpretations of our results seem almost equally probable: (1) a broad range of behavioral phenotypes is selectively neutral in the junco, (2) male parental behavior is beneficial to males only in some years or habitats, or (3) we have yet to measure the correlates of fitness that are most strongly affected by the behavioral changes induced by elevated testosterone en_US
dc.language.iso en_US en_US
dc.publisher American Society of Naturalists en_US
dc.rights CC-BY-NC-SA. By downloading this document or using any information contained therein, you agree to the Creative Commons Attribution-NonCommercial-ShareAlike (CC BY-NC-SA) license terms, which explain terms governing use, creation of derivative research, and requirements for citing the document. en_US
dc.rights.uri http://creativecommons.org/licenses/by-nc-sa/3.0/us/ en_US
dc.title Testosterone and Avian Life Histories: Effects of Experimentally Elevated Testosterone on Behavior and Correlates of Fitness in the Dark-Eyed Junco (Junco hyemalis) en_US
dc.type Article en_US
dc.altmetrics.display false en_US


Files in this item

This item appears in the following Collection(s)

Show simple item record

CC-BY-NC-SA.
By downloading this document or using any information contained therein, you agree to the Creative Commons Attribution-NonCommercial-ShareAlike (CC BY-NC-SA) license terms, which explain terms governing use, creation of derivative research, and requirements for citing the document. CC-BY-NC-SA. By downloading this document or using any information contained therein, you agree to the Creative Commons Attribution-NonCommercial-ShareAlike (CC BY-NC-SA) license terms, which explain terms governing use, creation of derivative research, and requirements for citing the document.

Search IUScholarWorks


Advanced Search

Browse

My Account

Statistics