| Eutrophication and predation risk interact to affect sexual trait expression and mating success. | |
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MedLine Citation:
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PMID: 22380434 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Sexual traits are especially sensitive to low food resources. Other environmental parameters (e.g., predation) should also affect sexual trait expression by favoring investment in viability traits rather than sexual traits. We know surprisingly little about how predators alter investment in sexual traits, or how predator and resource environments interact to affect sexual trait investment. We explored how increasing phosphorous (P) availability, at a level mimicking cultural eutrophication, affects the development of sexual, nonsexual, and viability traits of amphipods in the presence and absence of predators. Sexual traits and growth were hypersensitive to low P compared to nonsexual traits. However, a key sexual trait responded to low P only when predator cues were absent. Furthermore, investment trade-offs between sexual traits and growth only occurred when P was low. The phenotypic changes caused by predator cues and increased P availability resulted in higher male mating success. Thus, eutrophication not only affects sexual trait expression but also masks the trade-off between traits with similar P demand. Sensitivity of sexually selected traits to changes in P, combined with the important roles these traits play in determining fitness and driving speciation, suggests that human-induced environmental change can greatly alter the evolutionary trajectories of populations. |
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Authors:
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Rickey D Cothran; Andy R Stiff; Punidan D Jeyasingh; Rick A Relyea |
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Publication Detail:
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Type: Journal Article Date: 2011-10-28 |
Journal Detail:
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Title: Evolution; international journal of organic evolution Volume: 66 ISSN: 1558-5646 ISO Abbreviation: Evolution Publication Date: 2012 Mar |
Date Detail:
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Created Date: 2012-03-02 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0373224 Medline TA: Evolution Country: United States |
Other Details:
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Languages: eng Pagination: 708-19 Citation Subset: IM |
Copyright Information:
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© 2011 The Author(s). Evolution© 2011 The Society for the Study of Evolution. |
Affiliation:
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Department of Biological Sciences and Pymatuning Laboratory of Ecology, University of Pittsburgh, 4249 Fifth Ave., Pittsburgh, Pennsylvania15260 E-mail: rdc28@pitt.edu Department of Zoology, Oklahoma State University, 501 Life Sciences West, Stillwater, Oklahoma 74078. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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