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Article: Heritability of corticosterone response and changes in life history traits during selection in the zebra finch

TitleHeritability of corticosterone response and changes in life history traits during selection in the zebra finch
Authors
KeywordsZebra finch
Heritability
Corticosterone
Artificial selection
Life history traits
Stress hormone
Testosterone
Issue Date2006
Citation
Journal of Evolutionary Biology, 2006, v. 19, n. 2, p. 343-352 How to Cite?
AbstractVertebrates respond to environmental stressors through the neuro-endocrine stress response, which involves the production of glucocorticoids. We have selected independent, duplicate divergent lines of zebra finches for high, low and control corticosterone responses to a mild stressor. This experiment has shown that over the first four generations, the high lines have demonstrated a significant realized heritability of about 20%. However, the low lines have apparently not changed significantly from controls. This asymmetry in response is potentially because of the fact that all birds appear to be showing increased adaptation to the environment in which they are housed, with significant declines in corticosterone response in control lines as well as low lines. Despite the existence of two- to threefold difference in mean corticosterone titre between high and low lines, there were no observed differences in testosterone titre in adult male birds from the different groups. In addition, there were no consistent, significant differences between the lines in any of the life history variables measured - number of eggs laid per clutch, number of clutches or broods produced per pair, number of fledglings produced per breeding attempt, nor in any of egg, nestling and fledgling mortality. These results highlight the fact that the mechanisms that underlie variation in the avian physiological system can be modified to respond to differences between environments through selection. This adds an additional level of flexibility to the avian physiological system, which will allow it to respond to environmental circumstances. © 2005 European Society for Evolutionary Biology.
Persistent Identifierhttp://hdl.handle.net/10722/230762
ISSN
2015 Impact Factor: 2.747
2015 SCImago Journal Rankings: 2.009

 

DC FieldValueLanguage
dc.contributor.authorEvans, Matthew R.-
dc.contributor.authorRoberts, Mark L.-
dc.contributor.authorBuchanan, Katherine L.-
dc.contributor.authorGoldsmith, Arthur R.-
dc.date.accessioned2016-09-01T06:06:44Z-
dc.date.available2016-09-01T06:06:44Z-
dc.date.issued2006-
dc.identifier.citationJournal of Evolutionary Biology, 2006, v. 19, n. 2, p. 343-352-
dc.identifier.issn1010-061X-
dc.identifier.urihttp://hdl.handle.net/10722/230762-
dc.description.abstractVertebrates respond to environmental stressors through the neuro-endocrine stress response, which involves the production of glucocorticoids. We have selected independent, duplicate divergent lines of zebra finches for high, low and control corticosterone responses to a mild stressor. This experiment has shown that over the first four generations, the high lines have demonstrated a significant realized heritability of about 20%. However, the low lines have apparently not changed significantly from controls. This asymmetry in response is potentially because of the fact that all birds appear to be showing increased adaptation to the environment in which they are housed, with significant declines in corticosterone response in control lines as well as low lines. Despite the existence of two- to threefold difference in mean corticosterone titre between high and low lines, there were no observed differences in testosterone titre in adult male birds from the different groups. In addition, there were no consistent, significant differences between the lines in any of the life history variables measured - number of eggs laid per clutch, number of clutches or broods produced per pair, number of fledglings produced per breeding attempt, nor in any of egg, nestling and fledgling mortality. These results highlight the fact that the mechanisms that underlie variation in the avian physiological system can be modified to respond to differences between environments through selection. This adds an additional level of flexibility to the avian physiological system, which will allow it to respond to environmental circumstances. © 2005 European Society for Evolutionary Biology.-
dc.languageeng-
dc.relation.ispartofJournal of Evolutionary Biology-
dc.subjectZebra finch-
dc.subjectHeritability-
dc.subjectCorticosterone-
dc.subjectArtificial selection-
dc.subjectLife history traits-
dc.subjectStress hormone-
dc.subjectTestosterone-
dc.titleHeritability of corticosterone response and changes in life history traits during selection in the zebra finch-
dc.typeArticle-
dc.description.natureLink_to_subscribed_fulltext-
dc.identifier.doi10.1111/j.1420-9101.2005.01034.x-
dc.identifier.pmid16599910-
dc.identifier.scopuseid_2-s2.0-33645020967-
dc.identifier.volume19-
dc.identifier.issue2-
dc.identifier.spage343-
dc.identifier.epage352-
dc.identifier.eissn1420-9101-

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