Color signals in the Black Grouse (Tetrao tetrix) : signal properties and their condition dependency Siitari, Heli, Alatalo, Rauno V., Halme, Panu, Buchanan, Katherine L. and Kilpimaa, Janne 2007, Color signals in the Black Grouse (Tetrao tetrix) : signal properties and their condition dependency, American naturalist, vol. 169, no. supplement, pp. S81-S92, doi: 10.1086/510140. Attached Files Name Description MIMEType Size Downloads Title Color signals in the Black Grouse (Tetrao tetrix) : signal properties and their condition dependency Formatted title Color signals in the Black Grouse (Tetrao tetrix) : signal properties and their condition dependency Author(s) Siitari, Heli Alatalo, Rauno V. Halme, Panu Buchanan, Katherine L. orcid.org/0000-0002-6648-5819 Kilpimaa, Janne Journal name American naturalist Volume number 169 Issue number supplement Start page S81 End page S92 Publisher University of Chicago Press Place of publication Chicago, Ill. Publication date 2007-01 ISSN 0003-0147 1537-5323 Keyword(s) carotenoids color spectrum analysis sexual selection structural coloration testosterone Summary Recent progress in techniques of quantifying between‐individual differences of color‐based ornaments has revealed undiscovered possibilities for research in sexual selection. We present how the color spectra data can be comprehensively used for studying the importance of sexual ornaments in the black grouse and how these ornaments are related to a male condition. For this, we used both correlative field and experimental data. Field data indicated that older males had more chromatic coloration than yearlings. Blue chroma of males was correlated with male mating success. We experimentally manipulated yearling birds with testosterone implants and found that testosterone‐implanted males had impaired expression of several sexual ornaments: 10 months after the implantation, both structural‐based blue and carotenoid‐based red eye comb coloration were diminished, as well as lyre (tail) length. However, the manipulation did not affect vital traits under natural selection (wing length or body mass). Our data indicate that structural color is an important trait in sexual selection in this lekking species. Importantly, the data also indicate that male sexual ornaments are more susceptible to environmental conditions than the other male traits, thus showing their heightened condition dependency compared with the other traits mediating the honesty of signaling. Notes (published January 2007) Language eng DOI 10.1086/510140 Field of Research 060399 Evolutionary Biology not elsewhere classified Socio Economic Objective 970106 Expanding Knowledge in the Biological Sciences HERDC Research category C1.1 Refereed article in a scholarly journal ERA Research output type C Journal article Copyright notice ©2007, The University of Chicago Persistent URL http://hdl.handle.net/10536/DRO/DU:30020165 Document type: Journal Article Collections: Faculty of Science, Engineering and Built Environment School of Life and Environmental Sciences Centre for Integrative Ecology Related Links Link Description Connect to published version (restricted access) Go to link with your DU access privileges     Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved. Versions Version Filter Type Wed, 30 Sep 2009, 13:25:07 EST Wed, 30 Sep 2009, 14:57:54 EST Wed, 30 Sep 2009, 16:10:13 EST Thu, 08 Oct 2009, 10:58:24 EST Thu, 08 Oct 2009, 11:00:16 EST Thu, 08 Oct 2009, 11:49:26 EST Fri, 16 Oct 2009, 11:10:16 EST Fri, 14 May 2010, 12:28:31 EST Fri, 14 May 2010, 12:29:45 EST Fri, 03 Feb 2012, 12:31:40 EST Mon, 16 Jun 2014, 13:18:04 EST Tue, 06 Sep 2016, 13:30:29 EST Filtered Full Citation counts:   Cited 53 times in TR Web of Science Cited 59 times in Scopus Search Google Scholar Access Statistics: 1140 Abstract Views, 19 File Downloads  -  Detailed Statistics Created: Wed, 30 Sep 2009, 13:25:07 EST