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Research Data Australia. Search is restricted to [[ filters. Publicly accessible online. Advanced Search Map Search. Handbook of Western Australian Birds. Each species comprehensively treated with information on morphology, distribution, status, habitat preferences, migration ,nests, eggs, food and behaviour. Originally sourced from WA Museum researchers May, Modified: Similar datasets you may be interested in:. Volume 2- Passerines Blue-winged Pitta to Goldfinch. Australian Ocean Data Network. EndNote Web. EndNote Help. Use the?
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What do declining woodland birds eat? A synthesis of dietary records
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Select the box tool. Click on the map and drag the mouse to draw a rectangle. Release the mouse to finish. Note: Adding a Location filter will restrict your search to only records that have location information described. Current Search. Hit Search. Search Terms Query Constructor The Query Constructor provides a way of searching for records using multiple search term combinations and Boolean operators. Nonetheless, a large majority of these values of sexual dichromatism were low enough to suggest sexual monochromatism Eaton While we did find some significant differences between mechanisms in the levels of sexual dichromatism Figs.
The only apparent exception was red carotenoids in passerines Fig. Our data tend to support this view. The proportion of the plumage covered by different mechanisms of colour production mostly had small effects on overall sexual dichromatism Fig. Conversely, Gray found a negative effect, which is similar to our results for chromatic sexual differences in pheomelanins Fig.
For structural colours, Gray found negative effects on sexual dichromatism, while we find a positive effect but only for male plumage see below, Fig. Interestingly, such contrasting effects are also found within orders, where the effects of a particular mechanism on sexual dichromatism have different signs for chromatic and achromatic components.
Such differences between chromatic and achromatic components of sexual dichromatism further complicate comparisons with previous studies because these have often combined these components Gray While in most cases male and female plumage colours are produced by the same mechanism, the highest average levels of sexual dichromatism are achieved in those rarer cases when sexes colour their feathers using different mechanisms. The opposite effects in males and females are consistent with the link between high levels of dichromatism and the evolution of different mechanism of colour production in the sexes Figs.
This is not directly predicted by our understanding of red carotenoids as being highly costly pigments and suggests that further targeted studies and analyses of such species could generate further insights.
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Our data show that certain mechanisms of colour production such as red carotenoids tend to be associated with higher levels of sexual dichromatism both at the level of the plumage patch or the entire plumage. We thank J.
Smith, R. Little and H. Morales for help with spectral measurements; L. Joseph and R. Longmore and K.
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Roberts at Museum Victoria for granting access to the specimens under their care; and V. Delhey for statistical advice. We are grateful for the comments of G. Hill, the associate editor and anonymous reviewers that greatly improved the manuscript. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries other than missing content should be directed to the corresponding author for the article. Volume 31 , Issue 4. If you do not receive an email within 10 minutes, your email address may not be registered, and you may need to create a new Wiley Online Library account.
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Functional Ecology. Standard Paper Free Access. Kaspar Delhey Corresponding Author E-mail address: kaspar. Tools Request permission Export citation Add to favorites Track citation. Share Give access Share full text access. Share full text access.
BREEDING BIOLOGY OF PASSERINES IN A SUBTROPICAL MONTANE FOREST IN NORTHWESTERN ARGENTINA
Please review our Terms and Conditions of Use and check box below to share full-text version of article. Summary Sexual dichromatism SD often reflects intense sexual selection on males. Figure 1 Open in figure viewer PowerPoint.
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Overview of levels of sexual dichromatism and methods used to compute these. The location of each plumage colour is defined by a set of coordinates that specify its location on the three axes xyz. S1—S3 for more details. The longer the line measured in just noticeable differences , the higher the sexual dichromatism for that particular plumage patch. Note that in this example most female and male plumage patches are similarly coloured and most lines are not visible. Symbol colours indicate mechanisms of colour production as in a.
Longer bars indicate higher values of sexual dichromatism.
Some representative families have been highlighted with arbitrary colours. Figure 2 Open in figure viewer PowerPoint. Note that the two rows do not consistently represent one sex above and the other below e. Figure 3 Open in figure viewer PowerPoint. Figure 4 Open in figure viewer PowerPoint.
Male slopes: square symbols, female slopes: circles. To ease interpretation, the sign of each slope was adjusted so that positive effects indicate positive relationships. Size of symbols indicates model marginal R 2. Full model results in Tables S5—S Acknowledgements We thank J. Supporting Information. Filename Description fecsupLaySummary. Andersson, S. Functional Ecology , 21 , — Google Scholar. Crossref PubMed Google Scholar. Crossref Google Scholar. Citing Literature.