Sexual dimorphism in a trophically polymorphic cichlid fish?
نویسندگان
چکیده
منابع مشابه
Sexual dimorphism in a trophically polymorphic cichlid fish?
Sexual dimorphism in ecologically relevant traits is ubiquitous in animals. However, other types of intraspecific phenotypic divergence, such as trophic polymorphism, are less common. Because linkage to sex should often lead to balancing selection, understanding the association between sex and phenotypic divergence could help explain why particular species show high morphological variability. T...
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*School of Biology, Georgia Institute of Technology, Atlanta, Georgia 30332, U.S.A., ‡Department of Biological Sciences and Merriam Powell Center for Environmental Research, Northern Arizona University, Flagstaff, Arizona 86011, U.S.A., §Section of Integrative Biology and Texas Memorial Museum, University of Texas, Texas Natural History Collections, Austin, Texas, 78758, U.S.A., {University of ...
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A mechanism commonly suggested to explain the persistence of color polymorphisms in animals is negative frequency-dependent selection. It could result from a social dominance advantage to rare morphs. We tested for this in males of red and blue color morphs of the Lake Victoria cichlid, Pundamilia. Earlier work has shown that males preferentially attack the males of their own morph, while red m...
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Sexual selection could be a driving force in the maintenance of intraspecific variation, but supporting observations from nature are limited. Here, we test the hypothesis that spatial heterogeneity of the visual environment can influence sexual selection on colourful male secondary traits such that selective advantage is environment contingent. Using a small fish endemic to Sulawesi, Indonesia ...
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http://dx.doi.org/10.1016/j.anbehav.2015.11.022 0003-3472/© 2015 The Association for the Study of A Colonial species breed in densely aggregated territories containing no resources other than nest sites. This behaviour is usually explained by natural selection, for instance through benefits resulting from reduced predation risk. An alternative hypothesis suggests that, as in lek breeding system...
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ژورنال
عنوان ژورنال: Journal of Morphology
سال: 2015
ISSN: 0362-2525
DOI: 10.1002/jmor.20433