Journal Article10.1126/SCIENCE.277.5333.1808
Cichlid Fish Diversity Threatened by Eutrophication That Curbs Sexual Selection
TL;DR: Cichlid fish species of Lake Victoria can interbreed without loss of fertility but are sexually isolated by mate choice, and human activities that increase turbidity destroy both the mechanism of diversification and that which maintains diversity.
read more
Abstract: Cichlid fish species of Lake Victoria can interbreed without loss of fertility but are sexually isolated by mate choice. Mate choice is determined on the basis of coloration, and strong assortative mating can quickly lead to sexual isolation of color morphs. Dull fish coloration, few color morphs, and low species diversity are found in areas that have become turbid as a result of recent eutrophication. By constraining color vision, turbidity interferes with mate choice, relaxes sexual selection, and blocks the mechanism of reproductive isolation. In this way, human activities that increase turbidity destroy both the mechanism of diversification and that which maintains diversity.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
Pelagic Nitrogen Fixation in Lake Victoria (East Africa)
TL;DR: In this article, the authors measured biological nitrogen fixation using the acetylene reduction method at inshore and offshore sites on northern Lake Victoria between 1994 and 1998, and found that biological N fixation was high and often exceeded 0.5 μg N/L/h.
107
The effect of substrate on the efficacy of seismic courtship signal transmission in the jumping spider Habronattus dossenus (Araneae: Salticidae).
TL;DR: The effectiveness of male courtship seismic signals appears to be strongly constrained by the available substratum resources.
Water issues: the need for action at different levels
TL;DR: Water uses can be divided into four sectors, (i) water for people, services and industries, (ii), water for agriculture, water for nature, and water for energy production; a number of water related issues are relevant for each sector, though not all with the same importance as discussed by the authors.
Conservation and the Genomics of Populations
Fred W. Allendorf,W. Chris Funk,Sally N. Aitken,Margaret Byrne,Gordon Luikart,Agostinho Antunes +5 more
- 10 Feb 2022
TL;DR: The third edition has been thoroughly revised to include advances in genomics and contains new chapters on population genomics, genetic monitoring, and conservation genetics in practice, as well as new sections on climate change, emerging diseases, metagenomics, and more.
105
Variation in Spectral Reflectance Among Populations of Dendrobates Pumilio, the Strawberry Poison Frog, in the Bocas Del Toro Archipelago, Panamá
TL;DR: It is argued that variation in coloration may have been enhanced by sexual selection, and there is some evidence for clinal variation in colour and pattern across some mainland populations.
References
The Genetical Theory of Natural Selection
TL;DR: Although it is true that most text-books of genetics open with a chapter on biometry, closer inspection will reveal that this has little connexion with the body of the work, and that more often than not it is merely belated homage to a once fashionable study.
13.7K
Mate selection-A selection for a handicap
TL;DR: It is suggested that characters which develop through mate preference confer handicaps on the selected individuals in their survival, which are of use to the selecting sex since they test the quality of the mate.
5.3K
Heritable true fitness and bright birds: a role for parasites?
William D. Hamilton,Marlene Zuk +1 more
TL;DR: In this paper, a combination of seven surveys of blood parasites in North American passerines reveals weak, highly significant association over species between incidence of chronic blood infections (five genera of protozoa and one nematode) and striking display (three characters: male "brightness", female "brights", and male song).
3.8K