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Lekking and the evolution of sexual dimorphism in birds: comparative approaches

Article Abstract:

The finding that lekking birds were not significantly more sexually size- or plumage-dimorphic than non-lekking birds when phylogenetic history is accounted for was evaluated. Felsenstein's matched pairwise independent comparisons showed that lekking birds were significantly more size-dimorphic than their non-lekking close relatives. This result was obtained because Felsenstein's method can be used with continuous variables, and confounding third variables are eliminated by comparing only close taxonomic groups sharing similar ecologies and selection pressures. Ancestor transitions are calculated from, and therefore dependent on, descendant states.

Author: Oakes, E.J.
Publisher: University of Chicago Press
Publication Name: The American Naturalist
Subject: Earth sciences
ISSN: 0003-0147
Year: 1992
Evolution (Biology), Birds, Lek behavior, Dimorphism (Animals)

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The effect of mating probability on risk taking: an experimental study in lekking great snipe

Article Abstract:

A study using a dynamic model to investigate the relationship between mating probability and risk taking for lekking animals affected by the predators shows that a lekking male with high mating probability has shortest hiding time after the attack of the predator as compared to males with low mating probability. The hiding period increases with the increase in risk of predation and the enhanced mating advantage of retrieval after an attack decreases the differences in optimal hiding time of males with distinct mating probabilities.

Author: Fiske, Peder, Kalas, John Atle, Saether, Stein Are
Publisher: University of Chicago Press
Publication Name: The American Naturalist
Subject: Earth sciences
ISSN: 0003-0147
Year: 1995
Research, Sexual behavior in animals, Animal sexual behavior

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The evolution of traits influencing male and female fertility in outcrossing plants

Article Abstract:

A quantitative genetic model was developed to explain the evolution of quantitative traits that influence male and female fertilities in outcrossing hermaphroditic plants. The model addresses the evolution of separate sexes as mutation at major-gene loci which occurs only under restrictive conditions, that is, when the multivariate phenotype resulting in maximum female fertility is very different from the phenotype that favors maximum male fertility.

Author: Morgan, Martin T.
Publisher: University of Chicago Press
Publication Name: The American Naturalist
Subject: Earth sciences
ISSN: 0003-0147
Year: 1992
Models, Quantitative genetics, Dimorphism (Plants)

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Subjects list: Genetic aspects, Dimorphism (Biology)
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