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Tag: "showy" at biology news

Looks matter to female barn swallows

... have implications for the evolution and upkeep of showy ornamental traits -- such as a peacock's tail or a deer's antlers -- that are costly for males to maintain but give them an edge over rival males. "If females are assessing mates on a day-to-day basis, it explains why males continue to maintain costl...

Sudden change in social status triggers genetic response in male fish, study finds

...urtoni lives in a hierarchical social system where showy dominant males defend small territories that are used for courtship and breeding. However, dominance among male cichlids is reversible: If a subordinate successfully challenges a dominant male in a face-to-face confrontation, the dominant fish will l...

Fish can determine their social rank by observation alone, study finds

... their face. After a fight, the winner retains his showy appearance, but the loser's eyebar temporarily disappears as he tries to flee his more aggressive opponent. To test for transitive inference, the Stanford team took advantage of this reversible change in appearance by staging a series of short fi...

The price of vanity: Mating with showy males may reduce offspring's ability to fight off pathogens

...y animals, males advertise to potential mates with showy traits, many of which are linked to testosterone l..., Sweden) finds that mating with males who possess showy traits ?such as bright colors or long tails and fins ?results in higher testosterone levels in males...

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