Genetic and environmental effects on secondary sex traits in guppies (Poecilia reticulata)

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Genetic and environmental effects on secondary sex traits in guppies (Poecilia reticulata).

Male guppies (Poecilia reticulata) exhibit extreme phenotypic and genetic variability for several traits that are important to male fitness, and several lines of evidence suggest that resource level affects phenotypic expression of these traits in nature. We tested the hypothesis that genetic variation for male secondary sex traits could be maintained by genotype-specific effects of variable re...

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Effects of Deltamethrin on Lipase Activity in Guppies (Poecilia reticulata)

Effect of the deltamethrin, which is extensively used synthetic pyrethroid, was investigated on the lipase activity of Poecilia reticulata in the present study. One control and five experimental groups were exposed to different concentrations of deltamethrin. Three experiments, including 60 guppies each, were conducted. Titration method was used in order to determine the lipase activity. Lipase...

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Sex-specific effects of carotenoid intake on the immunological response to allografts in guppies (Poecilia reticulata).

Rarely are the evolutionary origins of mate preferences known, but, recently, the preference of female guppies (Poecilia reticulata) for males with carotenoid-based sexual coloration has been linked to a sensory bias that may have originally evolved for detecting carotenoid-rich fruits. If carotenoids enhance the immune systems of these fishes, as has been suggested for other species, this coul...

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Systemic Granulomatosis in Guppies Poecilia reticulata

In many guppy Poecilia reticulata farms in the vicinity of Bangkok, diseases have caused longlasting fish death and consequently large cumulative mortality. Diseased guppies were collected and subjected to histopathological analysis. The analysis revealed systemic granulomatosis as a remarkable histological sign. Rod-shaped bacterial cells with strong acid-fastness were found in the granulomas....

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Observational Learning and Predator Inspection in Guppies (Poecilia reticulata)

Prior work has demonstrated that, following a predator inspection visit of their own, guppies prefer to associate with individuals who inspected a predator most closely. Based on this work, as well as studies of social learning in the context of mate choice, we predicted that male guppies that observed but did not participate in an inspection trial would subsequently choose to associate with th...

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ژورنال

عنوان ژورنال: Journal of Evolutionary Biology

سال: 2005

ISSN: 1010-061X,1420-9101

DOI: 10.1111/j.1420-9101.2004.00806.x