Functional masculinization of female guppies, Poecilia reticulata, influenced by methyltestosterone before birth.
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چکیده
منابع مشابه
Effects of methyltestosterone, tamoxifen, genistein and Basella alba extract on masculinization of guppy (Poecilia reticulata)
Article history: Received on: 28/11/2012 Revised on: 17/12/2012 Accepted on: 24/12/2012 Available online: 29/12/2012 The effects of different anti-estrogenic chemicals were evaluated in guppy, Poecilia reticulata on sex differentiation and survival. New-born fry of the fish were fed diets containing genistein (1 gm kg), tamoxifen (100 mg kg), methanol extract of Basella alba (1 gm kg) and 17α-m...
متن کاملSystemic 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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1985). Female body size is positively correlated both Mate choice by males in organisms that do not make obviously costly contributions to offspring should be expected where sperm production is limited and courtship time is finite. Although male guppies (Poecilia reticulata) contribute only sperm to their offspring, preliminary evidence points to male mate choice in this species. Thus, the hypo...
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The coordinated and synchronized movement of animals in groups often referred to as collective motion emerges through the interactions between individual animals within the group. Factors which affect these interactions have the potential to shape collective movement. One such factor is familiarity, or the tendency to bias behaviour towards individuals as a result of social recognition. We exam...
متن کاملRapid evolution of escape ability in Trinidadian guppies (Poecilia reticulata).
Predators are widely assumed to create selection that shapes the evolution of prey escape abilities. However, this assumption is difficult to test directly due to the challenge of recording both predation and its evolutionary consequences in the wild. We examined these events by studying natural and experimental populations of Trinidadian guppies, Poecilia reticulata, which occur in distinct hi...
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ژورنال
عنوان ژورنال: NIPPON SUISAN GAKKAISHI
سال: 1975
ISSN: 1349-998X,0021-5392
DOI: 10.2331/suisan.41.499