Determinants of established success in introduced birds

Article Abstract:

Research is presented concerning the factors which influence the success or failure of species translocation from a native to an alien environment. The greater biotic resistance of species-rich areas is discussed.

Biotic communities, Animal introduction

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Intraspecific competition favours niche width expansion in Drosophila melanogaster

Article Abstract:

Research is presented concerning broader niche expansion which frequently occurs when a species invades an area which species-poor. The relationship between diversity and intraspecific competition is discussed.

Biological diversity, Biodiversity, Drosophila

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Female feral fowl eject sperm of subdominant males

Article Abstract:

A new study of the fowl Gallus gallus domestricus shows that females consistently eject the sperm of subdominant males and preferentially retain that of dominant males.

Sexual behavior, Chickens, Social hierarchy in animals, Dominance (Animal behavior), Sexual intercourse

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