News tagged with reproductive success

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Do hens have friends? It seems not

(Phys.org)—A Royal Veterinary College study has found that hens reared in commercial conditions do not form friendships and are not particular about who they spend time with.

Jan 18, 2013
3 / 5 (4) 2

Networking ability a family trait in monkeys

Two years of painstaking observation on the social interactions of a troop of free-ranging monkeys and an analysis of their family trees has found signs of natural selection affecting the behavior of the descendants.

Jan 09, 2013
2 / 5 (1) 0 | with audio podcast

Songbird sings in 3D

The question 'How do songbirds sing?' is addressed in a study published in BioMed Central's open access journal BMC Biology. High-field magnetic resonance imaging and micro-computed tomography have been u ...

Jan 07, 2013
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Orsini's viper: Growth or reproduction?

Orsini's viper, a rare and protected species at risk of extinction in France, has an original reproductive strategy. In alternate years, it switches between reproductive and non-reproductive behavior. This ...

Nov 28, 2012
5 / 5 (1) 0

Are elder siblings helpers or competitors?

Having elder siblings decreases mortality risk in childhood, but same-sex elder siblings are associated with lower marriage rates and fewer children for their younger siblings in adulthood, according to the ...

Nov 22, 2012
5 / 5 (1) 0 | with audio podcast

Cuckolded males sing louder

The song of male songbirds is multifaceted and has two main functions: to repel rivals and to attract mates. Females often pay attention to certain features within a song, such as the presence of special ...

Aug 23, 2012
5 / 5 (1) 0 | with audio podcast