Endocrine-disrupting pesticides impair frog reproduction

In a new study, researchers from Sweden and Britain have investigated how the endocrine-disrupting substance linuron affects reproduction in the West African clawed frog, Xenopus tropicalis. The scientists found that linuron, ...

Skewed sex ratios causes single fathers to bring up the young

When the balance of the sexes is skewed towards one gender, parents are more likely to split up, leaving the father to care for the offspring, says a study from an international team of scientists studying bird populations.

For flour beetles, it's better to be a woman in a man's world

For red flour beetles, being a female in a male world is advantageous. Unlike humans, where this situation traditionally confers a disadvantage, female flour beetles in male-dominated groups seem to reproduce better and live ...

Atrazine alters the sex ratio in Blanchard's cricket frogs

A study published recently in Environmental Toxicology and Chemistry found that Blanchard's cricket frogs are highly sensitive to atrazine. When exposed, there were up to 55% fewer males than females compared with the control ...

When estimating extinction risk, don't leave out the males

Extinction risk for some species could be drastically underestimated because most demographic models of animal populations only analyse the number and fertility of females, dismissing male data as 'noise'.

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