In mosquitofish, of the genus Gambusia, male fish are smaller than females -- sometimes only half the size. Biologists had previously assumed that smaller male mosquitofish had at least some ...

Male seahorses have quietly rewritten one of biology’s most familiar scripts, shifting the burden of pregnancy and birth onto fathers and turning paternal care into a full‑body commitment. Their ...

Identifying sources of variation in individual reproductive success is crucial to our understanding of population dynamics and evolutionary ecology. We evaluated sources of variation in reproductive ...

The kisspeptin system is increasingly recognised as a central regulator of reproductive physiology in fish. Unlike mammals, teleosts often harbour two or more kisspeptin genes (e.g. Kiss1 and Kiss2) ...