There is a greater than two-fold difference in offspring weight between populations of the mosquito fish Gambusia affinis, an ovoviviparous poeciliid. This study determined if these differences have a ...

Add articles to your saved list and come back to them any time. Strictly speaking, a gonopodium is not a penis. However, the larger this male reproductive organ is in one fish species then the bigger ...

A long-term fish experiment reveals how a mechanism called density dependence, in which the population growth rate slows as the number of individuals rises, affects population dynamics on time scales ...

Vertebrates have extremely different brain sizes: even with the same body size, brain size can vary a hundredfold.

When it comes to motherhood, at least if you're a fish, big is better. Bigger fish produce more far more offspring pound for pound than smaller fish. And that can mean more on your plate. The new ...

Big isn't always better when it comes to the size of male genitals. Researchers at The Australian National University (ANU) have been looking at the breeding habits of fish, to test the theory that ...

There’s an old paradox about coral reefs: They occupy tiny parts of the ocean, and nutrient-poor parts of it at that, and yet they’re home to a third of the world’s fish species. Millions of people ...

Abstract: The evolution of viviparity increases the potential for genomic conflicts between mothers and offspring over the level of maternal investment. The viviparity‐driven‐conflict hypothesis ...