Erosion of the upper Arkadelphia Formation by the Ouachita River in Hot Spring County, Arkansas, has revealed a diverse and abundant, late Maastrichtian chondrichthyan fauna representing at least 17 ...

A new analysis published in the journal Science reveals that overfishing has caused populations of chondrichthyan fishes – sharks, rays, and chimaeras – to decline by more than 50 per cent since 1970.

To shine light on and conserve rare shark, ray, and chimaera species (chondrichthyans), researchers have developed a fully-resolved family tree and ranked every species according to the unique ...

We live in a world of accelerated biodiversity loss but limited resources for the conservation and management of these animals. For terrestrial animals, conservationists use evolutionary distinctness ...

A new analysis reveals that overfishing has caused populations of chondrichthyan fishes -- sharks, rays, and chimaeras -- to decline by more than 50 per cent since 1970. To determine the consequences, ...