Across the animal kingdom, we see remarkable variation in brain size. This variation has
even increased over evolutionary time. Traditionally, studies aiming to explain brain size …

As the study of the human brain is complicated by its sheer scale, complexity, and
impracticality of invasive experiments, neuroscience research has long relied on model …

A curated database of shark and ray biological data is increasingly necessary both to
support fisheries management and conservation efforts, and to test the generality of …

Considerable diversity has been documented in most sensory systems of elasmobranchs
(sharks, rays, and skates); however, relatively little is known about morphological variation in …

The ecological and life history drivers of the diversification of reproductive modes in early
vertebrates are not fully understood. Sharks, rays and chimaeras (group Chondrichthyes) …

Overfishing, habitat loss, and climate change are driving population declines in many
species. Understanding a species' capacity to recover from these and other threats is …

Large brains support numerous cognitive adaptations and therefore may appear to be highly
beneficial. Nonetheless, the high energetic costs of brain tissue may have prevented the …

Brain region size generally scales allometrically with brain size, but mosaic shifts in brain
region size independent of brain size have been found in several lineages and may be …

The reproductive diversity of extant cartilaginous fishes (class Chondrichthyes) is
extraordinarily broad, reflecting more than 400 million years of evolutionary history. Among …

Giant guitarfishes (Glaucostegidae) and wedgefishes (Rhinidae) are some of the most
threatened marine taxa in the world, with 15 of the 16 known species exhibiting global …