Until now, ancestors of modern sharks from 374 million years ago were the oldest known creatures to have both rods to see in dim light and cones, for bright light.
Recently, the genome of the elephant shark, Callorhinchus milii, a chimaerid holocephalan, has been sequenced and therefore becomes the first cartilaginous fish to be analyzed in this way. The chimaeras have been largely neglected and very little is known about the visual systems of these fishes.
By searching the elephant shark genome, Hunt's team have identified gene fragments encoding a rod visual pigment and three cone visual pigments. It also has two copies of the long-wavelength cone pigment gene, a duplication which may have given them trichromatic vision like primates.Read More
"With warmer temperatures and changing climatic conditions increasing the pressure on water availability, ecological communities such as this must be protected," Mr Garrett said.Read More
“Ana’s journey has revealed an ‘oceanic superhighway’ that helps us better understand how marine turtles navigate around the world’s oceans as well as highlighting the strong ecological and evolutionary connections between Indonesia and Australia’Read More
Interspecies was started in 1978, to grant artists the same access to wilderness and wild animals that is usually reserved for field biologists. Their goal and belief is that science is not the only approach to understanding nature.Read More