While we start to understand some of the migration patterns of certain shark species and have begun to pinpoint some of their meeting spots, the mysterious lives of sharks and rays in the deeper ocean columns has not been extensively studied – until now. From some of the most mysterious deep-diving species, to those that spend more time in shallower water, a new study, led by ZSL’s Institute of Zoology and Hopkins Marine Station at Stanford University, is the first ever global analysis of shark diving behaviour. A collaborative research team shows how the elasmobranch community which includes sharks, skates and rays use the vertical dimension of the ocean.

Using data from 989 biotelemetry tags – tags which allow remote measurements of behavioural activity – the global team of 171 researchers from 135 institutions analysed 38 species of elasmobranchs from the North Pacific to the Indian Ocean, and the Arctic to the Caribbean. The researchers hope that this new information on shark diving behaviour will help improve the knowledge about sharks’ ecological roles and foster conservation management plans that were previously hindered by lack of data for certain species.

Thirteen species were found to dive to depths greater than one kilometre beneath the surface. Whale sharks were found to dive to a staggering 1,896m while great white sharks were recorded diving deeper than 1,200m, providing new and important insights into the behaviour of these ocean giants.

“Knowing just how deep some species dive (or don’t dive), will help us to inform much needed conservation plans for these species and their relatives   – for example, more widespread use of bycatch avoidance strategies. It will also help us understand how these animals are likely to respond to the predicted climate induced changes to our oceans,” explains Dr David Curnick, research fellow at the ZSL Institute of Zoology and co-lead author of the paper.