Research reveals that sharks have individual personalities

May 27, 2016

A new study indicates that sharks of the same species can have different personalities.

Certain Port Jackson sharks were bolder than others in tests of the propensity of individuals to emerge from cover and explore a novel, potentially dangerous habitat. Also, certain sharks were more stressed when held out of water.

Boldness and handling stress reactivity were both significantly repeatable in juvenile sharks, and there was a correlation between boldness and more active stress responses.

"This work shows that we cannot think of all sharks as the same. Each has its own preferences and behaviors, and it is likely that these differences influence how individuals interact with their habitat and other species," said Evan Byrnes, lead-author of the Journal of Fish Biology study. "Understanding how individual sharks vary in behaviors such as foraging and habitat use may have large ecological implications and is important to managing these species."
-end-


Wiley

Related Sharks Articles from Brightsurf:

Ancient bony fish forces rethink of how sharks evolved
Sharks' non-bony skeletons were thought to be the template before bony internal skeletons evolved, but a new fossil discovery suggests otherwise.

Reef sharks in decline
Though many people find them intimidating, menacing or just plain scary, sharks are vital to the health of the world's oceans.

Sharks almost gone from many reefs
A massive global study of the world's reefs has found sharks are 'functionally extinct' on nearly one in five of the reefs surveyed.

Plastics found in sea-bed sharks
Microplastics have been found in the guts of sharks that live near the seabed off the UK coast.

Life in the shallows becomes a trap for baby sharks
Baby reef sharks tolerate living in the sometimes-extreme environments of their nurseries -- but these habitats face an uncertain future which may leave newborn sharks 'trapped'.

Caribbean sharks in need of large marine protected areas
Governments must provide larger spatial protections in the Greater Caribbean for threatened, highly migratory species such as sharks, is the call from a diverse group of marine scientists including Stony Brook University School of Marine and Atmospheric Sciences (SoMAS) PhD Candidate, Oliver Shipley.

Recreational fishers catching more sharks and rays
Recreational fishers are increasingly targeting sharks and rays, a situation that is causing concern among researchers.

Walking sharks discovered in the tropics
Four new species of tropical sharks that use their fins to walk are causing a stir in waters off northern Australia and New Guinea.

Lonesome no more: White sharks hang with buddies
White sharks form communities, researchers have revealed. Although normally solitary predators, white sharks (Carcharodon carcharias) gather in large numbers at certain times of year in order to feast on baby seals.

The private lives of sharks
White sharks are top predators in the marine environment, but unlike their terrestrial counterparts, very little is known about their predatory activity underwater, with current knowledge limited to surface predation events.

Read More: Sharks News and Sharks Current Events
Brightsurf.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.