IF YOU are going to jump into the sea with sharks, it’s probably best to have some understanding of how they behave. A study of possible threat displays in 23 shark species could make it easier to read the signs.
Aidan Martin – a shark expert at the University of British Columbia in Vancouver, Canada, until his death at home in February – described 29 different components to threat displays by sharks in a study published posthumously this week (Marine and Freshwater Behaviour and Physiology, vol 40, p 3). For about two-thirds of the species studied, this is the first detailed…
