A female Norwegian Atlantic salmon swims in a tank as part of a study at the University of Wisconsin-Madison Water Science & Engineering Laboratory. Photo: Jeff Miller/University of Wisconsin
A female Norwegian Atlantic salmon swims in a tank as part of a study at the University of Wisconsin-Madison Water Science & Engineering Laboratory.

Discovery aims to solve stress in fish farms

Secretion from preen gland in birds may reduce stress, improve survivability of farmed fish.

A University of Wisconsin-Madison group that discovered a way to improve survival in fish farms has begun to unravel the mechanism behind their unexpected finding.

In a series of experiments, they are probing how an oil from a gland that birds use to condition their feathers can keep fish alive. The most likely explanation involves an alteration in their response to stress.

The idea that fish suffer stress seems tailor-made for a comedy routine, but it is an invention that may

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