... in a tank with conspecifics or confined to individual respirometers. After tag implantation under anaesthesia, heart rate ( f H ) required 60 h to recover to a stable value in a holding tank. Subsequently, when undisturbed under control conditions (normoxia, 21°C), mean f H was always significantly lower...

...Patrick J. Walsh; Bonnie C. Tucker; Todd E. Hopkins ABSTRACT In order to elucidate the cues for, and the biochemical mechanisms of, the transition to ureogenesis in the gulf toadfish Opsanus beta , experiments on the effects of confinement/crowding were carried out. Confinement of toadfish to small...