Thermoregulatory Behavior of a Tropical Reef Fish, Zebrasoma flavescens
1980; Wiley; Volume: 34; Issue: 3 Linguagem: Inglês
10.2307/3544295
ISSN1600-0706
AutoresWilliam W. Reynolds, Martha E. Casterlin,
Tópico(s)Marine and fisheries research
ResumoTen Hawaiian Laipala surgeonfish (Acanthuridae), Zebrasoma flavescens (Bennett), were tested individually in electronic Ichthyotron shuttleboxes for ability to thermoregulate behaviorally. The fish exhibited a diel rhythm of preferred temperature, with a minimum of 19?C at midnight and a maximum of 23?C at noon. The 24-h mean final thermal preferendum was 21?C, similar to the final preferenda of temperate cool-water fishes. The similar thermoregulatory behavior of tropical marine and temperate freshwater fishes suggests that thermoregulatory ability is phylogenetically conservative and not strongly influenced by thermal stability of the environment.
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