Thermoregulatory behavior of the triggerfish Balistes fuscus in an electronic shuttlebox |
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Authors: | William W Reynolds Martha E Casterlin |
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Institution: | (1) Marine Biology Program, University of New England, 04005 Biddeford, ME, U.S.A. |
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Abstract: | Ten blue triggerfish,Balistes fuscus, were tested individually for 3 days each in Ichthyotron electronic shuttleboxes to measure their thermoregulatory behavior. The modal thermal preferendum, a species-specific measure of temperature preference which is independent of prior thermal acclimation, was 25 °C. The triggerfish voluntarily occupied a 16–27 °C range of temperature, out of a potentially available range of 0–50 °C. There was no significant difference in preferred temperature between night and day, indicating lack of a thermoregulatory rhythm in this species. The preferred temperature range of this tropical marine reef species is similar to that of cool temperate freshwater and marine fishes; many warm temperate species prefer higher temperatures. |
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Keywords: | thermoregulation behavior temperature triggerfish Balistes fuscus tropical reef Ichthyotron |
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