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Influence of Cover Availability on Depth Preference of the Juvenile Manini, Acanthurus triostegus sandvicensis
Peter F. Sale
Vol. 1968, No. 4 (Nov. 30, 1968), pp. 802-807
Stable URL: http://www.jstor.org/stable/1441847
Page Count: 6
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Field observations of distribution of juvenile manini, Acanthurus triostegus sandvicensis, indicate that smaller juveniles occur in shallower depths than do larger ones. Laboratory experiments in a three-step depth gradient showed that smaller juveniles (3-4 cm) preferred shallow regions (20 cm), whereas larger juveniles seemed to prefer deeper regions (40-60 cm). The depth response of small juveniles was found to depend on the presence of adequate cover at all depths of the tank. In the absence of cover, the smaller juveniles preferred the deeper parts of the tank.