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Influence of Cover Availability on Depth Preference of the Juvenile Manini, Acanthurus triostegus sandvicensis

Peter F. Sale
Copeia
Vol. 1968, No. 4 (Nov. 30, 1968), pp. 802-807
DOI: 10.2307/1441847
Stable URL: http://www.jstor.org/stable/1441847
Page Count: 6
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Influence of Cover Availability on Depth Preference of the Juvenile Manini, Acanthurus triostegus sandvicensis
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Abstract

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.

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