HCNSO Student Theses and Dissertations

Copyright Statement

All rights reserved. This publication is intended for use solely by faculty, students, and staff of Nova Southeastern University. No part of this publication may be reproduced, distributed, or transmitted in any form or by any means, now known or later developed, including but not limited to photocopying, recording, or other electronic or mechanical methods, without the prior written permission of the author or the publisher.

Defense Date


Document Type

Thesis - NSU Access Only

Degree Name

M.S. Marine Biology


Oceanographic Center

First Advisor

Richard E. Spieler

Second Advisor

Bart Baca

Third Advisor

Shyh-Min Tom Hsiao


The circadian feeding rhythm of juvenile Florida pompano, Trachinotus carolinus, to demand feeders, was electronically recorded. The fish were maintained under artificial light-dark conditions (LD 15:9) and given continuous access to food via demand bars. A distinct circadian feeding rhythm was displayed. Food demands occurred almost exclusively (99.0%) during the light phase. Feeding activity was highest early in the light period and progressively lessened as the day progressed. The fish made significantly more food demands during the two-hour period of maximum demand (0600 - 0800 hrs, 21.5 ± 5.2% of the total daily food demands) than during the period of minimum demand (1800 - 2000 hrs, 6.8 ± 2.1 %) (P

The maximum and minimum food demand periods were then used to test the effects of meal feeding time on food consumption and growth performance in juvenile T. carolinus. The fish were fed by hand, at either 0600-0800 hrs or 1800-2000 hrs, for five weeks. The fish received a ration of 1% bw/30 min, during the two hour period. At the end of the study, the fish fed in the morning, the preferred feeding time, had significantly lower body weight and shorter body length than the fish fed in the evening (P0.05, One-way ANOVA). Results of this study indicate that the use of feeding schedules that take advantage of circadian rhythms may be a viable technique to enhance growth performance of T. carolinus on a commercial scale.

Files over 10MB may be slow to open. For best results, right-click and select "Save as..."

To access this thesis/dissertation you must have a valid nova.edu OR mynsu.nova.edu email address and create an account for NSUWorks.

Free My Thesis

If you are the author of this work and would like to grant permission to make it openly accessible to all, please click the Free My Thesis button.

  Link to NovaCat