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- Publisher
- Oxford University Press
- Copyright
- Copyright © 1977 Wiley Subscription Services, Inc., A Wiley Company
- ISSN
- 0024-4066
- eISSN
- 1095-8312
- DOI
- 10.1111/j.1095-8312.1977.tb00270.x
- Publisher site
- See Article on Publisher Site
Abstract
Changes in the feeding ecology of juveniles (10–59 mm standard length) of eleven species of Mugilidae were investigated in south‐east African estuaries. Adults of all species spawn in the sea and juveniles enter estuaries at a length of about 10 mm. In estuaries they change their feeding habits in the following sequence: zooplankton to zooplankton in the benthos (10–15 mm), zooplankton in the benthos to meiobenthos (10–20 mm), and meiobenthos to sand particles and associated microbenthos (15–25 mm). All species show a similar pattern of change but interspecific competition is probably prevented by the rapid switch to the adult diet of microbenthos and sand particles and because species enter estuaries at different times according to spawning periods. The juveniles seek shallow quiet water areas of estuaries and it is suggested that the change from being planktonic macrophagous carnivores to benthic microphagous omnivores can only take place in the estuaries of the region. Conditions in the inshore waters of the Indian Ocean in south‐east Africa are probably too rough for substrate feeding by juvenile mullet.
Journal
Biological Journal of the Linnean Society – Oxford University Press
Published: Sep 1, 1977