The influence of initial trophic conditions on oil globule resorption, growth and survival of gilt head sea bream, Sparus auratus, larvae in extensive breeding

TitleThe influence of initial trophic conditions on oil globule resorption, growth and survival of gilt head sea bream, Sparus auratus, larvae in extensive breeding
Publication TypeJournal Article
Year of Publication1983
AuthorsDivanach, P, Kentouri M
JournalInfluence des conditions trophiques initiales sur la resorption des reserves lipidiques, la croissance et la survie des larves de daurades, Sparus auratus, en elevage extensifAquaculture
Volume35
IssueC
Pages43 - 55
Abstract

Seven trials are described in which larval gilt head sea bream, Sparus auratus, was reared in extensive conditions. Food was provided initially from an endogenous plankton bloom and then, as grazing increased to high levels, from an exogenous supply. Immediate rapid growth, high survival rates, slow oil globule resorption and easy weaning with exogenous plankton were obtained with a diet of pelagic marine ciliates and/or the rotifer, Synchaeta triophthalma. With Branchionus plicatilis or copepod nauplii, results were poor and close to those obtained in the unfed trial. There was a high mortality, slow growth, quick oil globule resorption and the survivors suffered a critical phase. With a mixture of mussel veligers and Synchaeta littoralis, feeding results were intermediate. The reasons for success or failure are discussed and predictions are made for the development of a rearing programme. © 1983.

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