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Effect of larval and prey density, prey dose and light conditions on first feeding common dentex ( Dentex dentex L.) larvae
Author(s) -
Giménez Gemma,
Estévez Alicia
Publication year - 2008
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.2007.01875.x
Subject(s) - biology , larva , predation , stocking , light intensity , photoperiodism , zoology , ecology , botany , physics , optics
Initial larval stocking density, prey density, daily prey ration and light conditions (light intensity and photoperiod) were tested for common dentex larval rearing under experimental conditions. Experiments continued until the first peak of larval mortality. The best results in larval survival were obtained with an initial stocking density of between 10 and 40 larvae L −1 , fed with at least 10 rotifers mL −1 , maintaining ratios of 500–1000 rotifers larva −1 , with one or two adjustments of prey density per day. The use of more than 2000 rotifers larva −1 or three daily adjustments of live prey density had negative effects on larval survival. The best light conditions for common dentex larval rearing were found using a photoperiod of 24 h L:0 h D and an intensity of at least 3.4 μmol m −2 s −1 .