Response of muscle-based biochemical condition indices to short-term variations in food availability in post-flexion reared sea bass Dicentrarchus labrax (L.) larvae |
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Authors: | I A Catalán † E Berdalet † M P Olivar † C Roldán † |
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Institution: | Instituto de Ciencias del Mar (CSIC), Passeig Marítim 37-49, Barcelona 08003, Spain |
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Abstract: | Six condition indices based on RNA, total soluble protein and two metabolic enzymes lactate dehydrogenase (LDH) and citrate synthase (CS)] were analysed in muscle tissue of individual larvae, post-flexion reared sea bass Dicentrarchus labrax using DNA and total soluble protein as standards for size. In addition, the effect of 2 days of food deprivation on the cell proliferation rates was assessed. The RNA:DNA best reflected short-term changes in feeding conditions. If standardized by DNA content, LDH activity was a better indicator of condition than any other index but RNA:DNA. Further, the analysis of cell proliferation rates in muscle from 26 day-old larvae proved useful in distinguishing continuously fed larvae from individuals subjected to 2 days of fast. |
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Keywords: | cell proliferation rates condition Dicentrarchus labrax larvae metabolic enzymes RNA:DNA |
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