High stocking density induces crowding stress and affects amino acid metabolism in Senegalese sole Solea senegalensis (Kaup 1858) juveniles

Costas, B.; Aragão, C.; Mancera, J. M.; Dinis, Maria Teresa; Conceição, L. E. C.; Refojos, B. C.

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Authors

Conceição, L. E. C.

Abstract(s)

Fish held at high stocking densities are generally exposed to chronic stress situations that impose severe energy demands and may predispose the ¢sh to infection. Senegalese sole Solea senegalensis (Kaup) juveniles (78.8 18.9 g body weight) were maintained at low (LSD; 4 kg m2 at the end of the experiment), medium (MSD; 9 kg m2 ) and high (HSD;14 kg m2 ) stocking densities during a period of 63 days. Although disease outbreaks were observed in ¢sh reared at HSD, growth and food consumption did not vary among di¡erent treatments. Results from plasma cortisol and free amino acids (FAAs) showed signi¢- cant di¡erences among di¡erent rearing densities pointing to HSD as stressful rearing condition.

Keywords

Amino acids Stress response Cortisol Senegalese sole Glucose Density

URI

http://hdl.handle.net/10400.1/4646

Citation

Costas, B.; Aragão, C.; Mancera, J.M.; Dinis, M.T.; Conceição, L.E.C.; Refojos, B.C.High stocking density induces crowding stress and affects amino acid metabolism in Senegalese sole Solea senegalensis (Kaup 1858) juveniles, Aquaculture Research, 39, 1, 1-9, 2008