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

By B. Costas, C. Aragão, J. Mancera, M. T. Dinis, Luís E. C. Conceição. 2007

204 citations recorded by the source corpus.

Fish held at high stocking densities are generally exposed to chronic stress situations that impose severe energy demands and may predispose the fish to infection. Senegalese sole Solea senegalensis (Kaup) juveniles (78.8±18.9 g body weight) were maintained at low (LSD; 4 kg m−2 at the end of the experiment), medium (MSD; 9 kg m−2) and high (HSD; 14 kg m−2) stocking densities during a period of 63 days. Although disease outbreaks were observed in fish reared at HSD, growth and food consumption did not vary among different treatments. Results from plasma cortisol and free amino acids (FAAs) showed significant differences among different rearing densities pointing to HSD as stressful rearing condition. However, higher plasma glucose and osmolality levels indicated that fish held at MSD may also be under stress. The higher usage of FAAs from the HSD group may be due to the higher demand for energy production in order to cope with stressful rearing conditions, higher rate of protein synthesis or due to synthesis of other important metabolites related to stress response. Therefore, results from the present study point out to HSD as a stressful rearing condition and suggest that crowding stress may affect amino acid requirements.

Subfields: Aquatic Science, Immunology

View Paper: https://www.semanticscholar.org/paper/480d7d5e83e01712a1f0044fde018ccfe0443bfe

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In Aquatic Science

1. M. P. M. Río
2. M. Martínez‐Porchas
3. L. R. Martínez-Córdova
4. Luís E. C. Conceição
5. J. Mancera
6. G. Marino

In Immunology

1. M. Martínez‐Porchas
2. L. R. Martínez-Córdova
3. Luís E. C. Conceição
4. J. Mancera

Citations in the corpus

• Individual differences in cortisol levels and behaviour of Senegalese sole (Solea senegalensis) juveniles: Evidence for coping styles (2010, background): “Studies performed with Senegalese sole housed in groups reported an individual variation in growth ranging from 21% till 29% (Aragão et al., 2008; Costas et al., 2008) showing values in fact somewhat smaller than the values obtained in this study using individual housing.”
• Tertiary stress responses in Senegalese sole (Solea senegalensis Kaup,1858) to osmotic challenge: Implications for osmoregulation, energy metabolism and growth (2009, background): “Nevertheless, growth and survival from juvenile to market-size fish revealed deficiencies with regard to rearing technology and husbandry conditions (Costas et al., 2008).”
• Cortisol and Glucose: Reliable indicators of fish stress? (2009, background): “However there have been observed increases in blood glucose whilst cortisol secretion is impaired (Costas et al. 2008).”