Energy budget of juvenile fat snook Centropomus parallelus fed live food

Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
D LemosA Germano

Abstract

The fat snook Centropomus parallelus is a tropical estuarine species with importance for recreational and commercial fisheries and further aquaculture potential. Considering ingested energy (C) is channeled into growth (P), metabolic expenditure (R), excretion (U) and feces (F), a balanced energy budget was established for isolated and grouped juvenile C. parallelus (5.18 to 10.25 g wet mass) by experimental quantification of each of these parameters. Fish were fed live prawn (Macrobrachium sp.) at 25 degrees C and 20 per thousand for 19 days and daily energy budgets could be calculated. Energy content of food (live prawn), fish whole body and feces were 17.7, 14.5 and 6.1 KJ g(-1) dry mass (DW), respectively. Mass-specific rates of oxygen consumption and ammonia-N excretion were 0.271 and 0.0082 mg of O(2) or NH(3)-N g(-1) wet mass (WW) h(-1), respectively, resulting in O:N=23.4. Daily ingestion (C) was dependent on the amount of food offered and ranged between 4.9% to 7.4% of initial wet weight. Growth (P) was positively correlated with initial mass varying from 0.008 to 0.104 g day(-1). Feces release also correlated to fish mass and averaged 9.53 mg dry mass day(-1). The components of energy budget showed mean values of 2.39...Continue Reading

References

Apr 27, 2001·Brazilian Journal of Medical and Biological Research = Revista Brasileira De Pesquisas Médicas E Biológicas·M E SeiffertL A Madureira
Mar 8, 2003·Planta medica·Fátima CerqueiraMaria São José Nascimento

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Citations

Aug 24, 2010·Brazilian Journal of Biology = Revista Brasleira De Biologia·M J T Assunção-AlbuquerqueF S Albuquerque

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