Seasonal variations in the intermediate metabolism of the crayfish Parastacus brasiliensis (Crustacea, Decapoda, Parastacidae) in the natural environment and experimental culture

Iheringia. Série Zoologia

Bibiana K. Dutra¹  Caroline Zank¹  Karina M. Da Silva¹  Maria R. Conter¹  Guendalina T. Oliveira¹ 

[1],Pontifícia Universidade Católica do Rio Grande do Sul Faculdade de Biociências Laboratório de Fisiologia da ConservaçãoPorto Alegre RS ,Brazil

关键词: Crayfish;    lipids;    triglycerides;    glucose;    proteins;    Lagostim;    lipídios;    triglicerídeos;    glicose;    proteínas;   

DOI  :  10.1590/S0073-47212008000300010

来源: SciELO

【 摘 要 】

The goal of this study was to evaluate the effects of seasonal variations on energy metabolism in different tissues of the freshwater crayfish Parastacus brasiliensis (von Martens, 1869). Crayfish were collected monthly from January 2001 to January 2003 in São Francisco de Paula, Rio Grande do Sul, Brazil, in a stream and in a culture tank. Haemolymph samples were collected from each crayfish in the field with a syringe, by puncturing the membrane at the base of the chelipeds. Hepatopancreas, gills, and abdominal muscle were removed for determination of free glucose, glycogen, total lipids, and triglycerides. The haemolymph samples were used for determination of glucose, total proteins, total lipids, and triglycerides. Statistical analysis revealed significant differences in biochemical composition in crayfish collected in the stream compared to the experimental tank during the year, principally in glucose and triglycerides in haemolymph, glycogen and total lipids in all tissues study, and triglycerides only in abdominal muscle. The regular food intake partially modified these seasonal variations of the metabolic pattern. Environmental conditions (e.g., food availability and water temperature) and reproductive period appeared to be the main factors influencing the seasonal patterns of variation in energy metabolism.

【 授权许可】

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