Seasonal variation of the effect of high-carbohydrate and high-protein diets on the intermediate metabolism of Parastacus brasiliensis (Crustacea, Decapoda, Parastacidae) maintained in the laboratory

Iheringia. Série Zoologia

Bibiana K. Dutra²  Karina M. Da Silva²  Caroline Zank²  Maria R. Conter¹  Guendalina T. Oliveira² 

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

关键词: Crayfish;    Experimental culture;    Diet;    Metabolism;    seasonality;    Lagostim;    Cultivo experimental;    Dieta;    Metabolismo;    Sazonalidade;   

DOI  :  10.1590/S0073-47212008000400003

来源: SciELO

【 摘 要 】

The goal of this study was to evaluate the effect of a high-carbohydrate diet (HC) and a high-protein diet (HP) on the metabolism of the crayfish Parastacus brasiliensis (Von Martens, 1869), collected in different seasons and maintained in the laboratory for 15 days. Crayfish were collected monthly from January 2002 to January 2004 at São Francisco de Paula, Southern Brazil, in Guarapirá stream. In the laboratory, the animals were kept submerged in aquariums under controlled conditions. They were fed ad libitum, for 15 days with either a HC or HP diet. At the end of this period, haemolymph samples were collected, as were hepatopancreas, gills, and abdominal muscle that were removed for determination of glycogen, free glucose, lipids, and triglycerides. The haemolymph samples were used for determination of glucose, proteins, lipids, and triglycerides. Statistical analysis (ANOVA) revealed significant seasonal differences in biochemical composition in crayfish maintained on HC or HP diets. Independent of the diets offered to the animals and the controlled conditions for 15 days, the indications of seasonality were unchanged. The observed changes seemed to be related to the reproductive period. Moreover, the HC diet increased all energy reserves in adult parastacids, which may aid in reproduction.

【 授权许可】

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