Abstract

CARVAJAL, Yolimar et al. Bioasimilación de oligoelementos en el camarón de río, Macrobrachium amazonicum (crustacea, palaemonidae)Bioaccumulation of oligoelements  in the river prawn, Macrobrachium amazonicum (Crustacea, Palaemonidae). Bioagro [online]. 2009, vol.21, n.3, pp.217-222. ISSN 1316-3361.

The river prawn, Macrobrachium amazonicum, presents characteristics that make it potentially desirable for culture. The objective of this study was to evaluate its proximal analysis and bioaccumulation of the elements Fe, Cu, Zn  and Se. In order to analyze its bioaccumulation capability, 300 juvenile individuals were distributed into 15 20-L aquaria and five treatments with three repetitions were evaluated in a completely randomized block design. A control group of prawns was feed with commercial fish food. Prawns in the experimental treatments were feed with fish food mixed separately with each one of the elements (Fe, Cu, Zn, Se).The concentration level being twice the nutritional requirements for similar species. After 20 days prawns were sacrificed to split the exoskeleton from the muscular tissue for later analysis. The control group showed a content of  58.1 % protein, 11.0 % fats, 8.6 % carbohydrate, and 0,15 % phosphorus. Significant differences were found within the muscular tissue when compared the control group vs. prawns fed with food with copper (130 vs. 170 mg·kg^-1) and zinc (70 vs. 80 mg·kg^-1). The differences were higher when element concentrations were evaluated in the exoskeleton (140 vs. 200 mg·kg^-1 for copper, and 90 vs. 100 mg·kg^-1 for zinc). This study showed that this prawn represents a rich source of oligoelements when compared with other foods for human consumption, and has some capability for bioaccumulation of copper and zinc, especially at the exoskeleton tissue.

Keywords : Proximal analysis; protein; carbohydrate; phosphorus; fats; muscular tissue; exoskeleton.