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Latin american journal of aquatic research

On-line version ISSN 0718-560X

Abstract

LOPEZ, Jesús et al. Volume loss of an aquaculture net pen due to current speed and linear weight of sinker ring. Lat. Am. J. Aquat. Res. [online]. 2015, vol.43, n.2, pp.309-314. ISSN 0718-560X.  http://dx.doi.org/10.3856/vol43-issue2-fulltext-6.

The internal volume of aquaculture net pens is an important variable to fish comfort during the culture process. In this research, a module of net pens was modelled using the finite element (FE) software AquaSim®. The net pens deformation was analyzed under different current speeds (0.25, 0.50 and 0.75 m s-1) and linear weights of the sinker rings (30, 40 and 50 kg m-1). It was found that under the most severe condition, that is, the highest current speed and the lowest linear weight of the sinker ring (0.75 m s-1 and 25 kg m-1, respectively), the volume loss with respect to initial undeformed net pen volume reached a maximum value of 53%. This occurred in the net pen firstly exposed to currents. Based on modeling results, a relationship between net pen volume loss due to the combined effects of both water current speed and linear weights of the sinker rings is proposed.

Keywords : net pen deformation; current speed; sinker ring; Chile.

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