Perfil nutricional do Poliqueta laeonereis acuta (Treadwell, 1923): alternativa de alimento para aquicultura

Abstract

The species Laeonereis acuta, is a detritivore nereidid found in estuarine regions with sandy and silty sediments. The distribution occurs on the Atlantic coast of American continent, from Recife (Brazil) to the Valdez Peninsula (Argentina). In addition to the ecological role, polychaetes are used in ecotoxicological studies, as fishing baits and as feed for aquatic organisms. Therefore, the aim was to analyze the nutritional profile of the wild L. acuta and to evaluate its potential as feed in aquaculture. Samples of polychaetes (200 g) were carried out in the intertidal regions of Santo Antônio dos Anjos Lagoon, in Laguna (Santa Catarina, Brazil), between the months of February and June 2018. The centesimal composition of L. acuta showed a percentage of protein (67.5%) superior to that found in several species of polychaetes. Regarding total lipids, the percentage of 6.6% of the present study was similar to the minimum values (6.6%) found in studies with wild polychaetes. However, further studies are needed regarding the nutritional profile of different populations of this species and in other environmental conditions. The use of L. acuta is recommended as a complementary source to a balanced diet to meet the nutritional needs of aquaculture species.