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Enhanced growth of the pleasure oyster Crassostrea corteziensis cultured under integrated multi-trophic aquaculture (IMTA) concept, using farm effluents of shrimp Penaeus vannamei

Abstract:

Most studies using Integrated Multi-Trophic Aquaculture (IMTA) systems in shrimp aquaculture have assessed the feasibility of culturing non-native bivalve species. However, studies including native species are limited and could represent a better alternative since these organisms are adapted to local environmental conditions and do not represent a sanitary risk. Therefore, we assessed the growth performance of the native oyster Crassostrea corteziensis in IMTA system with a Mexican shrimp farm. The study included three grow-out cycles (starting in October, November and December), three stocking densities (low, medium and high), and three positions of the Nestier®-like tray (top, middle and bottom), in a drainage channel connected to a shrimp farm located in a mangrove zone. From all experimental conditions, the larger wet weight (WW) and shell length (SL) values were registered in October grow-out cycle, associated to warmer temperatures, from oysters at medium stocking density and at the top position (WW: 110.1 ± 3.6 g; SL: 91.3 ± 1.5 mm). These results suggest that grow-out cycle, stocking density and position of oysters in the Nestier®-like trays highly influence the performance of the cultured oyster. Additionally, C. corteziensis growth can be improved by using IMTA systems consisting of shrimp farm effluents.