In Brazil, malacoculture is developed mainly in the state of Santa Catarina, followed by São Paulo and Rio de Janeiro. In the course of the development of Brazilian mariculture, legislation has addressed the sanitary requirements necessary for bivalve commercialization. However, monitoring phycotoxins is a challenge, due to often costly reference methods. In this context, this study evaluated the use of alternative ecotoxicological and bioanalytical methods using Artemia franciscana (brine shrimp) lethality assessments. The results confirm that, although correlations between the reference mouse assay and the brine shrimp assays were not high, the alternative brine shrimp assay may be incorporated into phycotoxin monitoring programs, as hepatopancreas methanolic extracts of mussel (Perna perna) containing DSP resulted in high lethality rates. Therefore, further methodological adjustment studies and the inclusion of other enzymatic and toxicological models are required to further assess these differences, and associations between ecotoxicological methods as early-alarm methods are encouraged.
Boletim do Observatório Ambiental Alberto Ribeiro Lamego, Campos dos Goytacazes/RJ, v.9 n.1, p. 119-139, jan./jun. 2015 those bodies is necessary in order to ensure product quality in the market. Among the contaminants of these animals, the phycotoxins -toxins produced by microalgae stand out. This study presents aspects of the cultivation of bivalve molluscs, the major syndromes caused by phycotoxins accumulated in bivalve molluscs, studies on harmful algae monitoring conducted in other countries, and the Brazilian legislation relevant to the subject. We emphasize some difficulties in implementing the harmful algae monitoring program in Arraial do Cabo/RJ. Future aquaculture activities in the region will need this information, as well as coordinated actions between the government and fish farmers, so that they can act to control the quality of production of bivalve molluscs.
As algas são organismos eucariotos fotoautotróficos relativamente simples que não possuem tecidos. As proliferações de certas algas microscópicas podem causar diversos efeitos que são percebidos pelo homem como nocivos. O objetivo deste estudo foi monitorar a comunidade fitoplanctônica em pontos próximos ao cultivo de mexilhões da Praia Rasa, com ênfase em espécies potencialmente produtoras de toxinas. As coletas foram realizadas entre fevereiro de 2014 e março de 2015. 79 táxons foram encontrados. As diatomáceas foram predominantes neste estudo. Separações entre verão e inverno foram registradas. Este trabalho poderá servir de base para futuras ações de monitoramento de florações de algas nocivas na cidade.
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