Faecal bacteria in Perna perna (Linnaeus, 1758) (Mollusca: Bivalvia) for biomonitoring coastal waters and seafood quality

Authors

  • Diego Igawa Martinez Universidade Estadual Paulista Júlio de Mesquita Filho; Campus Experimental do Litoral Paulista
  • Ana Júlia Fernandes Cardoso de Oliveira Universidade Estadual Paulista Júlio de Mesquita Filho; Campus Experimental do Litoral Paulista

DOI:

https://doi.org/10.1590/S1679-87592010000700005

Keywords:

Perna perna, fecal bacteria, Enterococci, Thermotolerant Coliforms, clearance, biomonitoring

Abstract

Urban development in coastal areas is intense and leads to the increase of sewage outfall and other negative impacts as consequences. Thus, stringent regulations establishing limits to the microbiological contamination of water and seafood are needed. The objective of this study is to evaluate the usefulness of Enterococci and Thermotolerant Coliform densities in the flesh of mussels Perna perna as an alternative tool for monitoring the microbiological quality of coastal waters. The study also considers allometric relations applied to clearance rates to understand rates of bacterial concentration. Bacterial loads obtained in mussels' flesh were from 50 to 4,300 times greater than in the water sampled in the vicinity of the mussels and some were considered inappropriate for consumption even when the water presented no restrictions. The mean clearance rate obtained for Enterococci retention was 317.7 ml h-1 and this rate (CR) is related to the mussels' size (L) by the equation CR = 28.3229L1.6421. The results showed that bacterial densities in the mussels' tissues may reflect chronic contamination of the environment and that clearance rates are important for taking the best decision in situations where, for example, it is desired to introduce mussels for aquaculture and the evaluation of the water concerned is required.

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Published

2010-06-01

How to Cite

Martinez, D. I., & Oliveira, A. J. F. C. de. (2010). Faecal bacteria in Perna perna (Linnaeus, 1758) (Mollusca: Bivalvia) for biomonitoring coastal waters and seafood quality . Brazilian Journal of Oceanography, 58(spe3), 29-35. https://doi.org/10.1590/S1679-87592010000700005

Issue

Section

naodefinida