Microbial Quality of the Mussel Perna perna (Linne, 1758) Extracted from Guanabara Bay, Rio de Janeiro, Brazil

by A. N. Kosawa da Costa, Univ Federal do Rio de Janeiro, Ilha do Fundao, Brazil,
M. L. Sanchez-Nunez, Univ Federal do Rio de Janeiro, Ilha do Fundao, Brazil,
M. D. M. van Weerelt, Univ Federal do Rio de Janeiro, Ilha do Fundao, Brazil,
G. V. Fonseca Faria, Univ Federal do Rio de Janeiro, Ilha do Fundao, Brazil,
L. C. Mendonça-Hagler, Univ Federal do Rio de Janeiro, Ilha do Fundao, Brazil,
A. N. Hagler, Univ Federal do Rio de Janeiro, Ilha do Fundao, Brazil,



Document Type: Proceeding Paper

Part of: Coastal Zone '91

Abstract: Guanabara bay is an estuarine complex in the state of Rio de Janeiro with 12 cities including Rio de Janeiro and Niteroi on its shores. It has a hidrographic basin of 4000 Km2 with 35 major tributaries and 43 Km2 of mangroves. There are some 6000 medium to small industries, a large petroleum refinery, a commercial port, shipyards, and 16 marine oil terminals in the area. There is a daily discharge of 470 tons of sewage with only 64 of these recieving treatment or being discharged through a submarine outfall. In spite of these pollution problems Guanabara Bay produces 260 tons of fish and 20 tons of mussels per month, sustaining about 6000 fishermen. Mussels are harvested by primitive means along much of the bay shore and from small rocky islands and sold directly without depuration. Whole mussels concentrated coliforms about 100 times the level in lightly polluted and 10 times that in more polluted waters, and heterotrophic bacterial population of the mussel intestine was more than 10,000 that of water.

Subject Headings: Bays | Microbes | Developing countries | Water quality | Water pollution | Bacteria | Shores | Petroleum refining | Estuaries | Brazil | South America

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