Appendix E: Field Scientist Report 



samples (Crassostrea rizhophorae) were collected at this site from stations about 300 meters apart. 



A third sample (Mytella guayanensis) was obtained from a second site located near the mouth of 



the Coto River on the opposite side of the city. Mussels were collected from within the roots of 



mangroves. Access to both sites is by car. 



Contamination:: Industrial and domestic effluents, port activities and fisheries were observed at the 



first site. No sources of contamination were observed at the second location other than the Coto 



River which runs through part of the city of Fortaleza. 



Sao Luis (03/25/92). Duplicate mussel samples {Mytella guayanensis) were collected from 2 



stations, during low tide, at the Lagoa da Jensen located to the east of San Marcos Bay. Mussels 



were collected from the mud within the mangroves. The site is located within city limits and access 



is by foot. 



Contamination:: Domestic effluents. Cholera. 



Belem/Braganca (03/26/92). Bivalves could not be found near Belem. The nearest mussel 



producing area was found near Braganca, located about 100 km to the north of Belem. Mussels 



were obtained from fishermen working in the area. 



Contamination:: Amazon river. Cholera. 



Vitoria (03/29/92). Duplicate mussel samples (Pernaperna) were collected from 2 stations in 



Vitoria Bay, located within city limits. Access to the site is by foot, or by boat. 



Contamination:: Port activities. Oil refineries. Industrial and domestic effluents. At the time of 



sampling, swimming in the area was restricted because of contaminated waters. 



Cabo Frio (03/30/92). Duplicate mussel samples (Pernaperna) were collected from 3 different 



stations during low tide. Access to the site is by boat. 



Contamination:: This is fairly isolated area. Some port activity. Small fisheries. Water circulation 



might bring wastes from oil producing platforms working in coastal waters. 



Guanabara Bay/Niteroi (03/31/92). This site was sampled on the way to the Rio de Janeiro 



Airport while transferring from Cabo Frio to Pontal do Sul. Duplicate mussel samples were 



collected from a rocky formation in front of the city of Niteroi. Mussels were kept in a cooler and 



shucked in Pontal do Sul about 10 h. later. Mussels were tightly closed at the time of processing. 



Contamination:: Industrial and domestic effluents. Petroleum-related activities. Port. This area is 



considered to be one of the most polluted areas in Brazil. 



Paranagua (04/01/92). Duplicate mussel samples were collected from 2 stations in Laranjeiras 



Bay. Samples were collected by hand from mussels bed located in the inner portion of the bay 



(0.5-1.0 water depth). This site is located about 1 h. from Pontal do Sul and the city of 



Paranagua. Access to the sampling stations is by boat. 



Contamination:: This seems to be a fairly pristine area of the Paranagua/Laranjeiras Bay system. 



14 



