NDLI: Cellular Biomarkers in Native and Transplanted Populations of the Mussel Perumytilus purpuratus in the Intertidal Zones of San Jorge Bay, Antofagasta, Chile

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Cellular Biomarkers in Native and Transplanted Populations of the Mussel Perumytilus purpuratus in the Intertidal Zones of San Jorge Bay, Antofagasta, Chile

Content Provider	Springer Nature Link
Author	Riveros, A. Zúñiga, M. Hernandez, A. Camaño, A.
Copyright Year	2002
Abstract	Cellular biomarkers were measured in the mussel Perumytilus purpuratus from intertidal zones of San Jorge Bay, Antofagasta, Chile. They were also used to measure sublethal effects on individuals exposed to Cu under laboratory conditions. Lysosomal stability in hemocytes, and the degree of vacuolization and the content of lipofuscin granules in digestive cells were the cellular responses measured. Three study sites were established in San Jorge Bay: Coloso, E.R., and Reference. Both E.R. and Coloso receive effluent discharges. Reference does not receive any sewage discharges. Before sampling, mussels from Reference were transplanted into the intertidal zone of each site. Samplings were obtained at the beginning, after 45 days, and after 90 days after transplantation. Seawater samples for total dissolved Cu analysis and adult mussels (P. purpuratus) from native and transplanted populations were collected each time. Cellular biomarkers and Cu concentrations in gonads, gills, and remaining tissues (gut and muscle) were measured. Mussels from Reference were exposed to sublethal Cu concentrations (5, 10, 20, 30, 40, and 80 μg L−1) during 45 days under laboratory conditions. Lysosomal stability was measured in mussel hemocytes by means of the neutral red retention assay. The degree of vacuolization and the extent of lipofuscin granules were determined in the digestive cells by image analysis of histological sections stained with the Schmorl's method. Seawater Cu concentrations and tissue Cu concentrations in P. purpuratus were higher in E.R. than in Reference and Coloso (p < 0.02). Native mussel populations from E.R. showed lower lysosomal stability (p < 0.05), higher vacuolization degree (p < 0.001), and lower amounts of lipofuscin granules (p < 0.001) than those from Coloso and Reference. Transplanted mussel to E.R. showed significant reduction in lysosomal stability (p < 0.05) and in extent of lipofuscin granules (p < 0.05) and significant increase in vacuolization degree (p < 0.05), whereas Reference and Coloso are not significantly dissimilar between them. Seawater Cu concentration was positively correlated with Cu content in gonads (r 2 = 0.61; p < 0.02), gills (r 2 = 0.66; p < 0.01), remaining tissues (r 2 = 0.56; p < 0.05), and the degree of vacuolization (r 2 = 0.65; p < 0.01) and negatively with lysosomal stability (r 2 = 0.79; p < 0.001) and lipofuscin granules extent (r 2 = 0.53; p < 0.05). Mussels exposed to Cu under laboratory conditions showed decreased lysosomal stability (over 30 μg Cu L−1) (p < 0.02) and increased degree of vacuolization (at 80 μg Cu L−1) (p < 0.05) and an increased lipofuscin granules extent (although differences among treatments were not statistically significant).
Starting Page	303
Ending Page	312
Page Count	10
File Format	PDF
ISSN	00904341
Journal	Archives of Environmental Contamination and Toxicology
Volume Number	42
Issue Number	3
e-ISSN	14320703
Language	English
Publisher	Springer-Verlag
Publisher Date	2002-03-01
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Pollution Health, Toxicology and Mutagenesis Medicine Toxicology

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