Organochlorine pesticides (OCs) and polychlorinated biphenyls (PCBs) in sediments and crabs (Chasmagnathus granulata, Dana, 1851) from mangroves of Guanabara Bay, Rio de Janeiro State, Brazil.
Organochlorinated compounds, seven indicator PCB congeners, DDT and its main metabolites, were determined in sediment and crab (Chasmagnathus granulata) samples collected from mangrove areas near Rio de Janeiro, Brazil. Samples were analysed according to the FAO/SIDA protocols using continuous non-polar solvent extraction and a conventional GC-ECD apparatus. The highest levels of total PCB congeners and total DDT metabolites in sediments (184.16 and 37.40 ng g(-1)d.w. respectively) and crab eggs (570.62 and 98.22 ng g(-1)d.w. respectively) were found at impacted mangroves. The higher PCB congeners than DDT metabolites levels suggesting a stronger industrial impact in this area. The results indicate that the population density of crab is negatively affected by sediment contamination that is reflected basically by the organochlorine content in the female eggs. The organochlorine concentration in eggs is more significant to evaluate or estimate an impact of these pollutants upon C. granulata population than the organochlorine concentration in sediment samples.
de Souza
Alexandre Santos
AS
Laboratório de Radioisótopos, Instituto de Biofísica, Universidade Federal do Rio de Janeiro, Postal: 21941-900 Rio de Janeiro, RJ, Brazil.
Torres
João Paulo Machado
JP
Meire
Rodrigo Ornellas
RO
Neves
Rafael Curcio
RC
Couri
Márcia Souto
MS
Serejo
Cristiana Silveira
CS
D000818:Animals; D003386:Brachyura / Q000033:anatomy & histology / Q000737:chemistry* / Q000187:drug effects / Q000254:growth & development; D001938:Brazil; D016000:Cluster Analysis; D005260:Female; D019015:Geologic Sediments / Q000737:chemistry*; D006843:Hydrocarbons, Chlorinated / Q000032:analysis* / Q000633:toxicity; D010063:Ovum / Q000737:chemistry / Q000187:drug effects; D010575:Pesticides / Q000032:analysis* / Q000633:toxicity; D011078:Polychlorinated Biphenyls / Q000032:analysis* / Q000633:toxicity; D011156:Population Density; D025341:Principal Component Analysis
D006843:Hydrocarbons, Chlorinated; D010575:Pesticides; D011078:Polychlorinated Biphenyls