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Chlorinated hydrocarbons in coastal lagoons of the Pacific coast of Nicaragua

Carvalho, F.P ; Montenegro-Guillen, S ; Villeneuve, J.P ; Cattini, C ; Bartocci, J ; Lacayo, M ; Cruz, A

Archives of environmental contamination and toxicology, 1999-02, Vol.36 (2), p.132-139 [Periódico revisado por pares]

Heidelberg: Springer-Verlag

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Título:
Chlorinated hydrocarbons in coastal lagoons of the Pacific coast of Nicaragua
Autor: Carvalho, F.P ; Montenegro-Guillen, S ; Villeneuve, J.P ; Cattini, C ; Bartocci, J ; Lacayo, M ; Cruz, A
Assuntos: Animal, plant and microbial ecology ; Animals ; Applied ecology ; aquatic organisms ; Biological and medical sciences ; Bivalvia - metabolism ; Decapoda (Crustacea) - metabolism ; Ecosystem ; Ecotoxicology, biological effects of pollution ; environmental degradation ; Fundamental and applied biological sciences. Psychology ; Hydrocarbons ; Hydrocarbons, Chlorinated - analysis ; Hydrocarbons, Chlorinated - toxicity ; Marine and brackish environment ; Perciformes - metabolism ; Pesticides ; Pesticides - analysis ; Pesticides - toxicity ; pollution ; Sediments ; waste management
É parte de: Archives of environmental contamination and toxicology, 1999-02, Vol.36 (2), p.132-139
Notas: ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
Descrição: A screening for persistent chlorinated hydrocarbons was carried out in December 1995 in the main coastal lagoons on the Pacific side of Nicaragua, where most of the country's agriculture and pesticide use has been taking place for decades. Results for a wide range of organochlorine pesticides in lagoon sediments show levels that generally were very low in Estero Real, Estero Padre Ramos, and estuary of San Juan del Sur. For example, total DDTs in these lagoons averaged 4.5 +/- 3.4 ng g-1 dry weight, which may be considered a baseline level for the region. Other compounds such as HCHs, BHC, endosulfan, heptachlor, endrin, toxaphene, and aroclors were present in concentrations even lower, generally below 1 ng g-1 dry weight. However, sediments of the Esteros Naranjo-Paso Caballos system at Chinandega district contained pesticide residues in much higher levels, attaining maximum values of 1,420 ng g-1 and 270 ng g-1 dry weight, respectively, for toxaphene and total DDTs. Other compounds such as aroclors, chlordane, endosulfan, and dieldrin were also present in the sediments of this lagoon system, but in lower concentrations. The very high concentrations of toxaphene and DDTs in this lagoon are a result of the intensive use of these pesticides in cotton growing in the district of Chinandega. Due to the long environmental half-lives of these compounds (t(1/2) > 10 years in temperate soils), their concentrations in lagoon sediments will likely remain high for years to come. Based on these results, the development of the new shrimp farming activities in the Pacific coastal lagoons should be restricted to selected areas.
Editor: Heidelberg: Springer-Verlag
Idioma: Inglês

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Chlorinated hydrocarbons in coastal lagoons of the Pacific coast of Nicaragua

Carvalho, F.P ; Montenegro-Guillen, S ; Villeneuve, J.P ; Cattini, C ; Bartocci, J ; Lacayo, M ; Cruz, A

Heidelberg: Springer-Verlag

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