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Master's Dissertation
DOI
10.11606/D.21.2016.tde-12092016-101126
Document
Author
Full name
Jessica Batista dos Santos
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2016
Supervisor
Committee
Sousa, Eduinetty Ceci Pereira Moreira de (President)
Cesar, Augusto
Gomes, Vicente
Title in Portuguese
Qualidade ecotoxicológica do sedimento de Caraguatatuba, SP
Keywords in Portuguese
Leptocheirus plumulosus
Lytechinus variegatus
Nitokra sp
Tiburonella viscana
Caraguatatuba
Ecotoxicologia
Toxicidade aguda
Toxicidade crônica
Abstract in Portuguese
A região de Caraguatatuba encontra-se exposta a duas fontes mais significativas de poluição marinha: efluentes domésticos e derramamentos de petróleo, principalmente pela proximidade com Canal de São Sebastião. O presente estudo objetivou avaliar a qualidade do sedimento da região por meio de ensaios ecotoxicológicos com sedimentos coletados em 21 pontos, no inverno e no verão. Foram realizados ensaios de toxicidade aguda com sedimento total usando os anfípodos Tiburonela viscana e Leptocheirus plumulosus, de toxicidade crônica avaliada pela eclosão de ovos do copépodo Nitokra sp, e de interface sedimento/água com embriões do equinodermata Lytechinus variegatus. O maior número de amostras com toxicidade foi observado na campanha de verão, e o organismo que se mostrou mais sensível foi L. variegatus. Os resultados demostraram maior toxicidade nos sedimentos próximos à planície de maré e saída do Canal de São Sebastião, ao sul, e próximo à Praia de Tabatinga, extremo norte do município. Esta distribuição de pontos com toxicidade segue o padrão de deposição de partículas provenientes do Canal de São Sebastião e se aproxima dos resultados de qualidade sanitária da região.
Title in English
Ecotoxicological sediment quality Caraguatatuba, SP
Keywords in English
Leptocheirus plumulosus
Lytechinus variegatus
Nitokra sp
Tiburonella viscana
Acute assay
Caraguatatuba
Chronic assay
Ecotoxicology
Abstract in English
The Caraguatatuba region is exposed to two significant sources of marine pollution: domestic sewage and oil spills, mainly due to the proximity of the São Sebastião Channel. This study aimed to evaluate the sediment quality of the region through ecotoxicological tests with sediment and sediment / water interface, collected in 21 points, in winter and summer. Acute toxicity tests were conducted with total sediment using the amphipods Tiburonela viscana and Leptocheirus plumulosus, chronic toxicity was evaluate in hatching eggs with the copepod Nitokra sp, and sediment / water interface with Echinodermata Lytechinus variegatus embryos. The largest number of toxic points was obtained in the summer campaign, and the more sensitive organism was L. variegatus. Results showed greater toxicity close to tidal plain and in the São Sebastião Channel mouth, at soul, and next Tabatinga Beach, at northern edge of the municipality. This distribution of toxic points follows the pattern of particle deposition from the São Sebastião Channel, and approaches the results of sanitary quality in the region.
 
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Publishing Date
2016-09-12
 
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