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Master's Dissertation
DOI
https://doi.org/10.11606/D.21.2010.tde-02082011-135843
Document
Author
Full name
Darien Danielle Mizuta
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2010
Supervisor
Committee
Lemos, Daniel Eduardo Lavanholi de (President)
Brandini, Frederico Pereira
Ferreira, Jaime Fernando
Title in Portuguese
Contribuição do estudo oceanográfico para a produção comercial de ostras Crassostrea gigas: estudo de caso da Baía Sul, Ilha de Santa Catarina, SC
Keywords in Portuguese
clorofila a
maricultura
oceanografia
ostra Crassostrea gigas
Santa Catarina.
temperatura
Abstract in Portuguese
Os resultados da produção comercial de quatro lotes de 'Ostras do Pacífico', espécie Crassostrea gigas, correspondentes às safras dos anos 2005/06, 2006/07, 2007/08, 2008/09 foram obtidos de uma fazenda marinha localizada no sul da Ilha de Santa Catarina, no Estado que lidera a produção nacional de moluscos bivalves. Como o processo de engorda das ostras nestas áreas é totalmente realizado em águas marinhas, a relação das características do ambiente de cultivo e o sucesso da produção se fazem evidentes. Dados de temperatura superficial in situ, de concentração de clorofila a obtidos por sensoriamento remoto, de eventos de frentes frias e períodos de El Niño e La Niña foram analisados com o objetivo de estudar possíveis influências destas variáveis ambientais sobre o cultivo das ostras. Os resultados indicaram que os primeiros estágios de cultivo parecem ser decisivos para sobrevivência e rendimento final das safras. A temperatura parece ser o fator principal para a sobrevivência das ostras apresentando uma correlação negativa com a mesma, sendo a clorofila fator secundário, podendo, aparentemente, mitigar os efeitos negativos das altas temperaturas quando em concentrações elevadas. Para o desenvolvimento das ostras a clorofila foi o fator principal. Os eventos de frentes frias, associados a períodos de El Niño e La Niña, parecem influenciar na variação da clorofila na Baía Sul da Ilha de Santa Catarina.
Title in English
Contribution of the oceanographic study to the commercial production of oysters Crassostrea gigas: case study of South Bay, Santa Catarina Island, SC
Keywords in English
chlorophyll a and Santa Catarina
Crassostrea gigas oysters
mariculture
oceanography
temperature
Abstract in English
Results of four allotments from a commercial culture of the Pacific oyster, Crassostrea gigas, relative to the 2005/06, 2006/07, 2007/08 and 2008/09 crops were obtained from a marine farm located in the South of Santa Catarina Island, in the main national area for bivalve production. As the grow-out phase of those mollusks is completely performed in the marine environment, the relation between environmental characteristics and the culture success is made clear. In situ sea surface temperature data, remote sensing chlorophyll a concentration data, cold fronts events and El Niño and La Niña periods were evaluated in order to study possible influences of the environmental characteristics upon oyster performance. Results indicated the performance in the first stages as critical regarding both final survival and output of the crops. Temperature seems to be the main responsible factor for survival, based on a negative regression, whereas chlorophyll plays a secondary role in survival but apparently can mitigate the negative effects of elevated temperatures when available in elevated concentrations. On the other hand, chlorophyll is apparently the main factor for oyster development. Cold fronts events associated with El Niño and La Niña periods seem to influence chlorophyll variation in the South Bay of Santa Catarina Island.
 
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Publishing Date
2011-08-04
 
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