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Estudo da doença de inverno em dourada (Sparus aurata L.) de cultivo a sul de Portugal
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Authors
Advisor(s)
Abstract(s)
A dourada (Sparus aurata) de cultivo é afectada, durante os
períodos frios, por uma condição patológica denominada doença
de inverno ou síndroma de inverno. Esta patologia tem causado
perdas importantes e já foi identificada nos países do
Mediterrâneo, inclusivamente em Portugal. O objectivo deste
estudo consistiu na tentativa de identificação de bactérias e
parasitas, como possíveis agentes que causam este síndroma.
Durante o inverno de 1999/2000, as análises microbiológicas
permitiram identificar duas estirpes bacterianas nos indivíduos
analisados: Pseudomonas anguilliseptica e Aeromonas
salmonicida. Foram ainda detectadas três espécies de parasitas
externos (Trichodina spp., Fumestia echensis e epiteliocistosj e
uma espécie de parasita interno (Ceratomyxa spp.). Os
indicadores imunológicos e fisiológicos não demonstraram uma
imunossupressão nos indivíduos analisados durante os meses
mais frios, comparando com os indivíduos amostrados durante o
período quente. São discutidas algumas observações
relacionadas com a temperatura da água e com as condições de
cultivo.
Farmed gilthead sea bream [Sparus aurata) is affected, during cold periods, by a pathological condition refered as winter disease or winter syndrome. This syndrome is responsible by significant losses aiready identified in Mediterranean countries include Portugal. The search for possible bactéria and parasites as cause agents of this syndrome was the objective of this study. During winter 1999/2000 the microbiology analyses avoid to indentify two bactéria in the analysed fish: Pseudomonas anguilliseptica and Aeromonas sálmonicida. Three species of extern parasites was detected (Trichodina sp., Fumestinia echensis and epiteliocistesj and one specie of intern parasite (Ceratomyxa spp.). Immunological and physiological indicators doesn't demonstrated a severe immunosuppression in fish samples during the winter months, compared with those sampled during warmer periods. The observations are discussed in relation to water temperaturas and to rearing conditions.
Farmed gilthead sea bream [Sparus aurata) is affected, during cold periods, by a pathological condition refered as winter disease or winter syndrome. This syndrome is responsible by significant losses aiready identified in Mediterranean countries include Portugal. The search for possible bactéria and parasites as cause agents of this syndrome was the objective of this study. During winter 1999/2000 the microbiology analyses avoid to indentify two bactéria in the analysed fish: Pseudomonas anguilliseptica and Aeromonas sálmonicida. Three species of extern parasites was detected (Trichodina sp., Fumestinia echensis and epiteliocistesj and one specie of intern parasite (Ceratomyxa spp.). Immunological and physiological indicators doesn't demonstrated a severe immunosuppression in fish samples during the winter months, compared with those sampled during warmer periods. The observations are discussed in relation to water temperaturas and to rearing conditions.
Description
Dissertação de mest. em Aquacultura, Faculdade de Ciências do Mar e do Ambiente, Univ. do Algarve, 2003
Keywords
Doença de Inverno Patologia Aquacultura Dourada