The potential of Asparagopsis armata to control the bacterial load associated to live feed to improve Seabream (Sparus aurata) larvae performance

Detalhes bibliográficos
Autor(a) principal: Castanho, Sara Isabel Costa
Data de Publicação: 2014
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.1/8327
Resumo: Dissertação de mestrado, Aquacultura e Pescas, Faculdade de Ciências e Tecnologia, Universidade do Algarve, 2014
id RCAP_30c6446eca4c9ce5a72eb7ef82ce6d6a
oai_identifier_str oai:sapientia.ualg.pt:10400.1/8327
network_acronym_str RCAP
network_name_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository_id_str 7160
spelling The potential of Asparagopsis armata to control the bacterial load associated to live feed to improve Seabream (Sparus aurata) larvae performanceAsparagopsis armataCarga bacterianaSparus aurataAlimento vivoDomínio/Área Científica::Engenharia e Tecnologia::Outras Engenharias e TecnologiasDissertação de mestrado, Aquacultura e Pescas, Faculdade de Ciências e Tecnologia, Universidade do Algarve, 2014Seaweeds are a source of bioactive compounds producing a large variety of metabolites with a broad spectrum of biological activities. This work attempted to understand the use of A. armata metabolites in larval rearing of Sparus aurata, assessing its development and larval quality, by reducing the bacterial load associated with the live feed. Two A. armata products (a laboratory made extract and a commercial powder, Ysaline®100 - YSA) were tested in Brachionus spp. and Artemia sp. at different concentrations. YSA at 0.5 % was selected to be used during 30 min with live feed. The gilthead seabream larvae trial comprised one treatment where live feed was bathed with YSA vs. a Control (bathed with clear water) (each n = 4). Larval quality parameters (growth, survival, swimbladder inflation, body anomalies and caudal fin development), digestive capacity (digestive system histology and enzymatic activity), immune response (lysozyme activity and cortisol concentration) and microbiological parameters were monitored. Fish larvae from YSA exhibited higher growth rate than Control (P < 0.05). A higher food intake or a reduction of the bacterial load might justify this result. Still, lower survival rates were observed for YSA. This result might be related with variations of the bacterial community or/and to a possible ichthyotoxic effect of A. armata metabolites carried by the live feed. Treatment with YSA also influenced the whole body cortisol since lower concentrations were observed for this group. Further research on how cortisol mechanisms are affected is required to fully understand its effects. Seabream larvae from YSA exhibited lower number of bacteria, either for larvae ability to prevent or reduce the bacteria colonization, which can be related to an enhancement of larval fitness, or to the possibility that A. armata metabolites were carried to the larvae. The reduction of the bacterial load accomplished with live feed immersed for 30 min in YSA improved S. aurata larvae fitness, although the effects are not fully understood.Ribeiro, LauraCosta, RodrigoSapientiaCastanho, Sara Isabel Costa2016-05-24T14:01:06Z201420142014-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10400.1/8327enginfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-24T10:19:35Zoai:sapientia.ualg.pt:10400.1/8327Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:00:31.461803Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv The potential of Asparagopsis armata to control the bacterial load associated to live feed to improve Seabream (Sparus aurata) larvae performance
title The potential of Asparagopsis armata to control the bacterial load associated to live feed to improve Seabream (Sparus aurata) larvae performance
spellingShingle The potential of Asparagopsis armata to control the bacterial load associated to live feed to improve Seabream (Sparus aurata) larvae performance
Castanho, Sara Isabel Costa
Asparagopsis armata
Carga bacteriana
Sparus aurata
Alimento vivo
Domínio/Área Científica::Engenharia e Tecnologia::Outras Engenharias e Tecnologias
title_short The potential of Asparagopsis armata to control the bacterial load associated to live feed to improve Seabream (Sparus aurata) larvae performance
title_full The potential of Asparagopsis armata to control the bacterial load associated to live feed to improve Seabream (Sparus aurata) larvae performance
title_fullStr The potential of Asparagopsis armata to control the bacterial load associated to live feed to improve Seabream (Sparus aurata) larvae performance
title_full_unstemmed The potential of Asparagopsis armata to control the bacterial load associated to live feed to improve Seabream (Sparus aurata) larvae performance
title_sort The potential of Asparagopsis armata to control the bacterial load associated to live feed to improve Seabream (Sparus aurata) larvae performance
author Castanho, Sara Isabel Costa
author_facet Castanho, Sara Isabel Costa
author_role author
dc.contributor.none.fl_str_mv Ribeiro, Laura
Costa, Rodrigo
Sapientia
dc.contributor.author.fl_str_mv Castanho, Sara Isabel Costa
dc.subject.por.fl_str_mv Asparagopsis armata
Carga bacteriana
Sparus aurata
Alimento vivo
Domínio/Área Científica::Engenharia e Tecnologia::Outras Engenharias e Tecnologias
topic Asparagopsis armata
Carga bacteriana
Sparus aurata
Alimento vivo
Domínio/Área Científica::Engenharia e Tecnologia::Outras Engenharias e Tecnologias
description Dissertação de mestrado, Aquacultura e Pescas, Faculdade de Ciências e Tecnologia, Universidade do Algarve, 2014
publishDate 2014
dc.date.none.fl_str_mv 2014
2014
2014-01-01T00:00:00Z
2016-05-24T14:01:06Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.1/8327
url http://hdl.handle.net/10400.1/8327
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
_version_ 1799133229944406016

Registros relacionados