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Publication
Optimization for the larvae rearing protocol of Lythrypnus dalli in Oceanário de Lisboa
Advisor(s)
Abstract(s)
Com a sobre-exploração de populações selvagens de peixes ornamentais para alimentar o mercado da aquariofilia, as mesmas correm o risco de entrar em extinção. Instituições como o Oceanário de Lisboa têm investido em estudos que tentam recolher o máximo e informação sobre o ciclo de vida de peixes ornamentais, de modo a que se possam estabelecer protocolos de reprodução. Deste modo, com a criação em cativeiro de peixes ornamentais, evita-se o impacto negativo nas populações de peixe selvagem.
Este estudo visa testar o uso de três tipos de alimento vivo, Rotíferos, Artémia e Copépodes, relacionando estes com a taxa de sobrevivência das larvas de Lythrypnus dalli, baseando-se no protocolo de reprodução criado anteriormente por Archembeault. A espécie de copépode usada foi diferente, sendo esta Acartia tonsa, podendo resultar em dados diferentes do trabalho referido. Foram também realizados registos fotográficos do desenvolvimento embrionário e larval, o que permitiu concluir que os mesmos resultados estavam a ser obtidos.
Dos tipos de alimento usado, os copépodes mostraram ter um efeito significativo, que com o trabalho de Archembeault mais os registos fotográficos realizados, se confirma ser o melhor tipo de alimento vivo a usar para esta espécie.
Palavras
With the overexploitation of wild populations of ornamental fish to feed the aquarium market, they are in danger of becoming extinct. Institutions such as the Oceanário de Lisboa have invested in studies that try to collect as much information as possible about the life cycle of ornamental fish, so that reproduction protocols can be established. In this way, by having captive creations of ornamental fish, the negative impact on wild fish populations is avoided. This study aims to test the use of three types of live food, Rotifers, Brineshrimp and Copepods, relating these to the survival rate of Lythrypnus dalli larvae, based on the reproduction protocol previously created by Archembeault. The species of copepod used was different, these being Acartia tonsa, which may result in different data from the based work. Photographic records of embryonic and larval development were also carried out, in order to realize that the same results were being obtained. Of the types of food used, copepods were shown to have a significant effect, which after reviewing the work of Archembeault, plus the photographic records carried out, confirmed that copepods are the best type of live food to use for this species.
With the overexploitation of wild populations of ornamental fish to feed the aquarium market, they are in danger of becoming extinct. Institutions such as the Oceanário de Lisboa have invested in studies that try to collect as much information as possible about the life cycle of ornamental fish, so that reproduction protocols can be established. In this way, by having captive creations of ornamental fish, the negative impact on wild fish populations is avoided. This study aims to test the use of three types of live food, Rotifers, Brineshrimp and Copepods, relating these to the survival rate of Lythrypnus dalli larvae, based on the reproduction protocol previously created by Archembeault. The species of copepod used was different, these being Acartia tonsa, which may result in different data from the based work. Photographic records of embryonic and larval development were also carried out, in order to realize that the same results were being obtained. Of the types of food used, copepods were shown to have a significant effect, which after reviewing the work of Archembeault, plus the photographic records carried out, confirmed that copepods are the best type of live food to use for this species.
Description
Thesis presented at ISPA – Instituto Universitário to obtain the Master’s degree in Marine Biology and Conservation.
Keywords
Alimentação Archambeault Rotíferos Copepodes Artémia Acartia tonsa Oceanário de Lisboa desenvolvimento embrionário e larval Live food Rotifers Brineshrimp embryonic and larval