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Publication
Avaliação da condição em cativeiro do pepino do mar, Holothuria arguinensis, e otimização do crescimento
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Abstract(s)
A procura por espécies de holotúrias europeias têm aumentado. Holothuria arguinensis
é uma espécie promissoras de produzir em aquacultura. O principal objetivo deste trabalho é
contribuir para a otimização do cultivo de Holothuria arguinensis, nomeadamente para o seu
crescimento e condição em cativeiro. Para otimizar o seu crescimento foi realizado um ensaio
nutricional que consistiu na administração de 3 dietas que consistiam em substratos
enriquecido com macroalgas, nomeadamente: Sargassum vulgare (controlo), Ulva lactuca e
Porphyra dioica. O tratamento com Sargassum vulgare demostrou ser promissor, obtendo
resultados bastante superiores no peso e comprimento quando comparado com as restantes.
Para avaliar a condição e efeitos do acondicionamento de adultos de Holothuria arguinensis
foi analisado o seu sistema imune. Foi retirado líquido celómico de indivíduos com diferentes
proveniências (selvagem e cativeiro), realizadas contagens celulares e análises de parâmetros
imunes. Este estudo é uma primeira abordagem ao tema e demostrou ser promissora. Os
resultados obtidos demostraram que parece existir perda de condição nos indivíduos de
cativeiro, no entanto, são precisos mais estudos para confirmar essa afirmação. Estes ensaios
constituem um avanço na otimização de produção e domesticação da espécie, mais estudos
nestas áreas são essenciais para a produção com sucesso em cativeiro.
The search for European sea cucumbers has been on the rise. Holothuria arguinensis is a promising species for aquaculture production. The main goal of this study is contributing to the optimization of Holothuria arguinensis production, mainly its growth and living conditions in captivity. To optimize its growth a nutritional trial was performed which consisted in the administration of three diets based on macroalgae enriched substrates, namely: Sargassum vulgare (control), Ulva lactuca e Porphyra dioica. The Sargassum vulgare treatment demonstrated to be promising, achieving much higher results in weight and growth when compared with the other treatments. To evaluate the condition and effect of the adaptability of Holothuria arguinensis adults an analysis was performed to its immune system. The celomic liquid was retrieved from individuals from different environments (wild and captivity), used in cellular counting and analysis to its immune parameters. This study covers the first attempt at this theme and showed to be promising. The achieved results showed an apparent loss in condition in the individuals from captivity, nevertheless, further research must be made to back said statement. These trials constituted in the improvement of the species production and domestication, further research in these areas is essential to improve its success rate in captivity.
The search for European sea cucumbers has been on the rise. Holothuria arguinensis is a promising species for aquaculture production. The main goal of this study is contributing to the optimization of Holothuria arguinensis production, mainly its growth and living conditions in captivity. To optimize its growth a nutritional trial was performed which consisted in the administration of three diets based on macroalgae enriched substrates, namely: Sargassum vulgare (control), Ulva lactuca e Porphyra dioica. The Sargassum vulgare treatment demonstrated to be promising, achieving much higher results in weight and growth when compared with the other treatments. To evaluate the condition and effect of the adaptability of Holothuria arguinensis adults an analysis was performed to its immune system. The celomic liquid was retrieved from individuals from different environments (wild and captivity), used in cellular counting and analysis to its immune parameters. This study covers the first attempt at this theme and showed to be promising. The achieved results showed an apparent loss in condition in the individuals from captivity, nevertheless, further research must be made to back said statement. These trials constituted in the improvement of the species production and domestication, further research in these areas is essential to improve its success rate in captivity.
Description
Keywords
Aquacultura Aquaculture Macroalgas Macroalgae Alimentação Feed Sedimento enriquecido Sediment enrichment Líquido celómico Coelomic fluid Imunidade Immunity