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Indução a desova de Crassostrea rhizophorae (GUILDING, 1828) (Bivalvia: Ostreidae) através de métodos físico-químicos em condições controladas / Physical and chemical induced spawning of Crassostrea rhizophorae (Guilding, 1828) (Bivalvia: Ostreidae) under controlled conditions
| Content Provider | Semantic Scholar |
|---|---|
| Author | Chagas, R. A. Herrmann, Marko |
| Copyright Year | 2015 |
| Abstract | Resumo O desenvolvimento da ostreicultura no estado do Para depende da producao e da coleta de sementes no meio ambiente, que nao e continua ao longo do ano, na area estudada. O que torna necessario a inducao a desova das ostras em condicoes laboratoriais. Neste estudo, foram avaliados os seguintes metodos simples e de baixo custo: (1) choques fisico-quimicos, alterando a temperatura e a salinidade da agua, injecao de solucao de (2) cloreto de magnesio hexahidratado e (3) de nicotina. Durante um periodo de nove horas as ostras nao responderam a nenhum dos estimulos, apresentando apenas contracoes musculares, sem a liberacao dos gametas. Esse fato ocorreu, possivelmente, pelas seguintes causas: estresse por fatores externos, a ausencia de aeracao constante e o periodo curto do experimento. Vale ressaltar que, foi a primeira vez que se testou os quimicos utilizados neste estudo, em tentativas de inducao a reproducao de bivalves. Almejando uma eficacia dos metodos utilizados neste estudo, sugere-se (1) uma aeracao constante durante todo o experimento para evitar estresse causado pela hipoxia, (2) assegurar que as ostras nao estao expostas as vibracoes externas, causadas por movimento ao redor dos recipientes e (3) repetir o experimento com um tempo experimental mais longo e (4) em outras epocas do ano quando as gonadas podem estar em fases mais avancadas de maturacao. Abstract The development of oyster culture in the state of Para depends on the production of seeds and their collection in the natural environment, which does not occur continuously throughout the year in the area of this study. Thus, it is required to induce spawning of oysters in laboratory conditions. In this study, was evaluated by the following simple and economical methods: (1) Physical and chemical shocks, changing the temperature and salinity of the water, injection of (2) magnesium chloride hexahydrate and (3) nicotine solution. Over a period of nine hours oysters not respond to any stimulation, presenting merely muscle contractions, lacking gamete releases. This fact occurred, following causes external stress factors, the absence of constant aeration and the short period of the experiment. It is noteworthy that, it was the first time that there were used these chemicals to induced spawning reproduction of oysters. Craving efficacy of used methods in this study, it is suggested (1) a constant aeration throughout the experiment to prevent stress caused by hypoxia, (2) ensure that oysters are not exposed to external vibrations, produced by movement around the experimental tanks and (3) repeating the experiment with a longer experimental time and (4) in other periods of the year, where gonads may be in more mature phase. |
| Starting Page | 24 |
| Ending Page | 30 |
| Page Count | 7 |
| File Format | PDF HTM / HTML |
| DOI | 10.2312/Actafish.2015.3.2.24-30 |
| Volume Number | 3 |
| Alternate Webpage(s) | http://www.benthos.eu/wp-content/uploads/pdfs/published-articles/10.2312-ActaFish.2015.3.2.24-30.pdf |
| Alternate Webpage(s) | https://seer.ufs.br/index.php/ActaFish/article/download/4713/4043 |
| Alternate Webpage(s) | https://doi.org/10.2312/Actafish.2015.3.2.24-30 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
