Influência da salinidade sobre a sobrevivência da ostra-do-mangue, Crassostrea rhizophorae
The effect of salinity on the survival of spats of mangrove oyster, Crassostrea rhizophorae, was tested by means of 12 treatments in triplicates corresponding with 5%-intervals over a 5 - 60%o range, with measurements taken during 8 days of cultivation. Each experimental units was stocked with 40 oy...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2008 |
| País: | Brasil |
| Institución: | Universidade Federal do Ceará (UFC) |
| Repositorio: | Repositório Institucional da Universidade Federal do Ceará (UFC) |
| Idioma: | portugués |
| OAI Identifier: | oai:repositorio.ufc.br:riufc/53771 |
| Acceso en línea: | http://www.repositorio.ufc.br/handle/riufc/53771 |
| Access Level: | acceso abierto |
| Palabra clave: | Espécie- Crassostrea rhizophorae Sobrevivência Cultura-ostras |
| Sumario: | The effect of salinity on the survival of spats of mangrove oyster, Crassostrea rhizophorae, was tested by means of 12 treatments in triplicates corresponding with 5%-intervals over a 5 - 60%o range, with measurements taken during 8 days of cultivation. Each experimental units was stocked with 40 oyster spats averaging 1.17 ± 0.12 cm in length, fed daily with 250,000 cel.mL-1 of Chaetoceros muelleri. Results were given as survival rates, together with daily observations on oxygen concentration (mg.L-1 and saturation) and water temperature (°C). The data were analyzed by the ANOVA and Tukey tests. Significantly higher survival values were observed in 15%o, 20%o e 25%o salinity values, whereas as 5%o, 10%o, 30%o and 35%o determined lower survival rates along the experiments and did not differ significantly at the end of the cultivation period. Total mortality of the reared stock started after the 4th day under salinities above 40%o. Results from the present study indicate that C. rhizophorae should be farmed in estuarine areas where salinity varies from 15%o to 25%o |
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