Effects of Salinity Fluctuation on the Growth and Energy Budget of Juvenile Litopenaeus vannamei at Different Temperatures
| Autor: | Shen Ma, Yuepeng Su, Cuimei Feng |
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| Rok vydání: | 2010 |
| Předmět: | |
| Zdroj: | Journal of Crustacean Biology. 30:430-434 |
| ISSN: | 1937-240X 0278-0372 |
| DOI: | 10.1651/09-3269.1 |
| Popis: | The effects of salinity fluctuation on the growth, molting and energy budget of juvenile Litopenaeus vannamei was investigated at the temperatures of 20, 25, and 30°C. Salinity fluctuation regimes were set in different amplitudes of ± 0, ± 5, ± 10 and ± 15 gL−1 from a control salinity of 20 gL−1. After a 48-day feeding trial, the lowest survival occurred at a salinity fluctuation of ± 15 gL−1 for each temperature investigated. The best growth of shrimp was obtained at salinity amplitudes of ± 5-10 gL−1 at 25 and 30°C. The salinity fluctuation influenced food conversion efficiency but not food intake. The shrimp maintained at salinity amplitudes of ± 5-10 gL−1 expended most of the energy for growth and spent less energy on respiration and excretion at 25 and 30°C. Therefore, salinity fluctuating amplitudes of ± 5-10 gL−1 result in higher growth rates than constant salinity conditions (20 gL−1) through enhanced feed assimilation and reduced energy loss in respiration and excretion. |
| Databáze: | OpenAIRE |
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