Mass culture of the rotiferBrachionus plicatilisand its evaluation as a food for larval anchovies
✍ Scribed by G. H. Theilacker; M. F. McMaster
- Book ID
- 104737152
- Publisher
- Springer-Verlag
- Year
- 1971
- Tongue
- English
- Weight
- 638 KB
- Volume
- 10
- Category
- Article
- ISSN
- 0025-3162
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✦ Synopsis
Growth rates of anchovy larvae, Engraulis mordax, reared for 19 days under constant environmental conditions on a diet of laboratory-cultured organisms, exceeded the growth rates of anchovies fed on a diet of wild plankton. The rotifer Brachionus plicatilis was found to be a nutritous food source when fed to the larvae in concentrations of 10 to 20/ml and in combination with the dinoflagellate Gymnodinium splendens (100/ml). Optimum conditions were determined for mass culture of the rotifer. A high food concentration was the most important parameter needed to assure a high yield of rotffers. Large volumes (464 l) of the unicellular flagellate DunalieUa sp. were cultured for feeding the rotifers. The rotifer culture technique described produces approximately 2.5 • 10 s organisms/day, providing a reliable food source for rearing studies. The lengths of B. plicatilis (without eggs) ranged between 99 and 281 ~, most rotifers being larger than t64 ~ and less than 231 ~. Individuals weighed 0A6 ~g and contained 8 • 10 -~ cal.