EVALUATION OF THE BAKER'S YEAST SACCHAROMYCES CERVISIAE AS A FOOD SUPPLEMENT FOR THE CLAM VENERUPIS AUREA | ||
| Egyptian Journal of Zoology | ||
| Article 1, Volume 64, Issue 64, December 2015, Pages 1-12 | ||
| Document Type: Original Research Papers | ||
| DOI: 10.12816/0019282 | ||
| Authors | ||
| Samya Hussein Mohammad* 1; Tayseer M. A. Abdel-Russol2 | ||
| 1Zoology department, Faculty of science, Port Said University, Port Said, Egypt | ||
| 2Botany Department, Faculty of Science, Suez Canal University, Ismailia, Egypt | ||
| Abstract | ||
| Bivalve aquaculture, that includes the cultivation of clams, is a growing source of food production all worldwide. No previous study has reported the relative food value of the yeast for the clam Venerupis aurea. The present study investigates the use of cheap and non-algal food (the baker's yeast Saccharomyces cervisiae) as a manipulated diet for the clam used in the study. A preliminary experiment was conducted to evaluate graded levels of dried baker's yeast as a supplement diet of the clam. This trial elucidated that the yeast with a ratio of 5% of the bivalve weight was suitable to enhance the growth of clams larger than 9 mm shell length. As the chemical treatment improves food value of the yeast (due to its homogenous yeast suspension), this level of yeast was added with and without chemical treatment in the basic experiment. The results exhibited obvious daily growth rate over the control in the largest size in case of the non-treated yeast. On the other hand, manipulation of the chemically treated yeast was suitable for small and moderate clam size. This may explain the clam behavior to get its nourishment. Hence, the present study proved that small clams are suspension feeders while the larger ones are deposit feeders. | ||
| Keywords | ||
| Clams cultivation; Baker's yeast; Food supplement; growth rate | ||
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