Effect of Un-live Microalgal diet, Nannochloropsis oculata and Arthrospira (Spirulina) platensis, Comparing to Yeast on Population of Rotifer, Brachionus plicatilis | ||||
| Mediterranean Aquaculture Journal | ||||
| Article 5, Volume 7, Issue 1, December 2015, Page 48-54 PDF (454.29 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/maj.2015.4632 | ||||
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| Authors | ||||
| Ahmed Heneash1; Mohamed Ashour2; Mustafa Matar3 | ||||
| 1Hydrobiology Lab., Alexandria Branch, Marine Environment Division, National Institute of Oceanography and Fisheries (NIOF), Egypt. | ||||
| 2Invertebrate Aquaculture Lab., Aquaculture division, Alexandria Branch, (NIOF) | ||||
| 3El-Max Research Station, Alexandria Branch, Alexandria Branch, Aquaculture Division, (NIOF) | ||||
| Abstract | ||||
| Rotifers Brachionus plicatilis are the most common zooplankton used to rear eairly larvae of marine shrimp and finfish. Reduce production cost of live food in marine hatcheries is considered one of the main targets for developing a marine aquaculture industry. The present study is conducted to investigate the population (as increase in number) and population growth rate of rotifer Brachionus plicatilis fed on un-live microalgal diet, frozen Nannochloropsis oculata (FN) and dried Spirulina platensis (DS), comparing to dried baker's yeast Saccharomyces cerevisiae (Y) in four treatment; alone for each diet and mixing between S. platensis + yeast and yeast: (FN, DS, DS+Y, and Y). The experiment was continued for 12 day in batch culture system with initial rotifer population 100/ind./ml. The lowest average in population and population growth rate were observed in rotifer fed on SD (122.90±43.38 Ind./ml and 0.137 ind./day, respectively), while the highest RFN and Rr were observed in Y (182.24±43.89 ind./ml and 0.569 ind./day), followed by DS + Y (166.00 ± 32.58 Ind./ml and 0.486 ind./day) and FN (130.09 ± 21.51 ind./ml and 0.251 ind./day, respectively). In general, Baker’s yeast is cheap and readily available; in contrast, microalgae (fresh, freezed and dried) are laborious, time consuming and expensive. Baker's yeast S. cerevisiae has also been successfully used for rotifers with high population and population growth rate. | ||||
| Keywords | ||||
| Rotifer; Brachionus plicatilis; N. oculata; S. platensis; yeast | ||||
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