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What are rotifer? (Brachionus calyciforus Pallas)
Rotifers is zooplankton are valuable live food for the culture of the larvae of most fish species. Several characteristics of rotifers including their very small size around 50µ -120µ, have higher nutritional value. A digestive enzyme that is an element which fish can be used to help sub. Fish, especially the development of gastric juice is not complete. It also found that the composition of free amino acids, which fish can be used immediately ,relatively slow motility have contributed to their usefulness as good prey for active larvae (Lubzens et al., 1989). In addition, they have the habit of staying suspended in the water column, high reproductive rate and high density cultures. They can tolerate temperatures of between 15 and 31oC. The optimal pH is 6-8 at 25oC (Ludwig, 1993).
A single rotifer can become thousands of rotifer in a few days. Its primary mode of reproduction is called
parthenogenesis, which is a form of asexual reproduction. Usually when environmental conditions are suitable, female rotifers produce up to 7 eggs simultaneously, without any genetic input from a male rotifer. These eggs are genetically identical, and hatch to form new �daughter� rotifers within 12 h. By 18 h post hatching, the daughter rotifers begin to reproduce themselves, and egg production is maintained for up to a week or more.
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Analysis�
Crude Protein: 65.7%;
Ash: 9.4%
Crude Fiber: 4.5 %
Crude Fat: 7.4%;
Calcium: 0.9%;
Phosphorous: 0.65%
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Consists of a set
1. Freshwater Rotifer eggs (�2.5 grams) ready to hatch.
2. Food for growing.
3. Manual guide.
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