Multi-Stage Rotational Stocking and Harvesting System for Year-Round Culture of the Freshwater Prawn, Macrobrachium Rosenbergii

摘要

The drawbacks of the continuous stocking and harvesting management system that is practiced in rarely drained commercial prawn ponds are described. An alternative management system is predicated on variable density culture during growout stages, stock division, manipulation, and size-grading. Results of laboratory-level experimentation suggest that the degree of animal to animal competition that develops within populations is underestimated under the current management system; large animals suppress the growth of smaller ones which have a high compensatory growth potential once they are consistently and periodically removed into their own size-classes.