Abstract
ABSTRACTThis analysis utilized primary data obtained from Texas A&M University Mariculture Research stations to estimate density dependent growth equations for two species of penaeid shrimp, Penaeus stylirostris and P. vannamei. A simulation model was developed based on these equations, in order to evaluate the effect of alternate stocking densities and cropping schemes on individual weight, total product, gross revenue, total feed consumption, cost of feed and postlarvae, as well as revenue above selected costs (RASC). For each species, an analysis over the growing season of those management schemes yielding the greatest RASC was presented. In addition, the growth equation was re‐estimated based on modified data in order to evaluate sensitivity on RASC. The effect of a 30‐day reduction in the growing season on RASC was also analyzed.P. stylirostris growth was more sensitive to stocking density than that of P. vannamei. For P. stylirostris, maximum RASC was obtained by stocking 98,800 individuals/ha. A slightly lower density of 86,450/ha resulted in a negligible decrease in RASC, but may be preferable due to decreased risk. For P. vannamei, a density of 135,850 shrimp/ha yielded maximum RASC. For both species, production of one crop per year was found to maximize RASC.
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