Abstract

Six 0.02 ha ponds were used to evaluate Procambarus clarkii (Girard, 1852) production in ponds managed on a standard and delayed management schedule in 1988/89 and in 1989/90. Supplemental feed was offered when rice forage was depleted. Crayfish were harvested for 50 days, 25 days each during the rice forage and supplemental feeding phases. Rice forage production was significantly lower during the second culture year (1989/90). Crayfish harvested during the rice forage phase of the study were significantly larger than those harvested during supplemental feeding. Overall size of harvested crayfish decreased significantly as the harvest season proceeded as did the percentage of large crayfish (±95 mm total length) in the harvest. Crayfish production was significantly greater in ponds during the delayed management schedule, rice forage phase and the first culture year (1988/89). Variations in crayfish production may be explained within the context of forage availability and differences in population densities.

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