Study of the Juvenile Shrimp Populations of the Galveston Bay System
Moffett, Alan W.
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Seasonal abundance and sizes of juvenile brown shrimp, Penaeus aztecus, and white shrimp, Penaeus setiferus, in the Galveston Bay and Sabine Lake areas were studied using samples taken semi-monthly in tertiary, secondary and primary bays. The first and largest wave of brown shrimp appeared in mid-April. Two smaller waves followed. White shrimp were detected in June. The first wave was small, but was followed by two larger waves. Most brown shrimp emigrated to the Gulf before they were 100 mm long, while white shrimp attained a larger size in the bay. Both species of Penaeus were more abundant taken in 1963 than in 1962. The abundance of shrimp in replica samples indicated poor agreement, but sizes and seasonality trends indicated fair agreement. Commercial shrimp landings in 1963 exceeded 1962 landings in all months but January and February.