The Relationship of Size Class Distribution to Migratory Behavior in Brown Shrimp (Penaeus aztecus) in Pamlico Sound, North Carolina

Date of Award

Summer 1983

Document Type


Degree Name

Master of Science (MS)


Ocean & Earth Sciences



Committee Director

Phillip R. Mundy

Committee Member

Chester E. Grosch

Committee Member

Michael J. Doviak

Call Number for Print

Special Collections LD4331.O35P31


The potential of migratory timing information for dynamic yield estimation in the North Carolina brown shrimp fishery has been shown. The present research investigates the influence of size class distribution on the quantitative characterization of migratory timing in the brown shrimp. Catch and nominal effort data were stratified into count size ranges and the time density model of Mundy (1979) was specified for each stratum. The recruitment patterns of the shrimp into the fishery was also investigated.

The stratification of time densities by size class has shown a definite pattern in the migratory behavior of the brown shrimp. It appears that recruitment by size class to the fishery is discrete. Total yield estimates generated from the size class stratification were frequently better than the yield estimates of Babcock (1982) and Matylewich (1982). Inferences can be made about the adaptive responses of brown shrimp to different environmental regimes by looking at the time density distributions.


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