S. R. Marwitz

Sample Size Requirements for Detecting Length Differences of White Shrimp

Subsampling to obtain length measurements is often necessary when large numbers of organisms are captured with bag seines in a resource monitoring program. Catches of white shrimp were used to examine the representativeness of the subsamples and to construct sample size selection curves for determining the number of length measurements required to detect a given percentage difference between samples. A wide size range of white shrimp (Penaeus setiferus) is often captured in the same sample. Subsampling to measure 19 white shrimp from Texas Parks and Wildlife Department (TPWD) bag seine...