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Optimum Size of Sampling Unit for Estimating the Density of Marine Populations
Michael Pennington and Jon H. Volstad
Vol. 47, No. 2 (Jun., 1991), pp. 717-723
Published by: International Biometric Society
Stable URL: http://www.jstor.org/stable/2532157
Page Count: 7
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Data from several trawling experiments and from some scallop dredge surveys indicate that, within limits, a smaller sampling unit can be more efficient than a larger unit for marine abundance surveys. Taking into account survey costs and sampling variability, the unit size is found that produces the most precise density estimate given a fixed amount of survey resources or, if a certain level of precision is required, the size of sampling unit that minimizes the total cost of the survey. As an illustration, the optimum sampling unit sizes are derived for surveys of some fish populations and for a scallop stock on Georges Bank.
Biometrics © 1991 International Biometric Society