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Randomized Sample Surveys to Estimate Annual Blue Crab Harvests by a Multi‐gear Fishery in the Maryland Waters of Chesapeake Bay
Author(s) -
Summers J. K.,
Hoffman H. W.,
Richkus W. A.
Publication year - 1983
Publication title -
north american journal of fisheries management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.587
H-Index - 72
eISSN - 1548-8675
pISSN - 0275-5947
DOI - 10.1577/1548-8659(1983)3<9:rsstea>2.0.co;2
Subject(s) - callinectes , chesapeake bay , fishery , sampling (signal processing) , stratified sampling , environmental science , bay , simple random sample , residence , geography , statistics , mathematics , biology , engineering , estuary , population , crustacean , archaeology , telecommunications , demography , sociology , detector
Pilot surveys of commercial trotliners, sport trotliners, and collapsible‐trap crabbers were conducted to provide information on which to base a comprehensive 1981 catch survey. A 1979 census of commercial crab potters also was used for this purpose. Several random sampling techniques were designed to estimate the harvest of blue crabs (Callinectes sapidus) by different gear types in the Maryland portion of the Chesapeake Bay. The most efficient, comprehensive sampling design included simple random sampling of 323 sport trotline crabbers and 148 crabbers using collapsible traps; random sampling, stratified by month, of a total of 1,148 commercial trotline crabbers; and random sampling stratified by month and county of residence of 5,379 commercial crab potters.