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Electrical Shrimp Trawl Catch Efficiency for Penaeus duorarum and Penaeus aztecus
Author(s) -
Watson John W.
Publication year - 1976
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1976)105<135:estcef>2.0.co;2
Subject(s) - shrimp , penaeus , fishery , fishing , biology , decapoda , crustacean , environmental science
The catch efficiency q of two electric shrimp trawl systems, fishing two commercially important species of shrimp, was determined. The variables which determined the efficiency of electric shrimp trawls are identified and defined. The efficiency of the two electric shrimp trawl systems were predicted with a mathematical model. Field studies indicated that the predictive model for Penaeus duorarum and P. aztecus is accurate to within 5% of the measured catch efficiency values. The predicted average catch efficiency value for a 21‐m electric shrimp trawl was q* = 39% of the shrimp within its path as compared to q = 35% actual efficiency measured in the field. The predicted average efficiency value for a 15‐m electric shrimp trawl was q* = 54% as compared to q = 54% measured in situ.