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Evaluation of the fishery of the brown shrimp Penaeus aztecus of the mexican littoral of the northwest Gulf of Mexico
Author(s) -
Rubén Castro,
Francisco Arreguı́n-Sánchez
Publication year - 1991
Publication title -
ciencias marinas
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.215
H-Index - 29
eISSN - 2395-9053
pISSN - 0185-3880
DOI - 10.7773/cm.v17i4.840
Subject(s) - fishing , fishery , shrimp , stock assessment , penaeus , maximum sustainable yield , littoral zone , geography , fisheries management , biology , ecology
Stock assessment of the brown shrimp (Penaeus azteca) from the northwest Gulf of Mexico is developed using monthly data from commercial catches from 1974 to 1982. Growth parameters from the von Bertalanffy equation were as follows: Kmin = 0.142 m–1 to Kmax = 0.1812 m–1; L∞min = 214 mm to L∞max = 236 mm. Mortality rates were obtained directly from the identified cohorts through the catch curve and the weighted average of the amount of fishing applied on each cohort; results were as follows: total mortality, Zmin(1981) = 0.8494 to Zmax(1974) = 1.240; fishing mortality, Fmin( 1981) = 0.3786 to Fmax(1974) = 0.646; and natural mortality, Mmin(1978) = 0.415 to Mmax(1974) = 0.594. Catchability estimations mere: qmin(1975) = 0.0012 to qmax(1978) = 0.0021. Exploitation rate indicates a reduction of 30% of the fishing intensity, for the last two years, compared with the previous ones. From these years (1981 and 1982), fishery was acting under the maximum sustainable yield level.

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