Volume 45
Age and Growth Estimation for the White Shrimp Penaeus setiferus from the Offshore Fishery of the Northwestern Gulf of México
Authors
Arreguín-Sánchez, F. Download PDF Open PDF in BrowserOther Information
Date: 1999
Pages: 146-159
Event: Proceedings of the Forty-Fifth Annual Gulf and Caribbean Fisheries Institute
City: Charleston, South Carolina
Country: USA
Abstract
Age and growth of the white shrimp, Penaeus setiferus, from the Northwestern Gulf of Mexico was estimated through the application of tbe ELEFAN program developed as part of the LFDA software. Data consisted of monthly series of catch per unit of effort (CPUE)-at-length composition for 1975. It was assumed growth follows the von Bertalanffy curve, and a nonparametric estimate of standard deviation for the growth rate (K) and the asymptotic length (L ) was also obtained following the Jackknife technique and analyzed by using the phi-prime index of growth performance. Results indicate a mean value for K = 1.1156 year-1 and its standard deviation, sd, = 0.0497; and L = 191.35 mm (total length) and its standard deviation, sd, = 4.34. The range of variation of the ESP/ASP ratio was 0.55 to 0.66. The phi-prime index gives a mean value of ø = 4.61, and its standard deviation was, sd, = 0.011. P. setiferus is a relatively slow growing shrimp compared with other species in tbe Gulf of Mexico, with a well defined growth pattern.