TITLE:
Management for the White Shrimp (Litopenaeus vannamei) from the Southeastern Gulf of California through Biomass Models Analysis
AUTHORS:
Juan Madrid-Vera, Darío Chávez Herrera, Juan Melchor Aragón, Ricardo Meraz-Sánchez, José Alberto Rodríguez-Preciado
KEYWORDS:
Litopenaeus vannamei; Biomass; Gulf of California
JOURNAL NAME:
Open Journal of Marine Science,
Vol.2 No.1,
January
17,
2012
ABSTRACT: Samples taken during the closed fishing seasons from 1992 to 2010 were analyzed at sea. These data along with the landing records for the fishing periods from 1992-1993 to 2009-2010 were used to allow the situation of Litopenaeus van-namei from the coasts of Sinaloa and Nayarit to be analyzed by means of stochastic models and by a graphic approach for the surplus biomass. Using the catch from 1993-1994 as a reference point and comparing this to the 2008-2009 catch revealed a stock decrease of about 65%. By taking into account the percentage contribution to total shrimp land-ings, these changes showed a decrease from 76% to 12%. There were changes between 2000 and 2001 when the fleet grew by 50%. Considering a 3600 t maximum sustained yield (MSY) in the series 1992-2010, 50% of the reports are lower. It is necessary to recover the stock.