franja-sup-Home franja-sup-UV

EspañolEnglish

Volume 41 - Number 2 - 2006
Artículo


Estimation of the natural mortality rate of Farfantepenaeus californiensis (Holmes, 1900) and Litopenaeus vannamei (Boone, 1931), in the coastal zone of the Gulf of Tehuantepec, Mexico

Sebastián Ramos-Cruz1, Blanca Sánchez-Meraz2, Fleury Carrasco-Ayuso2 y Pedro Cervantes-Hernández2

 

1 Programa Camarón del Instituto Nacional de la Pesca, Centro Regional de Investigación Pesquera-Salina Cruz, C. P. 70680, Salina Cruz, Oaxaca, México
2 Universidad del Mar, Puerto Ángel, Distrito de San Pedro Pochutla, A. P. 47., C. P. 70902, Puerto Ángel, Oaxaca, México

 

E-mail:  cripsc@prodigy.net.mx


We estimated the monthly natural mortality rate (M) in the marine phase of Litopenaeus vannamei (Boone, 1931) and Farfantepenaeus californiensis (Holmes, 1900) in the Gulf of Tehuantepec, Mexico. The analyzed data were the commercial capture, the capture for unit effort (CPUE) and the fishing effort in trips for the brown shrimp (December 1989 to December 1998), and the white shrimp (October 1992 to December 1998). The models based on growth parameters were the most trustworthy for estimating the natural mortality rate (M). The results were: M= 0.20 monthly for the white shrimp and M= 0.22 monthly for the brown shrimp. The fishing mortality (F) increased from the 4 to the 16 months of age (F4= 0.02 F16= 0.79 monthly in white shrimp) and (F4= 0.18 F16= 1.61 monthly in brown shrimp). These results suggest a minor exploitation of the recruitment and greater on the reproducers groups of both species. In the fishing season 95/96, a decrease and an increase was observed in the captures of white shrimp and brown shrimp, respectively. This apparent tendency still stands according to that reported by El Instituto Nacional de la Pesca (INP) for the fishing season 03/04.

 

Key words: Natural mortality, exploitation rate, brown shrimp, white shrimp, Gulf of Tehuantepec, Mexico

 

pdficon-rbmoDownload

 

1Laboratorio de Zooplancton, Instituto de Ciencias del Mar y Limnología,Universidad Nacional Autónoma de México. A. P. 70-305, 04510 México, D. F. México
 
atasehir evden eve nakliyat avcilar evden eve nakliyat umraniye evden eve nakliyat beylikduzu evden eve nakliyat sisli evden eve nakliyat bahcelievler evden eve nakliyat