Data/hora: 16/06/2024 07:06:06

Provedor de dados: | 20
País: | Belgium

Título:

Estimación de la edad, el crecimiento y la mortalidad natural de la merluza de cola (Macruronus magellanicus) en el océano Atlántico sudoccidental durante el verano de 2010

Estimate of age, growth and natural mortality of longtail hake (Macruronus magellanicus) in the Southwest Atlantic Ocean during summer 2010

Autores: | Zavatteri, A.; Abachian, V.E.; Giussi, A.R.; Di Leva, I.V.
Data: | 2014-06-12
Ano: | 2013
Palavras-chave: | Age determination; Growth; Natural mortality.
Resumo: | Estimate of age, growth and natural mortality of longtail hake (Macruronus magellanicus) in the Southwest Atlantic Ocean during summer 2010. Longtail hake (Macurornus magellanicus) total length (TL) and weight (W) growth parameters were estimated and age structure and natural instantaneous mortality coefficient (M) analyzed. Data were obtained within the framework of the Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP) “Observers on Board of Commercial Vessels” Subprogramme. The information, derived from the area comprised between 46° S-54° S, was collected during the February-April 2010 period. Sagittae otoliths reading of 5,034 individuals (2,429 males and 2,605 females) between 28-99 cm TL was performed. The maximum ages observed in males and females were 10 and 12 years, respectively. The age structure showed predominance of 4 year old individuals belonging to the 2005 cohort. Adults above 7 years were scarce. Length and weight growth parameters estimated fitting the von Bertalanffy model were L∞ = 85.98, K = 0.25, t0 = -1.20 for males and L∞ = 93.12, K = 0.21, t0 = -1.41 for females and W∞ = 1,824.66, K = 0.27, t0 = -1.16 for males and W∞ = 2,035.76, K = 0.26, t0 = -1.13 for females. Significant differences between sexes were found. Although at the same age females were larger than males, no significant differences in the length weight relation were found. M of 0.27 estimated for both sexes combined falls within the range expected for the species.
Tipo: | Journal Contribution
Idioma: | Espanhol

Identificador:

Inidep Informe Técnico, 85, p. 1-16

0327-9642

http://hdl.handle.net/1834/5504

Fonte: | http://creativecommons.org/licenses/by-nc/3.0/