Demographical analysis of the pink ling Genypterus blacodes (Schneider 1801) in the austral demersal fishery: A matrix approach evaluating harvest and non-harvest states

Gonzalez-Olivares, E; Aranguiz-Acuna, A; Ramos-Jiliberto, R; Rojas-Palma, A

Abstract

In this work we model the population dynamics of Genypterus blacodes of the demersal fishery on Chilean southern-austral region, using stage structured matrices, from a 17-year time-series of annual age-specific female abundances. For the parameterized matrices obtained, we calculated population growth rates with confidence intervals, net reproductive rate, reproductive value, stable stage structure, and we performed a sensitivity analysis. We also generated and analyzed an analogous stage structured matrix model for the same population assuming no harvesting. The main results are (1) a negative growth rate for the observed population data; (2) a positive growth rate for the population without the capture effect which is significantly different from the growth rate of the harvested population; (3) the sensitivity analysis revealed that ? is more sensitive to variations in adult survival in the age class 7-10 years; (4) the observed population exhibits a stable stage structure. © 2008 Elsevier B.V. All rights reserved.

Más información

Título según WOS: Demographical analysis of the pink ling Genypterus blacodes (Schneider 1801) in the austral demersal fishery: A matrix approach evaluating harvest and non-harvest states
Título según SCOPUS: Demographical analysis of the pink ling Genypterus blacodes (Schneider 1801) in the austral demersal fishery: A matrix approach evaluating harvest and non-harvest states
Título de la Revista: FISHERIES RESEARCH
Volumen: 96
Número: 02-mar
Editorial: ELSEVIER SCIENCE BV
Fecha de publicación: 2009
Página de inicio: 216
Página final: 222
Idioma: English
URL: http://linkinghub.elsevier.com/retrieve/pii/S0165783608003792
DOI:

10.1016/j.fishres.2008.11.006

Notas: ISI, SCOPUS