Age, growth and mortality in Buccinanops globulosus (Gastropoda: Nassariidae) from Golfo Nuevo (Argentina)

Authors
Avaca, Maria Soledad; Narvarte, Maite Andrea; Martín, Pablo Rafael
Publication Year
2013
Language
Spanish
Format
article
Status
Published version
Description
Buccinanops globulosus is a commercially exploited gastropod common on coastal waters of the Southwestern Atlantic Ocean. We determined the age and estimated growth and mortality rates of B.globulosus in a population from Golfo Nuevo (Patagonia, Argentina). Age was determined by counting opercular rings and growth was described by the von Ber length-at-age. Mortality rate (Z) was estimated by the linearized catch curve method. The maximum age was determined at eight years. Growth parameters estimated for the whole population were TSL∞ = 37.87 mm, k = 0.33 y -1 and t0 = - 0.65 y. Likelihood ratio tests indicated significant differences in asymptotic length and fitted growth models between sexes. Annual mortality rate (the first reported for the species) was estimated to be 0.64 y -1 (0.52 ? 0.76). Information on growth parameters of B. globulosus showed that TSL∞ and the index of overall growth performance (ɸ) of the population here studied were intermediate as compared to those previously studied populations, thus indicating sitespecific growth differences. Taking into account that the most common management strategy in gastropod fisheries is the use of a minimum size limit (MSL), we suggest that fisheries measures such as MSL for this species should be established only for small geographical scales.
Fil: Avaca, Maria Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Comahue. Instituto de Biologia Marina y Pesquera Almirante Storni; Argentina
Fil: Narvarte, Maite Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Comahue. Instituto de Biologia Marina y Pesquera Almirante Storni; Argentina
Fil: Martín, Pablo Rafael. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina
Subject
Age
Growth
Mortality
Gastropod
Fishery management
Biología Marina, Limnología
Ciencias Biológicas
CIENCIAS NATURALES Y EXACTAS
Access level
Restricted access
License
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repository
CONICET Digital (CONICET)
Institution
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identifier
oai:ri.conicet.gov.ar:11336/11091