A mantle length structured stock assessment model for the jumbo squid, Dosidicus gigas, fishery of the Ecuadorian Pacific: a limited data approach

The jumbo squid Dosidicus gigas is a new fishery resource in Ecuador; the species is harvested from January to December every year. Biological sampling was carried out each month during March?December (2013) and January?December (2014) in different coastal zones off Ecuador, and the monthly mantle l...

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Autor Principal: Morales, Enrique
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Lenguaje:eng
Publicado: Reino Unido 2017
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Acceso en línea:http://repositorio.educacionsuperior.gob.ec/handle/28000/4673
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spelling oai:localhost:28000-46732017-10-17T15:33:44Z A mantle length structured stock assessment model for the jumbo squid, Dosidicus gigas, fishery of the Ecuadorian Pacific: a limited data approach Morales, Enrique BIOMASS FISHERY MANAGEMENT HARVEST RATE RECRUITMENT The jumbo squid Dosidicus gigas is a new fishery resource in Ecuador; the species is harvested from January to December every year. Biological sampling was carried out each month during March?December (2013) and January?December (2014) in different coastal zones off Ecuador, and the monthly mantle length (ML) composition was obtained from field data in the coastal areas. The catch-at-mantle length data were analysed based on the mantle length structured model (CAMLA). The results showed that the biomass of D. gigas in Pacific Ecuadorian waters was 641,915 t (2013) and 1,866,857 t (2014). For 2013, for squid smaller than 30?cm ML the biomass was greater than 30,000 t, while individuals between 35 and 48?cm ML had an estimated biomass varying between 35,000 and 45,000 t. During 2014, the biomass estimated for squid smaller than 30?cm ML was low (40,000 t or less); however, squid between 38 and 48?cm ML showed a change in biomass compared with the previous fishing season, varying from 100,000 to 190,000 t. The harvested rate-at-mantle length for squid larger than 35?cm ML was higher than for individuals between 12 and 30?cm ML. The CAMLA model was found to be appropriate for modelling catch-at-mantle length of jumbo squid in Ecuadorian waters, and the model can be used to obtain harvest management quantities, as well as quantitative outputs useful for Ecuadorian stakeholders. 2017-10-17T15:33:35Z 2017-10-17T15:33:35Z 2017 article Morales, Enrique. & Pachecho, Jos?. (2017). A mantle length structured stock assessment model for the jumbo squid, Dosidicus gigas, fishery of the Ecuadorian Pacific: a limited data approach. Marine Biology Research. Reino Unido. pp. 417-428 http://repositorio.educacionsuperior.gob.ec/handle/28000/4673 eng DOI;10.1080/17451000.2016.1272696 closedAccess http://creativecommons.org/licenses/by-nc-sa/3.0/ec/ pp. 417-428 Reino Unido
institution SENESCYT
collection Repositorio SENESCYT
biblioteca Biblioteca Senescyt
language eng
format Artículos
topic BIOMASS
FISHERY MANAGEMENT
HARVEST RATE
RECRUITMENT
spellingShingle BIOMASS
FISHERY MANAGEMENT
HARVEST RATE
RECRUITMENT
Morales, Enrique
A mantle length structured stock assessment model for the jumbo squid, Dosidicus gigas, fishery of the Ecuadorian Pacific: a limited data approach
description The jumbo squid Dosidicus gigas is a new fishery resource in Ecuador; the species is harvested from January to December every year. Biological sampling was carried out each month during March?December (2013) and January?December (2014) in different coastal zones off Ecuador, and the monthly mantle length (ML) composition was obtained from field data in the coastal areas. The catch-at-mantle length data were analysed based on the mantle length structured model (CAMLA). The results showed that the biomass of D. gigas in Pacific Ecuadorian waters was 641,915 t (2013) and 1,866,857 t (2014). For 2013, for squid smaller than 30?cm ML the biomass was greater than 30,000 t, while individuals between 35 and 48?cm ML had an estimated biomass varying between 35,000 and 45,000 t. During 2014, the biomass estimated for squid smaller than 30?cm ML was low (40,000 t or less); however, squid between 38 and 48?cm ML showed a change in biomass compared with the previous fishing season, varying from 100,000 to 190,000 t. The harvested rate-at-mantle length for squid larger than 35?cm ML was higher than for individuals between 12 and 30?cm ML. The CAMLA model was found to be appropriate for modelling catch-at-mantle length of jumbo squid in Ecuadorian waters, and the model can be used to obtain harvest management quantities, as well as quantitative outputs useful for Ecuadorian stakeholders.
author Morales, Enrique
author_facet Morales, Enrique
author_sort Morales, Enrique
title A mantle length structured stock assessment model for the jumbo squid, Dosidicus gigas, fishery of the Ecuadorian Pacific: a limited data approach
title_short A mantle length structured stock assessment model for the jumbo squid, Dosidicus gigas, fishery of the Ecuadorian Pacific: a limited data approach
title_full A mantle length structured stock assessment model for the jumbo squid, Dosidicus gigas, fishery of the Ecuadorian Pacific: a limited data approach
title_fullStr A mantle length structured stock assessment model for the jumbo squid, Dosidicus gigas, fishery of the Ecuadorian Pacific: a limited data approach
title_full_unstemmed A mantle length structured stock assessment model for the jumbo squid, Dosidicus gigas, fishery of the Ecuadorian Pacific: a limited data approach
title_sort mantle length structured stock assessment model for the jumbo squid, dosidicus gigas, fishery of the ecuadorian pacific: a limited data approach
publisher Reino Unido
publishDate 2017
url http://repositorio.educacionsuperior.gob.ec/handle/28000/4673
_version_ 1634995272736047104
score 11,871979