Evidence of overfishing of geoduck clam Panopea globosa from a length-based stock assessment approach
Stock assessment of the geoduck clam Panopea globosa in Mexico has been based on data-poor without consideration of the biological traits of the species, promoting a passive management strategy without biological reference points for its harvest and conservation, which results in limited advice rega...
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doaj-5cf332b2f833489da5a0863d68ecf42f2020-11-25T03:08:24ZengPeerJ Inc.PeerJ2167-83592020-06-018e906910.7717/peerj.9069Evidence of overfishing of geoduck clam Panopea globosa from a length-based stock assessment approachMarlene A. Luquin-Covarrubias0Enrique Morales-Bojórquez1Juan A. García-Borbón2Sergio Amezcua-Castro3Sergio A. Pérez-Valencia4Estefani Larios-Castro5Centro de Investigaciones Biológicas del Noroeste, La Paz, B.C.S., MéxicoCentro de Investigaciones Biológicas del Noroeste, La Paz, B.C.S., MéxicoInstituto Nacional de Pesca y Acuacultura (INAPESCA), CRIAP, La Paz, B.C.S., MexicoCentro Interdisciplinario de Ciencias Marinas, La Paz, B.C.S., MéxicoCentro Intercultural de Estudios de Desiertos y Océanos A.C., Puerto Peñasco, Sonora, MéxicoCentro de Investigaciones Biológicas del Noroeste, La Paz, B.C.S., MéxicoStock assessment of the geoduck clam Panopea globosa in Mexico has been based on data-poor without consideration of the biological traits of the species, promoting a passive management strategy without biological reference points for its harvest and conservation, which results in limited advice regarding the sustainability of the fishery. The stock assessment was supported on an integrated catch-at-size assessment model. The model described the population changes, including recruitment, selectivity, fishing mortality, individual growth patterns and survival over time, providing management quantities for the geoduck clam fishery, such as biomass-at-length (total and vulnerable) and harvest rate-at-length. The results indicated overfishing of the geoduck clam population; the harvest rate exceeded the management tactics established for this fishery, even the individuals smaller than the minimum legal size (130 mm) were harvested. Thus, declines in the total biomass (from 3,262 to 1,130 t) and recruitment (representing an 86% decrease) were observed from 2010 to 2012. Although the results showed a recovery trend in recruitment and total biomass from 2014 to 2016, this trend may have been due to the spatial relocation of fishing mortality.https://peerj.com/articles/9069.pdfPopulation dynamicsLength structureManagement strategyBiomassOverfishing |
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DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Marlene A. Luquin-Covarrubias Enrique Morales-Bojórquez Juan A. García-Borbón Sergio Amezcua-Castro Sergio A. Pérez-Valencia Estefani Larios-Castro |
spellingShingle |
Marlene A. Luquin-Covarrubias Enrique Morales-Bojórquez Juan A. García-Borbón Sergio Amezcua-Castro Sergio A. Pérez-Valencia Estefani Larios-Castro Evidence of overfishing of geoduck clam Panopea globosa from a length-based stock assessment approach PeerJ Population dynamics Length structure Management strategy Biomass Overfishing |
author_facet |
Marlene A. Luquin-Covarrubias Enrique Morales-Bojórquez Juan A. García-Borbón Sergio Amezcua-Castro Sergio A. Pérez-Valencia Estefani Larios-Castro |
author_sort |
Marlene A. Luquin-Covarrubias |
title |
Evidence of overfishing of geoduck clam Panopea globosa from a length-based stock assessment approach |
title_short |
Evidence of overfishing of geoduck clam Panopea globosa from a length-based stock assessment approach |
title_full |
Evidence of overfishing of geoduck clam Panopea globosa from a length-based stock assessment approach |
title_fullStr |
Evidence of overfishing of geoduck clam Panopea globosa from a length-based stock assessment approach |
title_full_unstemmed |
Evidence of overfishing of geoduck clam Panopea globosa from a length-based stock assessment approach |
title_sort |
evidence of overfishing of geoduck clam panopea globosa from a length-based stock assessment approach |
publisher |
PeerJ Inc. |
series |
PeerJ |
issn |
2167-8359 |
publishDate |
2020-06-01 |
description |
Stock assessment of the geoduck clam Panopea globosa in Mexico has been based on data-poor without consideration of the biological traits of the species, promoting a passive management strategy without biological reference points for its harvest and conservation, which results in limited advice regarding the sustainability of the fishery. The stock assessment was supported on an integrated catch-at-size assessment model. The model described the population changes, including recruitment, selectivity, fishing mortality, individual growth patterns and survival over time, providing management quantities for the geoduck clam fishery, such as biomass-at-length (total and vulnerable) and harvest rate-at-length. The results indicated overfishing of the geoduck clam population; the harvest rate exceeded the management tactics established for this fishery, even the individuals smaller than the minimum legal size (130 mm) were harvested. Thus, declines in the total biomass (from 3,262 to 1,130 t) and recruitment (representing an 86% decrease) were observed from 2010 to 2012. Although the results showed a recovery trend in recruitment and total biomass from 2014 to 2016, this trend may have been due to the spatial relocation of fishing mortality. |
topic |
Population dynamics Length structure Management strategy Biomass Overfishing |
url |
https://peerj.com/articles/9069.pdf |
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