TY - JOUR
T1 - Effects of Serial Depletion on the Fishery Management of Geoduck Panopea globosa
AU - Amezcua-Castro, Sergio
AU - Morales-Bojórquez, Enrique
AU - Arreguín-Sánchez, Francisco
AU - Luquin-Covarrubias, Marlene Anaid
AU - García-Borbón, Juan Antonio
AU - Cisneros-Montemayor, Andrés Miguel
N1 - Publisher Copyright:
© 2019 E-flow BioOne. All rights reserved.
PY - 2019/12/26
Y1 - 2019/12/26
N2 - In this study, a length-structured population model was implemented to describe changes in the abundance of Panopea globosa over time, given parameters for growth and natural mortality rate. The following modules described population dynamics: stochastic individual model growth, survival, selectivity, recruitment, and estimates of initial numbers. In addition, the harvest rate, total biomass, and vulnerable biomass (VB) were calculated to advise management quantities. Spatial serial depletion patterns were detected for P. globosa and evident from the expansion of the fishing grounds over time. These patterns of geographic expansion are common in developing fisheries and are a problem for stock assessment. The densest patches available are usually harvested or even depleted, with fishers switching to new beds and potentially rotating back over time. If the changes in the harvestable area are ignored, the increases in VB and recruitment may mask the population dynamics of several beds, including those that are depleted and have low yield.
AB - In this study, a length-structured population model was implemented to describe changes in the abundance of Panopea globosa over time, given parameters for growth and natural mortality rate. The following modules described population dynamics: stochastic individual model growth, survival, selectivity, recruitment, and estimates of initial numbers. In addition, the harvest rate, total biomass, and vulnerable biomass (VB) were calculated to advise management quantities. Spatial serial depletion patterns were detected for P. globosa and evident from the expansion of the fishing grounds over time. These patterns of geographic expansion are common in developing fisheries and are a problem for stock assessment. The densest patches available are usually harvested or even depleted, with fishers switching to new beds and potentially rotating back over time. If the changes in the harvestable area are ignored, the increases in VB and recruitment may mask the population dynamics of several beds, including those that are depleted and have low yield.
KW - Panopea globosa
KW - fleet dynamics
KW - geoduck
KW - harvest rate
KW - recruitment
KW - spatial serial depletion
UR - http://www.scopus.com/inward/record.url?scp=85077399403&partnerID=8YFLogxK
U2 - 10.2983/035.038.0305
DO - 10.2983/035.038.0305
M3 - Artículo
SN - 0730-8000
VL - 38
SP - 543
EP - 556
JO - Journal of Shellfish Research
JF - Journal of Shellfish Research
IS - 3
ER -