Stock assessment of jumbo squid Dosidicus gigas in northwest Mexico
ABSTRACT The population dynamics of jumbo squid Dosidicus gigas from northwest Mexico was evaluated for the period 1974-2012 using Schaefer's model, where model parameters were estimated with the catch maximum sustainable yield method (Catch-MSY) using two prior intrinsic population increase ra...
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| Lenguaje: | English |
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Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
2018
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oai:scielo:S0718-560X20180002003302018-06-13Stock assessment of jumbo squid Dosidicus gigas in northwest MexicoUrías-Sotomayor,RicardoRivera-Parra,Gabriel IvánMartínez-Cordero,Francisco JavierCastañeda-Lomas,NicolásPérez-González,RaúlRodríguez-Domínguez,Guillermo Dosidicus gigas jumbo squid stock assessment Catch-MSY Schaefer's Model Gulf of California ABSTRACT The population dynamics of jumbo squid Dosidicus gigas from northwest Mexico was evaluated for the period 1974-2012 using Schaefer's model, where model parameters were estimated with the catch maximum sustainable yield method (Catch-MSY) using two prior intrinsic population increase rate (r) range values (1.0 to 2.0 and 1.5 to 2.0). Estimated parameters with both prior r ranges were 1.23 and 1.68 yr−1 for r and 243,836 and 190,468 ton for carrying capacity (k), respectively. Corresponding management quantities were 75,147 and 80,098 ton for the maximum sustainable yield (MSY) and 121,918 and 95,234 ton for the biomass at MSY (BMSY). Estimated jumbo squid biomass dropped below the BMSY after 2003, and near to 0.2 k in 2012. The Schaefer's model showed that declines in estimated biomass were preceded by catches that exceeded the MSY. Strong El Niño-Southern Oscillation events can change the availability of jumbo squid in northwest Mexico through migratory processes and phenotype changes in maturation size, but stock biomass variability is most likely to be caused by fishing.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.46 n.2 20182018-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2018000200330en10.3856/vol46-issue2-fulltext-8 |
| institution |
Scielo Chile |
| collection |
Scielo Chile |
| language |
English |
| topic |
Dosidicus gigas jumbo squid stock assessment Catch-MSY Schaefer's Model Gulf of California |
| spellingShingle |
Dosidicus gigas jumbo squid stock assessment Catch-MSY Schaefer's Model Gulf of California Urías-Sotomayor,Ricardo Rivera-Parra,Gabriel Iván Martínez-Cordero,Francisco Javier Castañeda-Lomas,Nicolás Pérez-González,Raúl Rodríguez-Domínguez,Guillermo Stock assessment of jumbo squid Dosidicus gigas in northwest Mexico |
| description |
ABSTRACT The population dynamics of jumbo squid Dosidicus gigas from northwest Mexico was evaluated for the period 1974-2012 using Schaefer's model, where model parameters were estimated with the catch maximum sustainable yield method (Catch-MSY) using two prior intrinsic population increase rate (r) range values (1.0 to 2.0 and 1.5 to 2.0). Estimated parameters with both prior r ranges were 1.23 and 1.68 yr−1 for r and 243,836 and 190,468 ton for carrying capacity (k), respectively. Corresponding management quantities were 75,147 and 80,098 ton for the maximum sustainable yield (MSY) and 121,918 and 95,234 ton for the biomass at MSY (BMSY). Estimated jumbo squid biomass dropped below the BMSY after 2003, and near to 0.2 k in 2012. The Schaefer's model showed that declines in estimated biomass were preceded by catches that exceeded the MSY. Strong El Niño-Southern Oscillation events can change the availability of jumbo squid in northwest Mexico through migratory processes and phenotype changes in maturation size, but stock biomass variability is most likely to be caused by fishing. |
| author |
Urías-Sotomayor,Ricardo Rivera-Parra,Gabriel Iván Martínez-Cordero,Francisco Javier Castañeda-Lomas,Nicolás Pérez-González,Raúl Rodríguez-Domínguez,Guillermo |
| author_facet |
Urías-Sotomayor,Ricardo Rivera-Parra,Gabriel Iván Martínez-Cordero,Francisco Javier Castañeda-Lomas,Nicolás Pérez-González,Raúl Rodríguez-Domínguez,Guillermo |
| author_sort |
Urías-Sotomayor,Ricardo |
| title |
Stock assessment of jumbo squid Dosidicus gigas in northwest Mexico |
| title_short |
Stock assessment of jumbo squid Dosidicus gigas in northwest Mexico |
| title_full |
Stock assessment of jumbo squid Dosidicus gigas in northwest Mexico |
| title_fullStr |
Stock assessment of jumbo squid Dosidicus gigas in northwest Mexico |
| title_full_unstemmed |
Stock assessment of jumbo squid Dosidicus gigas in northwest Mexico |
| title_sort |
stock assessment of jumbo squid dosidicus gigas in northwest mexico |
| publisher |
Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar |
| publishDate |
2018 |
| url |
http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2018000200330 |
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| _version_ |
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