Modeling and analysis of the recruitment of Peruvian anchovy (Engraulis ringens) between 1961 and 2009
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Redalyc · Ciencias Marinas
The principal objective of this work is to present a new model for the assessment of recruitment of the northern-central stock of Peruvian anchovy (Engraulis ringens), and use it to estimate monthly time series of recruits and pre-recruits between 1961 and 2009. The model is length-based and has mon...
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| Pubblicato in: | Ciencias Marinas |
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| Natura: | Artículo científico |
| Lingua: | en |
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Universidad Autónoma de Baja California
2011
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| _version_ | 1878325299876200448 |
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| author | R Oliveros-Ramos |
| author_facet | R Oliveros-Ramos |
| collection | Ciencias Marinas |
| container_title | Ciencias Marinas |
| contents | Modeling and analysis of the recruitment of Peruvian anchovy (Engraulis ringens) between 1961 and 2009 R Oliveros-Ramos C Peña Ciencias de la Tierra Peruvian anchovy recruitment time series evolutionary algorithms The principal objective of this work is to present a new model for the assessment of recruitment of the northern-central stock of Peruvian anchovy (Engraulis ringens), and use it to estimate monthly time series of recruits and pre-recruits between 1961 and 2009. The model is length-based and has monthly temporal resolution, allowing the variability in abundance and seasonality of recruitment to be modeled based on fishery and scientific survey information. The anchovy population is modeled with two recruitments per year, parameterizing recruitment using abundance, mean length, and dispersion of the mean length at recruitment. This way of modeling recruitment enables a better representation of the temporal continuity of the recruitment process in comparison to an approach that only considers the abundance of recruits. The monthly time series of pre-recruits (4.0-7.5 cm) and recruits (8.0-11.5 cm) obtained were analyzed, and two regime shifts in recruitment dynamics (1971 and 1991) were identified. Seasonal patterns given by the model are consistent with those obtained by independent direct studies. We discuss the advantages and limitations of this approach within the framework of the study of the recruitment process and the integration of reproductive data in stock assessment models. 2011 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48021256010 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.4B Vol.37 |
| ctrlnum | oai:cienciasmarinas.com.mx:article/1873 10.7773/cm.v37i4B.1873 |
| description | The principal objective of this work is to present a new model for the assessment of recruitment of the northern-central stock of Peruvian anchovy (Engraulis ringens), and use it to estimate monthly time series of recruits and pre-recruits between 1961 and 2009. The model is length-based and has monthly temporal resolution, allowing the variability in abundance and seasonality of recruitment to be modeled based on fishery and scientific survey information. The anchovy population is modeled with two recruitments per year, parameterizing recruitment using abundance, mean length, and dispersion of the mean length at recruitment. This way of modeling recruitment enables a better representation of the temporal continuity of the recruitment process in comparison to an approach that only considers the abundance of recruits. The monthly time series of pre-recruits (4.0–7.5 cm) and recruits (8.0–11.5 cm) obtained were analyzed, and two regime shifts in recruitment dynamics (1971 and 1991) were identified. Seasonal patterns given by the model are consistent with those obtained by independent direct studies. We discuss the advantages and limitations of this approach within the framework of the study of the recruitment process and the integration of reproductive data in stock assessment models.
El objetivo principal de este trabajo es presentar un nuevo modelo para estimar el reclutamiento del stock norte-centro de la anchoveta peruana (Engraulis ringens) y usarlo para estimar series mensuales de reclutas y prereclutas entre 1961 y 2009. El modelo está basado en longitudes y tiene una resolución mensual, permitiendo modelar la variabilidad en la abundancia y la estacionalidad del reclutamiento a partir de información disponible de la pesquería y cruceros de evaluación científica. La población de anchoveta se modela con dos reclutamientos por año, parametrizando el reclutamiento por su abundancia en número, longitud media y dispersión de la longitud media al reclutamiento. Esta forma de modelar el reclutamiento permite representar mejor la continuidad temporal del proceso de reclutamiento que un enfoque basado sólo en el número de individuos reclutados. Al analizar las series mensuales de prereclutas (4.0–7.5 cm) y reclutas (8.0–11.5 cm) obtenidas se identificaron dos cambios de fase en la dinámica del reclutamiento (1971 y 1991), hallándose además que los patrones estacionales del reclutamiento obtenidos por el modelo son coherentes con los patrones descritos por otros estudios biológicos. Se discuten las ventajas y limitaciones del enfoque utilizado en el marco del estudio del proceso de reclutamiento de la anchoveta peruana y la integración de información reproductiva en los modelos de evaluación de stocks. |
| format | Artículo científico |
| id | redalyc_48021256010 |
| institution | Redalyc Ciencias Marinas |
| language | en |
| publishDate | 2011 |
| publisher | Universidad Autónoma de Baja California |
| spelling | Modeling and analysis of the recruitment of Peruvian anchovy (Engraulis ringens) between 1961 and 2009 Modelado y análisis del reclutamiento de la anchoveta peruana (Engraulis ringens) entre 1961 y 2009 Oliveros-Ramos, R Peña, C The principal objective of this work is to present a new model for the assessment of recruitment of the northern-central stock of Peruvian anchovy (Engraulis ringens), and use it to estimate monthly time series of recruits and pre-recruits between 1961 and 2009. The model is length-based and has monthly temporal resolution, allowing the variability in abundance and seasonality of recruitment to be modeled based on fishery and scientific survey information. The anchovy population is modeled with two recruitments per year, parameterizing recruitment using abundance, mean length, and dispersion of the mean length at recruitment. This way of modeling recruitment enables a better representation of the temporal continuity of the recruitment process in comparison to an approach that only considers the abundance of recruits. The monthly time series of pre-recruits (4.0–7.5 cm) and recruits (8.0–11.5 cm) obtained were analyzed, and two regime shifts in recruitment dynamics (1971 and 1991) were identified. Seasonal patterns given by the model are consistent with those obtained by independent direct studies. We discuss the advantages and limitations of this approach within the framework of the study of the recruitment process and the integration of reproductive data in stock assessment models. El objetivo principal de este trabajo es presentar un nuevo modelo para estimar el reclutamiento del stock norte-centro de la anchoveta peruana (Engraulis ringens) y usarlo para estimar series mensuales de reclutas y prereclutas entre 1961 y 2009. El modelo está basado en longitudes y tiene una resolución mensual, permitiendo modelar la variabilidad en la abundancia y la estacionalidad del reclutamiento a partir de información disponible de la pesquería y cruceros de evaluación científica. La población de anchoveta se modela con dos reclutamientos por año, parametrizando el reclutamiento por su abundancia en número, longitud media y dispersión de la longitud media al reclutamiento. Esta forma de modelar el reclutamiento permite representar mejor la continuidad temporal del proceso de reclutamiento que un enfoque basado sólo en el número de individuos reclutados. Al analizar las series mensuales de prereclutas (4.0–7.5 cm) y reclutas (8.0–11.5 cm) obtenidas se identificaron dos cambios de fase en la dinámica del reclutamiento (1971 y 1991), hallándose además que los patrones estacionales del reclutamiento obtenidos por el modelo son coherentes con los patrones descritos por otros estudios biológicos. Se discuten las ventajas y limitaciones del enfoque utilizado en el marco del estudio del proceso de reclutamiento de la anchoveta peruana y la integración de información reproductiva en los modelos de evaluación de stocks. Universidad Autónoma de Baja California, Instituto de Investigaciones Oceanológicas 2011-06-28 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf https://cienciasmarinas.com.mx/index.php/cmarinas/article/view/1873 10.7773/cm.v37i4B.1873 Ciencias Marinas; Vol. 37 No. 4B (2011); 659-674 Ciencias Marinas; Vol. 37 Núm. 4B (2011); 659-674 2395-9053 0185-3880 eng https://cienciasmarinas.com.mx/index.php/cmarinas/article/view/1873/1697 ['Redalyc'] redalyc_48021256010 Modeling and analysis of the recruitment of Peruvian anchovy (Engraulis ringens) between 1961 and 2009 ['Modeling and analysis of the recruitment of Peruvian anchovy (Engraulis ringens) between 1961 and 2009', 'R Oliveros-Ramos', 'Ciencias de la Tierra', 'Peruvian anchovy', 'recruitment time series', 'evolutionary algorithms', 'Modeling and analysis of the recruitment of Peruvian anchovy (Engraulis ringens) between 1961 and 2009 R Oliveros-Ramos C Peña Ciencias de la Tierra Peruvian anchovy recruitment time series evolutionary algorithms The principal objective of this work is to present a new model for the assessment of recruitment of the northern-central stock of Peruvian anchovy (Engraulis ringens), and use it to estimate monthly time series of recruits and pre-recruits between 1961 and 2009. The model is length-based and has monthly temporal resolution, allowing the variability in abundance and seasonality of recruitment to be modeled based on fishery and scientific survey information. The anchovy population is modeled with two recruitments per year, parameterizing recruitment using abundance, mean length, and dispersion of the mean length at recruitment. This way of modeling recruitment enables a better representation of the temporal continuity of the recruitment process in comparison to an approach that only considers the abundance of recruits. The monthly time series of pre-recruits (4.0-7.5 cm) and recruits (8.0-11.5 cm) obtained were analyzed, and two regime shifts in recruitment dynamics (1971 and 1991) were identified. Seasonal patterns given by the model are consistent with those obtained by independent direct studies. We discuss the advantages and limitations of this approach within the framework of the study of the recruitment process and the integration of reproductive data in stock assessment models. 2011 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48021256010 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.4B Vol.37'] ['R Oliveros-Ramos'] ['R Oliveros-Ramos'] ['Artículo científico'] ['2011'] ['Universidad Autónoma de Baja California'] ['en'] ['Ciencias de la Tierra', 'Peruvian anchovy', 'recruitment time series', 'evolutionary algorithms'] ['https://www.redalyc.org/articulo.oa?id=48021256010'] ['Modeling and analysis of the recruitment of Peruvian anchovy (Engraulis ringens) between 1961 and 2009 R Oliveros-Ramos C Peña Ciencias de la Tierra Peruvian anchovy recruitment time series evolutionary algorithms The principal objective of this work is to present a new model for the assessment of recruitment of the northern-central stock of Peruvian anchovy (Engraulis ringens), and use it to estimate monthly time series of recruits and pre-recruits between 1961 and 2009. The model is length-based and has monthly temporal resolution, allowing the variability in abundance and seasonality of recruitment to be modeled based on fishery and scientific survey information. The anchovy population is modeled with two recruitments per year, parameterizing recruitment using abundance, mean length, and dispersion of the mean length at recruitment. This way of modeling recruitment enables a better representation of the temporal continuity of the recruitment process in comparison to an approach that only considers the abundance of recruits. The monthly time series of pre-recruits (4.0-7.5 cm) and recruits (8.0-11.5 cm) obtained were analyzed, and two regime shifts in recruitment dynamics (1971 and 1991) were identified. Seasonal patterns given by the model are consistent with those obtained by independent direct studies. We discuss the advantages and limitations of this approach within the framework of the study of the recruitment process and the integration of reproductive data in stock assessment models. 2011 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48021256010 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.4B Vol.37'] |
| spellingShingle | Modeling and analysis of the recruitment of Peruvian anchovy (Engraulis ringens) between 1961 and 2009 R Oliveros-Ramos Ciencias de la Tierra Peruvian anchovy recruitment time series evolutionary algorithms Modeling and analysis of the recruitment of Peruvian anchovy (Engraulis ringens) between 1961 and 2009 R Oliveros-Ramos C Peña Ciencias de la Tierra Peruvian anchovy recruitment time series evolutionary algorithms The principal objective of this work is to present a new model for the assessment of recruitment of the northern-central stock of Peruvian anchovy (Engraulis ringens), and use it to estimate monthly time series of recruits and pre-recruits between 1961 and 2009. The model is length-based and has monthly temporal resolution, allowing the variability in abundance and seasonality of recruitment to be modeled based on fishery and scientific survey information. The anchovy population is modeled with two recruitments per year, parameterizing recruitment using abundance, mean length, and dispersion of the mean length at recruitment. This way of modeling recruitment enables a better representation of the temporal continuity of the recruitment process in comparison to an approach that only considers the abundance of recruits. The monthly time series of pre-recruits (4.0-7.5 cm) and recruits (8.0-11.5 cm) obtained were analyzed, and two regime shifts in recruitment dynamics (1971 and 1991) were identified. Seasonal patterns given by the model are consistent with those obtained by independent direct studies. We discuss the advantages and limitations of this approach within the framework of the study of the recruitment process and the integration of reproductive data in stock assessment models. 2011 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48021256010 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.4B Vol.37 |
| title | Modeling and analysis of the recruitment of Peruvian anchovy (Engraulis ringens) between 1961 and 2009 |
| title_alt | Modelado y análisis del reclutamiento de la anchoveta peruana (Engraulis ringens) entre 1961 y 2009 |
| topic | Ciencias de la Tierra Peruvian anchovy recruitment time series evolutionary algorithms |
| url | https://www.redalyc.org/articulo.oa?id=48021256010 https://cienciasmarinas.com.mx/index.php/cmarinas/article/view/1873 |