Mesoscale dynamics and yellowfin tuna catches in the Mexican Pacific

Mesoscale dynamics and yellowfin tuna catches in the Mexican Pacific

Catch data of the yellowfin tuna (YFT) fishery were used to study the relationship between the seasonal and spatial variations of YFT with or without the presence of mesoscale structures at the entrance to the Gulf of California (19º–24º N, 104º–112º W). The YFT catches were distributed mainly over...

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Autores principales: Torres-Orozco, E, Trasviña, A, Muhlia-Melo, A, Ortega-García, S
Formato: Online
Lenguaje:eng
Publicado: Iniversidad Autónoma de Baja California 2005
Acceso en línea:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/33
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spelling oai:cienciasmarinas.com.mx:article-332019-04-05T19:51:22Z Mesoscale dynamics and yellowfin tuna catches in the Mexican Pacific Dinámica de mesoescala y capturas de atún aleta amarilla en el Pacífico mexicano Torres-Orozco, E Trasviña, A Muhlia-Melo, A Ortega-García, S yellowfin tuna Mexican Pacific mesoscale processes upwelling atún aleta amarilla Pacífico mexicano procesos de mesoescala surgencias Catch data of the yellowfin tuna (YFT) fishery were used to study the relationship between the seasonal and spatial variations of YFT with or without the presence of mesoscale structures at the entrance to the Gulf of California (19º–24º N, 104º–112º W). The YFT catches were distributed mainly over the continental shelf and around islands and seamounts. High concentration sets of YFT occurred throughout the year around the Marías islands and Cabo Corrientes, particularly in March and June. A warm (>28ºC) coastal jet with a width of 1.5 Rossby radius (~20.6 km) was observed off Cabo Corrientes during February and April, covering all the continental shelf off Cabo Corrientes. The jet moved at an average speed of 0.31 m s–1 and extended northwards to the Roca Corbetera seamount. The interaction with cooler water generated a frontal zone around which the YFT catches were concentrated. In contrast, during March the wind field was more favorable for the development of coastal upwelling off Cabo Corrientes. We observed an upwelling region with sea surface temperature of 18ºC and an offshore width of about a 3.7 Rossby radius of cold water that covered some 2600 km2. The YFT catches occurred in warmer water north of the upwelling zone. Se usaron datos de captura de la pesquería de atún aleta amarilla (AAA) para estudiar la relación entre la variación estacional y espacial del AAA con la presencia/ausencia de estructuras de mesoescala en la entrada al Golfo de California (19º–24ºN y 104º–112ºW). Las capturas de AAA están distribuidas sobre el talud continental, alrededor de islas y montes submarinos la mayor parte del año. Altas concentraciones de lances ocurren alrededor de las islas Marías y Cabo Corrientes a lo largo del año, particularmente en marzo y junio. En febrero y abril se encontró un flujo de agua caliente (>28ºC) con un ancho de 1.5 radios de Rossby (~20.6 km) que cubre toda la plataforma continental fuera de Cabo Corrientes. Su velocidad media es 0.31 m s–1 y se extiende al norte del bajo Roca Corbetera. La interacción con el agua fría genera una zona frontal alrededor de la cual se concentran las capturas de AAA. En contraste, durante marzo se observó una región de surgencia costera con temperatura superficial del mar de 18ºC, con un ancho de 3.7 radios de Rossby hacia fuera de la costa y cubriendo 2600 km2. Las capturas de AAA ocurren en agua caliente, hacia el norte de la zona de surgencia. Iniversidad Autónoma de Baja California 2005-03-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/33 10.7773/cm.v31i4.33 Ciencias Marinas; Vol. 31 No. 4 (2005); 671-683 Ciencias Marinas; Vol. 31 Núm. 4 (2005); 671-683 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/33/16
institution Ciencias Marinas
collection OJS
language eng
format Online
author Torres-Orozco, E
Trasviña, A
Muhlia-Melo, A
Ortega-García, S
spellingShingle Torres-Orozco, E
Trasviña, A
Muhlia-Melo, A
Ortega-García, S
Mesoscale dynamics and yellowfin tuna catches in the Mexican Pacific
author_facet Torres-Orozco, E
Trasviña, A
Muhlia-Melo, A
Ortega-García, S
author_sort Torres-Orozco, E
title Mesoscale dynamics and yellowfin tuna catches in the Mexican Pacific
title_short Mesoscale dynamics and yellowfin tuna catches in the Mexican Pacific
title_full Mesoscale dynamics and yellowfin tuna catches in the Mexican Pacific
title_fullStr Mesoscale dynamics and yellowfin tuna catches in the Mexican Pacific
title_full_unstemmed Mesoscale dynamics and yellowfin tuna catches in the Mexican Pacific
title_sort mesoscale dynamics and yellowfin tuna catches in the mexican pacific
description Catch data of the yellowfin tuna (YFT) fishery were used to study the relationship between the seasonal and spatial variations of YFT with or without the presence of mesoscale structures at the entrance to the Gulf of California (19º–24º N, 104º–112º W). The YFT catches were distributed mainly over the continental shelf and around islands and seamounts. High concentration sets of YFT occurred throughout the year around the Marías islands and Cabo Corrientes, particularly in March and June. A warm (>28ºC) coastal jet with a width of 1.5 Rossby radius (~20.6 km) was observed off Cabo Corrientes during February and April, covering all the continental shelf off Cabo Corrientes. The jet moved at an average speed of 0.31 m s–1 and extended northwards to the Roca Corbetera seamount. The interaction with cooler water generated a frontal zone around which the YFT catches were concentrated. In contrast, during March the wind field was more favorable for the development of coastal upwelling off Cabo Corrientes. We observed an upwelling region with sea surface temperature of 18ºC and an offshore width of about a 3.7 Rossby radius of cold water that covered some 2600 km2. The YFT catches occurred in warmer water north of the upwelling zone.
publisher Iniversidad Autónoma de Baja California
publishDate 2005
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/33
_version_ 1715723926555852800

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