El Niño Southern Oscillation and spatial-temporal variability of the nominal performances of swordfish (Xiphias gladius) in the southeastern Pacific

Swordfish (Xiphias gladius) is a highly migratory pelagic species, found in tropical, subtropical and temperate regions. In the Pacific Ocean, several studies have linked their wide latitudinal distribution (50ºN-50ºS) to environmental variables, since food is abundant along the frontal zones where...

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Autores principales:	Espíndola,Fernando, Yáñez,Eleuterio, Barbieri,María Ángela
Lenguaje:	English
Publicado:	Universidad de Valparaíso. Facultad de Ciencias del Mar 2011
Materias:	CPUE isotherm El Niño 12 index remote sensing
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572011000200012
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spelling	oai:scielo:S0718-195720110002000122011-11-07El Niño Southern Oscillation and spatial-temporal variability of the nominal performances of swordfish (Xiphias gladius) in the southeastern PacificEspíndola,FernandoYáñez,EleuterioBarbieri,María Ángela CPUE isotherm El Niño 12 index remote sensing Swordfish (Xiphias gladius) is a highly migratory pelagic species, found in tropical, subtropical and temperate regions. In the Pacific Ocean, several studies have linked their wide latitudinal distribution (50ºN-50ºS) to environmental variables, since food is abundant along the frontal zones where currents or water bodies converge. In the southeastern Pacific, the subtropical anticyclone positively forces ocean temperatures along the west coast of South America, decreasing pole ward from the subtropical latitudes due to the El Niño Southern Oscillation. Environmental data from remote sensing enabled us to study changes in the spatial position of the 18ºC isotherm in relation to spatial-temporal changes in swordfish nominal fishing yields (CPUE) of industrial longline fleet in the coast of Chile. Correlations were obtained between the latitudinal gravity center (LGC) of CPUE and the latitudinal position of the 18ºC isotherm, between the latitudinal position of the 18ºC isotherm and the area bounded by the 17ºC isotherm, as well as between El Niño 12 index and the latitudinal position of the 18ºC isotherm. At a seasonal level, the 18ºC isotherm moves south of 37ºS at the beginning of the year, reaching 25ºS in August. This pattern occurs in a similar way to the area bounded by the 17º and 18ºC isotherm. Two phases were observed in the swordfish CPUE, with 0.65 ± 0.06 kg per hook since mid-April to early June, and 0.37 ± 0.05 kg per hook from early September until late November.info:eu-repo/semantics/openAccessUniversidad de Valparaíso. Facultad de Ciencias del MarRevista de biología marina y oceanografía v.46 n.2 20112011-08-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572011000200012en10.4067/S0718-19572011000200012
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	CPUE isotherm El Niño 12 index remote sensing
spellingShingle	CPUE isotherm El Niño 12 index remote sensing Espíndola,Fernando Yáñez,Eleuterio Barbieri,María Ángela El Niño Southern Oscillation and spatial-temporal variability of the nominal performances of swordfish (Xiphias gladius) in the southeastern Pacific
description	Swordfish (Xiphias gladius) is a highly migratory pelagic species, found in tropical, subtropical and temperate regions. In the Pacific Ocean, several studies have linked their wide latitudinal distribution (50ºN-50ºS) to environmental variables, since food is abundant along the frontal zones where currents or water bodies converge. In the southeastern Pacific, the subtropical anticyclone positively forces ocean temperatures along the west coast of South America, decreasing pole ward from the subtropical latitudes due to the El Niño Southern Oscillation. Environmental data from remote sensing enabled us to study changes in the spatial position of the 18ºC isotherm in relation to spatial-temporal changes in swordfish nominal fishing yields (CPUE) of industrial longline fleet in the coast of Chile. Correlations were obtained between the latitudinal gravity center (LGC) of CPUE and the latitudinal position of the 18ºC isotherm, between the latitudinal position of the 18ºC isotherm and the area bounded by the 17ºC isotherm, as well as between El Niño 12 index and the latitudinal position of the 18ºC isotherm. At a seasonal level, the 18ºC isotherm moves south of 37ºS at the beginning of the year, reaching 25ºS in August. This pattern occurs in a similar way to the area bounded by the 17º and 18ºC isotherm. Two phases were observed in the swordfish CPUE, with 0.65 ± 0.06 kg per hook since mid-April to early June, and 0.37 ± 0.05 kg per hook from early September until late November.
author	Espíndola,Fernando Yáñez,Eleuterio Barbieri,María Ángela
author_facet	Espíndola,Fernando Yáñez,Eleuterio Barbieri,María Ángela
author_sort	Espíndola,Fernando
title	El Niño Southern Oscillation and spatial-temporal variability of the nominal performances of swordfish (Xiphias gladius) in the southeastern Pacific
title_short	El Niño Southern Oscillation and spatial-temporal variability of the nominal performances of swordfish (Xiphias gladius) in the southeastern Pacific
title_full	El Niño Southern Oscillation and spatial-temporal variability of the nominal performances of swordfish (Xiphias gladius) in the southeastern Pacific
title_fullStr	El Niño Southern Oscillation and spatial-temporal variability of the nominal performances of swordfish (Xiphias gladius) in the southeastern Pacific
title_full_unstemmed	El Niño Southern Oscillation and spatial-temporal variability of the nominal performances of swordfish (Xiphias gladius) in the southeastern Pacific
title_sort	el niño southern oscillation and spatial-temporal variability of the nominal performances of swordfish (xiphias gladius) in the southeastern pacific
publisher	Universidad de Valparaíso. Facultad de Ciencias del Mar
publishDate	2011
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572011000200012
work_keys_str_mv	AT espindolafernando elninosouthernoscillationandspatialtemporalvariabilityofthenominalperformancesofswordfishxiphiasgladiusinthesoutheasternpacific AT yanezeleuterio elninosouthernoscillationandspatialtemporalvariabilityofthenominalperformancesofswordfishxiphiasgladiusinthesoutheasternpacific AT barbierimariaangela elninosouthernoscillationandspatialtemporalvariabilityofthenominalperformancesofswordfishxiphiasgladiusinthesoutheasternpacific
_version_	1714202309344362496

El Niño Southern Oscillation and spatial-temporal variability of the nominal performances of swordfish (Xiphias gladius) in the southeastern Pacific

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