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Horizontal and vertical movements of the common dolphinfish (Coryphaena hippurus) in La Paz Bay, Mexico

dc.creatorCRISTINA HERNANDEZ TLAPALE
dc.creatorJAMES THOMAS KETCHUM MEJIA
dc.creatorEMIGDIO MARIN ENRIQUEZ
dc.creatorARTURO FABIAN EDUARDO MUHLIA MELO
dc.date2015
dc.identifierhttp://cibnor.repositorioinstitucional.mx/jspui/handle/1001/653
dc.identifier.urihttp://dspace.cibnor.mx:8080/handle/123456789/692
dc.description"The common dolphinfish (Coryphaena hippurus) is an important resource for the sport-fishing industry in Mexico. It is captured incidentally by the eastern Pacific purse-seine tuna fishery and in coastal areas by artisanal fisheries. Although it is considered a highly migratory species, only few studies of its movements are available. In this study, the behavior of the common dolphinfish was analyzed by means of acoustic telemetry at three locations within La Paz Bay (southern Gulf of California) from summer to autumn 2013. Acoustic transmitters were attached to six individuals and they were tracked for periods of up to 48 h. Every hour, vertical profiles of temperature and bathymetry were made. To determine the effect of biotic (sex) and abiotic (water temperature and depth, thermocline depth, hour, and bathymetry) variables on the horizontal and vertical movements of tagged organisms, generalized additive mixed models were applied. The results showed a tendency of horizontal movements to the southwestern zone of the bay; two individuals crossed from the eastern to the western side. The average speed was 0.51 m s–1. The vertical movements showed that the individuals spent 80% of the time above 34 m depth, of which around 45% was spent in the upper 10 m of the water column. During daylight hours they swam in shallow waters (upper 10 m) and at night they performed deeper dives (73 m maximum depth). Biotic and abiotic variables influenced both types of movements; however, bathymetry nd temperature largely explained fish movements."
dc.description"El dorado (Coryphaena hippurus) es un recurso importante para la pesca deportiva en México. Es capturado incidentalmente por la flota atunera de cerco en el Pacífico oriental y en áreas costeras por la pesca artesanal. Aunque es considerada una especie altamente migratoria, existen pocos estudios sobre sus movimientos. En este estudio se analizaron los movimientos del dorado por medio de telemetría acústica en tres localidades dentro de la bahía de La Paz, parte sur del golfo de California, entre verano y otoño de 2013. Se adhirieron transmisores acústicos a seis individuos y se siguieron durante periodos de hasta 48 h. Cada hora, se hicieron perfiles verticales de temperatura y batimetría. Para determinar el efecto de variables bióticas (sexo) y abióticas (temperatura y profundidad del agua, profundidad de la termoclina, hora y batimetría) sobre los movimientos horizontales y verticales de los organismos marcados, se aplicaron modelos aditivos generalizados mixtos. Los resultados mostraron una tendencia a movimientos horizontales a la zona suroeste de bahía de La Paz; dos movimientos atravesaron la bahía de sureste a suroeste. La velocidad promedio fue de 0.51 m s–1. Los movimientos verticales indicaron que los individuos estuvieron por encima de los 34 m de profundidad el 80% del tiempo, del cual aproximadamente 45% estuvieron en los 10 m superiores. En horas de luz los peces nadaron por arriba de los 10 m de profundidad y en la noche realizaron inmersiones de hasta 73 m. Las variables bióticas y abióticas influyeron ambos tipos de movimientos; sin embargo, la batimetría y temperatura explicaron en gran parte los movimientos de los peces."
dc.formatapplication/pdf
dc.languageeng
dc.publisherUNIVERSIDAD AUTONOMA DE BAJA CALIFORNIA
dc.relationinfo:eu-repo/semantics/reference/DOI/DOI: 10.7773/cm.v41i4.2560
dc.relationinfo:eu-repo/semantics/reference/ISSN/ISSN: 2395-9053
dc.relationinfo:eu-repo/semantics/reference/URL/URL: http://www.cienciasmarinas.com.mx/index.php/cmarinas/issue/archive
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/4.0
dc.sourceCiencias Marinas
dc.subjectinfo:eu-repo/classification/AUTOR/horizontal and vertical movements, Coryphaena hippurus, La Paz Bay, acoustic transmitters
dc.subjectinfo:eu-repo/classification/AUTOR/movimientos horizontales y verticales, bahía de La Paz, transmisores acústicos
dc.subjectinfo:eu-repo/classification/cti/2
dc.subjectinfo:eu-repo/classification/cti/24
dc.subjectinfo:eu-repo/classification/cti/2401
dc.subjectinfo:eu-repo/classification/cti/240102
dc.titleHorizontal and vertical movements of the common dolphinfish (Coryphaena hippurus) in La Paz Bay, Mexico
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion


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