Temperature and Activities of a White Shark, Carcharodon carcharias

Carey, Francis G.; Kanwisher, John; Brazier, Oliver; Gabrielson, Geir; Casey, John; Whitney, Nicholas M.

doi:10.2307/1444603

Cited by 151 publications

(109 citation statements)

References 15 publications

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“…around islands have been studied in the blue shark, Prionace glauca (Sciarrotta and Nelson, 1977;Tricas, 1979 (Carey et al, 1982), the Atlantic salmon, Salmo salar (Westerberg, 1982a), the sockeye salmon, Oncorhynchus nerka (Quinn et al, 1989), the blue shark, Aionace glauca …”

Section: Horizontal Movementsmentioning

confidence: 99%

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Horizontal and vertical movements of the scalloped hammerhead shark, Sphyrna lewini, in the southern Gulf Of California, Mexico

Klimley¹,

Geniz²,

Mancilla³

1993

Cienc. Mar.

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Recibido en enero de 1992; aceptado en julio de 1992 RESUMENSe proporciona una descripción de los movimientos horizontales y verticales de cuatro tiburones martillo (Sphyma lewini) marcados con transmisores ultrasónicos.El estudio se llevó a cabo en aguas pelágicas que rodean el Bajo Espíritu Santo y la Isla Las Animas, ubicados en el sur del Golfo de California, durante los meses de agosto de 1986, agosto de 1988 y julio y agosto de 1989. Se observó que los tiburones se mantuvieron generalmente sobre el bajo durante el día. Se realizaron quince seguimientos telemétricos de los movimientos de salida y regreso (homing) al bajo. De estos rastreos, trece se llevaron a cabo hacia la región pelágica durante la noche y dos de día. El intervalo de distancia máxima alcanzada fue de 4 a 20 km. Algunos movimientos de salida y regreso fueron próximos y paralelos uno del otro, lo que sugiere que estos tiburones tienen rutas designadas para visitar sus sitios preferencialesde alimento. Los tiburones presentaron movimientos verticales, ascendentes y descendentes (similares a la trayectoria de un yoyo). El intervalo de profundidad de las inmersiones observadas fue de 50 a 450 m. Los movimientos verticales se llevaron a cabo generalmente por debajo de la capa mixta superficial y por encima del fondo marino. Las diferencias de las temperaturas del agua (20 a 6oC) en que se desplazaron los tiburones durante sus excursiones verticales fueron pequeñas en relación con las observadas en otras especiesde peces, lo que sugiere que para el tiburón martillo la función de dichas excursiones no es de termorregulación. August 1986, 1988-1989, and July 1989 in the pelagic environment surrounding Espíritu Santo Seamount and Las Animas Island in the southem Gulf of California. 'I'he hammerheads generally remained above the seamount and near the island during the day. Fífteen sharks were tracked during homing movements away from and back to the seamount. Of the excursions, 13 were made into the pelagic region during the night and two during the day. The maximum distance moved away from the seamount ranged from 4 to 20 km. Departure and retum movements were at times close to and parallel to each other, suggesting that the sharks followed particular routes to preferred feeding sites. The sharks made vertical excursions, ascending and descending in the water column (in yo-yo form). The diving oscillations occurred behveen SO to 4.50 m. These vertical movements were usually below the surface mixed layer and well away from the bottom. The range in water temperatures (2o-6oC) encountered during these vertical excursions was small in relation to that reoorted for other species of fishes, suggesting that for this species the function of the excursions may not be thermoregulation.

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Section: Horizontal Movementsmentioning

confidence: 99%

“…Vertical movements of shark C, superposed on the distribution of temperature from a bathythermograph recording taken in August close to EBES ( Fig. 89, VIII ;Robinson, 1973 (Carey et al, 1982), el salmón del Atlántico,…”

Section: ; Galván-magaña Et Al 1989) the Sharks Follow The Sammentioning

confidence: 99%

Horizontal and vertical movements of the scalloped hammerhead shark, Sphyrna lewini, in the southern Gulf Of California, Mexico

Klimley¹,

Geniz²,

Mancilla³

1993

Cienc. Mar.

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“…Indeed, much of what is known of this species in the North Atlantic comes from the analysis of distribution records (Templeman 1963, rare behavioral observations (Carey et al 1982, and the opportunistic examination of dead specimens (Pratt 1996).…”

Section: Introductionmentioning

confidence: 99%

“…The only horizontal and vertical movement observations of white sharks in the North Atlantic come from a single acoustic tracking study conducted by Carey et al (1982). These researchers acoustically tagged a 4.6 m total length (TL) white shark that was scavenging a fin whale Balaenoptera physalus carcass 39 km southwest of Montauk Point, New York, and tracked the shark for 83 h as it moved 190 km southwest along the 25 fathom (46 m) bathymetric curve.…”

Section: Introductionmentioning

confidence: 99%

“…The shark remained largely associated with the thermocline at approximately 10 to 20 m, but made periodic excursions to the bottom. At the time, Carey et al (1982) noted that 'the seals, sea lions, and elephant seals, which are common items in the diet of white sharks in other regions, are not available' in the WNA. Hence, they concluded that the observed diving behavior may be associated with searching for dead whales, which were considered an important food resource for large white sharks (> 3 m TL) on the continental shelf.…”

Section: Introductionmentioning

confidence: 99%

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