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Fisheries Review,
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Thomson Gale on
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From the author: Twenty-nine verified records of white sharks, Carcharodon carcharias, from British Columbia and Alaska waters (1961-2004) are presented. Record locations ranged from lat. 48[degrees]48'N to lat. 60[degrees]17'N, including the northernmost occurrence of a white shark and the first report of this species from the central Bering Sea. White sharks recorded from the study area were generally large, with 95% falling between 3.8 and 5.4 m in length. Mature white sharks of both sexes occur in British Columbia and Alaska waters, although they do not necessarily reproduce there. White sharks actively feed in the study area; their diet is similar to that reported for this species from Washington and northern California waters. Sea surface temperature (SST) concurrent with white shark records from the study area ranged from 16[degrees]C to between 6.4[degrees]C and 5.0[degrees]C, extending the lower extreme of the range of SST from which this species has been previously reported. White shark strandings are rarely reported, yet 16 (55%) of the records hi this study are of beached animals; strandings generally occurred later in the year and at lower latitudes than non-strandings. No significant correlation was found between white shark records in the study area and El Nino events and no records occurred during La Nina events. The dam presented here indicate that white sharks are more abundant hi the cold waters of British Columbia and Alaska than previous records suggest.
Citation DetailsTitle: Northerly distribution of white sharks, Carcharodon carcharias, in the eastern Pacific and relation to ENSO events.
Author: R. Aidan Martin
Publication:Marine Fisheries Review (Magazine/Journal)
Date: January 1, 2004
Publisher: Thomson Gale
Volume: 66
Issue: 1
Page: 16(11)
Distributed by Thomson Gale.
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