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Photo-grammetric measurements of swimming speed and body length of basking sharks observed around the Hebrides, Scotland

Research output: Contribution to journalArticle

Abstract

Photo-grammetric techniques developed for measuring body length and small scale movement patterns of cetaceans were applied to surface swimming basking sharks off the west coast of Scotland. These methods removed the need for close approaches, reducing the likelihood of disturbing the focal animal. Average swimming speed was calculated from the total path length between shark locations measured at approximately one minute intervals. These average speeds varied from 0.49 to 0.73 ms−1 for tracks of between 30 and 170 minutes' duration. Body length measurements ranged between 2.35 and 6.43 m. For ten sharks where body length and swimming speed were measured there was a significant correlation between body length (L) and swimming speed (V) expressed as V = 0.36L033.
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Original languageEnglish
Pages (from-to)361-366
Number of pages6
JournalJournal of the Marine Biological Association of the United Kingdom
Volume90
Issue number2
Early online date10 Aug 2009
DOIs
StatePublished - Mar 2010

    Research areas

  • Basking shark, Photo-gammetric techniques, Size estimation

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