Estimating the number of walruses in Svalbard from aerial surveys and behavioural data from Satellite Telemetry.(Technical report)

Arctic | June 1, 2008| | Copyright

ABSTRACT. All known terrestrial haul-out sites for walruses in Svalbard (n = 79) were surveyed during the period 1-3 August 2006, and sites that were in use (n = 17) were documented using digital photography. A total of 657 walruses were counted on land in the resultant images. An extensive behavioural data set from walruses equipped with satellite relay data loggers, covering August 2002 to August 2005, was used to account for walruses that were in the water. The proportion of walruses at sea during the survey was calculated to be 0.750 on the basis of 28 thirty-day periods ...

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