Development of Airborne Remote Sensing Methods for Surveys of Pacific Walrus (Paperback) (ISBN-13: 9781514725153)

In April 2003, we conducted an operational test of an airborne multispectral scanner (AMS) over pack ice in the Bering Sea to evaluate the potential of this system as a survey tool for Pacific walruses. We scanned a total of 28,875 km2 of sea ice habitat at a spatial resolution of 4 m and collected high resolution photographs from a subset of the thermally detected walrus groups. We found a significant positive relationship between walrus group size and the amount of heat measured by the AMS and used this relationship to estimate total walrus numbers in the survey area. The number of walruses hauled out onto sea ice in our study area was estimated at 4,785 animals with a 95% confidence interval of 2,499-7,111.

Author: U. S. Department of the Interior
ISBN-10: 1514725150
ISBN-13: 9781514725153
Publisher: Createspace Independent Publishing Platform
Language: English
Published: 06/26/2015
Pages: 32
Format: Paperback
Weight: 0.22lbs
Size: 11.02h x 8.50w x 0.07d