Measuring the range to animals at sea from boats using photographic and video images

Journal of Applied Ecology

Volumn 38, Issue 4, 2001, Pages 879-887

  Gordon, Jonathan ^a,b  

^a UNIVERSITY OF OXFORD   (United Kingdom)

^b UNIVERSITY OF ST ANDREWS   (United Kingdom)

Author keywords

Cetacean; Line transect; Mitigation; Photogrammetry; Range finding

Indexed keywords

MEASUREMENT METHOD; PHOTOGRAPHY; SHIPBORNE MEASUREMENT; SURVEYING; VIDEOGRAPHY;

ANIMALIA; CETACEA;

EID: 0034864846     PISSN: 00218901     EISSN: None     Source Type: Journal    
DOI: 10.1046/j.1365-2664.2001.00615.x     Document Type: Article

References (13)

1. Mark-recapture models for line transect surveys
2. A new technique to measure spatial relationships within groups of free-ranging cetaceans
3. A simple photographic technique for measuring the length of whales from boats at sea
4. A range finder for pelagic bird censusing
5. Surfacing rates of minke whales in Norwegian waters
6. Calibration of cetacean data from multidisciplinary surveys around South Georgia using a second independent observation platform
7. Calculating sighting distance from angular readings during shipboard, aerial, and shore-based marine mammal surveys
8. Estimates of bias and variability in visual distance measurements made by observers during shipboard surveys of northeastern Atlantic minke whales
9. Surfacing rates and surfacing patterns of minke whales (Balaenoptera acutorostrata) off central California, and the probability of a whale surfacing within visual range
10. The use of scale binoculars for distance estimation and a time lapse camera for angle estimation during the 1983/84 IDCR minke whale assessment cruise