An Application of Close Range Photogrammetry In Dolphin Studies
Article
Article Title | An Application of Close Range Photogrammetry In Dolphin Studies |
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ERA Journal ID | 4654 |
Article Category | Article |
Authors | Bräger, S. and Chong, A. K. |
Journal Title | The Photogrammetric Record |
Journal Citation | 16 (93), pp. 503-517 |
Number of Pages | 15 |
Year | Apr 1999 |
Place of Publication | United Kingdom |
ISSN | 0031-868X |
1477-9730 | |
Digital Object Identifier (DOI) | https://doi.org/10.1111/0031-868X.00139 |
Web Address (URL) | https://onlinelibrary.wiley.com/doi/abs/10.1111/0031-868X.00139 |
Abstract | Dolphins are agile animals and are very difficult to measure at sea. However, for the conservation of threatened or endangered species, measurement may be vital because it allows a demographic analysis of the population. Hector's dolphin (Cephalorhynchus hectori) is a rare species living only in coastal waters around New Zealand where it is studied from small boats. This paper describes a stereophotogrammetric technique developed to measure body length accurately at sea without having to capture the individual. Constant calibration with the use of a control frame allowed accurate body length measurements of dolphins to be made with this low cost system, with a measurement error of 4 per cent to 6 per cent of actual length. |
Keywords | Hector's dolphin; body length measurement; close range photogrammetry |
Public Notes | There are no files associated with this item. |
Byline Affiliations | University of Otago, New Zealand |
https://research.usq.edu.au/item/w27w4/an-application-of-close-range-photogrammetry-in-dolphin-studies
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