Two-Medium Photogrammetry for Bottlenose Dolphin Studies
Article
Article Title | Two-Medium Photogrammetry for Bottlenose Dolphin Studies |
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ERA Journal ID | 4653 |
Article Category | Article |
Authors | Chong, A. K. and Schneider, K. |
Journal Title | Photogrammetric Engineering and Remote Sensing |
Journal Citation | 67 (5), pp. 621-628 |
Number of Pages | 8 |
Year | May 2001 |
Place of Publication | United States |
ISSN | 0099-1112 |
2374-8079 | |
Abstract | In this research we determined the significance of the external physiology between a unique pod of bottlenose dolphins in Doubtful Sound, Fiordland, New Zealand and their cousins elsewhere. To do this, we introduced an in situ digital stereophotogrammetric technique to measure these cetaceans' body dimensions accurately at sea without having to capture the individuals. The technique involved the use of a wooden model to determine the size of measurement error of a prototype stereocamera system for measuring objects under the surface of seawater. A linear regression model was used to correct for the measurement error. The model utilized the stereophotogrammetric depth measurement of an object under the water surface. Body dimensions of stranded dolphins from the Texas coast were used to estimate growth parameters of Doubtful Sound dolphins. These growth parameters were used to estimate the age of the stereoscopically measured Doubtful Sound dolphins. We found that the Doubtful Sound bottlenose dolphins are larger and longer than their Texas cousins by 28 percent and their flippers and the flukes are longer by 22 percent and 17 percent, respectively. |
Keywords | Digital signal processing; Estimation; Marine biology; Physiology |
Public Notes | There are no files associated with this item. |
Byline Affiliations | University of Otago, New Zealand |
https://research.usq.edu.au/item/w27z8/two-medium-photogrammetry-for-bottlenose-dolphin-studies
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