Methods of photo-identification for small cetaceans
Würsig, B.; Jefferson, T.A. (1992). Methods of photo-identification for small cetaceans. Rep. Int. Whal. Commn. Spec. Issue 12: 43-51
In: Report of the International Whaling Commission. International Whaling Commission: Cambridge. ISSN 0143-8700, more
|
| Keywords |
Aquatic organisms > Marine organisms > Aquatic mammals > Marine mammals
Identification
Imagery > Photography
Methodology
Population characteristics > Population number
Cetacea [WoRMS]
Marine/Coastal |
| Authors | | Top |
- Würsig, B.
- Jefferson, T.A.
|
|
|
| Abstract |
Photo-identification of naturally marked cetaceans helps obtain information on group structure, site fidelity, movement patterns and population size. In conjunction with other studies, long-term photo-identification can also enhance descriptions of life history parameters such as age at sexual maturity, calving intervals and reproductive and total life span. Photo-identification can be carried out from shore and boats, with additional information available from airplanes for certain species. Thirty-five millimeter single lens reflex cameras with motor drive, data back and fixed or zoom lenses from 50 to about 300 mm are used most often. Film types and storage and retrieval systems vary widely with investigator preference. The technique of photo-identification is powerful and not usually disturbing to wild animals; its refinement and increasing sophistication (such as use with high-resolution video) promise to make it increasingly important in life history and social system studies of small cetaceans. |
|
