Using laser photogrammetry to measure long-finned pilot whales (Globicephala melas)

Autor: Joanna B. Wong, Marie Auger-Méthé
Rok vydání: 2018
Předmět:
Zdroj: Proceedings of the Nova Scotian Institute of Science (NSIS). 49:269
ISSN: 2292-7743
DOI: 10.15273/pnsis.v49i2.8164
Popis: Knowledge of animal morphometry is important to understanding their ecology. By attaching two parallel lasers to a camera, known as laser photogrammetry (LP), a scale is projected onto photographed animals, allowing measurement of their body. Our primary aims were to test LP precision, and to estimate body length from dorsal-fin dimensions of Globicephala melas. Secondary aims involved demonstrating applications of LP, such as sex and leader determination. Using photographs taken over two-months, we measured dorsal base lengths (DBL) of 194 individuals individually-identified with natural markings. Results indicated 33 individuals were photographed in multiple encounters and eight matched previously-sexed whales. A mean difference of
Databáze: OpenAIRE