06 November 2015

New dorsal fin marking

A fresh new notch has appeared on the dorsal fin of this striped dolphin.

Matching thousands of dorsal fin photos belonging to hundreds of different animals would be hard enough, but it becomes even harder when one is required to consider dorsal fin changes that may have occurred over time. Failure to track evolution of fin markings will result in wrong additions of new individuals in the catalogue, and therefore biased estimates of abundance. One must be very careful.

(Photo by S. Bonizzoni, Gulf of Corinth, Greece)

No comments: