Underwater Mirror Exposure to Free-Ranging Naïve Atlantic Spotted Dolphins (Stenella frontalis) in ...

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" Underwater Mirror Exposure to Free-Ranging Naïve Atlantic Spotted Dolphins (Stenella frontalis) in the Bahamas "
Delfour, Fabienne; Herzing, Denise

Document Type	:	AL
Record Number	:	936204
Doc. No	:	LA06c1802x
Language of Document	:	English
Main Entry	:	Delfour, Fabienne; Herzing, Denise
Title & Author	:	Underwater Mirror Exposure to Free-Ranging Naïve Atlantic Spotted Dolphins (Stenella frontalis) in the Bahamas [Article]\ Delfour, Fabienne; Herzing, Denise
Title of Periodical	:	International Journal of Comparative Psychology
Volume/ Issue Number	:	26/2
Date	:	2013
Abstract	:	The “mirror state,” described for human self-recognition, has been found in captive or human-raised species. In marine mammals, bottlenose dolphins and killer whales have shown evidence of body examination, self-directed and contingency checking behaviors whereas false killer whales appeared ambiguous and California sea lions did not recognize themselves in a mirror. Self-recognition processes in wild cetaceans remain unknown. Since 1985, a resident community of Atlantic spotted dolphin (Stenella frontalis) has been studied underwater in the Bahamas. We describe the reaction of free-ranging dolphins during 14 exposures to the presence of a mirror from 1994/1995 and 2004/2005. Responses to the mirror were mixed. Initial reactions of mother/calf groups were to swim around mirror and stay in close physical proximity. Others ignored the mirror entirely, or swam around or underneath. A single male became stationary and postured in an aggressive stance in front of the mirror. The wild spotted dolphins showed a significant preference to exposing and/or orienting their right side to the mirror versustheir left side. We suggest that the animals assign different meanings to a mirror in the wild versus the same object in captivity.