Open AccessBrightness Discrimination Ability in the West Indian Manatee (Trichechus Manatus)
Author(s) -
Ulrike Griebel,
Axel Schmid
Publication year - 1997
Publication title -
journal of experimental biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.367
H-Index - 185
eISSN - 1477-9145
pISSN - 0022-0949
DOI - 10.1242/jeb.200.11.1587
Subject(s) - manatee , brightness , geography , biology , fishery , physics , optics
Two manatees were tested on their ability to discriminate brightness using a series of 30 shades of grey varying from white to black. The animals were trained to discriminate between different shades of grey in a twofold simultaneous-choice situation. Their ability to discern brightness differences correlates with Werber's law, and the calculated Werber fraction is 0.35.
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