Underwater and aerial visual acuity in the Asian "clawless" otter (Amblonyx cineria cineria).

摘要: Gentry and Peterson1 have compared data obtained from a sea otter (Enhydra lutris) on an underwater size discrimination task with by Schusterman et al.2 using two lions (Zalophus californianus). Although Peterson did not test the otter's vision in air, they concluded that its performance was inferior to of lion because “pinniped eye” is emmetropic adaptations for aerial “otter (Lutra) air vision3. Such interpretation difference between otters emphasizes different dioptric mechanisms ignores neural structure organization at retinal level, as well level cortical projection areas.