...) and that chromatically opponent processes occur between mechanisms. The spectral transmittance of the lens steeply declines between 410–380 nm, limiting the short-wavelength limb of the VS cone. As adults, Nile tilapia appear to possess the necessary retinal mechanisms for colour vision. While maximal sensitivity...

.... 11 11 1985 © 1986 by Company of Biologists 1986 locust vision optic lobe chromatic opponency Insects use a variety of different visual behaviour patterns to maintain level flight (reviewed by Wehner, 1981 ). For convenience these may be divided into two functional groups...