1. Aho, A.C., Donner, K., Hyden, C. et al. (1988) Low retinal noise in animals with low body temperature allows high visual sensitivity. Nature, London ,334, 348–50.
2. Allen, D.M. and McFarland, W.N. (1973) The effect of temperature on rhodopsinporphyropsin ratios in a fish. Vision Research ,13, 1303–9.
3. Archer, S.N. (1988) A microspectrophotometric study of visual pigment polymorphism in the guppy, Poecilia reticulata. PhD Thesis, University of Bristol, Bristol, U.K.
4. Archer, S.N. and Lythgoe, J.N. (1990) The visual pigment basis for cone polymorphism in the guppy, Poecilia reticulata. Vision Research ,30, 225–33.
5. Archer, S.N., Endler, J.A., Lythgoe, J.N. and Partridge, J.C. (1987) Visual pigment polymorphism in the guppy, Poecilia reticulata. Vision Research, 27,1243–52.