1. Ali, M.A. (1959) The ocular structure, retinomotor and photobeha-vioural responses of the juvenile Pacific salmon. Can. J. Zool. 37: 965–996.
2. Ali, M.A. (1964) Retinomotor responses in the enucleated eyes of the brown bullhead Ictalurus nebulosus and the goldfish Caras-sius auratus. Revue Can. Biol. 23: 55–66.
3. Blaxter, J.H.S. (1970) 2.Light.2.3Animals.2.32.Fishes. In Marine Ecology Vol. Pt. 1 pp. 213–320, edited by O. Kinne, Wiley Interscience, London.
4. Blaxter, J.H.S. (1975) The role of light in the vertical migration of fish — a review. Symp. Br. Ecol. Soc. (in press).
5. Blaxter, J.H.S. and Parrish, B.B. (1965) The importance of light in shoaling, avoidance of nets and vertical migration by herring. J. Cons. Perm. Int. Explor. Mer. 30: 40–57.