1. Grantham, G.J. (1977) Southern Ocean Fisheries Survey Progr. GLO/SO/77/2, FAO, Rome.
2. Shibata, N. (1983) Bull. Jap. Soc. Sci. Fish. 49, 259–264.
3. Clarke, A. (1980) J. Exp. Mar. Biol. Ecol. 43, 221–236.
4. Rzavskaja, F.M., Sakaeva, E.A., and Dubrovskaja, T.A. (1979) Rybnoe chozjajstvo 1979 (10), 53–54.
5. Bottino, N.R. (1973) Fed. Proc. Fed. Am. Soc. Exper. Biol. 32, 562.