G3 POPULATION IN THE CATCHMENT AREA, 1977 Population Population density [km-2] Major cities (population) Total 382,900 51.1 Zomba (20,000) Source: Agnew, S. (1979) Fishing and fish trading; socio-economic studies. "Lake Chilwa" (ed. Kalk, M., McLachlan, A. J. & Howard-Williams, C.), pp. 345-368. Source: Kalk, M. (1979) Focus on social problems. "Lake Chilwa" (ed. Kalk, M., McLachlan, A. J. & Howard-Williams, C.), pp. 419-432.