1. Anderson DT (1962) The reproduction and early life history of the gastropods Bembicium auratum (Quoy and Gaimard) (Family Littorinidae), Cellana tramoserica (Sower.) (Family Patellidae) and Melanerita melanotragus (Smith) (Family Neritidae). Proc Linn Soc NSW 87:62?68
2. Bernard FR (1977) Fishery and reproductive cycle of the red sea urchin, Strongylocentrotus fransiscanus, in British Columbia. J Fish Res Bd Can 34:604?610
3. Beverton RJH, Holt SJ (1957) On the dynamics of exploited fish populations. Fishery Investigation Ser II. Vol XIX. London: Her Majesties Stationary office
4. Branch GM (1974) The ecology of Patella (L.) from the Cape Peninsula, South Africa. 2 Reproductive cycles. Trans roy Soc S Afr 41:112?160
5. Charnov EL, Krebs JR (1973) On clutch size and fitness. Ibis 116:217?219