144 



Fishery Bulletin 94(1). 1996 



Cliff, G., S. F. J. Dudley, and B. Davis. 



1988a. Sharks caught in the protective gill nets off Natal, 

 South Africa. I: The sandbar shark Carcharhinus plumbeus 

 (Nardo). S. Afr. J. Mar. Sci. 7:255-265. 



1988b. An overview of shark catches in Natal's shark nets: 

 1966 to 1986. In Long term data series relating to South- 

 ern Africa's renewable natural resources, p. 84-90. Rep. 

 S. Afr. Natl. Sci. Programs 157. 

 Draper, N. R., and H. Smith. 



1981. Applied regression analysis, 2nd ed. John Wiley & 

 Sons, New York, NY, 709 p. 

 Dudley, S. F. J., and G. Cliff. 



1993a. Some effects of shark nets in the Natal nearshore 

 environment. Environ. Biol. Fishes 36:243-255. 



1993b. Sharks caught in the protective gill nets off Natal, 

 South Africa. 7: The blacktip shark Carcharhinus limbatus 

 (Valenciennes). S. Afr. J. Mar. Sci. 13:237-254. 

 K 1 1 la in, K. A., and G. R. Parsons. 



1989. Age and growth of the blacktip shark, Carcharhinus 

 limbatus, near Tampa Bay, Florida. Fish. Bull. 87:845- 

 857. 

 Schwartz, F. J. 



1983. Shark ageing methods and age estimation of scal- 

 loped hammerhead, Sphyrna lewini, and dusky, Carchar- 

 hinus obscurus, sharks based on vertebral ring counts. In 



E. D. Prince and L. M. Pulos (eds.). Proceedings of the in- 

 ternational workshop on age determination of oceanic pe- 

 lagic fishes: tunas, billfishes, and sharks, p. 167-174. U.S. 

 Dep Commer., NOAATech. Rep. NMFS 8. 

 1984. Occurrence, abundance, and biology of the blacknose 

 shark Carcharhinus acronotus in North Carolina. North- 

 east Gulf Sci. 7(11:29-47. 



Smith, C. L. 



1983. Summary of round table discussions on back 

 calculation. In E. D. Prince and L. M. Pulos (eds.). Pro- 

 ceedings of the international workshop on age determina- 

 tion of oceanic pelagic fishes: tunas, billfishes, and sharks, 

 p. 45-47. U.S. Dep. Commer., NOAATech. Rep. NMFS 8. 



Stevens, J. D. 



1975. Vertebral rings as a means of age determination in 

 the blue shark (Prionace glauca L.). J. Mar. Biol. Assoc. 

 U.K. 55:657-665. 



Wallet, T. S. 



1973. Analysis of shark meshing returns off the Natal 

 coast. M.Sc. thesis. University of Natal, South Africa, 107 p. 



Walter, J. P., and D. A. Ebert. 



1991. Preliminary estimates of age of the bronze whaler 

 Carcharhinus brachyurus (Chondrichthyes: Carchar- 

 hinidae) from southern Africa, with a review of some life 

 history parameters. S. Afr. J. Mar. Sci. 10:37-44. 



