Smith and Jamieson: Movement and mortality of Cancer magister 



147 



survivorship. The recognition of such a high mortality 

 rate for adults of this commercially important species 

 immediately prompts questions regarding the appro- 

 priateness of both the Canadian and American (=159 

 mm CW) minimum legal carapace width limits for 

 optimizing two of the most basic stock-management 

 guidelines: yield-per-recruit and eggs-per-recruit. 



Acknowledgments 



We are grateful to Messrs. A. Phillips, D. Heritage, 

 and W. Harling who provided most of the field support, 

 and to Dr. L.J. Richards and Mr. J. Fulton who re- 

 viewed a previous version of this paper. We extend 

 special thanks to the fishermen of Tofino who par- 

 ticipated in the mark-recovery program and expressed 

 a keen interest in our activities. 



Citations 



Armstrong, D.A., and D.R. Gunderson 



1985 The role of estuaries in Dungeness crab early life history: 

 A case study in Grays Harbor, Washington. In Melteff, B.R. 

 (ed.), Proceedings of the symposium on Dungeness crab biology 

 and management, p. 145-169. Alaska Sea Grant Rep. 85-3, 

 Univ. Alaska, Fairbanks. 



Bennett, D.B., and C.G. Brown 



1983 Crab (Cancer pagurus) migrations in the English Chan- 

 nel. J. Mar. Biol. Assoc. U.K. 63:371-398. 

 Botsford, L.W. 



1986 Population dynamics of the Dungeness crab (Cancer 

 magister). In Jamieson, G.S., and N. Bourne (eds.), North 

 Pacific workshop on stock assessment and management of in- 

 vertebrates, p. 140-153. Can. Spec. Publ. Fish. Aquat. Sci. 92. 



Botsford, L.W., and D.E. Wickham 



1978 Behavior of age-specific, density-dependent models and 

 the northern California Dungeness crab (Cancer magister) 

 fishery. J. Fish. Res. Board Can. 35:833-843. 

 Botsford, L.W., R.D. Methot Jr.. and W.J. Johnston 



1983 Effort dynamics of the northern California Dungeness 

 crab (Cancer magister) fishery. Can. J. Fish. Aquat. Sci. 40: 

 337-346. 

 Butler, T.H. 



1957 The tagging of the commercial crab in the Queen Char- 

 lotte Islands region. Fish. Res. Board Can. Pac. Prog. Rep. 

 109:16-19. 



1960 Maturity and breeding of the Pacific edible crab, Cancer 

 magister Dana. J. Fish. Res. Board Can. 17:641-646. 



1961 Growth and age determination of the Pacific edible crab 

 Cancer magister Dana. J. Fish. Res. Board Can. 18:873-889. 



Diamond, N., and D.G. Hankin 



1985 Movements of adult female Dungeness crabs (Cancer 

 magister) in northern California based on tag recoveries. Can. 

 J. Fish. Aquat. Sci. 42:919-926. 

 Dinnel, P.A., D.A. Armstrong, R.R. Lauth, and G.S. Jamieson 

 1987 Use of the PISCES IV submersible for determining the 

 distributions of Dungeness crab, shrimp, and bottomfish in Port 

 Gardner, Washington. Fish. Res. Inst. Final Rep. FRI- 

 UW-8709, Univ. Wash., Seattle, 16 p. 



Gotshall, D.W. 



1978 Northern California Dungeness crab, Cancer magister, 

 movements as shown by tagging. Calif. Fish Game 64: 

 234-254. 

 Gunderson, D.R., and I.E. Ellis 



1986 Development of a plumb staff beam trawl for sampling 

 demersal fauna. Fish. Res. (Amst.) 4:35-41. 

 Gunderson, D.R., D.A. Armstrong, and C. Rogers 



1985 Sampling design and methodology for juvenile Dungeness 

 crab surveys. In Melteff, B.R. (ed.). Proceedings of the sym- 

 posium on Dungeness crab biology and management, p. 

 135-144. Alaska Sea Grant Rep. 85-3, Univ. Alask, Fairbanks. 

 Hankin, D.G., N. Diamond, M. Mohr, and J. Ianelli 



1985 Molt increments, annual molting probabilities, fecundity 

 and survival rates of adult female Dungeness crabs in northern 

 California. In Melteff, B.R. (ed.), Proceedings of the sympo- 

 sium on Dungeness crab biology and management, p. 189-206. 

 Alaska Sea Grant Rep. 85-3, Univ. Alaska, Fairbanks. 

 Hankin, D.G., N. Diamond, M.S. Mohr, and J. Ianelli 



1989 Growth and reproductive dynamics of adult female 

 Dungeness crabs (Cancer magister) in northern California. J. 

 Cons. Cons. Int. Explor. Mer 46:94-108. 

 Howard, A.E. 



1982 The distribution and behavior of ovigerous edible crabs 

 (Cancer pagurus), and consequent sampling bias. J. Cons. 

 Cons. Int. Explor. Mer 40:259-261. 

 Hyland. S.J., B.J. Hill, and C.P. Lee 



1984 Movement within and between different habitats by the 

 portunid crab Scylla serrata. Mar. Biol. (Berl.) 80:57-61. 

 Jamieson, G.S., and A.C. Phillips 



1988 Occurrence of Cancer crab (C magister and C. oregonen- 

 sis) megalopae off the west coast of Vancouver Island, British 

 Columbia. Fish. Bull., U.S. 86:525-542. 

 Kendall, M., and A. Stuart 



1979 The advanced theory of statistics, Vol. 2. Inference and 

 relationship, 4th ed. MacMillan, NY, 748 p. 



McKelvey, R., D. Hankin, R. Yanosko, and C. Snygg 



1980 Stable cycles in multistage recruitment models: An ap- 

 plication to the northern California Dungeness crab (Cancer 

 magister) fishery. Can. J. Fish. Aquat. Sci. 37:2323-2345. 



Methot, R.D. Jr. 



1986 Management of Dungeness crab fisheries. In Jamieson, 

 G.S., and N. Bourne (eds.), North Pacific workshop on stock 

 assessment and management of invertebrates, p. 326-334. 

 Can. Spec. Publ. Fish. Aquat. Sci. 92. 

 Methot, R.D. Jr., and L.W. Botsford 



1982 Estimated preseason abundance in the California Dunge- 

 ness crab (Cancer magister) fisheries. Can. J. Fish. Aquat. 

 Sci. 39:1077-1083. 

 Mittertreiner, A., and J. Schnute 



1985 Simplex: A manual and software package for easy non- 

 linear parameter estimation and interpretation in fishery 

 research. Can. Tech. Rep. Fish. Aquat. Sci. 1384, 90 p. 

 Nelder, J. A., and R. Mead 



1965 A simplex method for function minimization. Computer 

 J. 7:308-313. 

 Pielou, E.C. 



1977 Mathematical ecology. John Wiley, NY, 384 p. 

 Ricker, W.E. 



1975 Computation and interpretation of biological statistics 

 offish populations. Bull. Fish. Res. Board Can. 191, 382 p. 

 Schnute, J., and D. Fournier 



1980 A new approach to length frequency analysis: Growth 

 structure. Can. J. Fish. Aquat. Sci. 37:1337-1351. 



