Spatial and temporal variation in the density of northern cod and a review of hypotheses for the stock's collapse

Canadian Journal of Fisheries and Aquatic Sciences

Volumn 53, Issue 5, 1996, Pages 943-962

  Hutchings, Jeffrey A ^a  

^a DALHOUSIE UNIVERSITY   (Canada)

Author keywords

[No Author keywords available]

Indexed keywords

COD; DEPLETED STOCKS; FISHERY COLLAPSE; FISHERY MODELS; FISHING MORTALITY; GADOID FISHERIES; POPULATION DENSITY; STOCK BIOMASS;

CANADA, LABRADOR; CANADA, NEWFOUNDLAND;

GADIFORMES; GADUS MORHUA;

EID: 85047677326     PISSN: 0706652X     EISSN: None     Source Type: Journal    
DOI: 10.1139/f96-097     Document Type: Article

References (68)

1. Alverson, D.L., Freeberg, M.H., Murawaski, S.A., and Pope, J.G. 1994. A global assessment of fisheries bycatch and discards. FAO Fish. Tech. Pap. No. 339.
2. Atlantic Groundfish Advisory Committee. 1992. Summary minutes of the Atlantic Groundfish Advisory Committee meeting, 25 November 1992, Halifax, N.S.
3. Angel, J.R., Burke, D.L., O'Boyle, R.N., Peacock, F.G., Sinclair, M, and Zwanenburg, K.C.T. 1994. Report of the workshop on Scotia-Fundy groundfish management from 1977 to 1993. Can. Tech. Rep. Fish. Aquat. Sci. No. 1979.
4. Atkinson, D.B. 1993. Some observations on the biomass and abundance of fish captured during stratified random bottom trawl surveysin NAFO divisions 2J3KL, fall 1981-1991. NAFO Sci. Counc. Res. Doc. No. 93/29. Northwest Atlantic Fisheries Centre, St. John's, Nfld.
5. Atkinson, D.B., and Bennett, B. 1994. Proceedings of a northern cod workshop held in St. John's, Newfoundland, Canada, January 27-29, 1993. Can. Tech. Rep. Fish. Aquat. Sci. No. 1999.
6. Baird, J.W., Bishop, C.A., and Murphy, E.F. 1991. Sudden changes in the perception of stock size and reference catch levels in northeastern Newfoundland shelves. NAFO Sci. Counc. Stud. 16: 111-119.
7. Bentzen, P., Taggart, C.T., Ruzzante, D.E., and Cook, D. 1997. Microsatellite polymorphism and the population structure of Atlantic cod (Gadus morhiia) in the northwest Atlantic. Can. J. Fish. Aquat. Sci. In press.
8. Bishop, C.A., Murphy, E.F., Davis, M.B., Baird, J.W., and Rose, G.A. 1993. An assessment of the cod stock in NAFO divisions 2J+3KL. NAFO Sci. Counc. Res. Doc. No. 93/86. Northwest Atlantic Fisheries Centre, St. John's, Nfld.
9. Bishop, C.A., Anderson, J., Dalley, E., Davis, M.B., Murphy, E.F., Rose, O.A., Stansbury, D.E., Taggart, C., Winters, G., and Methven, D. 1994. An assessment of the cod stock in NAFO divisions 2J+3KL. NAFO Sci. Counc. Res. Doc. No. 94/40. Northwest Atlantic Fisheries Centre, St. John's, Nfld.
10. Brawn, V.M. 1961. Aggressive behaviour in the cod (Gadus callarias L.). Behaviour, 18: 107-147.
11. Brodie, W., Morgan, J., and Bowering, W.R. 1995. An update of the status of the stock of American plaice in subarea 2 + div. 3K. DFO Atl. Fish. Res. Doc. No. 95/35. Department of Fisheries and Oceans, Ottawa, Ont.
12. Brothers, G., and Hollett, J. 1991. Effect of mesh size and shape on the selectivity of cod traps. Can. Tech. Rep. Fish. Aquat. Sci. No. 1782.
13. Brothers, G., and Peddle, J. 1991. Cod trap mesh selectivity study 1991. Gear Conversion Project Rep. No. 1991-182. Department of Fisheries and Oceans, Newfoundland Region, St. John's, Nfld.
14. Chouinard, G.A., and Metuzals, K.I. 1984. Discards of cod (Gadus morhua) and American plaice (Hippoglossoides platessoides) in NAFO division 4T during 1984. CAFSAC Res. Doc. No. 85/84. Canadian Atlantic Fisheries Scientific Advisory Committee, Dartmouth, N.S.
15. Cochran, W.G. 1977. Sampling techniques. John Wiley & Sons, New York.
16. Colbourne, E. 1995. Environmental conditions in Atlantic Canada, summer 1995, with comparisons to the 1961-1990 average. DFO Atl. Fish. Res. Doc. No. 95/98. Department of Fisheries and Oceans, Ottawa, Ont.
17. de Young, B., and Rose, G.A. 1993. On recruitment and distribution of Atlantic cod (Gadus morhua) off Newfoundland. Can. J. Fish. Aquat. Sci. 50: 2729-2741.
18. Department of Fisheries and Oceans. 1995. Report on the status of Canadian managed groundfish stocks of the Newfoundland region. DFO Atl. Fish. Stock Status Rep. No. 95/4E. Department of Fisheries and Oceans, Ottawa, Ont.
19. Drinkwater, K.F., Pettipas, R.G., and Petrie, W.M. 1995. Overview of physical oceanographic conditions in the Scotia-Fundy Region in 1994. DFO Atl. Fish. Res. Doc. No. 95/19. Department of Fisheries and Oceans, Ottawa, Ont.
20. Fretwcll, S.D., and Lucas, J.H.J. 1970. On territorial behaviour and other factors influencing habitat distribution in birds. Acta Biotheor. 19: 16-36.
21. Fisheries Resource Conservation Council. 1995. Conservation: come aboard. 1996 conservation requirements for Atlantic groundfish. Report to the Minister of Fisheries and Oceans, November 1995. Fisheries Resource Conservation Council, Ottawa, Ont.
22. Gomes, M.C., Haedrich, R.L., and Villagarcia, M.G. 1995. Spatial and temporal changes in the groundfish assemblages on the north-east Newfoundland/Labrador Shelf, north-west Atlantic, 1978-1991. Fish. Oceanogr. 4: 85-101.
23. Haedrich, R.L. 1995. Structure over time of an exploited deep-water fish assemblage. In Deep-water fisheries of the North Atlantic oceanic slope. Edited by A.G. Hopper. Kluwer Academic Publ., Dordrecht, Netherlands, pp. 27-50.
24. Halliday, R.G. 1987. Haddock spawning area closures in the Northwest Atlantic, 1970-1987. NAFO Sci. Counc. Res. Doc. 87/13. Northwest Atlantic Fisheries Centre, St. John's, Nfld.
25. Hutchings, J.A. 1995. Seasonal marine protected areas within the context of spatio-temporal variation in the northern cod fishery. In Marine protected areas and sustainable fisheries. Edited by N. Shackell and M. Willison. Science and Management of Protected Areas Association, Wolfville, N.S. pp. 39-53.
26. Hutchings, J.A., and Myers, R.A. 1994a. What can be learned from the collapse of a renewable resource? Atlantic cod, Gadus morhua, of Newfoundland and Labrador. Can. J. Fish. Aquat. Sci. 51: 2126-2146.
27. Hutchings, J.A, and Myers, R.A. 19946. Timing of cod reproduction: interannual variability and the influence of temperature. Mar. Ecol. Prog. Ser. 108:21-31.
28. Hutchings, J.A., and Myers, R.A. 1995. The biological collapse of Atlantic cod off Newfoundland and Labrador: an exploration of historical changes in exploitation, harvesting technology, and management. In The North Atlantic fisheries: successes, failures, and challenges. Edited by R. Arnason and L. Felt. Institute of Island Studies, University of Prince Edward Island, Charlottetown, P.E.I, pp. 37-93.
29. Hutchings, J.A., Myers, R.A., and Lilly, G.R. 1993. Geographic variation in the spawning of Atlantic cod, Gadus morhua, in the Northwest Atlantic. Can. J. Fish. Aquat. Sci. 50: 2457-2467.
30. Hutchings, J.A., Neis, B., and Ripley, P. 1996. The "nature" of cod (Gadus morhua): perceptions of stock structure and cod behaviour by fishermen, "experts" and scientists from the nineteenth century to the present. In Marine resources and human societies in the North Atlantic since 1500. Edited by D. Vickers. Inst. Soc. Econ. Res. Memorial University of Newfoundland, St. John's, Nfld. In press.
31. Kulka, D.W. 1989. Methods employed by the Canadian offshore fleet as a means to limit the size of catches in the 2J3KL cod fishery. CAFSAC Res. Doc. No. 89/32. Canadian Atlantic Fisheries Scientific Advisory Committee, Dartmouth, N.S.
32. Kulka, D.W., Wroblewski, J.S., and Narayanan, S. 1995. Recent changes in the winter distribution and movements of northern Atlantic cod (Gadus morhua Linnaeus, 1758) on the Newfoundland-Labrador Shelf. ICES J. Mar. Sci. 52: 889-902.
33. Lear, W.H. 1984. Discrimination of the stock complex of Atlantic cod (Gadus morhua) off southern Labrador and eastern Newfoundland, as inferred from tagging studies. J. Northwest All. Fish. Sci. 5: 143-159.
34. Lear, W.H., and Parsons, L.S. 1993. History and management of the fishery for northern cod in NAFO Divisions 2J, 3K and 3L. In Perspectives on Canadian marine fisheries management. Edited by L.S. Parsons and W.H. Lear. Can. Bull. Fish. Aquat. Sci. No. 226. pp. 55-89.
35. Lilly, G.R. 1995. Did the feeding level of the cod off southern Labrador and eastern Newfoundland decline in the 1990s? DFO All. Fish. Res. Doc. No. 95/74. Department of Fisheries and Oceans, Ottawa, Ont.
36. Mann, K.H., and Drinkwater, K.F. 1994. Environmental influences on fish and shellfish production in the Northwest Atlantic. Environ. Rev. 2: 16-32.
37. McGrath, P.T. 1911. Newfoundland in 1911. Whitehead, Morris, and Co., London.
38. Mohn, R., and Bowen, W.D. 1994. A model of grey seal predation on 4Vs W cod and its effects on the dynamics and potential yield of cod. DFO .Res. Doc. No. 94/64. Department of Fisheries and Oceans, Ottawa, Ont.
39. Myers, R.A., and Cadigan, N.G. 1995a. Statistical analysis of catch-at-age data with correlated errors. Can. J. Fish. Aquat. Sci. 52: 1265-1273.
40. Myers, R.A., and Cadigan, N.G. 19956. Was an increase in natural mortality responsible for the collapse of northern cod? Can. J. Fish. Aquat. Sci. 52: 1274-1285.
41. Myers, R.A., and Stokes, K. 1989. Density-dependent habitat utilization of groundfish and the improvement of research surveys. ICES C.M. 1989/D:15. International Council for the Exploration of the Sea, Charlottenlund, Denmark.
42. Myers, R.A., Drinkwater, K.F., Barrowman, N.J., and Baird, J.W. 1993. Salinity and recruitment of Atlantic cod (Gadus morhua) in the Newfoundland Region. Can. J. Fish. Aquat. Sci. 50: 1599-1609.
43. Myers, R.A., Barrowman, N.J., and Hoenig, J.M. 1995a. Estimates of cod mortality in the Newfoundland region from tagging data. DFO All. Fish. Res. Doc. No. 95/93. Department of Fisheries and Oceans, Ottawa, Ont.
44. Myers, R.A., Barrowman, N.J., Hutchings, J.A., and Rosenberg, A.A. 1995b. Population dynamics of exploited fish stocks at low population levels. Science (Washington, D.C.), 269: 1106-1108.
45. Myers, R.A., Hutchings, J.A., and Barrowman, N.J. 1996a. Why do fish stocks collapse? The example of cod in Atlantic Canada. Ecol. Appl. In press.
46. Myers, R.A., Hutchings, J.A., and Barrowman, N.J. 19966. Hypotheses for the decline of cod in the North Atlantic. Mar. Ecol. Prog. Ser. In press.
47. Myers, R.A., Barrowman, N.J., and Hutchings, J.A. 1997. Inshore exploitation of Newfoundland cod since 1948 as estimated from mark-recapture data. Can. J. Fish. Aquat. Sci. In press.
48. Neis, B. 1992. Fishers' ecological knowledge and stock assessment in Newfoundland. Nfld. Stud. 8: 155-178.
49. Palmer, C.T., and Sinclair, P.R. 1996. Perceptions of a fishery in crisis: dragger skippers on the Gulf of St. Lawrence cod moratorium. Soc. Nat. Resour. In press.
50. Pauly, D. 1995. Anecdotes and the shifting baseline syndrome of fisheries. Trends Ecol. Evol. 10: 430.
51. Pitcher, T.J., and Parrish, J.K. 1993. Functions of shoaling behaviour in teleosts. In Behaviour of teleost fishes. Edited by T.J. Pitcher. Chapman and Hall, New York. pp. 363-439.
52. Rose, G.A. 1993. Cod spawning on a migration highway in the northwest Atlantic. Nature (London), 366: 458-461.
53. Rose, G.A., Atkinson, B.A., Baird, J., Bishop, C.A., and Kulka, D.W. 1994. Changes in distribution of Atlantic cod and thermal variations in Newfoundland waters, 1980-1992. ICES Mar. Sci. Symp. 198: 542-552.
54. Ruzzante, D.E., Taggart, C.T., Cook, D., and Goddard, S. 1996. Genetic differentiation between inshore and offshore Atlantic cod (Gadus morhua L.) off Newfoundland: microsatellite DNA variation and antifreeze level. Can. J. Fish. Aquat. Sci. 53: 634-645.
55. Shackell, N.L., and Willison, J.H.M. (Editors). 1995. Marine protectedareas and sustainable fisheries. Science and Management of Protected Areas Association, Wolfville, N.S.
56. Shelton, P.A., Stenson, G.B., Sjare, B., and Warren, W.G. 1995. Model estimates of harp seal numbers at age for the Northwest Atlantic. DFO All. Fish. Res. Doc. No. 95/21. Department of Fisheries and Oceans, Ottawa, Ont.
57. Sinclair, A., Chouinard, G., Swain, D., Nielsen, G., Hanson, M., Currie, L., Hurlbut, T., and Hebert, R. 1995. Assessment of the southern Gulf of St. Lawrence cod stock, March 1995. DFO All. Fish. Res. Doc. No. 95/39. Department of Fisheries and Oceans, Ottawa, Ont.
58. Stenson, G.B., Hammill, M.O., and Lawson, J.W. 1995. Predation of Atlantic cod, capelin, and Arctic cod by harp seals in Atlantic Canada. DFO All. Fish. Res Doc. No. 95/72. Department of Fisheries and Oceans, Ottawa, Ont.
59. Swain, D.P., and Sinclair, A.F. 1994. Fish distribution and catchability: What is the appropriate measure of distribution? Can. J. Fish. Aquat. Sci. 51: 1046-1054.
60. Swain, D.P., and Wade, E.J. 1993. Density-dependent geographic distribution of Atlantic cod (Gadus morhua) in the southern Gulf of St. Lawrence. Can. J. Fish. Aquat. Sci. 50: 725-733.
61. Swain, O.P., Nielsen, G.A., Sinclair, A.F., and Chouinard, G.A. 1994. Changes in catchability of Atlantic cod (Gadus morhua) to an ottef-trawl fishery and research survey in the southern Gulf of St. Lawrence. ICES J. Mar. Sci. 51: 493-504.
62. Taggart, C.T., Anderson, J., Bishop, C., Colboume, E., Hutchings, J., Lilly, G., Morgan, J., Murphy, E., Myers, R., Rose, G., and Shelton, P. 1994. Overview of cod stocks, biology, and environment in the northwest Atlantic region of Newfoundland with emphasis on northern cod. ICES Mar. Sci. Symp. 198: 147-157.
63. Templeman, W. 1962. Divisions of cod stocks in the Northwest Atlantic. Int. Comm. Northwest Atl. Fish. Redb. Part III, 1962. pp. 79-123.
64. Templeman, W. 1965. Marine resources of Newfoundland. Bull. Fish. Res. Board Can. No. 154.
65. Walsh, S.J., Brodie, W.B., Bishop, C.A, and Murphy, E.F. 1995. Fishing on juvenile groundfish nurseries on the Grand Bank: a discussion of technical measures of conservation. In Marine protected areas and sustainable fisheries. Edited by N. Shackell and M. Willison. Science and Management of Protected Areas Association, Wolfville, N.S. pp. 54-73.
66. Warner, W.W. 1877. Distant water: the fate of the North Atlantic fisherman. Little, Brown, & Co., Boston, Mass.
67. Warren, W.G. 1997. Changes in the within-survey spatio-temporal structure of the northern cod population 1985-1991. Can. J. Fish. Aquat. Sei. In press.
68. Wroblewski, J.S., Kulka, D.W., Narayanan, S., Oake, A.M., Collier, A.G., and McGrath, B.D. 1995. Winter distribution and movements of northern Atlantic cod (Gadus morhua) along the Newfoundland-Labrador continental shelf edge derived from observations on commercial trawlers. Fish. Oceanogr. 4: 128-146.