Monthly variability in the catchability of Namibian hake and its relationship with environmental seasonality

Fisheries Research

Volumn 48, Issue 2, 2000, Pages 185-195

  Gordoa, Ana ^a   Masó, Mercedes ^b   Voges, Lizette ^c  

^a CENTRE D ESTUDIS AVANÇATS DE BLANES CEAB CSIC   (Spain)

^b INSTITUT DE CIÈNCIES DEL MAR   (Spain)

^c Min of Fish and Marine Resources   (Namibia)

Author keywords

Catchability; Environment; Hake (Merluccius capensis, Merluccius paradoxus); Sea surface temperature (SST); Upwelling

Indexed keywords

CATCH PER UNIT EFFORT; FISHERY PRODUCTION; SEA SURFACE TEMPERATURE; SEASONALITY;

NAMIBIA;

EID: 0033853897     PISSN: 01657836     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0165-7836(00)00160-0     Document Type: Article

References (32)

1. Angelsen K.K.R., Olsen S. Impact of fish density and effort level on catching efficiency of fishing gear. Fish. Res. 5:1987;271-278.
2. Atran S.M., Loesch J.G. An analysis of weekly fluctuations in catchability coefficients. Fish. Bull. 93:1995;562-567.
3. Bezzi, S.I., Verazay, G.A., Dato, C.V., 1995. Biology and fisheries of Argentine hakes (M. hubbsi and M. australis). In: Alheit, J., Pitcher, T. (Eds.), Hake Fisheries, Ecology and Markets. Chapman & Hall, London.
4. Boyd, A.J., Agenbag, J.J., 1985. Seasonal trends in the long shore distribution of surface temperatures off south-western Africa 18°-34°S, and their relation to subsurface conditions and currents in the area 21°-24°S. In: Bas, C., Margalef, R., Rubiés, P. (Eds.), International Symposium on the Most Important Upwelling Areas off Western Africa, pp. 119-148.
5. Boyd, A., Salat, J., Masó, M., 1987. The seasonal intrusion of relatively saline water on the shelf off northern and central Namibia. In: Payne et al. (Eds.), The Benguela and Comparable Ecosystems. S. Afr. J. Mar. Sci. 5, 107-120.
6. Brandhorst W. Relationship between the hake fishery and southerly sub-surface return flow below the Peru current off the Chilean coast. Nature. 183:1959;1832-1833.
7. Crecco V., Overholtz W.J. Causes of density-dependent catchability for Georges Bank Haddock Melanogrammus aeglefinus. Can. J. Fish. Aquat. Sci. 47:1990;385-394.
8. Fox D.S., Starr R.M. Comparison of commercial fishery and research catch data. Can. J. Fish. Aquat. Sci. 53:1996;2681-2694.
9. Fréchet, A., 1988. Evaluation du stock de morue de la subdivision 3Pn et des divisions 4R et 4S de l'OPANO en 1987. CAFSAC Res. Doc. 88/24, 66 pp.
10. Fréchet A. Catchability variations of cod in the marginal ice zone. Can. J. Fish. Aquat. Sci. 47:1990;1678-1683.
11. Gordoa A., Duarte C.M. Size-dependent spatial distribution of hake (Merluccius capensis and Merluccius paradoxus) in Namibian waters. Can. J. Fish. Aquat. Sci. 48:1991;2095-2099.
12. Gordoa A., Hightower J.E. Changes in catchability in a bottom-trawl fishery for Cape hake (Merluccius capensis). Can. J. Fish. Aquat. Sci. 48:1991;1887-1991.
13. Gordoa A., Macpherson E. Diurnal variation in the feeding activity and catch rate of Cape hake (Merluccius capensis and M. paradoxus). Fish. Res. 12:1991;299-305.
14. Gordoa, A., Macpherson, E., Olivar, M.P., 1995. Biology and fisheries of Namibian hakes (M. Paradoxus and M. Capensis). In: Alheit, J., Pitcher, T. (Eds.), Hake Fisheries, Ecology and Markets. Chapman & Hall, London.
15. Hutchings J., Myers R.A. What can be learned from the collapse of a renewable resource? Atlantic cod, Gadus morhua, of Newfoundland and Labrador. Can. J. Fish. Aquat. Sci. 51:1994;2126-2146.
16. Macpherson E., Gordoa A. Effect of prey densities on cannibalism in Cape hake (Merluccius capensis) off Namibia. Mar. Biol. 119:1994;145-149.
17. Macpherson E., Masó M., Barange M., Gordoa A. Relationship between measurements of hake biomass and sea surface temperature off southern Namibia. S. Afr. J. Mar. Sci. 10:1991;213-217.
18. Pennington M., StrØmme T. Surveys as a research tool for managing dynamic stocks. Fish. Res. 37:1998;97-106.
19. Pillar S.C., Barange M. Diel feeding periodicity. Daily ration and vertical migration of juvenile Cape hake off the west coast of South Africa. J. Fish . Biol. 47:1995;753-768.
20. Pillar S.C., Barange M. Diel variability in bottom trawl catches and feeding activity of the Cape hakes off the west coast of South Africa. ICES J. Mar. Sci. 54:1997;485-499.
21. Pillar S.C., Wilkinson I.S. The diet of Cape hake Merluccius capensis on the south coast of South Africa. S. Afr. J. Mar. Sci. 15:1995;225-239.
22. Pope J.G., Garrod D.J. Sources of error in catch and effort quota regulations with particular reference to variation in the catchability coefficient. ICNAF Res. Bull. 11:1975;17-30.
23. Roel B., Macpherson E. Feeding of Merluccius capensis and Merluccius paradoxus off Namibia. S. Afr. J. Mar. Sci. 6:1988;227-243.
24. Salat, J., Masó, M., Boyd, A., 1992. Water mass distribution and geostrophic circulation off Namibia during April 1986. Continent Shelf Res. 12, 355-366.
25. Shannon, L.V., 1985. The Benguela ecosystem. 1. Evolution of the Benguela, physical features and processes. In: Barnes, M.(Ed.), Oceanography and Marine Biology: An Annual Review 23. Aberdeen University Press, Aberdeen, pp. 105-182.
26. Shannon L.V., Boyd A.J., Brundit G.B., Tauton-Clark J. On the existence of an El Niño type phenomenon in the Benguela system. J. Mar. Res. 44:1986;495-520.
27. Shannon L.V., Crawford R.J.M., Brundrit G.B., Underhill L.G. Responses of fish populations in the Benguela ecosystem to environmental change. J. Cons. Int. Explor. Mer. 45:1988;5-12.
28. StatSoft, 1996. STATISTICA for windows, 1994, Tulsa.
29. Swain D.P., Nielsen G.A., Sinclair A.F., Chouinard G.A. Changes in catchability of Atlantic cod (Gadus morhua ) to an ooter-trawl fishery and research survey in the southern Gulf of St Lawrance. ICES J. Mar. Sci. 51:1994;493-504.
30. Swain, D.P., Sinclair A.F.,1994. Fish distribution and catchability: what is the appropriate measure of distribution? Can. J. Fish. Aquat. Sci. 51, 1046-1054.
31. Sylvia, G., 1995. Global markets and products of hake. In: Alheit, J., Pitcher, T. (Eds.), Hake Fisheries, Ecology and Markets. Chapman & Hall, London.
32. Walters C., Maguire J.-J. Lessons for stock assessment from the northern cod collapse. Rev. Fish. Biol. Fish. 6:1996;125-137.