Factors affecting the diel variation in commercial CPUE of Namibian hake-Can new information improve standard survey estimates?

Fisheries Research

Volumn 88, Issue 1-3, 2007, Pages 70-79

  Johnsen, Espen ^a   Iilende, Titus ^b  

^a INSTITUTE OF MARINE RESEARCH   (Norway)

^b MINISTRY OF FISHERIES AND MARINE RESOURCES   (Namibia)

Author keywords

Diel variation; Hake; Logbook data; Namibia; Trawl surveys

Indexed keywords

MERLUCCIUS CAPENSIS; REXEA SOLANDRI;

EID: 35948980039     PISSN: 01657836     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.fishres.2007.07.013     Document Type: Article

References (26)

1. Adlerstein S., and Ehrich S. Patterns in diel variation of cod catches in North Sea bottom trawl surveys. Fisheries Res. 63 (2003) 169-178
2. Aglen A., Engas A., Huse I., Michalsen K., and Stensholt B.K. How vertical fish distribution may affect survey results. ICES J. Marine Sci. 56 (1999) 345-360
3. Burmeister, L., 2001. Depth-stratified density estimates and distribution of the Cape hake Merluccius capensis and M. paradoxus off Namibia deduced from survey data, 1990-1999. In: Payne, A.I.L., Pillar, S.C., Crawford, R.J.M. (Eds.), A Decade of Namibian Fisheries Science. South African Journal of Marine Science, vol. 23, pp. 347-356.
4. Butterworth D.S., and Rademeyer R.A. Sustainable management initiatives for the Southern African hake fisheries over recent years. Bull. Marine Sci. 76 2 (2005) 287-319
5. Dobson A.J. An Introduction to Generalized Linear Models. second ed. (2002), Chapman & Hall, London
6. Fréon P., Soria M., Mullon C., and Gerlotto F. Diurnal variation in fish density estimate during acoustic surveys in relation to spatial distribution and avoidance reaction. Aquat. Living Resour. 6 (1993) 221-234
7. Godø O.R. Factors affecting the reliability of groundfish abundance estimates from bottom trawl surveys. In: Fernø A., and Olsen S. (Eds). Marine Fish Behaviour in Capture and Abundance Estimation (1994), Fishing News Books, Oxford 166-199
8. Gordoa A., and Macpherson E. Diurnal variation in the feeding activity and catch rate of Cape hake (Merluccius capensis and M. paradoxus) off Namibia. Fisheries Res. 12 4 (1991) 299-305
9. Gordoa A., and Duarte C.M. Size-dependent spatial distribution of hake (Merluccius capensis and Merluccius paradoxus) in Namibian waters. Can. J. Fisheries Aquat. Sci. 48 (1991) 2095-2099
10. Hjellvik V., Godø O.R., and Tjøstheim D. Modelling diurnal variation of marine populations. Biometrics 57 (2001) 189-196
11. Hjellvik V., Godø O.R., and Tjøstheim D. Diurnal variation in bottom trawl surveys catches: does it pay to adjust?. Can. J. Fisheries Aquat. Sci. 59 (2002) 33-48
12. Hjellvik V., Godø O.R., and Tjøstheim D. Decomposing and explaining the variability of bottom trawl survey data from the Barents Sea. Sarsia 89 (2004) 196-210
13. Huse I., Hamukuaya H., Boyer D.C., Malan P.E., and Strømme T. The diurnal vertical dynamics of Cape hake and their potential prey. South African J. Marine Sci. 19 (1998) 365-376
14. Huse, I., Iilende, T., Strømme, T., 2001. Towards a cacthcability constant for trawl surveys of Namibia hake. In: Payne, A.I.L., Pillar, S.C., Crawford, R.J.M. (Eds.), A Decade of Namibian Fisheries Science. South African Journal of Marine Science, vol. 23, pp. 375-383.
15. Iilende, I., Strømme, T., Johnsen, E., 2001. Dynamics of the pelagic component of Namibian hake stocks. In: Payne, A.I.L., Pillar, S.C., Crawford, R.J.M. (Eds.), A Decade of Namibian Fisheries Science. South African Journal of Marine Science, vol. 23, pp. 337-346.
16. Korsbrekke K., and Nakken O. Length and species-dependent diurnal variation of catch rates in the Norwegian Barents Sea bottom-trawl surveys. ICES J. Marine Sci. 56 (1999) 284-291
17. Michalsen K., Godø O.R., and Fernö A. Diel variation in the catchability of gadoids and its influence on the reliability of abundance indices. ICES J. Marine Sci. 53 (1996) 389-395
18. Payne A.I.L. Cape hakes. In: Payne A.I.L., and Crawford R.J.M. (Eds). Oceans of Life off Southern Africa (1989), Cape Town, Vlaeberg 136-147
19. Pillar S.C., and Barange M. Diel variability in bottom trawl catches and feeding activity of the Cape hakes off the west coast of South Africa. ICES J. Marine Sci. 54 3 (1997) 485-499
20. Salthaug A., and Godø O.R. Standardisation of commercial CPUE. Fisheries Res. 49 (2001) 271-281
21. Salthaug A., and Aanes S. Catchability and the spatial distribution of fishing vessels. Can. J. Fisheries Aquat. Sci. 60 (2003) 259-268
22. Shepherd J.G. Fish stock assessments and their data requirements. In: Gulland J.A. (Ed). Fish Population Dynamics. second ed. (1988), John Wiley & Sons, Chichester 35-62
23. Smart W.M. Textbook on Spherical Astronomy. sixth ed. (1977), Cambridge University Press, Cambridge, U.K p. 446
24. Strømme, T., 1992. NAN-SIS: Software for Fishery Survey Data Logging and Analysis. User's Manual. Computerized Information Series (Fisheries) No. 4. FAO, Rome, 103 pp.
25. Sætersdal G., Bianchi G., Strømme T., and Venema S.C. The Dr. Fridtjof Nansen programme 1975-1993. Investigations of fishery resources in developing countries. History of the programme and review of results. FAO Fish. Technol. Pap. 391 (1999) 434
26. Venables W.N., and Ripley B.D. Modern Applied Statistics with S-Plus. fourth ed. (2002), Springer, New York p. 495