Abstract
The availability of catch, age/size composition, effort, tagging, and survey data of various sorts is summarized according to the state of development and economic importance of the fishery. Fairly complete catch weight data are usually a prerequisite for any meaningful assessment or management. Data of all these types are available only in very rare cases, and even then the assessment of the stock may be ambiguous.
The information content of each type of data is reviewed. This is most often of a relative nature (e.g., current stock size relative to previous values). Absolute values can usually only be obtained by relatively complex analysis of several sorts of data simultaneously. Current absolute stock size in particular requires expensive data to be collected, and even then is difficult to determine.
The need for such information is, however, dependent on the type of management envisaged. Short-term status quo management can be carried out quite successfully, even without knowing absolute stock size at all accurately. Determination of appropriate long-term management strategies, however, requires much more information (especially of absolute stock sizes and the factors determining recruitment) which is difficult to obtain. Attempts to determine rational long-term management strategies in detail are therefore likely to be worthwhile only for stocks of major economic significance.
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References
Anon. 1981. Report of the ICES ad hoc Working Group on the Use of Effort Data in Assessments. ICES CM 1981/G: 5.
Anon. 1982. Report of the ICES Symposium on Fisheries Acoustics, Bergen, Norway.
Anon. 1983. Report of the ICES Working Group on the Methods of Fish Stock Assessment. ICES CM 1983/Assess: 17.
Collie, J.S., and Sissenwine, M.P. 1982. Estimating population size from relative abundance data. ICES CM 1982/G: 34.
Gulland, J.A. 1983. Fish Stock Assessment: A Manual of Basic Methods. FAO/Wiley.
Hamre, J. 1980. Biology, exploitation and management of the Northeast Atlantic mackerel. Rapp. P.-v. Cons. Int. Exp. Mer 177: 212–242.
Pope, J.G. 1979. Population dynamics and management: current status and future trends. Invest. Pesqu. 43(1): 199–221.
Pope, J.G. 1982. Short-cut formulae for the estimation of coefficients of variation of status quo TAC’s. ICES CM 1982/G: 12.
Pope, J.G. 1982. User requirements for precision and accuracy of acoustic surveys. ICES Symposium on Fisheries Acoustics, Contribution No. 55, Bergen, Norway.
Pope, J.G., and Shepherd, J.G. 1982. A simple method for the consistent interpretation of catch-at-age data. J. du. Cons. Int. Exp. Mer 40(2): 176–184.
Pope, J.G., and Shepherd, J.G. 1983. A comparison of the performance of various methods for tuning VPA’s using effort data. ICES CM 1983/G: 9.
Ricker, W.E. 1975. Computation and interpretation of biological statistics of fish populations. Bull. Fish. Res. Board Can. 191.
Seber, G.A.F. 1973. The Estimation of Animal Abundance and Related Parameters. London: Griffin.
Shepherd, J.G. 1981. Matching fishing capacity to the catches available: a problem in resource allocation. J. Agric. Econ. 32(3): 331–340.
Shepherd, J.G. 1984. Status quo catch estimation and its use in fisheries managment. ICES CM 1984/9: 5.
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© 1984 Berlin, Heidelberg, New York, Tokyo: Springer-Verlag
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Shepherd, J.G. (1984). The Availability and Information Content of Fisheries Data. In: May, R.M. (eds) Exploitation of Marine Communities. Dahlem Workshop Report, vol 32. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-70157-3_4
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DOI: https://doi.org/10.1007/978-3-642-70157-3_4
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