Reviews in Fish Biology and Fisheries 8, 473±480 (1998) Points of view The problems of estimating potential yield in data-sparse lake ®sheries: a new family of approximate models with examples from African lakes TONY J. PITCHER and ALIDA B UNDY Fisheries Centre, University of British Columbia, Vancouver, Canada V6T 1Z4 Keywords: African lakes, approximate models, data-sparse lake ®sheries, lake ®sheries, morphoedaphic index Introduction Estimation of the potential yield of ®sheries in the African lakes is important not only on account of a ®shery's ecological, economic and social impacts but also because, when compared to current harvest, it may provide an approximate assessment of status and sustainability. But estimating potential yields presents problems in many African lakes, because catch and effort data with which to perform such estimation are sparse and highly uncertain. In this Point of View we discuss a new family of approximate estimation models in an attempt to encourage new ways of dealing with this problem. The method, based on numerical comparison of the productive potential of the lake ecosystem and of the ®sh, takes advantage of better information being available from one lake than from others. The principal uncertainties in process and estimation errors are described
Reviews in Fish Biology and Fisheries – Springer Journals
Published: Oct 6, 2004
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