ISSN:
1573-5117
Keywords:
fish stock assessment
;
management
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract In 1977, the average fish yield in the oligotrophic and oligohumic lake Konnevesi was 6.4 kg ha−1 (2.6 kg vendace, 1.3 kg perch, 0.7 kg whitefish, 0.5 kg roach, 0.3 kg pike and 0.3 kg burbot). In that year the stock of vendace was exceptionally poor. A study was made to determine the optimum strategy for exploiting the stocks. The field work included test fishing (1970–78), sampling of catches (1977–80) and collection of catch per unit effort data (1978–80), and catch statistics (1969, 1970, 1977). The stocks were assessed by the Beverton and Holt method. Whitefish is exploited at a proper level. Fishing of vendace and roach can be increased, and the yield of pike would be greater, if the recruiting age were higher than at present.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00005814
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