CONDITION AND CPUE OF EUROPEAN GRAYLING Thymallus thymallus L. POPULATION IN THE CROATIAN KUPA RIVERReportar como inadecuado




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Journal of Central European Agriculture, Vol.6 No.4 May 2006. -

The study was carried out on the material of 98 European grayling Thymallus thymallus L., 1758 from upper part Kupa river, in northwest Croatia. The research included angling by fly fishing tackle and collecting the data of fish species characteristics. Values of condition factor CF ranged from 0.615 to 2.239, but average value of this parameter is 1.094±0.27. The condition factor by dates of sampling indicated that all grayling caught before November, have had a negative condition factor. The quantity of fish present in the upper part of the Kupa river was evaluated using the catch per unit efforts CPUE parameter. The average value of CPUE parameter is 2.25±1.01.

European grayling; Thymallus; condition factor; CPUE; Croatia



Autor: Nikica Šprem - Tomljanović TEA - Marina Piria - Tomislav Treer - Safner ROMAN - Ivica Aničić -

Fuente: http://hrcak.srce.hr/



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