Fig. 2


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Mean growth trajectories of stocked and recaptured common carp (a) and pikeperch (b) in Lake Balaton for the suggested stocking season (early spring in common carp, Specziár and Turcsányi 2014; and late autumn in pikeperch, Specziár and Turcsányi 2015) and according to the temperature adjusted GROTAG model of Francis (1988a). Modelled growth is calculated as: LΔt = L0 + ΔLΔt, where LΔt is the standard length at Δt (years) time after stocking calculated as degree-day sum above 8 °C threshold water temperature and divided by the mean annual degree-day sum of the concerning study period above the same threshold temperature, L0 is the standard length at stocking and ΔLt is the modelled standard length increment according to equation (2b). Modelled growth is shown for two stocking sizes in each species of which the more typical is indicated by continuous whereas the less typical with broken line.

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