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The study involved analysis, performed with standard methods, of length and weight growth of 202 perch individuals caught in November 1999 from the Szczecin Lagoon. The verge coefficient was factored in both when determining the age distribution and when analysing length and weight growth by calculating mean values in age groups (when Kr > 0.50, the number of annual rings was increased by 1).
The feeding experiment described was run within July 19 October 18, 1999 on 536 g (ą20 g) mean individual weight carp individuals aged 1+. The fish were kept in cages stocked at a 50 ind. cage1 density. Experimental treatments differed in the feed offered. The following feeds were used: Danex 1848 (Dan), Carp Growex (Grow), and AT 35 Starter (AT 35). The daily feed doses, amounting to 2.0% metabolic...
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