The effect of application of semimoist feeding mixture when converting the advanced fry of zander (Sander lucioperca) to intensive culture conditions
2007
Baranek, V.,Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic). Ustav Zoologie, Rybarstvi, Hydrobiologie a Vcelarstvi | Mares, J.,Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic). Ustav Zoologie, Rybarstvi, Hydrobiologie a Vcelarstvi | Jirasek, J.,Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic). Ustav Zoologie, Rybarstvi, Hydrobiologie a Vcelarstvi | Prokes, M.,Akademie Ved, Brno (Czech Republic). Ustav Biologie Obratlovcu | Spurny, P.,Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic). Ustav Zoologie, Rybarstvi, Hydrobiologie a Vcelarstvi
Conversion success of pond-reared zander fry was evaluated using three different converting methods as follows: direct conversion to dry feed (Bio-Optimal Start 0.8 mm, variant A), three-day application of semimoist feeding mixture on the base of fish (variant B) and three-day application of semimoist mixture + three-day co-feeding of semimoist mixture and dry feed (variant C). Two replicates per treatment were applied. These three methods were evaluated regarding specific growth rate, condition coefficient, survival and cannibalism. Mean initial total length of fish was 35.22+/-2.15 mm and mean individual weight was 0.31+/-0.05 g. There were 600 individuals in each circular tank. The initial stock density was 2 fish/L. Fish survival during a 14-day period ranged from 34.33% (variant C) to 50.33% (variant A). Significantly better conversion performance was achieved with variants A and B than with the variant C regarding all parameters.
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