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COMPARISON OF EFFICIENCIES OF USING TRAINER FISH AND SHAPE OR TASTE MODIFIED FEED FOR ENCHANCING DIRECT WEANING OF PIKEPERCH (Sander lucioperca L.) YEARLINGS ON DRY FEED
Zoltán Horváth
orcid.org/0000-0002-3718-0397
; University of Pannonia, Georgikon Faculty, Hungary, 8360, Keszthely - Deák Ferenc Street 16
Sándor Németh
; University of Pannonia, Georgikon Faculty, Hungary, 8360, Keszthely - Deák Ferenc Street 16
Gábor Beliczky
; University of Pannonia, Georgikon Faculty, Hungary, 8360, Keszthely - Deák Ferenc Street 16
Zoltán Felföldi
; University of Pannonia, Georgikon Faculty, Hungary, 8360, Keszthely - Deák Ferenc Street 16
Miklós Bercsényi
; University of Pannonia, Georgikon Faculty, Hungary, 8360, Keszthely - Deák Ferenc Street 16
Sažetak
Two practical methods aimed at the enhancement of efficiencies of weaning pond-raised pikeperch (Sander lucioperca L.) yearlings on dry feed were compared in two consecutive experiments. The first method was applying pellet-feeding fish as trainers/teachers for naive fish. As trainers, either pikeperch or perch (Perca fluviatilis L.) were used. The treatments and control (without trainer fish) were run in triplicates (9 aquaria, 40 fish/aquarium). Pikeperch yearlings were not able to learn to eat dry feed by social learning. In contrast, the presence of trainers decreased the success of weaning of naive fingerlings non-significantly (2.2% with pikeperch trainers; 7.8% with perch trainers; 8.3 % with only naive fish).
The second method was to modify the taste and shape of the pellet. Bullet-form feed pellets were ground and reshaped as “artificial blood worms” (ABW). ABW were flavored either by Chironomus mixture or by a commercial aroma. Non-flavored ABW served as a control. Commercial aroma flavored ABW significantly increased the percentage of weaned fish (16.7%) in comparison to the bloodworm flavored (12.2%) and non-flavored (4.4%) ones.
Ključne riječi
pikeperch; social learning; weaning; dry feed
Hrčak ID:
112696
URI
Datum izdavanja:
30.12.2013.
Posjeta: 1.536 *