| Autor: |
Kwasek, Karolina, Dabrowski, Konrad, Ware, Kyle, Reddish, John Mark, Wick, Macdonald |
| Předmět: |
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| Zdroj: |
Aquaculture Research; Aug2012, Vol. 43 Issue 9, p1384-1391, 8p, 1 Diagram, 2 Charts, 4 Graphs |
| Abstrakt: |
Formulation of nutritionally complete and cost efficient diets for yellow perch ( P erca flavescens) is a prerequisite for successful intensive culture of this species. One of the objectives of this study was to determine the optimum diet for the grow-out phase of juvenile yellow perch. Fish at the size of 12.9 ± 4 g were individually marked with passive integrated transponders ( PIT)-tags and randomly distributed into six 400 L tanks, 45 fish per tank. This experiment included lysine-deficient [(−) Lys] and lysine-supplemented [(+) Lys] wheat-gluten-based diets in triplicate groups. Our experiment showed that the mean weight of fish fed (+) Lys diet (83.9 ± 1.5 g) was significantly larger than fish fed (−) Lys diet (68.6 ± 5.2 g) ( P < 0.05). This experiment also showed that the blood plasma concentration of free lysine in (+) Lys group was significantly higher than in (−) Lys group ( P < 0.05) and the same trend appeared also in methionine concentrations. The concentration of Lys in deficient group of fish, 3 h after a meal was lower compared with levels of Lys 24 h post-feeding ( P < 0.05). Lysine deficiency in diet resulted in significantly higher level of serine, and a similar trend occurred in small and large fish. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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