Effects of dietary tryptophan on cannibalism, survival and growth of Wallago attu (Bloch & Schneider, 1801) juveniles
Vol. 131 No. 1D (2022), Original Article
Vol. 131 No. 1D (2022)

Effects of dietary tryptophan on cannibalism, survival and growth of Wallago attu (Bloch & Schneider, 1801) juveniles

Original Article
https://doi.org/10.26459/hueunijns.v131i1D.6516
Published 2022-12-31
Vo Duc Nghia
University of Agriculture and Forestry, Hue University, 102 Phung Hung St., Hue, Vietnam
Le Tien Huu
University of Agriculture and Forestry, Hue University, 102 Phung Hung St., Hue, Vietnam
Le Thi Thu An
University of Agriculture and Forestry, Hue University, 102 Phung Hung St., Hue, Vietnam
Nguyen Van Huy*
University of Agriculture and Forestry, Hue University, 102 Phung Hung St., Hue, Vietnam
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Keywords

cannibalism
growth
l-tryptophan
serotonin (5-HT)
survival rate
Wallago attu

How to Cite

1.
Vo DN, Le TH, Le TTA, Nguyen VH. Effects of dietary tryptophan on cannibalism, survival and growth of Wallago attu (Bloch & Schneider, 1801) juveniles. hueuni-jns [Internet]. 2022Dec.31 [cited 2024Nov.24];131(1D):67-75. Available from: https://jos.hueuni.edu.vn/index.php/hujos-ns/article/view/6516
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Abstract

This study aims to evaluate the effects of supplemented commercial diets with tryptophan (TRP) on plasma serotonin, cannibalism, survival rate, and growth of Wallago attu (helicopter catfish). After one week of acclimation, 3,200 juveniles of helicopter catfish (BW = 2.5 ± 0.27 g, total length = 5.6 ± 0.43 cm) were randomly assigned for the experiment in fifteen plastic tanks (200 L). The experiment was conducted with five treatments (CT – 0 g TRP/kg – control group, T1 – 5 g TRP/kg, T2 – 10 g TRP/kg, T3 – 20 g TRP/kg, and T4 – 40 g TRP/kg) in a completely randomized design with three replications for four weeks. The results from the enzyme-linked immunosorbent assay reveal that TRP-supplemented diets effectively increased the serotonin level (5-HT) in the plasma of the catfish. The serotonin level increased with the dose of TRP added to the feed. Furthermore, a higher TRP level significantly decreased cannibalism and improved the final survival of the fish. However, the fish’s growth rate among treatments T1, T2, T3, and T4 was not significantly different, but there was a statistical difference between the experimental treatments and the CT treatment. The findings of this study suggest that TRP could be supplemented at a dose of 20 g·kg–1 to the feed to reduce cannibalism and improve the final survival of helicopter catfish.

https://doi.org/10.26459/hueunijns.v131i1D.6516
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