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Impacts of pineapple peel powder on growth performance, innate immunity, disease resistance, and relative immune gene expression of Nile tilapia, Oreochromis niloticus
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Advisor(s)
Abstract(s)
An 8-week growth trial was conducted to examine the efficacy of pineapple peel powder (PAPP) on growth rate
and immunity of Nile tilapia, O. niloticus. Three hundred Nile tilapia (20.91 ± 0.11 g) were fed five diets containing different levels of PAPP at 0, 10, 20, 30 and 40 g kg− 1 PAPP, respectively. After four and eight weeks of
the feeding trial, growth rates, and immune responses were tested. A challenge test using Streptococcus agalactiae
and relative immune gene expression were performed after eight weeks of PAPP feeding. It was found that skin
mucus and serum lysozyme, skin mucus and serum peroxidase, alternative complement, phagocytosis, and
respiratory burst activities were significantly increased with the addition of PAPP. The maximum (P ≤ 0.05)
innate immune values were noted in fish fed 10 g kg− 1 PAPP. Similarly, the up-regulation of IL1, IL8, and LBP
gene expressions were also detected in fish fed PAPP diets, with the maximum value was found in 10 g kg− 1 PAPP
fed fish. The relative percentage of survival (RPS) of Oreochromis niloticus after the challenge test were (56.00%,
72.00%, 60.00%, and 44.00%) for the 5, 10, 20 and 40 g kg− 1 PAPP diets, respectively. Fish fed the 10 g kg− 1
PAPP supplemented diet achieved the highest (P < 0.05) survival rate against S. agalactiae. Growth and feed
efficiency were outstandingly (P < 0.05) enhanced in the PAPP groups. In conclusion, PAPP can be potentially
used as a feed additive in Nile tilapia culture under Biofloc system.
Description
Keywords
Pineapple peels Biofloc Nile tilapia Mucosal immune Gene expression
Citation
Publisher
Elsevier