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Effect of Dietary Supplementation with Durio zibethinus Murr. cv. Monthong Rind on the Hematology and Innate Immune Response Against Aeromonas hydrophila in Red Tilapia (Oreochromis niloticus x Oreochromis mossambicus)
(2025-01-01)
Pisuttharachai, Duangjai
;
Sangkhonkhet, Nataporn
;
Nalinanon, Warrapong
;
Lerdsuwan, Saichon
In vivo activity study of durian rind (Durio zibethinus Murr. cv. Monthong) as a supplement in the tilapia diet was performed to evaluate its effect on the hematology and innate immune response against Aeromonas hydrophila. Red Tilapia (Oreochromis niloticus x Oreochromis mossambicus), with an initial average weight range of 40-45 g, were fed diets supplemented with durian rind at 0, 10, 15, and 20% for 140 days and were injected intraperitoneally with A. hydrophila. Blood was collected at 1 and 3 hours post-injection to determine the phagocytic activity and the durian rind efficiency in protecting fish red blood cells from hemolysin produced by A. hydrophila. Ensuing results showed that red blood cell counts in fish-fed durian rind supplemented diets, regardless of inclusion levels, did not decrease at 3 hours post bacterial infection and were significantly higher than control (P<0.05). Furthermore, we observed that the total white blood cells and phagocytic activity of all fish fed with diets supplemented with durian rind increased from 1-hour post-infection, indicating a heightened innate immune response. Taken together, durian rind supplementation of at least 10% in the tilapia diet can act as an immunostimulant and improve innate immune response and anti-hemolytic activity against A. hydrophila infection.
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Effect of Durio zibethinus Murr. cv. Monthong Rind as a Dietary Ingredient in Feed on the Growth Performance and Disease Resistance Against Aeromonas hydrophila in Red Tilapia (Oreochromis niloticus x Oreochromis mossambicus)
(2023-04-01)
Sangkhonkhet, Nataporn
;
Phanchindawan, Naree
;
Lerdsuwan, Saichon
;
Nalinanon, Warrapong
;
Pisuttharachai, Duangjai
Monthong durian is a durian species mainly cultivated in Thailand. The rind makes up about 60-75% of whole fruit and is often discarded. Here, we evaluated the effect of durian rind, specifically the inner white peel, as a supplement for a fish diet on the growth performance and disease resistance against Aeromonas hydrophila in Red Tilapia. Fish with an initial average weight of 42.68 ± 0.11 g were fed diets supplemented with durian rind at 0, 10, 15, and 20% for 140 days. Subsequent results showed that growth performance in terms of weight gain, average daily gain, length gain, and specific growth rates were not significant among treatments (P > 0.05). In addition, the feed conversion ratio and survival rate of fish fed with diets supplemented with durian rind were also not significantly different from the control (P > 0.05). After the 140-day feeding trial, fish were injected intraperitoneally with A. hydrophila, and the cumulative mortality was recorded for 14 days. The survival rate of fish-fed durian rind-supplemented diets at all levels was higher than that of the control. The highest survival rate and relative survival percentage were fish fed with 10% and 15% durian rind in the diet. Taken together, the white peel of the durian rind can be a potential fish feedstuff and can act as a natural antibiotic to improve fish resistance against A. hydrophila. Recommended level of durian rind supplementation is 10%-15% in the diet which will not affect growth but can enhance disease resistance to A. hydrophila.

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