Effect of vitamin C supplementation on the survival rate and histopathological changes of gills and kidneys of tilapia (Oreochromis niloticus) infected by Aeromonas hydrophylla

Feed additive survival rate bacterial disease Aeromonas hydrophila vitamin C

Authors

  • Dewa Ayu Angga Pebriani Study Program of Water Resources Management, Faculty of Marine and Fisheries, Udayana University, Bukit Jimbaran 80361, Kabupaten Badung, Provinsi Bali, Indonesia, Indonesia
  • I Ketut Wija Negara Study Program of Water Resources Management, Faculty of Marine and Fisheries, Udayana University, Bukit Jimbaran 80361, Kabupaten Badung, Provinsi Bali, Indonesia, Indonesia
  • Ni Putu Putri Wijayanti Study Program of Water Resources Management, Faculty of Marine and Fisheries, Udayana University, Bukit Jimbaran 80361, Kabupaten Badung, Provinsi Bali, Indonesia, Indonesia
  • Putu Eka Sudaryatma
    putueka.sudaryatma@gmail.com
    Fish Quarantine and Inspection Agency (FQIA) Regional Office Denpasar, Ministry of Marine Affairs and Fisheries of Indonesia, 80361, Kabupaten Badung, Provinsi Bali, Indonesia, Indonesia https://orcid.org/0000-0002-4186-0539
  • Putu Angga Wiradana Study Program of Biology, Faculty of Health, Science and Technology, Universitas Dhyana Pura, Jl. Raya Padangluwih, Dalung, North Kuta 80351, Kabupaten Badung, Provinsi Bali, Indonesia, Indonesia https://orcid.org/0000-0002-0139-8781

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This study was conducted to determine the effect of vitamin C supplementation on the survival rate and histopathological changes of gills and kidneys of tilapia infected by Aeromonas hydrophila. Three doses of vitamin C were tested (150; 300; and 450 mg/kg) with two control groups. Tilapia with uniform size (average weight of 14 grams) as the criteria for inclusion were randomly distributed in five ponds with 15 tilapia fish per ponds. Tilapia was fed with hands until full for two weeks. Tilapia was then infected with A. hydrophila to find out the survival rate and histopathological changes of gills and kidneys at the end of the experimental period or 7 days after infection. The supplementation of 150 mg/kg vitamin C in feed increased the survival rate (%) in Tilapia by 86.67% or higher than other treatment and control groups. The damage to gills in terms of lamella separation was found in all treatment groups, as well as kidneys. The results found that the supplementation of 150 mg/kg vitamin C in feed increased survival rate but did not give effective protection on gills and kidneys.