International Journal of Fisheries and Aquatic Studies
2021, Vol. 9, Issue 1, Part C
Causal factors of mass mortality of hatchery reared Clarias gariepinus fry during exogenous feeding
Author(s): Anifowose Olayinka Remilekun, Oladosu Gbolahanmi Akinola and Oladele Oludotun Olubusola
Abstract: The study investigated the causal factors associated with mass mortality of hatchery-reared
Clarias gariepinus Burchell 1822 fry during exogenous feeding. A feeding trial and fry re-infection trial were conducted using four different starter diets. The food samples were fed to 480 post-yolk-absorbed fries for 21 days in two replicates. Samples of dead fry were cultured for bacteria using standard methods. The total aerobic and coliform were significantly higher in all food samples, meanwhile, alkaline pH (9.25
±0.34) and low dissolved oxygen (4.5
±1.08) were not significantly different (
P>0.05) in all water tanks. The bacterial pathogens isolated from dead fries were
Aeromonas hydrophila Stainer, 1943 and
Pseudomonas aeruginosa Migula, 1990, whereas significantly higher mortality in experimentally infected fry was observed (α < 0.05).
Mass mortality of C.gariepinus fry observed in this study was associated with bacterial pathogens, bacterial contamination of food, alkaline pH, and low dissolved oxygen.
DOI: 10.22271/fish.2021.v9.i1c.2409Pages: 235-239 | 1038 Views 258 DownloadsDownload Full Article: Click Here
How to cite this article:
Anifowose Olayinka Remilekun, Oladosu Gbolahanmi Akinola, Oladele Oludotun Olubusola.
Causal factors of mass mortality of hatchery reared Clarias gariepinus fry during exogenous feeding. Int J Fish Aquat Stud 2021;9(1):235-239. DOI:
https://doi.org/10.22271/fish.2021.v9.i1c.2409
