Authors : Awotongha J. Gbulubo, Uwgemorabong U. Gabriel and Francis O. Nwadukwe
Abstract: About 100% mortality was recorded in hybrid catfish fingerlings that were exposed to 10 and 12 ppt at the 3rd and 12th h, respectively. Those in 6 and 8 ppt had 90 and 25% survival, respectively at the end of 96 h. Median Lethal Salinity (MLS96) for 10 ppt was 5.55 h. The cumulative mortality at the various salinity concentrations did not differ in 4 and 6 ppt but differed in 8, 10 and 12 not differ from 12-48 h and between 72 and 96 h (p>0.05). Water temperature values ranged from 26.0°C, dissolved oxygen ranged from 5.2 mg c-1 to 6.8 mg L-1 while pH ranged from 5.2-6.6.
Awotongha J. Gbulubo, Uwgemorabong U. Gabriel and Francis O. Nwadukwe, 2011. Mortality of Hybrid Catfish (Clarias gariepinus x Heterobranchus bidorsalis) Fingerlings at Varying Salinity Levels. Journal of Fisheries International, 6: 71-74.