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The effect of photoperiod on the growth and survival rate of African
catfish, Clarias gariepinus juvenile
Ummi Syafizah Binti Mohd Radzi
Supervisor: Prof Dato’ Dr Anuar Bin Hassan
Bachelor of Science in Agrotechnology (Aquaculture)
School of Fisheries and Aquaculture Sciences
The study was conducted to determine the effects of different photoperiods on the
growth and survival rate of the African catfish, Clarias gariepinus juveniles. Thirty
juveniles, were reared in triplicate under four different photoperiods: 24 hour total
darkness (24D: 0L); 24 hour total light (24L: 0D); 16 hour darkness: 8 hour light (16D:
8L) and 12 hour darkness: 12 hour light (12D:12L) as control. The result showed that
there were significant (P < 0.05) increased in body weight, total length, specific
growth rate and survival rate in juveniles cultured under (24D: 0L) followed by (12L:
12D) and followed by (16L: 8D). While for (24L: 0D) showed the least growth
increased. (24D: 0L) showed the highest growth rate (20.728 ± 0.799 a , body weight
gain, 0.619 ± 0.079 a , total length gain) while (24L: 0D) (5.276 ± 0.228 c , body weight
gain, 0.241 ± 0.044 c , total length gain) showed the lowest growth rate. For (24D: 0L)
showed the highest survival rate 72.222 ± 10.184 a , while (24L: 0D) showed the
lowest survival rate 25.556 ± 15.031 c .
540 | UMT UNDERGRADUATE RESEARCH DAY 2018