RESPONSE TO SELECTION FOR BODY WEIGHT IN THE THIRD GENERATION OF MASS SELECTION OF THE AFRICAN CATFISH (Clarias gariepinus) AT RESEARCH INSTITUTE FOR FISH BREEDING SUKAMANDI
Abstract: Genetic improvement
of the African catfish (Clarias gariepinus) in Indonesia for increasing growth
performance has been conducted by Research Institute for Fish Breeding at
Sukamandi through mass selection. Collection and characterizations of the
founder populations, building the synthetic base population, first generation
and second generation through mass selection were conducted during 2010-2013.
Later, in 2014 it was followed by building the third generation. The present
study aimed to find out the genetic gain in the third generation in term of
response to selection for body weight. Fifty-two pairs of the selected (fast
growing) individuals from the second generation were mated to produce the third
generation. As a comparison, five pairs of average-sized individuals were mated
to produce the control population, as a second generation representative.
Larval rearing, nursery and grow-out phases were respectively held for 25 days
in the aquaria, 30 days in the concrete ponds and 60 days in the concrete
ponds. At the end of each phase, individual samplings of body weight were
undertaken. The results showed that mean body weight of the third generation
was higher than that of control population at the end of larval rearing phase
(0.21 ± 0.26 g versus 0.20 ± 0.15 g), nursery phase (6.12 ± 2.93 g versus 5.80
± 3.50 g) and grow-out phase (198.67 ± 82.82 g versus 165.22 ± 71.09 g). Those
results revealed that response to selection for body weight of the third
generation was positive, i.e. about 20.24% (33.45 g).
Keywords: African catfish
(Clarias gariepinus); body weight; mass selection; response to selection; third
generation
Author: Bambang Iswanto,
Imron, Huria Marnis, Rommy Suprapto
Journal Code: jpperikanangg160043
