Growth and utilization of energy, protein and amino acids in snakehead Channa striata at different feeding rates exposed to temperature and salinity
25/05/23 08:59AM
Tu, Tran L C; Lan, Tran T P; Phu, Tran M; Hien, Tran T T. Aquaculture, Aquarium, Conservation & Legislation; Cluj-Napoca Vol. 15, Iss. 2, (Apr 2022): 900-911.
Abstract: We compared the effects of two sets of growth conditions,
high temperature (34°C) plus high salinity (9%o) [treatment 34°C-9%o], and an
ambient temperature of 28°C plus freshwater (0%o) [treatment 28°C-0%o] on
survival, growth and the utilization of energy, protein and amino acids in
snakehead, Channa striata at feeding rates of 0 (fasting), 25%, 50%, 75%, 85%
and 100% (apparent satiation) for 26 days. Fingerlings of uniform weight (7-8
g) were acclimated to the water conditions for seven days before being assigned
randomly to 250L composite tanks with the designed temperature and salinity, at
a density of 30 fingerlings per tank. Fingerlings were fed commercial feed
formulated for snakehead. Fingerling weight, and content in the fish body of
crude fat, crude protein and amino acids were measured at the start and at the
end of the feeding experiment. Snakehead fingerlings cultured at 28°C-0%o had
higher final weight, greater weight gain, better survival, and higher feed
intake, and a lower feed conversion ratio than fingerlings cultured at
34°C-9%o. Fingerlings cultured at 28°C-0%o had significantly higher amino acid
digestibility coefficients and maintenance requirements for energy, protein,
and amino acids than those at 34°C-9%o, but conversely, utilization rates were
lower at 28°C-0% than at 34°C-9%o. For typical ambient conditions of 28°C-0%o,
maintenance requirements and utilization rate were, respectively, 44.8
KJ-kg-0,82 day-1 and 0.49 for energy, 0.44 g-kg-0,76 day-1 and 0.58 for
protein, and from 0.014 to 0.050 g-kg-0.76 day-1 and 0.41 to 0.64 for essential
amino acids. These results imply that snakehead cultured at a combination of
high temperature and high salinity requires high levels of dietary energy and
protein to satisfy their maintenance requirements.
(Source: https://www.proquest.com/scholarly-journals/growth-utilization-energy-protein-amino-acids/docview/2670460924/se-2?accountid=28030)
