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Articles by Boua Celestin Atse
Total Records ( 2 ) for Boua Celestin Atse
  Boua Celestin Atse , Ahou Rachel Koumi and Patrice Kouame
  A feeding trial was carried out in concrete tank to examine complete and partial replacement of the fish protein with soya protein in practical feeds of African catfish Heterobranchus longifilis. Three diets containing 35% crude protein replacing 0% (FD), 50% (MD) and 100% (SD) of the fish protein with similarpercentage of soya protein were formulated. Soya protein diets were supplementing with 0.5% of methionine and lysine. After 4 months of feedings at 5% body weight, the best growth was achieved with fish fed FD. Growth parameters such as Final Body Weight (FBW), Body Weight Gain (BWG) and Specific Growth Rate (SGR) decreased with the increase dietary soya protein. Similarly, the feed and protein utilization parameters decreased significantly with increasing soya protein substitution in diet. The highest number of the extreme fish size was obtained with the fish fed MD. Cannibalism was observed during the first two months of experiment and was higher in fish fed SD. Fish fed MD showed higher values of carcass lipid content while higher values of carcass ash content were obtained with fish fed SD.
  Koffi Pangni , Boua Celestin Atse and N’Guessan Joel Kouassi
  The influence of female age and size on reproductive success and egg quality was investigated in Chrysichthys nigrodigitatus. Three confined groups were formed following fish age and size during spawning period. The results show that spawning rate increased with female age and size. Spawning rate was similar in 3+ and 4+ females (80 %). But only 50% of 2+ females have spawned. Absolute fecundity of C. nigrodigitatus was higher in 4+ females (9877±386) than in 2+ ones (6939±1024). The 3+ females had an intermediate absolute fecundity (8378±797). Nevertheless, relative fecundity decrease when the age of females increase. Moreover, egg size is positively strength correlated with female age. The 4+ females with a larger body size have produced large size eggs and larvae. Similarly, the hatching rate was higher in 4+ females intermediate in 3+ females and lower in the 2+ ones.
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