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Articles by Y.A.E. Kouame
Total Records ( 2 ) for Y.A.E. Kouame
  D. Nideou , O. N`nanle , Y.A.E. Kouame , C. Chrysostome , M. Gbeassor , E. Decuypere and K. Tona
  Background and Objective: High incubation temperatures accelerate embryonic growth or increase embryonic mortality depending on incubation stage, duration of exposure. The purpose of this study was to evaluate the influence of high incubation temperature on layer chicken embryo. Materials and Methods: A total of 1200 hatching eggs were studied in two different experiments and divided into two groups, control and high temperature group. Eggs of control group were incubated at standard incubation temperature of 37.6°C. Eggs of high temperature groups were incubated at 38.6°C during the first 10 days for experiment 1 or 18 days for experiment 2. During incubation samples of eggs were used to determine the weights of remaining albumen, embryo and yolk sac. Also, hatching events and hatch were monitored every two hours between 19 and 21 day of incubation. Blood samples were collected at 18 day-old embryo, internal pipping stage and at hatch for tri-iodothyronine, thyroxine and corticosterone level determinations. Results: Results suggested that, the embryos incubated at high temperature during the first 10 days used albumen more rapidly with no effect on hatchability. On contrary, embryos incubated at high temperature during the first 18 days reduced significantly albumen utilization after days 13 of incubation with negative effect on hatchability (p<0.05). In addition, high incubation temperature decreased yolk sac weight compared to control groups (p<0.05). In experiment 1, the highest T3 and T4 levels were obtained at internal pipping stage. Conclusion: A temperature increased by 1°C of the standard during the 18 days of incubation is detrimental for embryo development and hatching performance.
  Y.A.E. Kouame and K. Tona

Background and Objective: After hatching, day-old chicks usually have delay in feed access for 48-72 h before they are placed on farms. This study was conducted to evaluate the effect of delayed access to feed on keets post-hatch performance, physiological and intestinal morphometric parameters. Materials and Methods: Four hundred day-old keets were distributed in a completely randomized design consisting of 2 treatments and 4 replicates with 50 birds per replicate. The treatments were: (1) Keets with immediate access to feed and (2) Keets with delay in feed access for 48h. Prior to feed access, the keets were weighed and reared for 11 weeks. Data were collected on feed intake, body weight. Also, blood samples were ollected at week 11 from guinea fowls for determination of triiodothyronine, thyroxine, total cholesterol, triglyceride, glucose and total protein levels. Guinea fowls were later slaughtered and intestinal morphometry were determined. Results: From 3 weeks onward, body weights of guinea fowls with immediate access to feed were higher (p<0.05) than those with delayed access to feed. Also, the weight and length of intestine of birds with immediate access to feed was higher than those with delayed access to feed. Triiodothyronine and thyroxine of guinea fowl with immediate access to feed were higher (p<0.05) than thosewith delayed access to feed. Total cholesterol, total protein and glucose of the birds with delayed access to feed were lower (p<0.05) than those with immediate access to feed. Conclusion: Delay in feed access more than 48h adversely affected growth performance of guinea fowl.

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