Banuchi Valentín, Kiara M.

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    Efecto de L-carnitina dietética sobre algunos parámetros repodcutivos en semen de gallos Brown Leghorn
    (2020-05-26) Banuchi Valentín, Kiara M.; Latorre Acevedo, José R.; College of Agricultural Sciences; Arcelay Ruiz, Enid; Sánchez Rodríguez, Héctor L.; Soltero Harrington, Fred V.; Department of Animal Science; Calcagno Pizzarelli, Bárbara O.
    One hundred thirty-day-old male breeders of the Brown Leghorn breed were randomized to diets with 0, 250 and 500 mg/kg of L-carnitine. All birds were fed equal amounts of their respective diet from the first week until the 35th week of age. Birds with 0 mg/kg of L-carnitine served as a control group. At 12 weeks of age, 16 males of each treatment were transferred to wire cages. For each cage there were two roosters, referring to it as an experimental unit. Semen concentration was measured once a week from 24 to 35 weeks of age. Semen was evaluated for sperm concentration and morphology. A semen sample was collected at each experimental unit per week for evaluation. The average body weight was taken over 35 weeks of age at two-week intervals. Testicular and liver weight were analyzed at the end of the investigation. There was no significant difference (P ≤0.5) in the average body weight between the treatments of 0 mg/kg and 250 mg/kg of L-carnitine, 0 mg/kg and 500 mg/kg L-carnitine or between the treatments with 250 mg/kg and 500 mg/kg of L- carnitine. The roosters in the 250 mg/kg treatment had the highest sperm concentration, although, there was no significant difference in the sperm concentration between the treatments of 0 mg/kg and 250 mg/kg of L-carnitine, 0 mg/kg and 500 mg/kg L-carnitine or between treatments with 250 mg/kg and 500 mg/kg of L-carnitine. In contrast, regarding sperm morphology, there was a significant difference between the 0 mg/kg and 250 mg/kg treatments. The roosters in the 250 mg/kg treatment had the highest percentage of normal sperm morphology. On the other hand, there was no significant difference between L-carnitine treatments in relation to liver weight. In conclusion, supplementing 250 mg/kg of L-carnitine in breeding roosters of the Brown Leghorn breed resulted in reproductive improvements in sperm morphology, that is, more viable sperm and increased testicular weight.