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Apr 30, 2022Keywords:
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Effects of Diluents on Cock Spermatozoa Motility, Viability, Fertility and Hatchability
Abstract
The study evaluated the effects of coconut water + egg yolk (CW- EY), egg yolk citrate (EYC) and skimmed milk (SM) diluents on spermatozoa motility, viability, egg fertility and hatchability in chicken. A total of 84 mature birds (48 hens and 36 cocks) randomly distributed to 4 treatments (T1 –T4) were used. T1 was raw semen, while T2 –T4 were diluted with coconut water + egg yolk, egg yolk citrate, and skimmed milk respectively. The birds were fed a 16.5 CP and 2.60 energy layers’ diet. The cocks were evaluated for the basic semen quality indices prior to the experiment. Raw semen samples were then diluted with each diluent and subjected to microscopic examination for individual progressive motility and viability every 10 minutes for 60 minutes. Semen samples were pooled from 3 cocks in each treatment and diluted in the ratio of 1:3. Aliquots - 0.1ml raw semen (T1) and 0.25ml diluted semen (T2 = T4) were drawn and deposited into the reproductive tract of the hen. 240 eggs were incubated and candled. The result showed significant (P < 0.05) effects of diluents on spermatozoa individual motility. T2 and T3 were statistically not significant (P > 0.05), and were comparable with T1. T4 had the least (70.75) PSM value at 20 – 60min post dilution. Percentage fertility (PF) was significantly (P < 0.05) affected by diluent. T1 and T2 had higher (95.37 and 94.80) PF than T3 and T4. The number of infertile eggs (NI) was significantly (P < 0.05) affected by diluent. T3 and T4 had higher (14.33 and 18.33) NI than T1 and T2. The number of dead embryos was not affected by diluent (P >0.05). Percentage hatchability (PH) was significantly (P < 0.05) affected by diluent. T2 had the highest PH (97.59) than T3 (94.49) and T4 (90.24).T1 had the least (98. 89) PH result. The result indicated significant (P < 0.05) effect of diluent on the percentage viable spermatozoa (PV). PV was higher in T1 (99.00 and 98.00) than T2 (97.75 and 96.50) and T3 (97.50 and 95.25) and lowest in T4 (77.75). T2 and T3 compared favorably with T1 and least (77.75) in T4 from 20 – 60minutes post dilution.
