The aim of this work was to determine the effect of the root-bark extract of Securidaca longepedunculata in the improvement of fertility in buck rabbits as envisioned by morphometric indices of the testes. Testicular morphometry of New Zealand rabbits was studied following treatment with different doses of the extract. The extract was administered per os in three doses of 0, 50 and 100 mg/kg body weight to three treatment groups of rabbits A, B, and C respectively for 29 days in a completely randomized designed (CRD). Eighteen mature buck rabbits between the ages of 18 and 24 months and with initial body weight (1.1 to 1.9 kg) were used. Each group comprised of three rabbits replicated twice. After the period of treatment, rabbits were weighed and sacrificed. Mean absolute paired testes weight, testes length and testes width were obtained and expressed relative to body weight at sacrifice. The results showed a significant difference in the mean relative paired testes weight, testes length and testes width between groups (p<0.05). The treated group given 50 mg/kg body weight of the extract had the highest mean absolute and relative paired testes weight of 3.325 ± 0.1349 a g and 0.2098 ± 0.0139 a % with mean absolute and relative testes length of 2.4522 ± 0.0250 a cm and 0.1538 ± 0.0040 a %. While the group given 100 mg/kg body weight of the extract had the lowest values of 2.634 ± 0.2762 b g and 0.1565 ± 0.0124 b % with mean absolute and relative paired testes length of 2.1600 ± 0.0807 b cm and 0.1299 ± 0.0039 b % respectively. It was concluded that administration of the extract at 50 mg/kg body weight yielded higher testicular parameters of buck rabbits. It was recommended that the use of the extract in bucks should be done with caution in relation to dose and length of treatment and that a detailed research should be carried out to evaluate the semen quality of bucks treated with 50 mg/kg the extract.
This work was aimed to assess the semen characteristics of Yankasa rams following Cypermethrin treatment.Cypermethrin was used topically at the dose rate of 3mg/kg b.w (0.1ml/kg). Sixteen healthy Yankasa rams and weighing between 21.5kg and 43kg and between the ages of 18 and 30 months were used. The animals were divided into groups A and B. Group A was given 3% Cypermethrin as pour-on fortnightly for a period of twelve weeks. Group B was given distilled water at the same rate (0.1ml/kg), route of administration and period. Semen samples were collected weekly by the use of a battery powered hand held electro ejaculator. Results showed that Cypermethrin significantly reduced mean sperm concentration, motility, viability, semen volume and pH of Yankasa rams. The difference between the mean sperm motility of groups A and B in weeks 6, 7 and 8 were statistically significant (P<0.05). The values were 37.78 ± 5.21% and 82.11 ± 9.12%, 22.86 ± 4.10% and 73.42 ± 8.07%, 32.14 ± 10.17 and 67.86 ± 9.31% for groups A and B respectively. Semen volume was significantly higher in control rams at week 2 (P<0.05). The values were 0.36 ± 0.04ml and 0.93 ± 0.26 mlfor groups A and B respectively. The difference between the mean sperm concentration of groups A and B were statistically significant in weeks 5 and 7 (P<0.05). The mean sperm concentrations of groups A and B were3190 ± 499.76 x 10 6 /ml and 4558 ± 558.10 x 10 6 /ml, 1931 ± 102.57 x 10 6 /ml and 3300 ± 309.15 x 10 6 /ml for weeks 5 and 7 respectively. The difference between the mean percentage live of groups A and B were statistically significant in weeks 6, 7 and 8 (P<0.05). The values were 45.55 ± 4.75% and 82.22 ± 7.78% in week 6, 48.57 ± 5.95% and 84.29 ± 3.69% in week 7, 47.14 ± 9.44 and 74.29 ± 3.69% in week 8 for groups A and B respectively. By week 12 of the experiment, the mean semen pH values 6.60 ± 0.10 and 8.00 ± 0.09 for groups A and B respectively were significantly different (P<0.05).It was concluded that Cypermethrin lowers semen quality of Yankasa rams. It was therefore, recommended that Cypermethrin be used with caution inrams and further studies on the meat residue be done for public health concern.
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