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Reproductive activity of the heat stressed rabbit bucks and its improvement using vitamin E and selenium under subtropical Egyptian condition [electronic resource].

By:

Zeidan, A. E. B

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Language: English Summary language: Arabic Description: p.360-381Other title:

النشاط التناسلى فى ذكور الأرانب المعرضة للإجهاد الحرارى وتحسين أدائها باستخدام فيتامين E والسيلينيوم تحت الظروف الشبه الاستوائية المصرية.‪ [Added title page title]

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Assiut veterinary medical journal, 2006 v. 52 (108) [electronic resource].

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In: Assiut Veterinary Medical Journal 2006.v.52(108)Summary: Forty bucks and fifty one New-Zealand White rabbit (NZW) does were used. In the summer, heat- stressed rabbit bucks were divided into four groups (l0 each). The first group was kept as control. The second, third and. fourth groups (treated), were injected intramuscularly with vitamin E (100 IU/ head), selenium (0.1mg/ Kg body weight) or selenium plus vitamin E weakly at the same dose of the previous groups, respectively. Body thermoregulation, testicular measurements, libido, physical and chemical semen characteristics, fertility rate and histological status of the testis of the swnmer heat- stressed rabbit bucks in the control and treated groups, were recorded. The results showed that, rectal temperature was significantly (P<0.05) lower, while skin temperature and ear lobe temperature were insignificantly lower of the summer heatstressed NZW rabbit bucks injected with Vit. E or Se alone and Vit. E plus Se than the control group, whereas respiration rate was significantly (P<0.05) lower with the bucks injected by Vit. E plus Se only. Libido, semen-ejaculate volume, percentage of sperm motility, sperm-cell concentration and total-sperm output were significantly (P<0.05) better, while the percentages of dead spermatozoa, sperm abnormalities and acrosomal damage of spermatozoa were significantly (P<0.05) lower of the summer heat-stressed NZW rabbit bucks injected with Vit. E or Se alone and Vit. E plus Se than the control group. Seminal pH was insignificantly lower, while initial fructose concentration was significantly (P<0.05) higher of the summer heat-stressed NZW rabbit bucks semen injected with Vito E or Se alone and Vito E plus Se than the control group. Seminal sodium concentration was significantly (P<0.05) lower, while calcium, potassium and total phosphorus concentrations were significantly (P<0.05) higher of the summer heat-stressed NZW rabbit bucks injected with Vit. E or Se alone and Vito E plus Se than the control group. Testis weight (gm), epididymis weight (gm), accessory glands weight (gm), testicular volume (cm³) testis tone firmer score and scrotal circumference (em) were significantly (P<0.05) improved of the summer heat-stressed NZW rabbit bucks injected with Vito E or Se alone and Vito E plus Se than the control group. Histological status of the testes of the summer heat- stressed NZW rabbit bucks injected with Vito E or Se alone and Vito E plus Se were improved as compared to the control group. Fertility rate of NZW rabbit does mated with the summer heat-stressed bucks injected with Vit. E plus Se was significantly (P<0.05) higher (60.87%) than the control group (42.86%).

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Forty bucks and fifty one New-Zealand White rabbit (NZW) does were used. In the summer, heat- stressed rabbit bucks were divided into four groups (l0 each). The first group was kept as control. The second, third and. fourth groups (treated), were injected intramuscularly with vitamin E (100 IU/ head), selenium (0.1mg/ Kg body weight) or selenium plus vitamin E weakly at the same dose of the previous groups, respectively. Body thermoregulation, testicular measurements, libido, physical and chemical semen characteristics, fertility rate and histological status of the testis of the swnmer heat- stressed rabbit bucks in the control and treated groups, were recorded. The results showed that, rectal temperature was significantly (P<0.05) lower, while skin temperature and ear lobe temperature were insignificantly lower of the summer heatstressed NZW rabbit bucks injected with Vit. E or Se alone and Vit. E plus Se than the control group, whereas respiration rate was significantly (P<0.05) lower with the bucks injected by Vit. E plus Se only. Libido, semen-ejaculate volume, percentage of sperm motility, sperm-cell concentration and total-sperm output were significantly (P<0.05) better, while the percentages of dead spermatozoa, sperm abnormalities and acrosomal damage of spermatozoa were significantly (P<0.05) lower of the summer heat-stressed NZW rabbit bucks injected with Vit. E or Se alone and Vit. E plus Se than the control group. Seminal pH was insignificantly lower, while initial fructose concentration was significantly (P<0.05) higher of the summer heat-stressed NZW rabbit bucks semen injected with Vito E or Se alone and Vito E plus Se than the control group. Seminal sodium concentration was significantly (P<0.05) lower, while calcium, potassium and total phosphorus concentrations were significantly (P<0.05) higher of the summer heat-stressed NZW rabbit bucks injected with Vit. E or Se alone and Vito E plus Se than the control group. Testis weight (gm), epididymis weight (gm), accessory glands weight (gm), testicular volume (cm³) testis tone firmer score and scrotal circumference (em) were significantly (P<0.05) improved of the summer heat-stressed NZW rabbit bucks injected with Vito E or Se alone and Vito E plus Se than the control group. Histological status of the testes of the summer heat- stressed NZW rabbit bucks injected with Vito E or Se alone and Vito E plus Se were improved as compared to the control group. Fertility rate of NZW rabbit does mated with the summer heat-stressed bucks injected with Vit. E plus Se was significantly (P<0.05) higher (60.87%) than the control group (42.86%).

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