| Titles |
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English :
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Some reproductive; productive and physiological aspects of purebred and crossbred flander and new-zealand white rabbits under egyptian environmental conditions.
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| Abstract |
The present study was carried out by using four hundreds and twenty eight rabbits to investigate reproductivity; productivity and physiological capabilities of Flanders and New-Zealand White rabbits as pure or crossed breeds. This study included two experiments. In the first experiment, two hundreds and ninety two mature rabbits of about eight months age of two breeds (126 multiparous does and 20 mature bucks of each of Flanders "FL" and New-Zealand White "NZW " breeds) were used to estimate reproductive traits of purebred or crossbred FL. and NZW rabbits. The experiment also studied the effects of pure or pooled semen of FL. and NZW rabbit bucks on reproductive traits of FL. and NZW rabbit does using artificial insemination. In the second experiment, a total number of one hundred and thirty six growing rabbits (aged 3 months) of two purebreds (FL. & NZW) and two crossbreds (FL. x NZW & NZW x FL) {17 of each males and females} was used to evaluate body thermoregulation; some nutritional aspects and libido and physical semen characteristics, under Egyptian environmental conditions.
The results obtained revealed that, reproductive traits represented by (conception & kindling rates; litter size at birth & at weaning and bunny weight at birth & at weaning) were arranged descendingly (P≤0.05) as obtained by mating of "Bucks x Does" as: (FL. x NZW; NZW x FL.; FL. x FL. then NZW x NZW), respectively. Inseminating FL. and NZW rabbit does artificially resulted kindling rates and litter size at birth arranged descendingly (P≤0.05) by using pooled semen (FL. + NZW semen); semen from inverse breed (FL. semen for NZW does and NZW semen for FL. does) then semen from the same breed (semen from bucks with the same breeds of rabbit does), respectively.
Respiration and pulse rates and body temperatures represented by (rectal; skin and ear lobe temperatures) of growing rabbits resulted from crossbreds were significantly (P≤0.05) lower than those resulted from purebreds, and also in rabbit males than in rabbit females, in all studied breeds. FL. x NZW crossbreds rabbits were superior (P≤0.05) than NZW x FL. and also FL. purebreds rabbits were superior (P≤0.05) than NZW in body thermoregulation. Daily of each of weight gain and feed intake and feed efficiency values were significantly (P≤0.05) higher due to cross breeding. However, no significant variations observed between the two studied crossbreeds (FL. x NZW and NZW x FL.) or between the two used purebreds (FL. and NZW) in daily weight gain, daily feed intake and feed efficiency.
Libido and physical semen characteristics represented by (semen-ejaculate volume; sperm-cell concentration per ml & per ejaculate; advanced sperm motility; dead & abnormal spermatozoa and acrosomal damages) ejaculated by FL pure rabbit bucks were significantly (P≤0.05) the best followed by semen ejaculated by NZW purebred; FL. x NZW crossbred then NZW x FL. crossbred, respectively.
Key words: rabbits, pure breeding, cross breeding, performance, semen, A.I.
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| Publication year |
2005
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| Availability location |
معهد بحوث الانتاج الحيوانى- شارع نادى الصيد- الدقى - الجيزة
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| Availability number |
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| Organization Name |
Animal Production Research Institute (APRI)
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| Country |
Egypt
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| City |
شرم الشيخ
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| serial title |
Proceeding of the 4th International Conferance on Rabbit Prodroduction in Hot Climate .
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| Department |
Rabbit, Turkey and Water Fowl Research Department
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| Author(s) from ARC |
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| Agris Categories |
Animal physiology - Reproduction
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AGROVOC
TERMS |
Egypt.
Performance testing.
Production.
Rabbits.
Reproduction.
Semen.
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| Publication Type |
Conference/Workshop
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