Reproductive capabilities of Californian Rabbits as affected by Gn- RH injection or supplementation to semen
Abstract: Thirty bucks and sixty does of Californian rabbits (12 months age ) were used in two experiments. Experiment 1 planned to investigate the effect of injecting Californian rabbit bucks with 0.75 g Gn- RH/Kg body weight in different sites; intramuscularly, subcutaneously, intratesticularly or intravenously on libido and physical semen characteristics. Fertility traits of rabbit does (represented by kindling rate and litter size and weight at birth ) mated naturally using Gn- RH injected bucks in different sites were estimated. In experiment 2, from untreated bucks, semen was collected artificially, pooled and extended with lactose – yolk citrate extender. Gn – RH was added to the extended semen at levels 0, 50, 100, g/ml than the extended semen was stored at refrigeration temperature (4-6°C) up to 3 days, room temperature (18-22°C) up to 3 hours or incubation at 37°C up to 4.5 hours. Semen quality was recorded at the different stages of preservation. Twenty Californian rabbit does were inseminated artificially using semen collected from untreated bucks and supplemented with saline solution
( control) or 150 g Gn- RH/ml to estimate kindling rate and litter size and weight at birth.
The results obtained from this work showed that, libido and physical semen characteristics of rabbit bucks injected intramuscularly or subcutaneously with Gn- RH were significantly (P<0.05) better than those of bucks injected intratesticularly or intravenously with the same treatment as assessed by fertility traits of rabbit does naturally mated. Supplementing 150 g Gn- RH to the extended rabbit semen improved significantly (P<0.05) its quality and viability, during chilled storage at (4-6C) or preservation at room temperature ( 18-22C) and sperm penetration into cervical mucus, during incubation at 37C. Semen quality was decreased significantly(P<0.05) with progression of time at different preservation temperatures. Kindling rate and litter size and weight at birth values were significantly (P<0.05) better in rabbit does inseminated artificially by using semen supplemented with 150 g Gn- RH/ml than the control.
Keywords: Semen characteristics; Gn- RH; semen preservation, fertility traits.
Publication year 2002
Pages 275-285
Availability location معهد بحوث الانتاج الحيوانى-شارع نادى الصيد- الدقى- الجيزة
Availability number
Organization Name
serial title 3rd Science Conference On Rabbit production in Hot Climates
Author(s) from ARC
External authors (outside ARC)
    احمد حسن دعادر جامعة الزقازيق
    حسن على جبر جامعة الزقازيق
Agris Categories Animal physiology - Reproduction
AGROVOC
TERMS		 Fertility. Litter size. Mate. Rabbits. Semen preservation. Weight.
Proposed Agrovoc Gn- RH;Semen characteristics;kindling rate;Semen quality;
Publication Type Conference/Workshop
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