World Rabbit Science - Vol. 08 (4)-2000
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- DAM AND LITTER INBREEDING AND ENVIRONMENTAL EFFECTS ON LITTER PERFORMANCE IN BOTUCATU RABBITS
- HISTOCHEMICAL DISTRIBUTION OF LEUCINE AMINOPEPTIDASE (LAP-ase)IN THE YOUNG RABBIT INTESTINE
- HISTOCHEMICAL STUDY OF NON-SPECIFIC ESTERASE ACTIVITY IN SMALL AND LARGE INTESTINE OF YOUNG RABBIT
- PROENOFOS EFFECTS ON RABBIT PERFORMANCE AND THEIR AMELIORATION BY USING NATURAL CLAY MINERALS
- Note: An original system to separately control litter and female feed intake without modification of the mother-young relations
- EFFECT OF LYSINE AND METHIONINE ON LIBIDO AND SEMEN CHARACTERISTICS OF BUCKS
- VITAMINS IN RABBIT NUTRITION : LITERATURE REVIEW AND RECOMMENDATIONS
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- PublicationVITAMINS IN RABBIT NUTRITION : LITERATURE REVIEW AND RECOMMENDATIONS(World Rabbit Science. ICTA. UPV, 2000) Lebas, F.[EN] Vitamins are classified in a total of 13 substances or groups of substances. Four vitamins are fat-soluble (vitamin A, O E, and K) and the nine others (vitamins of the B-complex and vitamin C) are water-soluble. The water-soluble vitamins and vitamin K are normally synthesised by the rabbit's digestive flora; but in cases of high risk of digestive disorders (e.g. just after weaning), dietary supplementation may be advisable. In addition, a vitamin C supplementation (25 to 30 mg per rabbit and per day) can help the animal in stress situations (heat stress, ... ). The vitamin A requirement is largely satisfied if the diet contains 1 O 000 1 U vitamin A per kg or 30 ppm of J3-carotene. Additional provision of vitamin A is unnecessary far growing rabbits and may be toxic to the foetus in pregnant does. The dietary recommended vitamin O level is 800 to 1000 IU/kg. lf the dietary concentration is greater than 2000 IU/kg, abnormal calcification of soft tissues (aorta, kidneys, ... ) is generally observed. The recommendation for vitamin E is 50 mg/kg. A diet that contains only 15 mg/kg of vitamin E induces deficiency symptoms (muscular dystrophy, sudden death, reproduction disorders, ... ). A massive introduction of vitamin E is not toxic but may improve rabbit meat shelf-life, by reduction of the rate of lipid oxidation
- PublicationNote: An original system to separately control litter and female feed intake without modification of the mother-young relations(World Rabbit Science. ICTA. UPV, 2000) Fortun-Lamothe, L.; Gidenne, T.; Lapanous, A.; De Dapper, J.[EN] This paper describes an original system allowing separate control of the feed intake of the mother and of her litter without rearing them in separate cages, and thus without modifying young I mother relations. This system involved severa! modifications on traditional wire cages. Firstly, !he female's feeder was modified to preven! the ingestion of pellets by the suckling rabbits. Secondly, young had access to a specific feeder. Lastly, a wire mesh partition divided the cage in two areas, to avoid !he doe having access to !he young's feeder. Females need to be adapted to their new feeder at leas! two weeks befare the beginning of the control of feed intake. About 10% of !he females did not adapt to this system while the others recovered their initial feed intake within one week. Neither the milk intake nor !he growth of the suckling rabbits were modified by this system. Therefore, it allows independen! feeding plans for females and litters.
- PublicationEFFECT OF LYSINE AND METHIONINE ON LIBIDO AND SEMEN CHARACTERISTICS OF BUCKS(World Rabbit Science. ICTA. UPV, 2000) Nizza, A.; Dimeo, C.; Taranto, S.[EN] The aim of this experiment was to study the influence of dietary lysine and methionine levels on the libido and semen quality of bucks. Forty crossbred Hyla HYLA rabbit males (10-12 months old) were subjected to four diets (15% crude protein) differing in lysine and methionine content (diet A 0.64 and 0.58%; diet B 0.75 and 0.58%; diet C 0.64 and 0.65%; diet D 0.75 and 0.65 of lysine and methionine +cystine, respectively). Two successive ejaculates were collected once a week for 12 consecutive months. Semen evaluations of for volume, colour, pH, motility, concentration and percentage of live spermatozoa were performed every two weeks. Dietary supplementation with lysine and methionine affected few parameters and there was little variation in the values. never experienced large oscillations. Diets with higher lysine contents increased live sperm concentration from 77.1 to 78.2% in the second ejaculate and reduced the necessary interval between mating and ejaculation (sec. 20.8 vs 21.3 and 22.6 vs 23.1 for ejaculates 1 and 11, respectively). Supplementation with methionine increased the motility of ejaculate 11 (72.7 vs 71.2%) and reduced libido at the first sampling (sec. 21.4 vs 20.6 sec.). No significan! differences in the reproduction parameters (fertility -75.2% on average-, total born/litter and born alive itter - 7.7 alive on average) were found for does inseminated with the semen of bucks undergoing dietary treatments (100 Al /treatment).
- PublicationPROENOFOS EFFECTS ON RABBIT PERFORMANCE AND THEIR AMELIORATION BY USING NATURAL CLAY MINERALS(World Rabbit Science. ICTA. UPV, 2000) Ayyat, M.S.; Abd el-Monem, U.M.; El-Gendy, H.M.; El-Fateh Hammad, M.[EN] Eighty New Zealand White male rabbits of 35 days of age, were used in the present study. The rabbits were randomly allotted to 8 groups with 10 animals in each. Four groups were fed diets contaminated with O, 0.658, 1.315, 2.630 mg proenofos/kg diet. The other four groups fed the same diets but supplemented with 5% natural clay (80% betonite). Rabbits fed with diet contaminated with proenofos (an organophosphorus insecticide) decreased feed intake, final live body weight (-22% for the highest leve!), daily gain, heamoglobin, serum total protein, albumin, SGPT and cholinesterase while mortality rate, SGOT, urea-N and creatinine increased. Feed conversion impaired with increasing pesticide level in rabbit diets. Proenofos residues in liver (3 to 7 ppm), kidney and muscle (0.4 to 0.7 ppm) significantly (P<0.001) increased with increasing pesticide level in rabbit diets. Proenofos residue in liver and kidney tissues and muscle decreased with 54.8, 50.3 and 40.0%, respectively, with clay supplementation in rabbit diets. Final live body weight, daily gain, serum albumin, and cholinesterase significantly increased by·the clay supplementation in pesticide contaminated diets, while blood urea-N significantly decreased. Heamoglobin, serum total protein, globulin, creatinine, transaminases (SGOT and SGPT) and carcass and noncarcass components were insignificantly affected by the interaction between proenofos contamination and clay addition. Supplemented natural clay in rabbit diets contaminated with proenofos decreased mortality rate (3.3% vs 16.7%; P=0.097) Feed conversion was improved with clay supplementation in contaminated rabbit diets
- PublicationHISTOCHEMICAL DISTRIBUTION OF LEUCINE AMINOPEPTIDASE (LAP-ase)IN THE YOUNG RABBIT INTESTINE(World Rabbit Science. ICTA. UPV, 2000) Sabatakou, O.; Xylouri-Frangiadaki, E.; Paraskevakou, E.[EN] The distribution of leucine aminopeptidase in normal duodenal, jejunal, ileal, crecal and colonic mucosa of the rabbit has been studied using a histochemical method. Thirty New Zealand White rabbits were used ranging from 26-day old foetuses to 43-day old young (3 rabbits per age). Small intestine siles performed a leucine aminopeptidase reaction starting from the 301 h day of foetal life. After birth the reaction was variable in intensity up to 19 days of age, while in older animals it became very strong. Similarly, the large intestine followed the same pattern with the exception that from the 241 h day of age onwards it performed no reaction.