World Rabbit Science - Vol. 04 (4)-1996
Permanent URI for this collection
Tabla de contenidos
- CARACTÉRISTIQUES HISTOCHIMIQUES DU MUSCLE ET pH DE LA VIANDE DE LAPINS HYBRIDES SACRIFIÉS À DIFFÉRENTS ÂGES
- EFFECT OF THE GENOTYPE, DAY LENGTH, SEASON AND PHYSIOLOGYCAL STAGE ON THE REPRODUCTIVE PERFORMANCE OF DOE RABBITS REARED IN GUADELOUPE (F.W.I.)
- ADDITION OF PROBIOTIC TO FEEDS WITH DIFFERENT ENERGY AND ADF CONTENT IN RABBITS. 1. EFFECT ON THE DIGESTIVE ORGANS
- ADDITION OF PROBIOTIC TO FEEDS WITH DIFFERENT ENERGY AND ADF CONTENT IN RABBITS. 2. EFFECT ON MICROBIAL METABOLISM IN THE CAECUM.
- STUDY OF AN ARTIFICIAL VAGINA TO REDUCE THE MICROBIAL CONTAMINATION OF RABBIT SEMEN
- ENERGY, PROTEIN AND FIBRE DIGESTIBILITY OF SUNFLOWER HULLS, OLIVE LEAVES AND NaOH-TREATED BARLEY STRAW FOR RABBITS
- HARMONIZATION OF MUSCLE AND MEAT CRITERIA IN RABBIT MEAT RESEARCH
- NON INVASIVE METHOD TO STUDY THE BODY COMPOSITION OF RABBITS BY X-RAY COMPUTERISED TOMOGRAPHY
- NEW ZEALAND WHITE RABBIT DOES AND THEIR GROWING OFFSPRINGS AS AFFECTED BY DIETS CONTAINING DIFFERENT PROTEIN LEVEL WITH OR WITHOUT LACTO-SACC SUPPLEMENTATION.
Browse
Recent Submissions
Now showing 1 - 5 of 9
- PublicationSTUDY OF AN ARTIFICIAL VAGINA TO REDUCE THE MICROBIAL CONTAMINATION OF RABBIT SEMEN(World Rabbit Science. ICTA. UPV, 1996) Dal Bosco, A.; Scuota, S.; Castellini, C.; Cenci, T.; Ministero dell'università e della ricerca scientifica e tecnologica, Italia[EN] Aim of the work was to evaluate and improve the efficiency of an artificial vagina with a short body which permits to collect semen almost directly into the test-tube (with the least contact with the elastic sheath). At the same time, also the test-tube is not in contact with the sheath. Ten adult hybrid bucks were collected during 10 weeks. The experiment consists of 2 successive phases: 1) analysis of microbial flora naturally present in the semen; 2) evaluation of effect of exogenous contamination. Each time, 2 collections were done, using alternatively the prototype and the standard vagina (as a control) at intervals of 20 minutes (maximum 5 times). Throughout the experiment data were collected, concerning operational activities (ejaculation time and reduced sheath temperature from 45 to 35 ºC), biological quality of semen (volume, sperms concentration, live sperms) and microbial contamination rate (specific and total flora). The results showed that the time employed to collect the semen was not significantly affected by the different models of artificial vagina used. The microbial contamination of the semen collected with the prototype was lower than the other (phase a, b). The number of collections done using the same vagina did not affect biological characteristics of semen whereas increased progressively the microbiological contamination. A reduction of the contamination at the least 40% can be realized when the prototype is used (phase b).
- PublicationNON INVASIVE METHOD TO STUDY THE BODY COMPOSITION OF RABBITS BY X-RAY COMPUTERISED TOMOGRAPHY(World Rabbit Science. ICTA. UPV, 1996) ROMVARl, R.; MlLISITS, G.; SZENDRO, Zs.; SORENSEN, P.[EN] X-ray computerised tomography (CT) techniques for non-invasive and exact study of rabbit body composition are reviewed. The method is fairly accurate in determining total body fat and energy contet1! (R2=0.8-0.9), but less so in predicting total body protein content (R =0.4-0.7). lt may be also applied for the in vivo quantitation of valuable meat parta due to correlations (,..0,7) between main carcasa traits and CT data. The rather high cost of examination may be reduced by scanning three rabbits simultaneously, which corresponda 12 to 36 animals per hour. This reduced cost is comparable to that of the whole body chemical analysis or of the progeny test and, unlike the latter, the CT method does not increase the generation interval during selection. Different scanning and evaluating technics maY. be applied In the selection programa for estimation of carcasa traits, for improving the dressing percentage and to follow the development of important tissues in the same rabbit during the whole growing period.
- PublicationNEW ZEALAND WHITE RABBIT DOES AND THEIR GROWING OFFSPRINGS AS AFFECTED BY DIETS CONTAINING DIFFERENT PROTEIN LEVEL WITH OR WITHOUT LACTO-SACC SUPPLEMENTATION(World Rabbit Science. ICTA. UPV, 1996) AYYAT, M.S.; MARAI, I.F.M.; EL-AASAR, T.A.[EN] Forty New Zealand White rabbit does and their 456 (133 males and 233 females) 28 day old weaned offsprings were used in this investigation to study the effects of diets containing different protein levels with (0.1 %) or without Lacto-Sacc supplementation on their reproductiva and productiva performance. Rabbit does fed normal protein (18.4%) diet 4 recordad significantly higher litter size and weight at weaning (P<0.05) and total milk yield (P<0.01) than those fed low protein level (16.3%) and supplementation doe diets with 0.1% Lacto-Sacc in·creased significantly litter size and weight at 21 and 28 day (P<0.05) and total milk yield (P<0.01 ). The interaction effects between dietary protein and Lacto-Sacc on litter size and weight and total milk yield were not significant. In offsprings, diets containing the normal protein level (16.3%) showed significantly (P<0.01) higher values of post-weaning litter weight at 8 and 12 weeks and daily gain at 4-4, 8-12 and 4-12 weeks of age and also Lacto-Sacc addition gave significantly (P<0.05) higher values in body weight at 12 weeks and daily gain at 8-12 and 4-12 weeks of age, than in those fed diets containing low protein level (14.8%) and without Lacto-Sacc supplementation, respectively. The male rabbits were significantly (P<0.01) higher than females in litter body weight and gain. lnteraction between dietary protein and Lacto-Sacc addition showed highly significant effects (P<0.01) on final body weight at 12 weeks and daily gain at 8-12 and 4-12 weeks of age in offsprings. LactoSacc effect was apparent with the normal protein level than with the low level. The interaction effects between sex and Lacto-Sacc supplementation were highly significant on final body weight and daily gain at 4-8, 8-12 and4-12 weeks of age. Male rabbits seemed to be more affected than females by Lacto-Sacc supplementation. Feed conversion and the margin were improved with increasing dietary protein and addition of Lacto-Sacc. Analysis of covariance of carcass and non-carcass components relatively to live body weight at slaughter did not show any significant effects for the factors studied.
- PublicationHARMONIZATION OF MUSCLE AND MEAT CRITERIA IN RABBIT MEAT RESEARCH(World Rabbit Science. ICTA. UPV, 1996) OUHAYOUN, J.; DALLE ZOTTE, A.[EN] Following a first work dealing with the harmonization of carcass criteria, now published as an official document of the WRSA, the present work is devoted to muscle and meat criteria sensu stricto. The paper includes 25 criteria describing biology of muscle, physicochemistry of muscle and meat, organoleptic qualities of meat. The criteria are choosen among the most used in rabbit meat research. The presentation of each criteria includes four parts : brief definition, main interest, principie of quantification, general and specific references. The aim of this paper, is to become the second official document on harmonization of the WRSA.
- PublicationENERGY, PROTEIN AND FIBRE DIGESTIBILITY OF SUNFLOWER HULLS, OLIVE LEAVES AND NaOH-TREATED BARLEY STRAW FOR RABBITS(World Rabbit Science. ICTA. UPV, 1996) Garcia, J.; Villamide, M.J.; De Blas, J.C.; Ministerio de Educación y Ciencia[EN] One hundred and sixty nine New Zealand White x Californian rabbits were used to determine the nutritive value of sunflower hulls, olive leaves and NaOH-treated barley straw. These feedstuffs were substituted at 6, 12, 18 and 24% in a basal diet formulated for a high energy and protein content. Digestible energy (DE) values calculated by difference for the highest substitution le~els (18 and 24%) were 4.77(±0.32), 6.16(±0.37) and 4.10(±0.32) MJ kg· DM for sunflower hulls, olive leaves and NaOH-treated barley straw, respectively. Standard errors of these estimations decreased with level of substitution (by 83% on average from 6 to 24% of inclusion leve!). Crude protein digestibility values obtained were not consistent due to its high standard errors (±48 as average). The values estimated for neutral detergent fibre digestibility (%) were relatively low and had also high standard errors: 10.7(±5.70); 7.76(±7.89) and 5.76(±6.14) for sunflower hulls, olive leaves and NaOH-treated barley straw, respectively. An stepwise regression equation to predict DE value of fibrous feeds was developed from data of this work and from literature using as independent variables ash, CP, crude fibre (CF), ether e'1'1ract (%DM) and gross energy. The equ~ion obtained was: DE(MJ kg· DM)= 14.46 (±1.10) - 0.23(±0.032) CF (R =O. 781; RSD=1.43; P<0.001 ).