Recursos de colección

RiuNet. Repositorio institucional de la Universitat de Valencia (102.815 recursos)

RiuNet es el Repositorio Institucional de la Universitat Politècnica de València, gestionado por la Biblioteca, cuyo objetivo es ofrecer acceso en Internet a la producción científica, académica y corporativa de la comunidad universitaria con la finalidad de aumentar su visibilidad y hacerla accesible y preservable.

Mostrando recursos 1 - 17 de 17

  1. STUDY OF AN ARTIFICIAL VAGINA TO REDUCE THE MICROBIAL CONTAMINATION OF RABBIT SEMEN

    Dal Bosco, A.; Scuota, S.; Castellini, C.; Cenci, T.
    [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)....

  2. STUDY OF AN ARTIFICIAL VAGINA TO REDUCE THE MICROBIAL CONTAMINATION OF RABBIT SEMEN

    Dal Bosco, A.; Scuota, S.; Castellini, C.; Cenci, T.
    [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)....

  3. NON INVASIVE METHOD TO STUDY THE BODY COMPOSITION OF RABBITS BY X-RAY COMPUTERISED TOMOGRAPHY

    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...

  4. NON INVASIVE METHOD TO STUDY THE BODY COMPOSITION OF RABBITS BY X-RAY COMPUTERISED TOMOGRAPHY

    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...

  5. NEW ZEALAND WHITE RABBIT DOES AND THEIR GROWING OFFSPRINGS AS AFFECTED BY DIETS CONTAINING DIFFERENT PROTEIN LEVEL WITH OR WITHOUT LACTO-SACC SUPPLEMENTATION.

    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...

  6. NEW ZEALAND WHITE RABBIT DOES AND THEIR GROWING OFFSPRINGS AS AFFECTED BY DIETS CONTAINING DIFFERENT PROTEIN LEVEL WITH OR WITHOUT LACTO-SACC SUPPLEMENTATION.

    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...

  7. HARMONIZATION OF MUSCLE AND MEAT CRITERIA IN RABBIT MEAT RESEARCH

    DALLE ZOTTE, A.; OUHAYOUN, J.
    [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.

  8. HARMONIZATION OF MUSCLE AND MEAT CRITERIA IN RABBIT MEAT RESEARCH

    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.

  9. ENERGY, PROTEIN AND FIBRE DIGESTIBILITY OF SUNFLOWER HULLS, OLIVE LEAVES AND NaOH-TREATED BARLEY STRAW FOR RABBITS

    Garcia, J.; Villamide, M.J.; Blas, J.C. de
    [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...

  10. ENERGY, PROTEIN AND FIBRE DIGESTIBILITY OF SUNFLOWER HULLS, OLIVE LEAVES AND NaOH-TREATED BARLEY STRAW FOR RABBITS

    Garcia, J.; Villamide, M.J.; De Blas, J.C.
    [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...

  11. EFFECT OF THE GENOTYPE, DAY LENGTH, SEASON AND PHYSIOLOGYCAL STAGE ON THE REPRODUCTIVE PERFORMANCE OF DOE RABBITS REARED IN GUADELOUPE (F.W.I.)

    DEPRES, E.; THEAU-CLEMENT, M.; LORVELEC, O.
    [EN] The aim of this study was to compare under tropical climate conditions the reproductive performance of doe rabbits as affected by the genotype (NZ vs NZXCAL), lighting conditions (11 h of natural light + 5h of artificial light per day vs 11 h of natural light), the season (hot and wet vs cool and dry) and the physiological stage (nursing or non nursing females at mating ). A total of 272 matings were analysed. Fertility was not affected by any of these factors. The litter size of crossbred females (NZXCAL) was higher than that of purebred ones (NZ) (8.2 vs 7.1; P<0.05). However, this superiority was only observed...

  12. EFFECT OF THE GENOTYPE, DAY LENGTH, SEASON AND PHYSIOLOGYCAL STAGE ON THE REPRODUCTIVE PERFORMANCE OF DOE RABBITS REARED IN GUADELOUPE (F.W.I.)

    DEPRES, E.; THEAU-CLEMENT, M.; LORVELEC, O.
    [EN] The aim of this study was to compare under tropical climate conditions the reproductive performance of doe rabbits as affected by the genotype (NZ vs NZXCAL), lighting conditions (11 h of natural light + 5h of artificial light per day vs 11 h of natural light), the season (hot and wet vs cool and dry) and the physiological stage (nursing or non nursing females at mating ). A total of 272 matings were analysed. Fertility was not affected by any of these factors. The litter size of crossbred females (NZXCAL) was higher than that of purebred ones (NZ) (8.2 vs 7.1; P<0.05). However, this superiority was only observed...

  13. CARACTÉRISTIQUES HISTOCHIMIQUES DU MUSCLE ET pH DE LA VIANDE DE LAPINS HYBRIDES SACRIFIÉS À DIFFÉRENTS ÂGES

    Lambertini, L.; Lalatta Costerbosa, G.; Petrosino, G.; Zaghini, G.; Vignola, G.; Benassi, M-C; Gatta, P.P.
    [EN] To study the effects of genetic type, different slaughtering ages (75, 85 and 95 days} and sex on pH of muscles Bíceps femoris, Latíssímus dorsí and So/eus (45 min. and 24 h post mortem} and on the level of collagen in lumbar muscle (Longíssímus lumborum), 60 hybrid rabbits (30 Hyla, 30 Provisal) were used. On 18 male rabbit carcasses (3 ages x 2 genetic types) histochemical characteristics, fibre diameter and fibre/connective tissue ratio were determined in these same muscles. Percentages of the different fibre type are not influenced by the slaugthering age, whilst important differences (P<0.05} were recorded between genetic lines for all fibre types. The percentage of 1...

  14. CARACTÉRISTIQUES HISTOCHIMIQUES DU MUSCLE ET pH DE LA VIANDE DE LAPINS HYBRIDES SACRIFIÉS À DIFFÉRENTS ÂGES

    Lambertini, L.; Lalatta Costerbosa, G.; Petrosino, G.; Zaghini, G.; Vignola, G.; Benassi, M-C; Gatta, P.P.
    [EN] To study the effects of genetic type, different slaughtering ages (75, 85 and 95 days} and sex on pH of muscles Bíceps femoris, Latíssímus dorsí and So/eus (45 min. and 24 h post mortem} and on the level of collagen in lumbar muscle (Longíssímus lumborum), 60 hybrid rabbits (30 Hyla, 30 Provisal) were used. On 18 male rabbit carcasses (3 ages x 2 genetic types) histochemical characteristics, fibre diameter and fibre/connective tissue ratio were determined in these same muscles. Percentages of the different fibre type are not influenced by the slaugthering age, whilst important differences (P<0.05} were recorded between genetic lines for all fibre types. The percentage of 1...

  15. ADDITION OF PROBIOTIC TO FEEDS WITH DIFFERENT ENERGY AND ADF CONTENT IN RABBITS. 2. EFFECT ON MICROBIAL METABOLISM IN THE CAECUM.

    Kermauner, A.; Struklec, M.; Marinsek Logar, R.
    [EN] Effects of feed composition, addition of the probiotic Acid-Pak 4-Way (AP4W), sex, age at slaughtering (53 or 67 d.)and interactlons between feed and the addltion of AP4W, age and feed, age and AP4W and age and sex on the fermentation pattem in the caecum of 84 weaned New Zealand Whlte rabblts were studied. Three complete feed mixtures with different levels of digestible energy (DE, in MJ/kg of feed) and ADF content (in g/kg dry matterDM) were tested (feed 1 had recommended DE and h1gh ADF content: 9.22 MJ and 299 g ADF; feed 11 had 11.60 MJ and 254 g ADF; feed 111 had high DE and recommended...

  16. ADDITION OF PROBIOTIC TO FEEDS WITH DIFFERENT ENERGY AND ADF CONTENT IN RABBITS. 2. EFFECT ON MICROBIAL METABOLISM IN THE CAECUM.

    Kermauner, A.; Struklec, M.; Marinsek Logar, R.
    [EN] Effects of feed composition, addition of the probiotic Acid-Pak 4-Way (AP4W), sex, age at slaughtering (53 or 67 d.)and interactlons between feed and the addltion of AP4W, age and feed, age and AP4W and age and sex on the fermentation pattem in the caecum of 84 weaned New Zealand Whlte rabblts were studied. Three complete feed mixtures with different levels of digestible energy (DE, in MJ/kg of feed) and ADF content (in g/kg dry matterDM) were tested (feed 1 had recommended DE and h1gh ADF content: 9.22 MJ and 299 g ADF; feed 11 had 11.60 MJ and 254 g ADF; feed 111 had high DE and recommended...

  17. ADDITION OF PROBIOTIC TO FEEDS WITH DIFFERENT ENERGY AND ADF CONTENT IN RABBITS. 1. EFFECT ON THE DIGESTIVE ORGANS

    Kermauner, A.; Struklec, M.
    [EN] Effects of feed composition, addition of the probiotic Acid-Pak 4-Way (AP4W), sex, age at slaughtering (53 or 67 d.) and interactions between feed and AP4W, age and feed, age and AP4W and age and sex on gastrointestinal (GI) tract weight and dressing percentage of 84 weaned New Zealand White rabbits were studied. Three complete feed mixtures with different levels of digestible energy (DE, MJ/kg of feed) and ADF content (g/kg of dry matter-DM) were tested (feed 1 had recommended DE and high ADF content: 9.22 MJ DE and 299 g ADF; feed 11 had 11.60 MJ DE and 254 g ADF; feed 111 had high energy and recommended...

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