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 - 6 de 6

  1. INFLUENCES OF SEASON AND DIETARY SUPPLEMENTATION WITH SELENIUM AND VITAMIN E OR ZINC ON SOME BLOOD CONSTITUENTS AND SEMEN QUALITY OF NEW ZEALAND WHITE RABBIT MALES.

    El-Masry, K.A.; Nasr, A.S.; Kamal, T.H.
    [EN] In a first experiment, six New Zealand White (NZW) rabbit males (12-15 months old) were subjected to winter (16 ± 3ºC and 71 ± 8 % RH) and then to summer (35 ± 3ºC and 46 ± 8 % RH) conditions to study the influence of hot summer season on sorne blood constituents and semen quality of rabbits males. The results showed that hot summer season significantly increased glucose, cholesterol, phospholipid, total lipid concentrations and transaminase enzymes activity in blood, whereas a significant decrease in blood concentrations of total protein, albumin and testosterone were recorded. During hot summer, there were significant rises in whole semen transaminase levels and dead sperm %,...

  2. INFLUENCES OF SEASON AND DIETARY SUPPLEMENTATION WITH SELENIUM AND VITAMIN E OR ZINC ON SOME BLOOD CONSTITUENTS AND SEMEN QUALITY OF NEW ZEALAND WHITE RABBIT MALES.

    El-Masry, K.A.; Nasr, A.S.; Kamal, T.H.
    [EN] In a first experiment, six New Zealand White (NZW) rabbit males (12-15 months old) were subjected to winter (16 ± 3ºC and 71 ± 8 % RH) and then to summer (35 ± 3ºC and 46 ± 8 % RH) conditions to study the influence of hot summer season on sorne blood constituents and semen quality of rabbits males. The results showed that hot summer season significantly increased glucose, cholesterol, phospholipid, total lipid concentrations and transaminase enzymes activity in blood, whereas a significant decrease in blood concentrations of total protein, albumin and testosterone were recorded. During hot summer, there were significant rises in whole semen transaminase levels and dead sperm %,...

  3. GROUPING OF RABBIT REPRODUCTION MANAGEMENT BY MEANS OF ARTIFICIAL INSEMINATION

    Rebollar, P.G.; Alvariño, J.M.R.; Ubilla, E.
    [EN] One hundred and thirty does of the Californian x New Zealand breed were artificially inseminated on a fixed day of the week, during a thirteen months long study. All insemination were performed on Monday, using 1 mi diluted semen. Does with less than 8 youngs/litter (M1) were inseminated on day 3 or 4 post-partum (PP.), and rabbits with than 8 or more youngs/litter (M2) on day 1 O or 11 PP. All does found non pregnant were considered pseudopregnant and inseminated on day 24 PP. (M3). The first artificial insemination (A.I.) in nulliparous rabbits was performed at 4 months of age. 1679 A.I. were carried out during this experiment. Ovulation...

  4. GENETIC PARAMETERS FOR MEAT PRODUCTION IN RABBITS. 1 - NON CARCASS COMPONENTS.

    Ayyat, M.S.; Anous, M.R.; Sadek, M.H.
    [EN] Data of 122 males rabbits, randomly sampled from 19 sires of New Zealand White breed raised on two farms in Sharkia Governorate, Egypt, were analysed to provide estimates of heritabilities for non carcass components and to obtain estimates of genetic and phenotypic correlations among these components. All rabbits were slaughtered when reached a live body weight of approximately 2 kg. The weights of non carcass components and hot carcass were recorded and dressing percentages were also calculated. Least squares analysis of variance showed that weights of rabbit non carcass components were more influenced by the effect of farm adjusted to the effect of slaughter weight, whereas they were slightly influenced by...

  5. EFFECT OF ILEAL CANNULATION ON RABBIT DIGESTION AND CAECOTROPHY : AN INTERLABORATORY STUDY.

    Gidenne, T.; Blas Ferrer, Enrique; Carabaño, R.; Merino, J.M.
    [EN] An interlaboratory study, concerning the effect of ileal cannulation on the digestion and caecotrophy in the rabbit, was performed simultaneously in three experimental locations using the same procedure. In the absence of simultaneous ileal digesta sampling, the digestibility of dry matter or fibre (NDF, ADF) did not differ between cannulated or control rabbits. But, a lower crude protein digestibility (-2.6 points) was observed for cannulated animals, as a consequence of a reduced recycling of protein originating from a lower excretion of soft faeces (12.2 vs 16, 1 gDM/d, P=0.011 ). As hard faeces excretion did not differ between the two groups, the ratio hard/soft faeces was higher in cannulated rabbits. Simultaneous...

  6. CYCLE SYNCHRONIZATION OF RABBIT DOES NATURALLY MATED OR ARTIFICIALLY INSEMINATED

    Armero, E.; Garcia-Ximénez, F.; Vicente Antón, José Salvador; Baselga Izquierdo, Manuel
    [EN] Effects of Gonadorelin and PMSG on a cycle synchronization of 42 days were evaluated. Three hundred and seventy five does were used in two experiments. In the first, does were split in two groups, a group of 120 does received 25 IU PMSG 48 hours befare mating and a Gonadorelin i.m. injection (20 μg) just after mating. The other 120 does group received only the same dose of Gonadorelin i.m. just after mating. In the second experiment ali does were injected with 25 IU of PMSG 48 hours befare mating (65 does) or artificial insemination (70 does). Pregnancy was checked 12 days later in both experiments and non pregnant does...

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