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 - 9 de 9

  1. Effect of diet supplementation with live yeast (Saccharomyces cerevisiae) on performance of rabbit does and their progenies

    Belhassen, T.; Simon, E.; Potel, A.; Auclair, E.; Bergaoui, R.
    [EN] A study was conducted to determine the effect of live yeast supplementation in the diet of rabbit does on their mortality and reproductive performance and the performance of their progeny. A total of 52 cross-bred rabbit does (New Zealand×Californian) were divided into 2 groups differing in diet offered during 2 reproductive cycles and containing (group S; n=26) or not (group C; n=26) 1 g of yeast (Actisaf Sc 47, S.I. LESAFFRE, France)/kg of feed. Natural mating was performed 11 d after kindling and kits were weaned at 28 d of age. Body weight of litters was measured at birth,...

  2. An LPS based method to stimulate the inflammatory response in growing rabbits

    Knudsen, C.; Combes, S.; Mousavikhorshidi, H.; Oswald, I.; Gidenne, T. Noël
    [EN] Reliable indicators are needed to study the relationship between the inflammatory response of the growing rabbit and breeding factors such as feeding practices. A lipopolysaccharide (LPS) stimulation of the inflammatory response is a valid model of bacterial infection in laboratory animals, but no data on the growing rabbit has yet been obtained. The aim of our study was to determine an adequate dose of LPS to inject in growing rabbits in order to elicit a measurable inflammatory response in terms of plasmatic TNF-α and rise in rectal temperature. Three trials were carried out in this study: 2 development trials,...

  3. Patterns of body condition use and its impact on fertility

    Savietto, Davi; MARONO, STEFANIA; Martínez, Inés; Martinez Paredes, Eugenio Melchor; Ródenas Martínez, Luis; Cervera Fras, Mª Concepción; Pascual Amorós, Juan José
    A total of 60 nulliparous crossbred rabbit females were, a posteriori, divided into 2 experimental groups according to their natural “decision” to conceive or not at day 11 post first parturition (L: solely-lactating or LP: lactating-pregnant). This design allowed us to study the evolution of body reserves around first parturition and its influence on the future reproductive success of rabbit females. Primiparous rabbit females that failed to conceive when inseminated at day 11 post-partum (L) seemed to have a higher perirenal fat thickness (PFT) 12 d pre-partum (+0.25 mm; P=0.079) than females that conceived (LP). In the subsequent days, L...

  4. Comparison of productive and carcass traits and economic value of lines selected for different criteria, slaughtered at similar weights

    Szendrő, K.; Szendrő, ZS.; Gerencsér, ZS.; Radnai, I.; Horn, P.; Matics, ZS.
    [EN] The aim of the experiment was to compare 3 genetic groups, slaughtered at similar weights, to examine their productive and carcass traits and economic value. Three lines of the Pannon Breeding Programme, selected for different criteria, were examined in the experiment. Pannon Ka (PKa, maternal line) does were inseminated with semen of PKa, Pannon White (PWhite) or Pannon Large (PLarge, terminal line) bucks. The kits (PKa×PKa, PWhite×PKa, PLarge×PKa; n=60 in each genetic group) were weaned at 35 d of age and reared until 88, 83 and 79, respectively, when they reached similar body weights for slaughtering (2.8 kg). The...

  5. Alternative and enriched housing systems for breeding does: a review

    Szendrő, ZS.; McNitt, J.I.; Matics, ZS.; Mikó, A.; Gerencsér, ZS.
    [EN] The main results and observations on group and individually housed rabbit does were reviewed by Szendrő and McNitt in 2012, but in recent years several new papers in this field have been published. This provides a new opportunity to summarise the current knowledge on alternative housing systems for breeding does. In Switzerland, rabbit does are generally housed in group systems. The recently legislated Belgian and Dutch housing systems will be converted step by step into group housing systems. Recent research demonstrated that with semi-group housing systems much better performance levels are possible than with the Swiss group housing system....

  6. Use of high concentrations of carbon dioxide for stunning rabbits reared for meat production

    Dalmau, A.; Pallisera, J.; Pedernera, C.; Muñoz, I.; Carreras, R.; Casal, N.; Mainau, E.; Rodriguez, P.; Velarde, A.
    [EN] An investigation was performed to determine whether high concentrations of carbon dioxide (CO2) at 70-98% in atmospheric air are a suitable alternative for stunning rabbits compared to conventional approaches such as electronarcosis. Aversion to the gas and efficacy in causing prolonged unconsciousness and death were studied in a total of 480 rabbits by means of behavioural parameters, physiological indicators (presence of rhythmic breathing and corneal reflex) and electroencephalography (EEG, brain function). The use of any of the 4 studied concentrations of the gas caused more nasal discomfort and vocalisations than the use of atmospheric air (P<0.001). EEG activity confirmed...

  7. Technical note: concentration and composition of airborne aerobic bacteria inside an enclosed rabbit shed

    Li, S.; Li, M.Y.; Mu, T.; Miao, Z.M.
    [EN] Numerous studies have been conducted to analyse bacterial aerosols in animal houses, which is beneficial for the control of animal diseases. However, little information on aerosols in enclosed rabbit sheds was available. An FA-1 sampler was employed to collect air samples in an enclosed rabbit house in the Qingdao region of China. Concentration, composition, and aerodynamics of bacterial aerosols inside the enclosed rabbit shed were systematically analysed. The concentration of airborne bacteria inside the rabbit shed was 2.11-6.36×104 colony forming unit/m3 (CFU/m3). Seventeen species of bacteria belonging to eight genera were identified. Among these, there were 11 species belonging...

  8. Study of failures in a rabbit line selected for growth rate

    Naturil Alfonso, Carmen; Lavara García, Raquel; Millán, P.; Rebollar, P.G.; Vicente Antón, José Salvador; Marco Jiménez, Francisco
    [EN] Selection for growth rate is negatively related with reproductive fitness. The aim of this work was to analyse the causes of fertility failure in rabbit does selected for growth rate and characterised for reproductive deficiencies (line R). In the experiment, 82 does were divided into 2 groups: naturally mated (NM) and artificially inseminated (AI), to relate luteinizing hormone (LH) concentration with ovulation induction and pregnancy rate by laparoscopic determination. Additionally, in 38 of these females ovulation rate and metabolites determination (leptin, NEFA, BOHB and glucose) were analysed and perirenal fat thickness measurement and live body weight (LBW) determined. The...

  9. Short communication: effect of saccharomyces cerevisiae supplementation on some biomarkers of oxidative stress in weaned rabbits during the hot-dry season

    Shehu, B.M.; Ayanwale, B.A.; Ayo, J.O.; Uchendu, C.
    [EN] A feeding trial was conducted to evaluate the effect of Saccharomyces cerevisiae (SC) supplementation on some biomarkers of oxidative stress in rabbits during the hot-dry season (temperaturehumidity index: 33.2±0.9oC). Sixty healthy weaned crossbred rabbits, aged between 5-6 wk with live weight of 612.7±60.8 g (mean±standard deviation) were used. The rabbits were divided into 5 treatment groups; SC0 receiving a control diet without supplementation of SC, and SC2, SC4, SC6 and SC8 receiving the control diet supplemented with SC at the rate of 2, 4, 6 and 8×109 colony forming units/kg, respectively. The activity of total superoxide dismutase and malonaldehyde in serum were not significantly affected,...

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