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 - 7 de 7

  1. USING SOME ANTIBIOTICS AND PROBIOTICS FOR ALLEVIATING HEAT STRESS ON GROWING AND DOE RABBITS IN EGYPT

    Abdel-Samee A.M.
    [EN] The influence was studied of different heat loads connected with the application of sorne antibiotics and probiotics on growth and reproductiva traits of 105 growing and 70 doe New Zealand White rabbits. The augmentation in environmental temperaturas increased the respiration rate and rectal temperatura significantly, while it significantly decreased daily body gain (24 %) and daily concentrate intake (18 %) in growing rabbits. Similarly,in does, litter size at birth and at weaning, viability percentage, young individual weight at birth and at weaning and gain from birth to weaning decreased significantly by 17, 31, 16, 27, 19 and 18% respectively. During summer, application of antibiotics: Avoparcin (AV), Flavomycin (FL) or Zinc...

  2. THE INFLUENCE OF FEEDING ON THE CHEMICAL COMPOSITION OF CARCASSES AND ON PELT QUALITY IN THE CASTOR REX RABBIT

    Petersen, A.
    [EN] The influence of feeding intensity on the chemical composition of skinned whole carcasses and on fur quality was examinad in 2 groups of Castor Rex rabbits, fed ad libitum (n = 8 ¿ and 8 <¡>¡ and 75 % of ad libitum (n = 8 ¿ and 8 ), respectively. The rabbits were born in June and pelted in December at 179 days of age. Feeding intensity strongly affected body weight at pelting (P<0.001). fat co. ntent (P

  3. LA CUNICULTURE CHINOISE

    Colin, M.
    [EN] The exact origins of rabbit domestication in China are still not very well known, and different hypotheses regarding them have been formulated. Globally, the Chinese rabbit production is mainly angora wool production orientad. This represents a value 2,5 times higher than meat and an important part of the meat comes from young angora rabbits. Nevertheless, a high number of meat proauct1on orientad rabbit farms exist in China. From a geographic point of view, the rabbit is developed mainly in Sichuan and near the coast. Globally, more than 90 % of the rabbit production comes from little farms with only few does even if sorne big rabbits farms also exist....

  4. HETEROSIS, MATERNAL AND DIRECT GENETIC EFFECTS FOR LITTER PERFORMANCE AND REPRODUCTIVE INTERVALS IN RABBIT CROSSES

    KHALIL, M.H.; AFIFI, E.A.; YOUSSEF, Y.M.K.; KHADR, A.F.
    [EN] A crossbreedin~ experiment was carried out in Egypt involving a local breed Baladi Red, BR) and an exotic one (New Zealand White, N ) to estimate direct heterosis, maternal additive effects and direct additive effects on sorne litter traits and reproductive intervals in doe rabbits. Litter traits included litter size and weight and mean young weight (at birth, 21 days and at weaning), number born alive and preweaning litter gain and mortalitv, while reproductive mtervals included days open (intervaí from kindling to next conception) and kindling interval (period between two consecutive parturitions). Data were analysed using a linear mixed model. Winter kindlings recorded the largest litter size and the heaviest weight...

  5. GENETIC AND NON-GENETIC FACTORS AFFECTING MILK PRODUCTION AND PREWEANING LITTER TRAITS OF NEW ZEALAND WHITE DOES UNDER EGYPTIAN CONDITIONS

    AYYAT, M.S.; MARAI, I.F.M.; EL-SAYIAD, GH.A.
    [EN] To study the genetic and non genetic factors affecting doe milk production and preweaning litter performance, 519 litters of New Zealand White raboit were used. Sire significantly (P<0.05) affected milk yield of the first week only, while doe afl'ected siQnificantly (P<0.01) milk yield of most of the experimental penods except the fourth week which was insignificantly affected. Milk yield was the highest in the second parity. Season of kindling affected significantly (P<0.01) milk yield in most of the weeks of the study, except the fourth which was insignificantly affected and showed the lowest yield at summer. Litter size at birth affected significantly (P<0.01) milk yield which increased by the increase of...

  6. EFFECTS OF HEAT STRESS AND AGE ON GROWTH PERFORMANCE AND ENDOCRINE STATUS OF MALE RABBIT

    Chiericato, G.M.; Boiti, C.; Canali, C.; Rizzi, C.; Ravarotto, L.
    [EN] The effect of environmental temperature and age on plasma hormonal concentrations of testosterone (Tl, dihydrotestosterone (DHT}, cortisol (C), triiodothyronine (T3) and thyroxine (T4) were evaluated in 40 male Grimaud rabbits. Twenty animals were reared at 20ºC (TNT = Thermic Neutrality Temperature) and the other 20 at 27ºC (HST = Heat Stress Temperature). Far both treatments relative humidity levels averaged 77 % and the photoperiod was 8D:16L with a light intensity of about 40 lux. The animals were fed ad libitum with a commercial pelleted feed. Blood samples were collected from each ammal by intracardiac puncture at 71 and 85 days of age. No interaction effect between temperature and age was found....

  7. COPPER-PROTEIN NUTRITION OF NEW ZEALAND WHITE RABBITS UNDER EGYPTIAN CONDITIONS

    AYYAT, M.S.; MARAI, I.F.M.; ALAZAB, A.M.
    [EN] One hundred and twenty male New Zealand White (NZW) rabbits of 35 days of age were randomly allotted to twelve groups. Rabbits of six groups were fed a low protein diet (f6.44 % crude protein) and the other six were fed a high protein diet (18.5 % crude protein). Within each dietary protein level, three groups were supplemented with copper sulfate to supply e1ther O, 100 or 200 ppm copper/kg diet, while the other three were supplemented with copper cflloride to supply the same levels of copper. Most of the studied traits were affected positively with the increase in each of protein and copper levels in the diets of...

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