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. Semen characteristics and sexual hormones of Hy-Plus rabbit bucks influenced by a dietary multi-enzymes additive

    Gado, H.; Mellado, M.; Salem, A.; Zaragoza, A.; Seleem, T.S.T.
    [EN] A total of 144 adult Hy-Plus rabbit bucks were randomly assigned into  four treatments of 36 replicates each, in a completely randomized design. Animals were fed ad libitum on basal diet supplemented with an enzyme complex (EZ) at 0 (EZ0), 1 (EZ1), 3 (EZ3) and 5 (EZ5) kg/ton of feed. Total sperm count was higher (P<0.05) in EZ5 than in EZ0. Sperm motility increased with increasing levels of the EZ additive being lowest for EZ0 and highest for EZ5 rabbits (P<0.05). Percentage of dead sperm was higher (P<0.05) in EZ0 than in EZ5 rabbits. Rabbit bucks received the highest levele...

  2. Milk yield prediction at late lactation in reproductive rabbit does

    Arnau Bonachera, Alberto; Cervera Fras, Mª Concepción; Blas Ferrer, Enrique; Pascual Amorós, Juan José
    Separating kits and mother to determine milk yield at 4th wk of lactation (MY4) could have negative consequences on the training and development of young rabbits. In this work, a total of 313 lactation curves (28 d long), taken from 2 different trials, were used to fit regression models to estimate MY4. In both trials, females were subjected to a semi-intensive reproductive rhythm [insemination at 11 d post-partum (dpp) and weaning at 28 dpp], but diets, genetic types, parity order and day of controls were slightly different. The models included variables which, according to the bibliography, are related to milk yield...

  3. Milk yield prediction at late lactation in reproductive rabbit does

    Arnau Bonachera, Alberto; Cervera Fras, Mª Concepción; Blas Ferrer, Enrique; Pascual Amorós, Juan José
    [EN] Separating kits and mother to determine milk yield at 4th wk of lactation (MY4) could have negative consequences on the training and development of young rabbits. In this work, a total of 313 lactation curves (28 d long), taken from 2 different trials, were used to fit regression models to estimate MY4. In both trials, females were subjected to a semi-intensive reproductive rhythm [insemination at 11 d post-partum (dpp) and weaning at 28 dpp], but diets, genetic types, parity order and day of controls were slightly different. The models included variables which, according to the bibliography, are related to milk...

  4. Effect of human menopausal gonadotropin on testicular morphometry, gonadal and extragonadal sperm reserves of rabbit bucks

    Ansa, Anietie Archibong; Imasuen, James A.
    [EN] Testicular morphometry, gonadal and extragonadal sperm reserves of rabbit bucks treated with Human Menopausal Gonadotrophin (Menogon®) were studied. Twenty-four crossbred rabbit bucks weighing 1.3-1.6 kg at 15-17 wk were randomised into 4 treatment doses of 0 (control), 7.5, 15.0, and 22.5 I.U. in a completely randomised design with 6 bucks per group. A vial of Menogon® was reconstituted in 1 mL of physiological saline solution and administered intramuscularly at 72 h intervals for 56 d prior to commencement of sample collection. Parameters evaluated were ejaculate concentration, testicular morphometry, gonadal and extragonadal sperm concentrations. Results for ejaculate concentration (86, 110, 186, and 135×106/mm3) revealed a significantly (P<0.05)...

  5. Changes in responsiveness to kit odours across pregnancy: relevance for the onset of maternal behaviour

    Chirino, Rosario; González-Mariscal, Gabriela
    Virgin does are indifferent to foster kits but lesions to the main or accessory olfactory systems allow them to behave “maternally” (i.e., they crouch over the litter and allow suckling). This suggests that kit-derived olfactory cues are aversive to virgins but not to lactating does. We hypothesised that the valence of such olfactory cues changes throughout gestation so that, at parturition, does are attracted to the newborn and can then show placentophagia, clean the kits and nurse them. To explore this hypothesis we exposed does to 2 nest boxes containing a variety of pup-derived vs. “neutral” odours, quantifying the number of sniffs and entrances to each...

  6. Abstracts of the 40th Symposium on Cuniculture, ASESCU Santiago de Compostela, Spain, 28th-29th May, 2015


    [EN] The 40th Congress of the Spanish Association of Cuniculture (ASESCU) was held in Santiago de Compostela from 28th to 29th May 2015. This is the 40th edition of the conference, held annually without interruption since 1976. Main papers focused on analysing the current rabbit sector situation in the north-western Iberian Peninsula, genetic improvement of meat rabbit and foundation of new lines. The future of meat rabbit production and the rabbit meat production value chain was discussed, with the results of the partnership between the Spanish Institute of Agricultural Research (INIA) and the rabbit marketing board (INTERCUN) to support research projects. A round table was also...

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