42 research outputs found

    Litter Survival Differences between Divergently Selected Lines for Environmental Sensitivity in Rabbits

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    [EN] Simple Summary Two rabbit lines are divergently selected for increasing or decreasing the variability of litter size at birth. Decreasing the litter size variability produces more resilient females with less sensitivity to diseases, being an indirect selection way to improve environmental sensitivity. The kits' survival rate at weaning was higher in the homogeneous line. Moreover, this line led to a greater uniformity of the kits' weight at weaning, although the weight variability at birth was higher, which could be due to a higher lactation capacity of the homogeneous line. A divergent selection experiment on environmental sensitivity was performed in rabbits. The aim was to estimate the correlated response in kit weight and survival, litter weight, and weight distance from birth to weaning. The weight distance was calculated as the absolute value of the differences between the individual value and the mean value of its litter. The relationship between the probability of survival at 4 d of age, and the weight at birth, was studied. Environmental sensitivity was measured as litter size variability. A total of 2484 kits from 127 does from the low line, and 1916 kits of 114 does from the high line of the 12th generation were weighed. Both of the lines showed similar individual and litter weights at birth and weaning, and a similar survival rate at birth, and at 4 d of age. The survival rate at weaning was higher in the low line (0.67 and 0.62; P = 0.93). The weight distance was higher at birth, but lower at weaning in the low line (47.8 g and 54.1 g; P = 0.98). When the weight at birth was high, the kits had a higher survival rate. In conclusion, selection for environmental sensitivity showed a correlated response in the kits' survival, and in the homogeneity of litter weight at weaning.This study is supported by the Spanish Ministry of Economy and Competitiveness (MINECO) with the Projects AGL2017-86083, C2-1-P and C2-2-P.Agea, I.; Garcia, M.; Blasco Mateu, A.; Argente, M. (2019). Litter Survival Differences between Divergently Selected Lines for Environmental Sensitivity in Rabbits. Animals. 9(9):1-9. https://doi.org/10.3390/ani9090603S1999Garcı́a, M. L., & Baselga, M. (2002). Estimation of genetic response to selection in litter size of rabbits using a cryopreserved control population. Livestock Production Science, 74(1), 45-53. doi:10.1016/s0301-6226(01)00280-9Sánchez, J. P., Theilgaard, P., Mínguez, C., & Baselga, M. (2008). Constitution and evaluation of a long-lived productive rabbit line1. 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Correlated response to selection for litter size environmental variability in rabbits’ resilience. animal, 13(10), 2348-2355. doi:10.1017/s1751731119000302Bolet, G., EsparbiĂ©, J., & FaliĂšres, J. (1996). Relations entre le nombre de fƓtus par corne utĂ©rine, la taille de portĂ©e Ă  la naissance et la croissance pondĂ©rale des lapereaux. Annales de Zootechnie, 45(2), 185-200. doi:10.1051/animres:19960207Poigner J., SzendrĂ” Zs., LĂ©vai A., Radnai I., & BirĂł-NĂ©meth E. (2010). EFFECT OF BIRTH WEIGHT AND LITTER SIZE ON GROWTH AND MORTALITY IN RABBITS. World Rabbit Science, 8(1). doi:10.4995/wrs.2000.413TM Threshold Modelhttp://snp.toulouse.inra.fr/~alegarra/manualtm.pdfPeirĂł, R., Badawy, A. Y., Blasco, A., & Santacreu, M. A. (2019). Correlated responses on growth traits after two-stage selection for ovulation rate and litter size in rabbits. animal, 13(11), 2457-2462. doi:10.1017/s1751731119001423Pascual, J. J., Savietto, D., Cervera, C., & Baselga, M. (2013). Resources allocation in reproductive rabbit does: a review of feeding and genetic strategies for suitable performance. World Rabbit Science, 21(3). doi:10.4995/wrs.2013.1236Bolet, G., Garreau, H., Joly, T., Theau-Clement, M., Falieres, J., Hurtaud, J., & Bodin, L. (2007). Genetic homogenisation of birth weight in rabbits: Indirect selection response for uterine horn characteristics. Livestock Science, 111(1-2), 28-32. doi:10.1016/j.livsci.2006.11.012Garreau, H., Bolet, G., Larzul, C., Robert-GraniĂ©, C., Saleil, G., SanCristobal, M., & Bodin, L. (2008). Results of four generations of a canalising selection for rabbit birth weight. Livestock Science, 119(1-3), 55-62. doi:10.1016/j.livsci.2008.02.009Hamilton, H. H., Lukefahr, S. D., & McNitt, J. I. (1997). Maternal nest quality and its influence on litter survival and weaning performance in commercial rabbits. Journal of Animal Science, 75(4), 926. doi:10.2527/1997.754926xVicente, J., GarcĂ­a-XimĂ©nez, F., & Viudes-de-Castro, M. (1995). 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Reproduction Nutrition Development, 40(1), 19-32. doi:10.1051/rnd:2000117Argente, M. J., Santacreu, M. A., Climent, A., & Blasco, A. (1999). Phenotypic and genetic parameters of birth weight and weaning weight of rabbits born from unilaterally ovariectomized and intact does. Livestock Production Science, 57(2), 159-167. doi:10.1016/s0301-6226(98)00166-3Xiccato, G., Trocino, A., Sartori, A., & Queaque, P. I. (2004). Effect of parity order and litter weaning age on the performance and body energy balance of rabbit does. Livestock Production Science, 85(2-3), 239-251. doi:10.1016/s0301-6226(03)00125-8Rebollar, P. G., PĂ©rez-Cabal, M. A., Pereda, N., Lorenzo, P. L., Arias-Álvarez, M., & GarcĂ­a-Rebollar, P. (2009). Effects of parity order and reproductive management on the efficiency of rabbit productive systems. Livestock Science, 121(2-3), 227-233. doi:10.1016/j.livsci.2008.06.01

    ProcĂ©s projectual d’un alçavidres

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    L’objectiu d’aquest treball Ă©s dissenyar el procĂ©s de gestiĂł d’un projecte d’automociĂł tipus fent especial atenciĂł en els punts econĂČmics i de planificaciĂł. El procĂ©s projectual estĂ  basat en un cas real d’un projecte d’alçavidres (element mĂČbil fixat a la porta que mitjançant un cable enrotllat en un tambor fa lliscar el vidre per un carril amb ajuda manual o elĂšctrica-motor. El projecte contĂ© un manual en forma d’arxiu d’Excel que permet fer fĂ cilment el seguiment d’un projecte d’automociĂł. L’arxiu inclou tots els punts que es van anar elaborant en el cas real aixĂ­ com el resultat dels mateixos. Alhora s’inclou una base de dades en format ACCES que permet fer el seguiment de cadascuna de les modificacions al llarg d’un projecte per cadascun dels departaments implicats

    Integración didáctica de "apps” relacionadas con la producción animal en la docencia universitaria del Grado de Ingeniería Agroalimentaria y Agroambiental

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    [ES] El objetivo de este trabajo es la integraciĂłn didĂĄctica de apps que se utilizan en la gestiĂłn de explotaciones ganaderas en el Grado de IngenierĂ­a Agroalimentaria y Agroambiental. Los resultados acadĂ©micos indicaron que las calificaciones mejoraron en 1.67 puntos cuando las apps fueron incluidas en la docencia. AdemĂĄs se realizĂł un cuestionario al estudiantado resultando que mĂĄs del 66% respondiĂł “Totalmente de acuerdo” a la sentencia “La tarea propuesta me ha facilitado el aprendizaje del tema”. Ésta fue tambiĂ©n la respuesta para el 33% del estudiantado a las sentencias “La utilizaciĂłn de las apps me ha ayudado a comprender el tema” y “RecomendarĂ­a el uso de apps en otros temas de la asignatura”. “Ni de acuerdo ni en desacuerdo”, fue la respuesta seleccionada por el 66% del estudiantado para la sentencia “La utilizaciĂłn de las apps me ha acercado a la realidad del sector ganadero”. Las conclusiones de este trabajo son que la incorporaciĂłn de apps en la docencia mejora el rendimiento acadĂ©mico del estudiantado pues facilitan el aprendizaje. SerĂ­a aconsejable la utilizaciĂłn de esta metodologĂ­a en otros temas de la asignatura.[EN] The objective of this work is the didactic integration of apps that are used in the management of livestock farms in the Degree in Agro-Food and Agro-Environmental Engineering. The academic results indicated that the scores improved by 1.67 points when the apps were included in the teaching. In addition, a questionnaire was carried out for the student, resulting that more than 66% of the students answered "Totally agree" to the sentence "The proposed task has made it easier for me to learn the subject". This was also the response for 33% of the students to the sentences "The use of apps has helped me understand the subject" and "I would recommend the use of apps in other subjects of the subject". The answer "Neither agree nor disagree" was the answer selected by 66% of the students for the sentence "The use of apps has brought me closer to that of the livestock sector". The conclusions of this work are that the introduction of apps in teaching improves the academic performance of the student as they facilitate learning. It would be advisable to apply this methodology to other subjects.GarcĂ­a, ML.; Agea, I.; Argente, MJ. (2020). IntegraciĂłn didĂĄctica de "apps” relacionadas con la producciĂłn animal en la docencia universitaria del Grado de IngenierĂ­a Agroalimentaria y Agroambiental. En IN-RED 2020: VI Congreso de InnovaciĂłn Educativa y Docencia en Red. Editorial Universitat PolitĂšcnica de ValĂšncia. 110-115. https://doi.org/10.4995/INRED2020.2020.11997OCS11011

    CD1: A Singed Cat of the Three Antigen Presentation Systems

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    ProcĂ©s projectual d’un alçavidres

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    L’objectiu d’aquest treball Ă©s dissenyar el procĂ©s de gestiĂł d’un projecte d’automociĂł tipus fent especial atenciĂł en els punts econĂČmics i de planificaciĂł. El procĂ©s projectual estĂ  basat en un cas real d’un projecte d’alçavidres (element mĂČbil fixat a la porta que mitjançant un cable enrotllat en un tambor fa lliscar el vidre per un carril amb ajuda manual o elĂšctrica-motor. El projecte contĂ© un manual en forma d’arxiu d’Excel que permet fer fĂ cilment el seguiment d’un projecte d’automociĂł. L’arxiu inclou tots els punts que es van anar elaborant en el cas real aixĂ­ com el resultat dels mateixos. Alhora s’inclou una base de dades en format ACCES que permet fer el seguiment de cadascuna de les modificacions al llarg d’un projecte per cadascun dels departaments implicats

    ProcĂ©s projectual d’un alçavidres

    No full text
    L’objectiu d’aquest treball Ă©s dissenyar el procĂ©s de gestiĂł d’un projecte d’automociĂł tipus fent especial atenciĂł en els punts econĂČmics i de planificaciĂł. El procĂ©s projectual estĂ  basat en un cas real d’un projecte d’alçavidres (element mĂČbil fixat a la porta que mitjançant un cable enrotllat en un tambor fa lliscar el vidre per un carril amb ajuda manual o elĂšctrica-motor. El projecte contĂ© un manual en forma d’arxiu d’Excel que permet fer fĂ cilment el seguiment d’un projecte d’automociĂł. L’arxiu inclou tots els punts que es van anar elaborant en el cas real aixĂ­ com el resultat dels mateixos. Alhora s’inclou una base de dades en format ACCES que permet fer el seguiment de cadascuna de les modificacions al llarg d’un projecte per cadascun dels departaments implicats

    III Curs d'Estiu "Comtat d'Urgell"

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    III Curs d'Estiu "Comtat d'Urgell"

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    Aspectos de la genĂ©tica molecular cunicola. Caso prĂĄctico (2ÂȘ parte)

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