World Rabbit Science - Vol. 13 (4)-2005https://riunet.upv.es:443/handle/10251/95282024-03-28T23:03:09Z2024-03-28T23:03:09ZAbstracts of the Reproduction section presented during the 8th World Rabbit Congress, Puebla, Mexico 7-10. 2004https://riunet.upv.es:443/handle/10251/97062023-11-21T11:52:05Z2011-02-11T12:37:02ZAbstracts of the Reproduction section presented during the 8th World Rabbit Congress, Puebla, Mexico 7-10. 2004
2011-02-11T12:37:02ZThe behaviour of farm rabbit does around parturition and during lactationFernández-Carmona, J.Solar, A.Pascual Amorós, Juan JoséBlas, E.Cervera, C.https://riunet.upv.es:443/handle/10251/97042023-11-21T11:52:05Z2011-02-11T12:27:02ZThe behaviour of farm rabbit does around parturition and during lactation
Fernández-Carmona, J.; Solar, A.; Pascual Amorós, Juan José; Blas, E.; Cervera, C.
[EN] The effects of parturition and lactation were assessed on eleven multiparous rabbit does caged under farm conditions. Frequency and time for different activities (drinking, eating, caecotrophy, nesting, grooming, chewing, attention to neighbour and resting) were studied for the day of parturition, and days 1, 10 and 28 of lactation. Parturition: Does spent most time during the dark period in drinking (85%) and eating (63%). Conversely, 79% of the time spent in caecotrophy and 55% in resting were recorded during the light period. Eating time was 104 minutes per day, being higher during the dark period and after delivery. Females rested 33 minutes per hour and started one of the observed activities 39 times per hour. A general tendency to reduce main activities was observed around parturition with the exception of time spent nesting. Lactation: Does spent most time during the dark period in drinking (59%), eating (59%), grooming (55%) and neighbour (72%) while they spent less time resting (46%). The level of activity in parturition seems to be maintained or increased on the following day and reduced afterwards. Does were resting 31, 35 and 41 minutes per hour, and started one activity 67, 27 and 24 times per hour during 1st, 10th and 28th lactation days, respectively.
2011-02-11T12:27:02ZAnalysis of reproductive performances during the formation of a synthetic rabbit strainBrun, J.M.Baselga, M.https://riunet.upv.es:443/handle/10251/96992023-11-21T11:52:05Z2011-02-11T12:13:21ZAnalysis of reproductive performances during the formation of a synthetic rabbit strain
Brun, J.M.; Baselga, M.
[EN] In 1995, a synthetic rabbit strain ('2666') was formed at INRA for commercial meat purposesby crossing the INRA '2066' strain and the 'V' strain from the Polytechnical University of Valencia (Spain).The development of some reproductive traits and body weight at palpation of the '2666' does was studiedfrom the F1 (first generation cross) to the F4 generation in comparison with the 'V' does. This developmentwas quantified in terms of Dickerson's crossbreeding parameters. The base strains did not differ significantlyfor any of the studied traits, either overall or in their direct and maternal genetic value. F1 does exhibitedsignificant individual heterosis for body weight (5.5% of the parental average), pregnancy rate (13.3%),total born (18.3%), born alive (24.4%) and weaned (21.0%) per litter born. Concerning body weight, asignificant crossbred superiority over the 'V' line was retained in the F2 but not thereafter. The rate ofpregnancy showed no crossbred advantage from the F2 on. Concerning litter size traits, the benefit ofcrossbreeding was maintained until the F4, but at a lower magnitude than in the F1. Body weight andpregnancy rate exhibited maternal heterosis, while litter size did not. Direct epistatic losses were significantfor body weight, tended towards significance for pregnancy rate, but did not affect litter size. Overall, thecomparison between the synthetic strain and the founders was favourable to the synthetics.
2011-02-11T12:13:21ZEpizootic rabbit enteropathy. Study of early phenomena with fresh inoculum and attempt at inactivationCoudert, P.Licois, D.https://riunet.upv.es:443/handle/10251/96902023-11-21T11:52:05Z2011-02-11T11:39:11ZEpizootic rabbit enteropathy. Study of early phenomena with fresh inoculum and attempt at inactivation
Coudert, P.; Licois, D.
[EN] Using 180 35-day-old SPF rabbits, this study used the effectiveness of bacitracin as a tool for acquiring more information on the various phases of ERE, in particular during the hours inoculation. Five groups of animals were used, including 3 treatments with Bacivet S(R) (bacitracin) at different times from inoculation, with the standard inoculum TEC3. Three parameters were studied: growth, mortality and stomach noises (borborygmi). A significant fall in growth rate was observed during the first 18 hours following the inoculation in all the inoculated groups, both medicated and not medicated. Treatment with bacitracin eliminated mortality and borborygmi, but not the initial fall in growth rate. Treatment starting 18 hours after inoculation is less effective during the acute phase than the preventive treatment. With a preventive treatment interrupted as soon as 18 hours after inoculation, a delay of several days was observed before the appearance of the disease (fall in growth rate, manifestation of borborygmi) and total mortality was reduced. Very few pathogens can explain this early fall in growth rate. Bacitracin is an antibiotic which offers good control of the disease, and probably of the pathogen but not of the physio-pathological disturbances in the first few hours. The intervention of an exogenic toxin in the first hours of contamination seems likely. Borborygmi are important criteria. The intensity and/or frequency could be used as semi-quantitative criteria to characterize the disease and for the prognosis. In a simultaneous trial, a group was contaminated with the same inoculum, heated for 10 min at 55°C, in order to obtain more information on the type of pathogen involved in the etiology of ERE. This treatment did not modify the virulence of the inoculum.
2011-02-11T11:39:11ZRecommendations and guidelines for applied nutrition experiments in rabbitsFernández-Carmona, J.Blas, E.Pascual Amorós, Juan JoséMaertens, L.Gidenne, T.Xiccato, G.García, J.https://riunet.upv.es:443/handle/10251/96892023-11-21T11:52:05Z2011-02-11T11:30:14ZRecommendations and guidelines for applied nutrition experiments in rabbits
Fernández-Carmona, J.; Blas, E.; Pascual Amorós, Juan José; Maertens, L.; Gidenne, T.; Xiccato, G.; García, J.
[EN] The aim of this paper was to draw up a set of recommendations for applied nutrition and feeding trials with rabbits, in relation to certain aspects such as determining the nutritive value of raw materials or diets in growing or reproducing animals, studying digestive physiology and obtaining growth and reproduction parameters. We deal first with animals, size of the sample, housing conditions, diets, handling, measurements, and the data analyses relevant to the design of the experiment are described. Secondly, we give a list of recommended items and include some comments.
2011-02-11T11:30:14Z