F. Lebas
Institut national de la recherche agronomique
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Featured researches published by F. Lebas.
Archive | 2005
T. Gidenne; F. Lebas; Laurence Fortun-Lamothe
As a monogastric herbivore, the rabbit presents a unique feeding behaviour compared to other domestic animals, since he belongs to the Lagomorpha order (Leporidae family: rabbits and hares, Grasse and Dekeuser, 1955), and consequently possess a main specificity that is the caecotrophy. For recall (see details in chapter 1), the caecotrophy is a complete behaviour involving an excretion and an immediate consumption of specific faeces, named soft faeces or caecotrophes. Consequently, daily intake behaviour of the rabbit is constituted of two meals: feeds and caecotrophes. Although rabbit is not a rodent one of its main feeding behaviour features is to gnaw. The informations about the feeding behaviour have been mainly obtained on the domestic rabbit, either bred for meat or fur production, or as a laboratory animal. It basically involved rabbits receiving ad libitum a balanced complete pelleted feed, supplemented or not with dry forages or straw, but most generally without a real food free choice. Regulation of the intake behaviour will be reviewed according to several factors: age, type of feed, etc. The last part will be devoted to feeding behaviour of the wild rabbit and of domestic rabbits in situation of free choice.
Animal | 2008
M. Theau-Clément; F. Lebas; Jean-François Beckers; Pierre Drion
The aim of this experiment was to study the kinetics of anti-eCG (equine chorionic gonadotrophin) antibodies in relation to eCG dose (8 or 25 IU) and number of injections (n = 11) in comparison with a control group (no injection), and to relate antibody production to sexual receptivity and productivity of rabbit does. In all, 124 lactating primiparous rabbit does were inseminated every 35 days for a year. Just before eCG injection (48 h before insemination), blood samples were collected from all the does to assay anti-eCG antibodies. The anti-eCG antibody binding rate, regardless of the injected dose, shows that none of the does developed detectable anti-eCG antibodies before the 7th injection. The level of detectable anti-eCG antibodies began to show an increase at the 7th injection and was significant only for the 25 IU dose at the 11th injection. At the end of the experiment, 15% and 39% of does treated with 8 and 25 IU, respectively, developed immunity to eCG (binding rate >6%: higher binding rate of the control group). Consequently, the immune response depends on the eCG dose and on the number of injections. Moreover, productivity of does estimated from the number of weaned rabbits produced per insemination is not influenced by the level of eCG antibodies (7.0 and 6.9 for binding rate <6% and binding rate 6%, respectively). Only 19 inseminations (n = 6 and n = 13 for 8 and 25 IU, respectively) were made on hyperimmune does. Consequently, the immune response to eCG seems to be marginal for rabbit does. Moreover, under the described experimental conditions, reproductive performances of hyperimmune does were not affected.
Nutrition of the rabbit | 2010
F. Lebas; R. G. Thébault; D. Allain; C. de Blas; J. Wiseman
The Angora rabbit produces 1.0–1.4 kg year−1 of pure fine animal fibre without grease or plant material contamination, named ‘Angora wool’. This represents some 0.30 of its live weight, the highest keratin production to live-weight ratio found in any fibre-producing animal. In sheep, goat or camelids, this figure is generally <0.10. The capacity of the Angora rabbit to convert food to keratin requires that particular attention be given to its nutrition. There are two important nutritional objectives:
World Rabbit Science | 2010
Pérez J.M; F. Lebas; T. Gidenne; L. Maertens; Gerolamo Xiccato; R. Parigi-Bini; A. Dalle Zotte
Nutrition of the rabbit | 2010
T. Gidenne; Javier García; F. Lebas; D. Licois; C. de Blas; J. Wiseman
Nutrition of the rabbit | 2010
T. Gidenne; F. Lebas; L. Fortun-Lamothe; C. de Blas; J. Wiseman
World Rabbit Science | 2010
F. Lebas; Michèle Theau-Clément; Benoit Remy; Pierre Drion; Jean-François Beckers
World Rabbit Science | 2010
D. Lakabi-Ioualitene; G. Lounaouci-Ouyed; M. Berchiche; F. Lebas; Laurence Fortun-Lamothe
World Rabbit Science | 2010
M. Theau-Clément; F. Lebas
World Rabbit Science | 2010
F. Lebas; B Lamboley