World Rabbit Science - Vol. 08 (1)-2000
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- MEAT QUALITY AND CAECAL CONTENT CHARACTERISTICS OF RABBIT ACCORDING TO DIETARY CONTENT AND BOTANICAL ORIGIN OF STARCH
- SHORT TERM ACUTE HEAT STRESS IN RABBITS: FUNCTIONAL, METABOLIC AND IMMUNOLOGICAL EFFECTS
- EFFECT OF BIRTH WEIGHT AND LITTER SIZE ON GROWTH AND MORTALITY IN RABBITS
- RECENT ADVANCES IN RABBIT NUTRITION : EMPHASIS ON FIBRE REQUIREMENTS. A REVIEW.
- EFFECTS OF CONCURRENT PREGNANCY AND LACTATION IN RABBIT DOES ON THE GROWTH OF FOLLICLES IN DAUGHTERS' OVARIES
- TECHNICAL NOTE : THE MEASUREMENT OF SOFT FAECES PRODUCTION IS AFFECTED BY THE TYPE OF COLLAR
- Abstracts of papers presented during the First International Conference on indigenous versus acclimatized rabbits.
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- PublicationRECENT ADVANCES IN RABBIT NUTRITION : EMPHASIS ON FIBRE REQUIREMENTS. A REVIEW(World Rabbit Science. ICTA. UPV, 2000) GlDENNE, T.[EN] The rabblt meat production knew deep modifications during the ten last years, on the techniques of breeding as well as on the genetic potentialities of growth or reproduction. The techniques of feeding (adapted feed formulation etc.) also strongly progressed, in arder to obtain a better adjustment of feeds to the animals needs, e.g. according to their physiological stage. This paper summarised the recent advances and perspectives, which we consider significan! in the field of the nutrition of growing rabbits and reproductive females. Particular attention will be devoted to the dietary fibre definition and requirements and to the relationship with digestive pathology, as mortality by diarrhoea is still a majar question in rabbit breeding.
- PublicationTECHNICAL NOTE : THE MEASUREMENT OF SOFT FAECES PRODUCTION IS AFFECTED BY THE TYPE OF COLLAR(World Rabbit Science. ICTA. UPV, 2000) Gidenne, T.; Lapanouse, A.[EN] The present study aimed to compare two types of plastic collar, either a rigid and flat one or a flexible and conical one, for collecting soft faeces. Measurements were performed in two successive series (separated by 5 days) on a group of 1 O hybrid adult rabbits (mean live weight = 3590 g) fed ad libitum a commercial pelleted die! . Rabbits equipped with a flat collar showed a slightly higher (not significan!) feed intake, and a higher hard faeces excretion (+ 10%). The quantity of soft faeces collected was 20% higher (P=0.05) in rabbits wearing a flat collar, compared to a conical one (resp. 28.2 vs 22.0 g dry matter/day). The use of a flat and rigid collar instead of a flexible one is recommended to obtain a more accurate total collection of soft faeces in adult rabbit.
- PublicationEFFECTS OF CONCURRENT PREGNANCY AND LACTATION IN RABBIT DOES ON THE GROWTH OF FOLLICLES IN DAUGHTERS' OVARIES(World Rabbit Science. ICTA. UPV, 2000) Fortun-Lamothe, L.; Powers, S.; Collet, A.; Read, K.; Mariana, J.C.[EN] The aim of this experiment was to study the effects of concurren! pregnancy and lactation in the mother on follicular development in daughter rabbits. Young females from mothers lactating (group PL) or not (group P) during gestation were sacrificed on days 29 (nPL = np =5), 49 (nPL = np =5) or 70 (nPL = 4, np = 5) and one ovary was taken from each. Follicles were divided into size bands according to their diameter. The P and PL group counts in each band were similar at 29 and 49 days, but at 70 days the number of larger growing follicles (diameter > 241 μm) was lower in the PL !han in the P does (83 vs. 155; P<0.05). A mathematical model for follicular development was fitted to the size-class frequencies for animals in both groups and showed that the duration of the first growth phase was longer in the PL !han in the P group (26.6 days vs. 14.9 days; P<0.001 ). These results suggest that concurren! lactation during pregnancy in primiparous does significantly affects early follicular development and delays the appearance of larger ovarian follicles in the daughters.
- PublicationAbstracts of papers presented during the First International Conference on indigenous versus acclimatized rabbits: El Arish- North Sinai, Egypt, 7-9 September 1999(World Rabbit Science. ICTA. UPV, 2000) World Rabbit Science
- PublicationMEAT QUALITY AND CAECAL CONTENT CHARACTERISTICS OF RABBIT ACCORDING TO DIETARY CONTENT AND BOTANICAL ORIGIN OF STARCH(World Rabbit Science. ICTA. UPV, 2000) Nizza, A.; Moniello, G.[EN] The research was carried out to study the influence of diets differing in contents and botanical origin of starch on fattening and slaughtering performance of rabbits. Four pelleted diets (LSM, LSW, HSM, HSW) were prepared according to a 2 X 2 factorial scheme: two starch contents (23 vs 28% DM) and two botanical origins (wheat vs maize). Before being slaughtered, 4 groups of 24 Hyla hybrid male rabbits from 50 to 90 days of age were fed ad libitum on the above diets. High starch diets decreased the feed intake (g 104.1 vs 111.5 ; P < 0.05 and g 109.8 vs 123.6 ; P < 0.01, respectively for periods of 51-70 d and 71-90 d) and determined a more favourable (P< 0.05) feed conversion (2.729 vs 3.071 and 3.801 vs 4.020 respectively for periods of 51-70 d and 71-90 d). In the first period (51-70 d), the liveweight gain showed an importan! trend (P = 0.16) for LS groups in comparison to HS groups (g 38.1 vs 36.3). An opposite trend was shown in the period of 71-90 d (g 28.9 vs 30.7 for groups HS and LS, respectively). In fact, liveweight at 90 d was similar (g 2755 vs 2757 for groups LS and HS, respectively) in the groups feeding different starch levels. The diets did not significantly affect slaughtering yields (hot carcass weight g 1705 vs 1714 and reference carcass weight g 1352 vs 1352 for groups LS and HS, respectively), chemical and nutritional characteristics of meat (crude protein 22.3% vs 22.2 and ether extrae! 3.0% vs 3.1 for groups LS and HS, respectively), and acidic composition of intramuscular fat. No significan! differences were observed in the caecal content parameters (VFA mml/I 66.5 vs 66.4 for groups LS and HS, respectively), except for a lower caecal starch level (1.6% vs 2.0% DM ; P < 0.05) in the group fed the diet with wheat and 23% of starch. No other botanical effect was significan!.
- PublicationSHORT TERM ACUTE HEAT STRESS IN RABBITS: FUNCTIONAL, METABOLIC AND IMMUNOLOGICAL EFFECTS(World Rabbit Science. ICTA. UPV, 2000) Amici, A.; Franci, O.; Mastroiacono, P.; Merendino, N.; Nardini, M.; Tomassi, G.[EN] Sixteen male New Zealand White rabbits (NZW) accustomed to an environmental temperature of 18.0 ± 0.5 ºC , and relative humidity of 45 ± 4% were placed in a climatic chamber for 1 hour at 42 ºC with r.h. maintained at 45 ± 4%. Feed consumption, rectal temperature and body weight were registered individually for five days before and five days after the heat stress. Blood samples were collected befare the exposition to the stress temperature, and at 0.5 h, 6 h, 30 h and 54 h after the end of exposure to stress. Plasma and peripheral blood mononuclear cells (PBMC) were prepared. Glucose, urea, total cholesterol and triglycerides concentration, GOT and GPT activities were measured on plasma samples together with vitamin C, vitamin E, SH-groups and TRAP levels. PBMC proliferative response and immunoglobulin synthesis were measured through ¡3H]-thymidine incorporation and competitive Elisa assay, respectively. The results showed that exposure to high temperature induced a feed intake reduction lasting 5 days. Concerning plasma metabolic parameters, glucose decreased throughout the entire observation period, cholesterol decreased at 36 hours, triglycerides and urea increased at 0·5 hours after stress. Transaminases activity, Vitamin C, sulphydril groups and total radical-trapping antioxidant capability increased in the first hours following stress. lmmune cell proliferation and immunoglobulins synthesis were reduced at 0·5 hours after submission to stress.
- PublicationEFFECT OF BIRTH WEIGHT AND LITTER SIZE ON GROWTH AND MORTALITY IN RABBITS(World Rabbit Science. ICTA. UPV, 2000) Poigner, J.; Szendrõ, Zs.; Lévai, A.; Radnai, I.; Biró-Németh, E.[EN] Two experiments were performed with Pannon White rabbits. In the first experiment 50 litters were formed with 6, 8 or 1 O rabbits of different birth weight in equal ratios (n = 380, between 39 and 70g). In the second experiment 60 litters of 6, 8 or 1 O rabbits were formed (n = 456), each litter consisting of rabbits of a single weight group only (small: 39 to 43g; medium: 53 to 56 g; large: 63 to 70 g). With increasing birth weight and decreasing litter size, mortality in the suckling rabbits decreased and daily weight gain of kits and weight of rabbits up to 1 O weeks of age increased significantly. These effects were weaker in experiment 2. In the extreme groups used in the experiments (1 O small kits and 6 large kits) the following results were obtained : mortality between birth and 21 days was 35.3 and 8.1 % in experiment 1 and 18.0 and 5.6 % in experiment 2, daily weight gain of kits between birth and 21 days was 9.2 and 18.5 g in experiment 1 and 10.8 and 16. 7 g in experiment 2, and body weight at 1 O weeks of age was 1.90 and 2.58 kg in experiment 1 and 2.11 and 2.45 kg in experiment 2. In conclusion, intra-litter homogenisation of birth weight markedly reduced mortality in small rabbits and standard deviation in live weight within litters.