Allométrie De Croissance Chez Le Lapin (Oryctolagus Cuniculus). I. — Principaux Organes Et Tissus

Cantier, J.; Vezinhet, A.; Rouvier, R.; Dauzier, L; Bouthier, E.; Bressot, Christophe; Paolantonacci, Suzanne; Scheller, Marie-Claude

doi:10.1051/rnd:19690101

Cited by 52 publications

(50 citation statements)

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“…Slaughtering the rabbits at the same bodyweight, later matured larger sized breeds or lines have poorer dressing out percentage than that of the smaller sized ones (Lukefahr et al, 1982;Maertens, 1992;Gómez et al, 1998;Dalle Zotte and Ouhayoun, 1998). This is partly due to the different growth rate of tissues and organs (Cantier et al, 1969;Deltoro and López, 1985). The skeleton and digestive tract mature earlier, the intensive growth of muscle starts later and fat is the latest.…”

Section: Discussionmentioning

confidence: 99%

“…In our experiments, the ratio of the fore part changed in agreement with the literature, since it was higher in rabbits from larger sized hybrid bucks in all cases. This could be explained by the fact that the fore part is the most bony part of the carcass and the bone is an early matured tissue (Cantier et al, 1969;Deltoro and López, 1985).…”

Section: Discussionmentioning

confidence: 99%

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A study of the carcass traits of different rabbit genotypes

Metzger¹,

Odermatt²,

Szendrő³

et al. 2010

World rabbit sci.

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ABSTRACT:The aim of this experiment was to study the carcass traits of rabbits when the same maternal stocks were mated with bucks of two well-known hybrids selected for growth traits or with Pannon White bucks selected for carcass traits by CT (computerised tomography). Three experiments were carried out at the same time. Experiment 1: Pannon White (P) or Hycole terminal (H) males were crossed with Pannon White (P) does (n = PP: 60, HP: 59). Experiment 2: Pannon White (P), Hycole terminal (H) or Zika terminal (Z) bucks were crossed with Hycole (H) parent does (n = PH: 60, HH: 52 and ZH: 58). Experiment 3: Pannon White (P) or Zika terminal (Z) males were crossed with a Maternal line (M) stock (n = PM: 60, ZM: 58). In all the experiments, hybrid males increased their body weight. Mating the same maternal stock with hybrid or Pannon White bucks, the body weight of the offspring of hybrid males was higher than that of the offspring of Pannon White bucks (Experiment 1: PP and HP: 2644 and 2758 g, P<0.001; Experiment 2: PH, HH and ZH: 2611, 2671 and 2890g, P<0.001; Experiment 3: PM and ZM: 2534 and 2677 g, P<0.001). The most important carcass traits differences were found in rabbits originated from Pannon White males. Genetic origin influenced the dressing out percentage, which was 0.5% higher in PP rabbits compared to the HP group in Experiment 1 (60.6 and 60.1%, resp.; P=0.092); 1% higher in PH and ZH genotypes compared to HH animals in Experiment 2 (in PH, ZH and HH: 59.6, 59.7 and 58.7%; P=0.008), and 1.5% higher in PM than in ZM rabbits in Experiment 3 (61.0 and 59.5%, resp.; P<0.001). The ratio of the m. Longissimus dorsi to reference carcass weight was also higher in rabbits derived from P males in Experiments 2 and 3 (Experiment 2: PH: 11.2, HH: 10.8, ZH: 10.5%, P<0.001; Experiment 3: PM: 11.5, ZM: 10.6%, P<0.001), while it did not differ in Experiment 1. Significant difference in fat deposit was found only in Experiment 3, progeny of Pannon White males had higher weight (22.3 vs. 16.6g, P=0.002) and ratio of perirenal fat (1.65 vs. 1.25%, P=0.003) compared to offspring of Z males. Results of the dressing out percentage and the ratio of m. Longissimus dorsi proved that the selection based on CT (Pannon White genotype) was successful.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

A study of the carcass traits of different rabbit genotypes

Metzger¹,

Odermatt²,

Szendrő³

et al. 2010

World rabbit sci.

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“…Organ development, slaughter yield and carcass characteristics In parallel with a post-weaning growth reduction, a restriction strategy also modifies the body composition. According to the general rule of tissues' allometry deposition (Cantier et al, 1969;Dalle Zotte and Ouhayoun, 1998), the restriction leads to differential changes in growth for the internal organs (liver, digestive tract, etc.) and tissues (muscles, fat, etc.).…”

Section: Limiting Feed Intake After Weaning: Different Strategies Formentioning

confidence: 99%

Feed intake limitation strategies for the growing rabbit: effect on feeding behaviour, welfare, performance, digestive physiology and health: a review

Gidenne

Combes

Fortun-Lamothe

2012

Animal

137

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This review aims to present the different effects produced by a post-weaning intake limitation strategy on the growing rabbit, now largely used by French professional rabbit breeders. Although a quantitative feed restriction leads to slower growth, feed conversion (FC) is improved, particularly when the rabbits are again fed freely, as compensatory growth occurs. This better FC or the healthy rabbit is because of better digestion resulting from slower passage through the intestine, whereas the digestive physiology is slightly modified (morphometry of the intestinal mucosa, fermentation pattern, microbiota). Meat quality and carcass characteristics are not greatly affected by feed restriction, except for a lower dressing-out percentage. One of the main advantages of limiting post-weaning intake of the rabbit is to reduce the mortality and morbidity rate due to digestive disorders (particularly epizootic rabbit enteropathy syndrome). The consequences for animal welfare are debatable, as feed restriction probably leads to hunger, but it reduces the incidence of digestive troubles after weaning. However, the growing rabbit adapts very well to an intake limitation strategy, without any aggressive behaviour for congener. In conclusion, restriction strategies could improve profitability of rabbit breeding, but they should be adapted to any specific breeding situation, according to the national market, feed prices, etc.

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“…:ans cette espèce, l'évolution de la composition en acides gras des lipides ce; gorets au cours de la croissance lorsque l'aliment est exempt de lipides. Le (Cantier et al, 1969). L'échantillonnage de tissu musculaire porte sur l'homogénat des muscles du membre postérieur débarrassés, le cas échéant, des filets adipeux intermusculaires.…”

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