Apports de cellulose dans l'alimentation du lapin en croissance. II. Conséquences sur les performances et la mortalité

Pérez, J. Iglesias; Gidenne, T.; Bouvarel, Isabelle; Arveux, P.; Bourdillon, A.; Briens, C.; Naour, J Le; Messager, B.; Mirabito, L.; Lamboley, Béatrice; Troislouches, G; H, Rouillere; Fourmont, P; Bourgin, B

doi:10.1051/animres:19960402

Cited by 25 publications

(13 citation statements)

References 2 publications

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“…unfavourable effect of a high starch/DF ratio was associated with a rise in mortality observed during this period. Similarly, in previous studies on fibre supply [16,17,18], the post-weaning period corresponded to a strong expression of the growth potential and also to an increased sensitivity to the breeding and feeding conditions. The reduction of growth was thus probably the consequence of a more precarious health status of rabbits consuming the diets rich in starch (or lowest in DF), since we did not exclude any animals with abnormal weight gain.…”

Section: Discussionsupporting

confidence: 73%

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Replacement of digestible fibre by starch in the diet of the growing rabbit. II. Effects on performances and mortality by diarrhoea

Pérez¹,

Gidenne²,

Bouvarel

et al. 2000

Ann. Zootech.

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-The effects of the level of dietary starch on growth performance and mortality were studied in six experimental sites on 2 328 growing rabbits (582 per diet). Four iso-lignocellulosic (ADF) diets (A12, A16, A20, A24) with increasing starch content (12, 16, 20, 24%) instead of digestible fibre (hemicelluloses and pectins) were compared. Diets were given ad libitum from weaning (28 and 35 d old, depending on the site) to slaughter (between 68 and 71 d old). The increase (12 points) of dietary starch level led to a double-rise of mortality rate by digestive disturbances: 4.6% and 10.1% respectively for A12 and A24 for the whole period. In parallel, the feed conversion ratio decreased slightly but significantly by 0.15 point between A12 and A24. The feed intake and the digestible energy intake was respectively reduced by only 4.5% and by 1.5% (P < 0.01), between the A12 and A24 diets. During the whole period the growth rate remained similar for the four diets (mean = 42.5 g . d -1 ). To ensure digestive security of the growing rabbit, it is recommended to maintain a dietary starch level below 14% during the post-weaning period, while for the end-fattening period dietary starch could reach 18%. rabbit / feeding / starch / fibre / growth / diarrhoea / mortality

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Section: Discussionsupporting

confidence: 73%

“…Several studies have shown the favourable role of the lignocellulosic fraction on the mortality of fattening rabbits [2,15] and have quantified the needs for the components of lignocellulose itself by analysing the respective effects of lignins and cellulose [6,7,9,16,17].…”

Section: Introductionmentioning

confidence: 99%

Replacement of digestible fibre by starch in the diet of the growing rabbit. II. Effects on performances and mortality by diarrhoea

Pérez¹,

Gidenne²,

Bouvarel

et al. 2000

Ann. Zootech.

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“…The post-weaning period corresponded to a strong expression of the growth potential (growth rate close to 50 g·d -1 ). It also corresponds to an increased sensitivity to the breeding conditions and to digestive troubles, since the mortality by non-specific enteropathy was higher after weaning compared to the finishing period, as reported in previous studies on fibre supply [10][11][12].…”

Section: Discussionsupporting

confidence: 70%

Effect of cereal sources and processing in diets for the growing rabbit. II. Effects on performances and mortality by enteropathy

Gidenne¹,

Jehl

Pérez

et al. 2005

Anim. Res.

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-The effects of the quality of the dietary starch on growth performance and mortality were studied on five experimental sites on 1784 growing rabbits (446 per diet). Four iso-fibre diets varying in starch nature (W-wheat, B-barley, M-maize, EM-Extruded maize) were compared. The diets were given ad libitum from weaning (30 to 35 d. of age, depending on the site) to slaughter (68 to 71 d). From weaning to 49 days of age, the weight gain did not differ significantly according to the starch source (mean = 48.6 g·d -1 on average). The feed intake was higher for the M diet compared to the other three diets (+5%, P < 0.01). During the finishing period (49 d to slaughter), the weight gain was significantly higher for the EM diet compared to the W or B diets (+2%). The feed consumption was 5% higher (P < 0.01) for the M diet, compared to other treatments. Thus, feed conversion was the worst for the M diet, while it was the lowest for the EM diet. During the whole fattening period, the weight gain was only slightly higher with extruded maize feed, compared to the others (meanly +0.8 g·d -1 ). Correlatively, feed intake and conversion index were significantly lower for the EM diet, while they were the highest for the M diet (-2 to -4% compared to B and W diets). On the five experimental sites, mortality was always caused by acute digestive disorders, without specific pathology. The mortality rate due to diarrhoea greatly varied among sites (between 1.7 and 19.4%). The mortality rate between weaning and 49 days of age and during the finishing period was not affected by the dietary starch origin. However, the mortality in the W group was 3 points lower than in the M group (P = 0.07). . Du sevrage à 49 jours d'âge, la vitesse de croissance a été élevée et n'a pas différé significativement entre les 4 traitements (en moyenne = 48.6 g·j -1 ). L'ingestion d'aliment a été plus élevée pour le régime M (+5 %, P < 0,01). En période de fin d'engraissement (49 j à abattage), la vitesse de croissance a été plus rapide pour le régime EM, comparée aux régimes "Blé" ou "Orge" (+2 %). L'aliment à base de maïs a présenté le niveau d'ingestion le plus élevé (+5 %, P < 0,01), et aussi l'indice de consommation le plus haut, tandis que le régime EM a présenté la conversion alimentaire la plus efficace. Durant la totalité de la période de croissance, la vitesse de croissance a été seulement légèrement plus élevée pour le groupe EM (en moyenne +0,8 g·j -1 par rapport aux trois autres groupes), tandis que l'ingestion et l'indice de consommation ont été les plus faibles (-2 à -4 % respectivement comparé aux groupes B et W). Sur les 5 sites expérimentaux la mortalité a toujours été causée par une diarrhée aiguë, sans pathologie spécifique identifiable. Le taux de mortalité par diarrhée a beaucoup varié selon le site (entre 1,7 et 19,4 %). La mortalité post-sevrage ou en fin de croissance ne varie pas significativement en fonction des traitements. Cependant, on peut remarquer un taux de mortalité inférieur de 3 points pour le groupe B par ra...

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“…This is in agreement with results of Morisse [22] showing that the mortality rate is inversely related to the weight of rabbits at weaning. On the contrary, Perez et al [26,27] and Rémois et al [30] observed no effects of weaning weight on mortality during the fattening period. Besides, we cannot exclude the possibility of a harmful impact of the lower milk intake in rabbits with a large litter size on mortality.…”

Section: Resultsmentioning

confidence: 96%

The effects of size of suckled litter on intake behaviour, performance and health status of young and reproducing rabbits

Fortun-Lamothe¹,

Gidenne²

2000

Ann. Zootech.

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-We compared feed intake, performance and health status of females and their young reared in litters of 4 (group L4; n = 18) or 10 kits (group L10; n = 20) between 16 and 32 days of age. Between days 16 and 25, the individual milk intake was lower (-15.7%; P = 0.08) and the solid feed intake per kit was higher (+117%; P < 0.01) for the L10 than for the L4 litters. Between days 26 and 32 (weaning), milk and solid feed intake were similar among groups. Live weight of the young was 10% lower in the L10 than in the L4 group at weaning (P < 0.05) but was similar in both groups at 70 days of age. Mortality rate around weaning (16-42 days) was higher in the L10 than in the L4 group (29% vs. 17%; P < 0.05). Thirty-five days after parturition (day of slaughter), females showed a body condition and reproductive performance (conception rate, ovulation rate and litter size) which were similar in both groups, except for the weight of adipose tissues which was 35.8% lower in the L10 females (P < 0.01). These results suggest that the growth and survival of young rabbits are weaker if the rabbits are reared in large-sized litters in spite of an earlier and higher solid food ingestion which only partially compensates for the low milk availability.

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Apports de cellulose dans l'alimentation du lapin en croissance. II. Conséquences sur les performances et la mortalité

Cited by 25 publications

References 2 publications

Replacement of digestible fibre by starch in the diet of the growing rabbit. II. Effects on performances and mortality by diarrhoea

Replacement of digestible fibre by starch in the diet of the growing rabbit. II. Effects on performances and mortality by diarrhoea

Effect of cereal sources and processing in diets for the growing rabbit. II. Effects on performances and mortality by enteropathy

The effects of size of suckled litter on intake behaviour, performance and health status of young and reproducing rabbits

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