Substituting starch with digestible fiber does not impact on health status or growth in restricted fed rabbits

Knudsen, Christelle; Combes, Sylvie; Briens, C.; Coutelet, Guillaume; Duperray, Joël; Rebours, G.; Salaun, Jean-Marc; Travel, Angélique; Weissman, Delphine; Gidenne, T.

doi:10.1016/j.anifeedsci.2017.01.002

Cited by 17 publications

(22 citation statements)

References 16 publications

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“…These results are consistent with the results of Tazzoli et al [20] who observed that final live weight and ADG significantly decreased with decreasing starch from 19.6% to 11.5% in rabbit diets, El-Tahan et al [21] reported that feeding a high starch diet (up to 22.11%) provided the best growth performance and digestibility coefficients in growing meat rabbits. The impairment of rabbit growth caused by feed restriction was enhanced when the dF/starch ratio was increased [22]. Although Xiccato et al [23] indicated that the dF/starch ratio (1.0 vs 2.5) did not affect the final live weight and ADG of hybrid rabbits.…”

Section: Effects Of Digestible Fiber-to-starch Ratio On Growth Of Angmentioning

confidence: 99%

Effects of the dietary digestible fiber-to-starch ratio on pellet quality, growth and cecal microbiota of Angora rabbits

Gao

Zhao

et al. 2020

Asian-Australas J Anim Sci

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Objective: Substituting starch with digestible fiber (dF) can improve digestive health of rabbits and reduce costs. Therefore, it is necessary to develop a criterion for dF and starch supply. Effects of the dietary dF-to-starch ratio on pellet quality, growth and cecal microbiota of Angora rabbits were evaluated.Methods: Five isoenergetic and isoproteic diets with increasing dF/starch ratios (0.59, 0.66, 0.71, 1.05, and 1.44) were formulated. A total of 120 Angora rabbits with an average live weight of 2.19 kg were randomly divided into five groups with four replicates. At the end of 40 day feeding trial, cecal digesta were collected to analyse microbiota.Results: The results showed that the dF/starch ratio had linear effects on pellet variables (p<0.01). When the dF/starch ratio was 1.44, the pellets had the lowest powder and highest durability. The dF/starch ratio had unfavorable linear effects on growth variables (p<0.001). When analyzed by quadratic regression, the optimal dF/starch ratios for average weight gain and feed/gain were 0.59 and 0.74, respectively. There were differences in wool yield, fiber length and fiber diameter caused by the dF/starch ratio (p<0.05), and the dF/starch ratios that ranged from 0.66 to 1.06 were appropriate for good results. The cecal microbiota operational taxonomic unit (OTU) number index in the 1.05 dF/starch treatment was higher than that in the 0.66 and 0.71 dF/starch treatments. The higher dF/starch ratio resulted in a higher cecal microbiota OTU number index (p<0.05). The proportion of <i>Ruminococcus</i> in the 0.71 dF/starch treatment was higher than that in the 0.59 dF/starch treatment (p<0.05)Conclusion: The most suitable dF/starch ratio for feed pellet quality is 1.44, and for rabbit growth the optimal range of ratios is from 0.59 to 0.74. With combination of the wool growth, output cost, and cecal microbiota, we suggest that a dietary dF/starch ratio ranging from 0.74 to 1.06 is optimal.

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Section: Effects Of Digestible Fiber-to-starch Ratio On Growth Of Angmentioning

confidence: 99%

Effects of the dietary digestible fiber-to-starch ratio on pellet quality, growth and cecal microbiota of Angora rabbits

Gao

Zhao

et al. 2020

Asian-Australas J Anim Sci

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“…During the restriction period the restriction level resulted higher in this experiment than that obtained by Birolo et al (2016) (72 vs. 92% of Ad libitum feeding) but when comparing the restriction level attained at similar ages (58-59 d) they were closer (86 vs. 92%), which resulted in similar mortality values, although it was not completely supressed. These results agree with the positive effect of feed restriction observed before Romero et al, 2010;Gidenne et al, 2012;Birolo et al, 2016;Alabiso et al, 2017;Knudsen et al, 2017), although there are other cases that did not show any effect (Knudsen et al, 2014;Birolo et al, 2017;Crespo et al, 2020) or even negative effects (Birolo et al, 2020). These wide range of response to feed restriction depends on many factors like the health status of the farm, type of diet provided and how the feed restriction is done.…”

Section: Influence Of Oligosaccharide Supplementation and Feed Restri...supporting

confidence: 85%

“…The latter and this study had important differences in the digestible protein content, the digestible protein/energy ratio, and the feed restriction plan, but shared the same methodology compared with other ways to evaluate nitrogen retention and losses (Birolo et al, 2016;Gidenne et al, 2017), which might be behind of these differences although other factors that differ among experiments might be implied. Feed restriction also reduced both the retained energy (Xiccato, 1999;Xiccato and Trocino, 2020;Gidenne et al, 2012;Knudsen et al, 2017) and the energetic losses, but had a minor or even no influence on the energetic balance in agreement with Crespo et al (2020). It might be explained by the greater penalization exerted by feed restriction of fat accretion compared with that of protein, and the slower rate of deposition of fat during the refeeding period compared with protein, together with the higher energetic efficiency observed for fat synthesis than for protein.…”

Section: Influence Of Oligosaccharide Supplementation and Feed Restri...mentioning

confidence: 97%

Effect of dietary soluble and insoluble fibre level, oligosaccharide supplementation and feed restriction on rabbit performance

Kovac¹

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permitirme seguir creciendo académicamente, por recordarme que nunca debemos dejar de ser alumnos, que mientras lo seamos es la única manera de comprender lo mucho que nos falta por aprender.De manera especial a mis profesores durantes estos años, a Rosa, Pilar y Dolores, pero en especial a mi tutor Javier, y a Nuria, por brindarme la oportunidad de realizar esta tesis doctoral, por todos sus consejos y enseñanzas, y por toda la paciencia que eso tuvo que haber significado.A mi padre Mario J. Farías D., porque considero que las metas no las alcanzamos en solitario, gracias por crear en mi, unas correctas fundaciones, basadas en la educación, esfuerzo y determinación. Gracias por proporcionarme las herramientas que conllevaron la obtención de este logro, por preocuparte en enseñarme que el mejor legado que podias darme se basaba en la educación, superación propia y determinación. No lo hiciste mal... Gracias nuevamente.A mis hermanos Mario J. Farías y Mario H. Farías, por enseñarme desde el ejemplo a alcanzar las metas. Porque desde hace ya muchos años, la admiración que me generan me ha servido de motor.A familiares especiales como Angela Farías y Dirimo Tineo, por actuar en su momento como segundos padres, porque no tenían que hacerlo, pero no dudaron.A todas los compañeros y colegas del Departamento de Produccion Agraria, con los que tuve la oportunidad de compartir durante varios años, que han compartido su conocimiento conmigo y que han hecho esta experiencia mas enriquecedora (

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“…Our data also show a reduction in the DoP of the animals on RF with respect to animals on FF but this reduction was not so clear in other studies (Crespo et al, 2020). When DoP is impaired in animals under RF, this reduction is normally associated with a larger size of the intestinal tract (Gidenne et al, 2009; Knudsen et al, 2017). It has been shown that a minimum length of the restriction period is required to observe an effect on carcass yield (Tůmová et al, 2006).…”

Section: Discussionmentioning

confidence: 99%

Genotype by feeding regimen interactions for slaughter traits in rabbit and expected responses under restricted and full feeding

Sánchez

Ragab

Mínguez

et al. 2022

J Animal Breeding Genetics

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The interaction between the genotype and feeding regimen (G×FR) for slaughter traits was estimated from data corresponding to 2557 animals under full (FF) and 2424 with restricted feeding (RF). Expected responses to selection under different scenario regarding feeding regimen were also calculated. Body weight at slaughter (SW), carcass weight (CW) and dressing out percentage (DoP) were analysed by using linear animal models in which records obtained under different feeding regimes were treated as different traits. Animals belonged to Caldes line, selected for average daily gain (G) under ad libitum feeding. The selection process information was included in the analyses. Marginal posterior mean of heritabilities were 0.102 for G, and 0.364, 0.257 and 0.167 for SW, CW and DoP under FF feeding. The corresponding values for animals fed on RF were 0.243, 0.203 and 0.379 for SW, CW and DoP, respectively. Genetic correlations between G and CW were positive and moderate, and those between G and DoP were low. The estimated genetic correlation between SW, CW and DoP under different feeding regimens were: 0.73, 0.69 and 0.87, respectively. These correlations cannot be said to be far enough from one to generate relevant G×FR interaction variance, which were estimated to be only 11.1%, 8.6% and 5.3% of the mean of the phenotypic variance for SW, CW and DoP, respectively. This lack of G×FR interaction variance, jointly with the higher heritability of DoP under RF, explains that the genetic improvement of DoP can be done more efficiently recording traits on animals under RF, even if the interest is on the performances under FF, i.e. by indirect selection.

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Substituting starch with digestible fiber does not impact on health status or growth in restricted fed rabbits

Cited by 17 publications

References 16 publications

Effects of the dietary digestible fiber-to-starch ratio on pellet quality, growth and cecal microbiota of Angora rabbits

Effects of the dietary digestible fiber-to-starch ratio on pellet quality, growth and cecal microbiota of Angora rabbits

Effect of dietary soluble and insoluble fibre level, oligosaccharide supplementation and feed restriction on rabbit performance

Genotype by feeding regimen interactions for slaughter traits in rabbit and expected responses under restricted and full feeding

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