Length of collection period and number of rabbits in digestibility assays

 María J. Villamide, María A. Ramos

Abstract

The purpose of this work is to evaluate the influence of the methodology used (number of animals and length of the experiment) on the variability of digestibility coefficients, in order to propose a working guide line for these assays on rabbits. Seventeen New Zealand x Californian growing rabbits were fed a commercial diet ad libitum. After an adaptation period of 7 days, food intake and excreta were recordad daily and in periods of 2, 3 up to 1 O consecutiva days in order to determine dry matter digestibility (DMD). Variabilities of DMD coefficients among animals and among periods were studied. The variance due to animals decreased with the number of days of the collection period up to 4-day periods and then it almost stabilized. The variance due to periods followed the same pattern. Comparing these two variances it can be noted that for 1-day periods the variance due to animals was similar (only 1.11 times higher) to that due to periods, but for 4 or 5-day periods this ratio increased (2.06 and 2.63 respectively). The number of animals necessary to detect significant differences (P<0.05) of 2 points between mean values of DMD was 1 O rabbits for collection periods of 4 days, 8 rabbits for 7 days, or 7 rabbits for 1 O days. Despite the residual effects, the correlation between DM ingested/DM excretad the same day was higher (0.939) than between DM ingested one day/DM excretad the day after (0.873). The feed intake and the growth rate measured in the adaptation period had a moderate correlation (- 0.54 and - 0.48, respectively) with the DMD.



Full Text:

PDF

References

AUXILIA M.T., MASOERO G., 1980. Emploi du maïs­fourrage deshydraté dans l'alimentation des lapins. In : Proc. II World Rabbit Congr., Barcelona, Vol. 2, 147-156.

BLAS E., FANDO J.C., CERVERA C., GIDENNE T., PEREZ J.M., 1991. Effet de la nature de l'amidon sur l'utilisation digestive de la ration chez le lapin au cours de la croissance. 5th Jour. Rech. Cunicole, com. n º 50. Paris.

DESSIMONI R., 1984. Efecto de razas de diferentes niveles de proteína y fibra sobre la digestibilidad de nutrientes de raciones para conejos en crecimiento. Proc. III World Rabbit Congr., Rome, vol. 1, 314-322.

EVANS E., JEBELIAN v., 1982. Effects of age upon nutrient digestibility by fryer rabbits. J. Appl. Rabbit Res., 5, 8-9.

FERNANDEZ C., 1993. Efecto de la incorporación de grasa en piensos fibrosos sobre la utilización digestiva de la dieta crecimiento y calidad de la canal de conejos en cebo. PhD. Tesis. U. P., Madrid.

FRAGA Maria J., PEREZ DE AYALA P. CARABANO Rosa, DEBLAS J.C., 1991. Effect of type of fiber on the rate of passage and the contribution of soft feces to nutrient intake of finishing rabbits. J. Anim. Sci., 69, 1566-1574. https://doi.org/10.2527/1991.6941566x

LEBAS F., 1973. Variation, chez le lapin, des coefficients d'utilisation digestive de la matiere seche, de la matiere organique et de l'azote en fonction de l'age, de la race et du sexe.Ann. Biol. Anim. Bioch. Biopys., 13, 767-768 (abstract). https://doi.org/10.1051/rnd:19730438

LEBAS F., LAPLACE J.P., 1977. Le transit digestif chez le lapin. VIII, Influence de la source de cellulose. Ann. Zootech., 26, 575-584. https://doi.org/10.1051/animres:19770409

LEDIN l., 1984. Effect of restricted feeding and realimentation on compensatory growth, carcass composition and organ growth in rabbit. Ann. Zootech., 33, 33-50. https://doi.org/10.1051/animres:19840103

MAERTENS L., DE GROOTE G., 1982. Etude de la variabilité des coefficients de digestibilité des lapins suite aux différences d'age, de sexe, de race et d'origine. Rev. Agric., 35, 2787-2797.

MAERTENS L., LEBAS F., 1989. Energy evaluation of rabbit feeds and feedstuffs. A critical approach. Cuni-Sciences, 5 (2), 35-46.

MEAD R, CURNOW R.N., 1983. Statistical methods in agriculture and experimental biology. Chapman and Hall, New-York. https://doi.org/10.1007/978-1-4899-2951-8

PARTRIDGE G., 1980. The effect of ages on fibre digestion in the rabbits. In : Proc. II World Rabbit Congr., Barcelona, vol. 2, 29-36. https://doi.org/10.1051/animres:19800409

PROCEEDING V WORLD RABBIT CONGRESS, OREGON, 1992. Vol. B, 889-1343.

SAS., 1986. SAS User's Guide : Statistics. SAS Inst., Cary, N.C., USA.

VILLAMIDE Maria J., FRAGA Maria J., DEBLAS J.C., 1991. Effect of type of basal diet and rate of inclusion on the evaluation of protein concentrates with rabbits. Anim. Prod., 52, 215-224. https://doi.org/10.1017/S0003356100005869

XICCATO G., CINETTO M., 1988. Effect of nutritive level and of age on feed digestibility and nitrogen balance in rabbit. In : Proc. IV World Rabbit Congr, Budapest, vol. 3, 96-104.

XICCATO G., CINETTO M., DALLE ZOTTE A., 1992. Effeto del livello nutritivo e della categoria di conigli sull'efficienza digestiva e sul bilancio azotato. Zoot. Nutr. Anim., 18, 35-43.

Abstract Views

1030
Metrics Loading ...

Metrics powered by PLOS ALM


 

Cited-By (articles included in Crossref)

This journal is a Crossref Cited-by Linking member. This list shows the references that citing the article automatically, if there are. For more information about the system please visit Crossref site

1. EUROPEAN RING-TEST ON IN VIVO DETERMINATION OF DIGESTIBILITY IN RABBITS : REPRODUCIBILITY OF A REFERENCE METHOD IN COMPARISON WITH DOMESTIC LABORATORY PROCEDURES
  Pérez J.M., Cervera C., Falcao e Cunha L., Maertens L., Villamide M.J., Xiccato G.
World Rabbit Science  vol: 3  issue: 4  year: 2010  
doi: 10.4995/wrs.1995.259



 

 Universitat Politècnica de València

 

Official journal of the World Rabbit Science Association (WRSA)

 

e-ISSN: 1989-8886     ISSN: 1257-5011   https://doi.org/10.4995/wrs