Effect of dietary fibre and fat content on the reproductive performance of rabbit does bred at two remating times during two seasons

G. Barreto, J.C. de Blas

Abstract

One hundred and forty one rabbit does were used to study the effect of four diets differing in energy concentration (8.92 to 11.86 MJ DE/kg), fibre and fat content, two parturition-remating intervals (1 or 9 d), and two seasons (hot season and rest of the year) on productiva performance throughout a 18 months period. Addition of a 3.5 % of pork lard to a diet containing 18 % ADF implied an increase of energy digestibility (by 8 %, P<0.05), DE content (by 15 %, P<0.001), feed intake (by 6 %, P<0.1), and DE intake (by 22.5 %, P<0.05). Fat addition did not affect average weight of does, prolificacy, or replacement rate, but improved fertility (by 7%, P<0.1), weaning weight per pyp (by 3%, P<0.1), and numerical proauct1víty per cage and year (by 12 %, P<0.05). An increase of dietary fibre content (from 18.0 to 23.8 % ADF) decreased linearly (P<0.001) energy digestibility, and DE content, but increased (P<0.05) feed intake, so that neither DE intake (2.56 MJ/d as average) or does productivity were significantly affected. lntensification of reproduction system elicited a shorter parturition interval (- 3.2 days, P<0.05), but also a decrease of average does weight (- 0.14 kg, P<0.05), a lower conception rate (P<0.05), and a higher pup mortality, so that numerical productivity per cage and year was not significantly affected by treatment. The increase of temperatura during the hot season decreased feed intake (by 21 %, P<0.001), average weight of does (- 0.15 kg, P<0.05), fertility (- 16 %, P<0.001), numerical productivity (- 23 %, P<0.001), and weaning weight (- 7 %, P<0.01). No significant effects of the interactions diet x remating interval or diet x season were found on any of the variables studied.


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World Rabbit Science  vol: 3  issue: 1  year: 2010  
doi: 10.4995/wrs.1995.235



 

 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