Evaluation of growth performance, carcass quality and organoleptic indices of weaner rabbits fed two dietary protein levels with or without alligator pepper (Aframomum melegueta)

Abstract

Aframomum melegueta, a phyto-additive has been reported to have anti-oxidizing, anti-microbial, and flavor enhancing properties. The aim of this trial was to assess the efficacy of Aframomum melegueta in terms of growth performance, carcass quality and organoleptic indices of weaner rabbits (mixed breed and unsexed) fed two dietary protein levels with or without Aframomum melegueta seed meal (APSM). Six experimental diets were formulated such that diets A, B and C contained 18%CP and 0%, 0.1%, 0.2% APSM, respectively while diets D, E and F contained 16%CP with 0%, 0.1% and 0.2% APSM, respectively. Thirty-six weaner rabbits were allotted into the 6 dietary groups of 3 replicates each and two rabbits/replicate in a study lasting 8 weeks. Daily Weight Gain (DWG), Daily Feed Intake (DFI), Feed Conversion Ratio (FCR), carcass characteristics and sensory qualities were monitored. Data collected were analysed using a 2x3 factorial arrangement in a completely randomized design. Proximate composition of APSM on dry matter basis showed crude protein 6.39%, crude fat 7.10%, crude fibre 14.53%, ash 3.05% and nitrogen free extract 59.76%. The phytochemical constituents present are saponin 7.5%, tannin 0.021%, flavonoid 10.10% and alkaloids 1.70%. Findings showed that the main effects of protein levels and APSM did not elicit any significant differences (P>0.05) on DFI, DWG FCR and meat sensory attributes. Inclusion of APSM in rabbit diets caused a reduction in abdominal fat contents. Interaction between protein and inclusion levels of APSM did not reveal any significant variations except on apparent adhesion. In conclusion, the use of alligator pepper had no adverse effect on growth performance and carcass traits while 16% dietary protein level appeared better utilized compared to 18% in weaner rabbit diets.

Keywords: Alligator Pepper Seed Meal, Growth, Rabbit, Sensory Attributes.