Entomophagous Response of Albino Rats to Cockroach (Periplaneta Americana) Meal

Abstract

An experiment was conducted to determine the nutrient composition and effects of cockroach (Periplaneta americana) meal on the growth performance, economics of production and the absolute and relative weights of some internal organs of albino rats. Twelve (12) male albino rats with an average weight of 67.5g were randomly allotted three dietary treatments: T0 with no cockroach meal, and T1 and T2 with 2% and 4% cockroach meal respectively in a Randomised Complete Block Design (RCBD). Each treatment had four rats and each rat served as a replicate. Feed and water were provided ad libitum. The rats were euthanized and their internal organs were weighed at the end of a 28-day feeding trial. Data obtained were analysed using the analysis of variance procedure of the GenStat Statistical Package version 11.1. There were no significant differences in feed intake (P = 0.633), average daily gain (ADG)(P = 0.670) and feed conversion ratio (FCR)(P = 0.326) for the various treatments. The FCR figures recorded for T0, T1 and T2 were 4.81, 4.37 and 4.17 respectively whilst the inclusion of cockroach meal reduced feed cost by 3% and 7% in dietary treatments T1 and T2 respectively. Most of the internal organs recorded no significant difference (P >0.05) but rats on the cockroach meal diets recorded significantly (P = 0.001) lower relative heart weights. Relative kidney weights were also smaller (P = 0.034) for rats on diets containing 4% cockroach meal. Feeding diets containing up to 4% cockroach meal had no negative effects on the feed intake, ADG and FCR of the rats, and can therefore be safely fed to monogastrics up to 4% of the diet.

Keywords

• cockroach
• albino rats
• feeding
• protein
• entomophagy
• low cost ingredient
• monogastrics