Trace elements transformation in young rabbit muscles

L M Darmohray,I S Luchyn,B V Gutyj,G A Paskevych,P I Golovach,V I Vishchur,M M Zhelavskyi

doi:10.15421/2019_798

Abstract

According to scientific publications, transformation of nutrients in the rabbit feed should be studied with regard to rabbit nutritional specifics that is caused by differences of alimentary canal of the species, involving microorganism role in the digestive process. In the experiment, The research considered the transformation of essential micronutrients of feed (Zn, Cu, and Mn) and their concentration in muscle carcasses of rabbits of differentl age and origine, in industrial rabbit production in Prykarpatyia. Feeding norms and nutrient requirements for experimental animals were performed according to rabbit nutrition requirements approved by the VIII International Rabbit Congress (EGRAN tables, 2004). It has been found out that supplying rabbits of different genotypes with the same nutrition affect the retention of studied micronutrients in certain muscles carcasses differently. The experiment demonstrated that the longest back muscle of a 3-month old new hybrid rabbit (NTC) contented the highest amount of zinc and accounted 6.78 � 0.118 mg kg-1 which was by 1.43 mg kg-1 (p =0.001) more than in the rabbits of the local chinchilla (second group). It is proved that the greatest amount of cuprum was concentrated in the hip carcasses of rabbits of the first group (NTC). This rabbit genotype (first group) dominated over the local breed (the second group) regarding this indicator, when the animals were 2 and 3 months old, by 0.15 and 0.49 mg kg-1 respectively (p=0.01). The content of manganese in the muscles of the hips was also higher in the newly-selected three-breed during all the farming period. Thus, at the age of 2 months, rabbits of the first group outweighed their peers in the second group by 6.52 mg kg-1 (p=0.05), at the age of 3 months - by 1.57 mg kg-1 (p=0.01) and at the age of 4 months - by 0.89 mg kg-1 (p0.01). The three-breed rabbit genotype of of the first group was dominated by pure-breed analogues of the second group in terms of weight gain and feed conversion by 7.5 and 3.4% respectively. Due to better transformation of these trace elements, in the body of intensively growing rabbits, the environment is less polluted. The highest concentration of these trace elements was found in the rabbit muscles of both groups in the 3rd month of life. The highest content of the micronutrients studied was observed in the longest and suprascapular muscle of rabbits. The prospects of further research on the study of the transformation of other heavy minerals in industrial cultivation of rabbits has been overviewed.

Highlights

Over the last few years, much attention has been paid to the problem of environmental contamination with salt trace elements
An analysis of the material in the table indicates that the content of heavy metal compounds in the feeds under study satisfies the need in nutrints for experimental rabbits by incorporating premix feed
It was found that three-breed young rabbits dominated over analogues of local chinchilla by weight gain and feed conversion by 7.5 and 3.4% respectively

Summary

Introduction

Over the last few years, much attention has been paid to the problem of environmental contamination with salt trace elements. Some of the heavy metals are deposited (transformed) in the tissues, and re-enter the bloodstream and are excreted from the body, but more slowly than accumulated (Mamenko et al, 1998; Gutyj et al, 2017). Heavy metals are excreted from the body through synthetic complexes and chelates, but these drugs cause side effects in the body, in particular, the depletion of the body to trace elements (Kravtsiv et al, 2005). Changes in the ecological structure directed in this field can affect the productivity of new populations with a given genetic resource in short time. Based on the use of ecological mechanisms of population transformation, it is theoretically possible to consciously control the evolutionary process directly in nature, to create new forms of animals that use environment resources more efficiently, increase the efficiency of energy and geochemical work of biogeocenoses (Sedilo et al, 2018)

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Conclusion