A Study of the Calculation of The Ratio of Red and White Muscles in Grass Carp (Valeneciennes, 1844) Ctenopharyngodon Idella and Silver Carp (Valeneciennes, 1844) Hypophthalmichthys Molitrix in the Holy Karbala Governorate

Abstract

This study was conducted on two types of bony fish that live in fresh water, (50) fishes were collected with five groups of different lengths.The  study results in a sharp difference in the rate of ratio of red and white muscles based on the examined body area and the length group studied.The rates of red muscle ratios increased with the increment of the average of total length of fish as we headed towards the caudal area of the body, This is proven by the study of the correlation relationship, which ranged the value of the correlation coefficient (0.991,0.993), and the rates of total red muscle ratios in grass carp ranged between (12.34-20.18%), and in silver carp was between (14.43-22.18%), while the rates of total white muscle ratios in grass carp ranged between (87.31-79.60%), and in silver carp was between (85.50-77.49%), Thus, it is clear that the rates of white muscle ratios decrease with the increment of the average of total length of the fish as we head towards the caudal area of the body,  This is proven by the study of the correlation relationship, which ranged the value of the correlation coefficient (-0.995, -0.988). Additionally, the statistical analysis of the results found out the differences recorded by calculating the total rates of the ratio of red and white muscles, as well as their rates within the studied body areas. There are significant differences (p<0.05) in grass and silver carp, grass and silver carp fish were considered among the steadfast fish, because they contain high rates of red muscles and they practice swimming in a slow, continuous and long way. The study involves a comparison about move active for studying  fishes through measurement resparetary surface area, and measurement red and white muscles ratio. This study is the first of its kind locally.