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The current study included conducting a comparative study on two types of bony fish Osteichthyes with similar
aquatic environment and different food habits, namely: Arabibarbus grypus (Heckel, 1843), which belongs to
the family Cyprinidae, and the fish Acanthopagrus arabicus (Iwatsuki, 2003), which belongs to the family
Perciformes; Its purpose is to conduct a comparative study between them on some aspects related to
determining locomotor activity as well as determining its nutritional value by estimating the chemical content
of fish muscles, which includes: protein content, fat content, moisture content, ash content, and caloric values
in two different areas of the body: (R1 and R2), and (50) samples for each type of study fish were collected from
Euphrates river (Shatt al-Hindiya) in Karbala governorate and for the period between (September 2021and
November 2021) using gill nets and hand-throwing nets with the help of fishermen in the area.
The results of the current study demonstrated a difference in the values of the rates of chemical components in
the muscles of the study fish, as the total rates of protein content values in Arabibarbus grypus ranged between
(16.72 - 17.52%),while the total rates of protein content rates in Acanthopagrus arabicus were (16.80 - 18.67
%),while The total averages of the values of the fat content of the Arabibarbus grypus ranged between (5.95 -
8.24 %),while the total averages of the values of the fat content of the Acanthopagrus arabicus were (4.65 - 6.21
%), and the total averages of the values of the moisture content of the Arabibarbus grypus ranged between
(70.34 - 67.01%),While the values of the total rates of moisture content for Acanthopagrus arabicus were (76.45-
72.56%), and the total averages of ash content rates for Arabibarbus grypus ranged between (6.22 - 6.70%),
while the total rates of ash content in Acanthopagrus arabicus were (1.36-
The results of the current study proved that Arabibarbus grypus fish have higher calories (energy) compared
to Acanthopagrus arabicus, the total calorie values of Arabibarbus grypus were (133.56 Kcal/g), while the total
calorie values of Acanthopagrus arabicus were (120.76 Kcal/g).
In light of the current results, the study fish was considered among the medium-fat fish due to its proportions
of the fat content in its muscles.