Discussion of a Master’s Thesis
The Department of Biology at the College of Education for Pure Sciences at the University of Karbala discussed a master’s thesis tagged (a comparative study for calculating the respiratory area and calculating the proportions of red and white muscles in the Shank, skeleton and Zayli tilapia in the holy province of Karbala), set by the student (Zahra Hussein Falih Al-Asadi), and under the supervision of Assist. Prof. Dr. Muhammad Wissam Haider Al-Muhanna. The thesis aimed to study some anatomical indicators that determine the motor activity of the fish of the current study, through an anatomical study of the gills in fish by measuring the respiratory area of the gills included, the numbers of gills, their length rates, and the numbers of plates Secondary gills per one millimeter, and the area of one secondary gill, measurement of respiratory surface area rates of absolute (mm 2) and relative (mm 2 / g), calculating the ratios of red muscles and eggs in them in two different regions of the body of the studied fish, determining the type of level of motor activity of the studied fish After knowing the values of the aspects of the study above.
the results showed that the factor of the total length of the gill filaments (L) had a direct effect on increasing the value of the absolute gill area in tilapia, shank, and skeleton, small fish had a large respiratory area (mm² / g) compared to large fish Which had a small surface area in the three studied species, which indicates an increase in oxygen consumption in small fish to provide the energy needed to meet the high metabolic requirements and rapid growth. The fish of the current study were considered among the intermediate fishes, depending on the rates of the total length of the gill filaments, the results of the study showed present the importance of the posterior region (caudal peduncle) in the swimming mechanics of fish.
The discussion resulted in several recommendations, including:
Conducting comparative anatomical studies of the alimentary canal of the fish of the current study and knowing the similarities and differences in their nutrition and the extent of its impact on their motor activity, conducting a field study to determine the environmental pollutants affecting the structure of gills in fish, conducting a comparative study of the factors affecting the culture of the studied species, conducting a histological study to determine pathological changes In fish as a vital evidence of the effect of pollutants on fish tissues, conducting a study of the abundance of fish in the Euphrates River (Shatt al-Hindi) in Holy Karbala, conducting a comparative study of muscle ratios in two types of saltwater fish and two types of freshwater fish, conducting a comparative study of muscle ratios in fish families and its relationship to motor activity, conducting a comparative study of muscle ratios in fish families living in saltwater and its relationship to motor activity. The student got an excellence grade.
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