Abstract:
This research focuses on the effects of physical and chemical water factors such as temperature, salinity, dissolved oxygen, and pH on the spatial and seasonal distribution of fish in the Tigris River. An analytical approach was adopted, involving water sample collection from two primary sites: the first between Al-Suwaira and Al-Kut Barrage, and the second between the confluence of the Diyala River and Sheikh Saad District. Field measurements were conducted using advanced techniques, and fish diversity and density were monitored across different seasons to correlate environmental variations with species distribution.
