Fish biodiversity and anatomical weight composition of fish from Al-Rahad Turda, North Kordofan State in Sudan

Abstract

This study was conducted in the area of Al-Rahad, North Kordofan State, it aimed to know the fish biodiversity in the manufactured water sources (Turda) and to determine the physiochemical parameters of the water (pH, temperature, dissolved oxygen, ammonia and water transparency), and the body weight composition of the fish species which is found there and fish condition factor in attempt to find out the impact of water characteristic on the fish status. Water analyses were done using water analysis devices. Fifty samples of fish were collected from each species found there. The total length, standard length (cm) and total weight (g) were determined and body weigh composition was done using measuring board and sensitive balance. Statistical analysis was done using One Way ANOVA. Test followed by least significant difference (LSD). Results of biodiversity indicates just five species were identified namely Oreochromis niloticus, Clarias gariepenus, Lates niloticus, Bagrus bajad and Heterotis sp. Water analysis were (0 mg/L) for ammonia, pH (8.5), dissolved oxygen (7.5 mg/L), temperature (23°C) and transparency (63 cm). They were in normal range of water for fish life. Heterotis sp. (Umkoro) fish had the most eaten parts (66%), followed by Oreochromis niloticus and Lates niloticus (50%) while Bagrus bajad gives 49% and Clarias gariepenus gives 44% which mean fish is in good condition and rich nutritionally environment.

Keywords: Fish biodiversity, tilapia, cat fish, fillets, Heterotis, Al-Rahad.