Abstract:
This study was conducted in the area of Alrahad , North Kordofan State during summer (March, 2017), it aimed to find out the biodiversity of fish in the Turda and to determine the physiochemical parameters of the water (pH, temperature, dissolved oxygen, ammonia and water transparency) of Alrahad Turda, and the body weight composition of the fish species which is found in the Turda in an attempt to find out the impact of water parameters on the fish and to determine the nutritional value of the fish Hetrotis spp. Water analyses were done using water analysis devices (Appendix 12- 16). A total of 50 fish samples were collected, ten fishes from five different species found there. The total length, standard length (in centimeters) and total weight (in grams) were determined and body weight composition was done using measuring board (100cm) and normal balance (10kg) (Appendix 1). Chemical analysis of five fish samples (Hetrotis spp) was performed to determine the percentages of (protein, fat, ash and moisture) in the fish flesh was done using (AOAC. 2005). Statistical analysis was done using One Way ANOVA Test followed by least significant difference (LSD).
Results of biodiversity indicated that just five species were jn Alrahad Turda, namely (Oreochromis niloticus, Clarias gariepenus, Lates niloticus, Bagrus baged and Hetroti sspp). Results of water analysis were (0 mg/l) for ammonia, pH (8.5), dissolved oxygen 7.5mg/l, temperature 23oC0 and Transparency 68/cm). They were in normal range of water for fish in aquaculture. Results showed that Hetrotis spp (Omkoro) fish had the most edible parts (66%), followed by Oreochromis niloticus and Lates niloticus (50%) while Bagrus bayedgives (49%) and catfish gave only 44%, proximate composition of Hetrotis spp (Omkoro) fish were in Average DM% (83.58), Ash (1.68), CP (27.35), EE (7.41), CF (2.75) and NFE was 46.23. The results
proved that Hetrotis spp (Omkoro) presents high amount of flesh and high
nutritive value.
