دراسة بعض الخصائص الفيزيائية و الكيميائية لمياه نهر دجلة و تأثيرها في أجنة أسماك الكارب الشائع (Cyprinus carpio L.)‎

Abstract EN

: This study was carried out in Al-Saouira city in Wasit Province during the period 01/03/2016 to 01/05/2016 which is the reproduction season of common carp fish in Three fish hatcheries (Al-Saouira, Al-Jnaen Al Moalqa and Hadi Hindas fish Hatchery) in different locations on Tigris river, some of the physical and chemical Characteristics of water were measured to determine their effects on rates and types of Malformations in embryos of common carp (Cyprinus carpio L.) and their larvae.

The Results showed that significant differences between hatcheries in the water Temperature, the biochemical oxygen demand (BOD5), electrical conductivity (EC), Salinity, total dissolved solid (TDS), sodium ions (Na), total hardness (T.H.), calcium Ions (Ca+2) and bicarbonates (HCO3-), cadmium (Cd) and zinc (Zn), with regard to Larva malformations, the results of statistical analysis showed no significant Differences in malformations ratios of spinal deformities, twisting the tail, Deformation of the yolk sac, cardiac edema, shortened body, larva with deformed Skull and total malformations in the larvae of common carp fish in all hatcheries Included in the study on the Tigris river, the total ratio of malformations 0.076 and 0.084 and 0.092 in each of Al-Saouira, Al-Jnaen Al Moalqa and Hadi Hindas fish Hatchery respectively.