Effect of Adding Different Levels of Watercress Seed Powder to the Diet on Some Blood Traits of Common Carp (Cyprinuscarpio L.) Reared in Floating Cages

Abstract

This study was conducted in Al-Diwaniyah Governorate, for a period of 60 days from 10/5/2021 to 5/12/2021, aimed to use the watercress plant (Eruca sativa mill), as a food additive in the diet, to determine its effect on the parameters and dummy of common carp (Cyprinuscarpio L.). A total of  72 fish were randomly distributed with an average weight of 50 gm into four treatments with three replications on 12 floating cages (plastic baskets), and the treatments were as follows: T1: control treatment (protein ratio 26.28), as for treatments T2, T3 and T4, watercress seed powder was added in proportions of 4, 6 and 8 g/kg of feed, the percentage of protein content in it was (27,063, 27.565, 27.544) %, respectively, fish were fed on experimental diets at 3% of their weight per day.The results indicated that the highest value of the white blood cell rate was recorded to T4 (39.59 ml/10³), which showed a significant difference from the rest of the treatments.It was followed by T2 and T3 (33.64 and 32.46 ml/10³), the same applies to the red blood cell count, which was recorded as T4 (0.33 ml/10⁶), compared to T2 and T3 (0.31 and 0.32 ml/10⁶), also, the highest percentage in the level of hemoglobin (12.15 g / 100 ml),T4 showed the highest value for the volume of compacted blood cells (38.50%), the crude protein in the body of fish fed on the four diets of the experiment ranged between (60.204 - 61.388)%, while the percentage of protein in fish before the experiment was 57.384%, the percentage of fat was confined between (7.170 - 5.810)%, while its percentage in fish before the experiment was (7.671)%.