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This study was conducted in the laboratories of the College of Agriculture, University of Basrah for 75 days, in order to study the effect of using prebiotic (Safmannan) and bio-antibiotic (Fluconazole) on some growth and haemato-immunological parameters of the common carp Cyprinus carpio L. The fishes were divided into four categories of treatments; the first treatment was the control (basal diet), the second and third treatments (T2 and T3) contained 500 and 1000 mg.kg-1 diet of Safmannan, respectively while the fourth treatment consisted of adding 150 mg.100 g-1 diet of bio-antibiotic Fluconazole. The second and third treatments were significantly higher (P<0.05) than control and antibiotic treatments in the growth parameters such as the average of daily weight gain, the average of specific growth and the feed conversion of the second and third treatments. Blood proteins (albumin, globulin and total protein) showed significantly higher (p <0.05) values in the second and third treatments than control and antibiotic treatments. No significant differences were noted in both packed cells volume (PCV) and haemoglobin (Hb) among different treatments. The value of alanine aminotransferase (ALT) showed no significant differences among all treatments, while alkaline phosphatase (ALP) was significantly higher and aspartate transaminase (AST) was significantly lower in the fourth treatment. Hepatosomatic index (HSI) was significantly higher in all treatments compared with the control, while no significant differences in spleen somatic index (SSI) were noted among all treatments. Differential white blood count exhibited no significant differences among the treatments for eosinophils, basophils, lymphocytes and monocytes, while neutrophil count was significantly decreased in all treatments in comparison with the control.

The current study was conducted to examine the concentrations of some heavy metals (Fe, Zn, and Cu) in sediments, chemical and physical properties of water(Temperature, pH, Salinity, Total dissolved solid, Dissolved oxygen, Biological oxygen demand5, Alanin transporter enzyme, aspartase transporter enzyme, Alkaline phosphatase, and histological effects of the studied metal on liver of 96 cage fish and wild fish 4 fish per site Cyprinus carpio (Common carp) in the Euphrates River from October of 2018 until November of 2019. Three sites were selected on the Euphrates River in the middle of Iraq. The first site was Abu Luka, the second site was Al Saddah and the third site was the village of Al-Hussein. The results showed that in the first and second sites, the concentration of heavy metal in sediments and fish liver was greater than in the third site. In general, the cage fish at the first and second sites were higher than the wild fish. It was also noticed that the heavy metal concentration of both fish and sediment took the following order according to the seasons of the year, from the highest concentration of heavy metals to the lowest (summer > spring > autumn > winter). It was found that liver enzymes were directly affected by the presence of high concentrations of heavy Metals. So, both the ALT and AST increased in the first and second sites as compared to the third site. But the ALP value decreased with the increase in the concentration of the studied metal. The results of the histological slicing of the liver in the first and second places revealed a breakdown of the hepatocytes with the creation of gaps between the cells. Several spaces filled with remains of the destructed cells from the visceral tissue of the liver with infiltration of inflammatory cells in the infected area of the fish liver. It is the region’s first study that was concerned with the impact of heavy metal levels in the environment on cage fish and their relationship to blood components and liver enzymes.

This study was carried out to evaluate the effects of locally produced fish biosilage as fish meal alternative on feeding, growth efficiency and gut histology in common carp C. Carpio fingerlings. Biosilage was prepared by fermenting marine bycatch fish with date fruit residues, domestic vinegar and citric acid. The produced biosilage was incorporated in feeds to replace 0, 25, 50 or 75% of fish meal protein.Fish were fed for 14 weeks and feeding and growth parameters were close in the four feed groups so as fish survival rate during the experiment (88.9-93.3%). Histological examination of intestine and liver sections has showed improvements when fish fed on the four different feeds. Initial fish group showed signs of nutritional deficiency through limited size of intestinal villi and hepatocytes. However, the histological structure of gut was improved after fish were fed on the experimental feeds without significant differences between fish meal or fish biosilage feeds. The study concluded that fish silage could replace fish meal without adverse effects on feeding, growth efficiency and gut histology.

This study was carried out to determine some reproductive characteristics of the fantail goldfish Carassius auratus auratus females (standard length 69-224 mm. and total weight 21.1-255.35 g.) from rearing ponds in Basrah province, Southern Iraq. Standard length, total weight, gonad weight, absolute fecundity, relative fecundity, gonadosomatic index (GSI) and egg diameter were determined from October 2010 to April 2011 in 77 fantail goldfish females. Results showed that the studied reproductive parameters increased gradually from October, to attain peak in March and decreased again thereafter. Absolute fecundity ranged between 2877-357246 eggs, GSI 7.28-19.11 and egg diameter 298-1006 micron. Regression relationships between the various studied morphometric and reproductive parameters were calculated and the importance of these results to the culturists of this commercially important ornamental fish species was discussed.