Mesopotamichthys Research Articles

Evaluation effect of dietary egg lecithin on digestive enzymes and body composition of juvenile binni (Mesopotamichthys sharpeyi Gunther, 1874)

In this study, the effects of dietary egg lecithin on digestive enzymes and body biochemical composition of juveniles Mesopotamichthys sharpeyi was evaluated. Four experimental diets including control diet (with 0% egg lecithin) and three diets containing 2%, 4% and 6% egg lecithin were used. At the end of the experiment, digestive enzymes activity (lipase, amylase and alkaline phosphatase) and body biochemical compositions were assessed. The results showed no significant differences between experimental treatments in moisture and ash content. Maximum content of the crude protein and crude lipid were recorded in 4% lecithin treatment and it had significant differences with control group. The digestive enzymes activity (lipase, amylase and alkaline phosphatase) showed significant differences between control and experimental groups. An increasing trend was observed in the digestive enzymes activity among treatments. Based on the results, it was concluded that 4% to 6% dietary egg lecithin in the diet, can promote growth and survival rate of juvenile binni.

Evaluation effect of soybean meal and baker's yeast on resistance to anoxia stress and blood biochemical parameters of fingerlings (Mesopotamichthys sharpeyi Günther, 1874)

This study was carried out to investigate the replacement of fish meal with soybean meal and baker's yeast on plasma biochemical parameters and resistance to anoxia stress in fingerlings of Mesopotamichthys sharpeyi belongs to the family cyprinidae. Fish with initial average weight of 4/40±0/29 gr were fed experimental diets (0, 25, 50, 75 and 100% Replacement of fish meal) for 90 days. At the end of the experiment, biochemical factors such as cholesterol, triglycerides, total protein, albumin and globulin were measured. Based on the results, no significant difference was observed in total protein and globulin in experimental treatments compared with control group (p>0.05). But the amount of albumin in the control group was significantly higher than other treatments (p<0.05). Also, Cholesterol levels were significantly increased while amount of triglycerides were significantly decreased in alternative treatments compared with control group (p<0.05). Results of resistance to anoxia stress showed that used different levels of soybean and baker's yeast in diet, had not negative impact on the survival rate of Mesopotamichthys sharpeyi, even fish resistance was more in anoxia stress compared with control group.

Effects of short-term starvation and re-feeding on antioxidant defense status in Mesopotamichthys sharpeyi (Günther, 1874) fingerlings

The objective of this study was to evaluate the impact of short-term starvation and re-feeding on oxidative stress in Mesopotamichthys sharpeyi (Gunther, 1874). After two weeks adaptation to new conditions, a total number of 270 fingerlings were distributed into nine 300-L fiberglass tanks, equipped with aeration system in three treatments including 4, 8 and 16 days starvation (each in 3 replicates). After starvation, all groups were fed for 32 days. At the beginning of trial and at the end of starvation and re-feeding periods, blood samples were collected, plasma was separated and activity of catalase (CAT), superoxide dismutase (SOD), glutathione peroxidase (GPX) and malondialdehyde (MDA) content were assayed. Based on the results, no significant difference was observed in SOD activity at the end of starvation and also after re-feeding between the different treatments. At the end of starvation the activity of the CAT and GPX increased significantly in 8 and 16 days of starvation groups compared to the base. Moreover, a significant increase in MDA levels of plasma was found during food deprivation. These findings showed that short-time starvation increased antioxidant enzymes activity in plasma of M. sharpeyi but short-term food deprivation and re-feeding periods in this species does not cause disturbances in the antioxidant defense status.

Effect replacement of fish meal with soybean meal and baker's yeast on digestive enzymes activity and biochemical body composition of juveniles (Mesopotamichthys sharpeyi Günther, 1874)

Effect replacement of fish meal with soybean meal and baker's yeast on digestive enzymes activity and biochemical body composition of juveniles (Mesopotamichthys sharpeyi Günther, 1874)

Effect replacement of fish meal with soybean meal and baker's yeast on digestive enzymes activity and biochemical body composition of juveniles (Mesopotamichthys sharpeyi Günther, 1874)

Effect replacement of fish meal with soybean meal and baker's yeast on digestive enzymes activity and biochemical body composition of juveniles (Mesopotamichthys sharpeyi Günther, 1874)

Effect of Garlic on Growth Performance and Body Composition of Benni Fish (Mesopotamichthys sharpeyi)

A feeding trial was conducted to evaluate the effect of garlic powder on the growth performance and body composition of Benni fish (Mesopotamichthys sharpeyi). Five isonitrogenic and isolipidic diets were prepared with levels of 0 (control), 5, 10, 20 and 30 g kg -1 Garlic powder. Triplicate groups (15 fish per tank) of Benni fish with initial weight of 11.30±0.04 g were hand-fed to visual satiation at two meals per day for 8 weeks. The result of experiment showed, growth performance and feed efficiency were improved in all treatments compared with control group. But according to the results, the best final weight, weight gain rate (WGR%), specific growth rate (SGR) and food conservation ratio (FCR) were observed in the fish fed 10 g kg-1 garlic powder in diet. The highest protein content was obtained in the fish fed with dietary with 10 g kg −1 garlic powder. Also fat tissue of fish had significantly decreasing trend compared with control group. Moisture and ash contents were no significantly affected by garlic powder. Based on the results of growth performance and body composition of fish, it can be concluded that 10 g kg -1 of garlic powder have good effect on growth performance and body composition of

Trace elements in fish from the Arabian Gulf and the Shatt al-Arab River, Iraq.

In the Arabian Gulf region, recently, vast industrial, agricultural, economic and social developments have taken place, in addition to an increase in population. This may enhance the magnitude of environmental pollution year by year. No detailed study has been undertaken to assess the concentrations of trace elements in commercial species of fish from the Arabian Gulf and the Shatt al-Arab River, despite the fact that fish are considered an essential part of the diet in the region. Therefore, an investigation was carried out on the concentration of Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, V and Zn in the following fish species from the Arabian Gulf: Tylosurus strongylurus, Eleutheoronema tetradactum, Pomadasys arel, Platycephalus indicus, Ilisha elongata, Thryssa hamiltonii, Arius thalassinus, Acanthophagrus luteus, Johnieops sina, Liza dussumeiri, Hilsa ilisha, Nematolosa nasus and Otoliths argenteus, and on species from the Shatt al-Arab River: Mesopotamichthys sharpeyi, Barbus xanthopterus, Barbus scheich, Aspius vorax, Cyprinus carpio, and Barbus grypus. Trace element levels in sediment samples from the area were also determined since sediments can accumulate different elements and may reflect the extent of pollution by these elements.

Isoenzymes of cyprinids from the vicinity of Basrah in relation to classification

Tissue extracts of muscle, heart, brain, eye lens and liver were examined electrophoretically for phosphoglucomutase, tetrazolium oxidase, glucose-6-phosphate dehydrogenase activity in nine species belonging to the family Cyprinidae. PGM, TO and G6PD have been found in all the species studied coded at a single locus; PGM can be consider as a good taxonomic criterion to differentiate Bertinius subquincunciatus; TO to differentiate Mesopotamichthys sharpeyi and Cyprinus carpio, and G6PD to differentiate Bertinius from the remaining cyprinids studied. The biochemical data reported indicates that the different genera of the family Cyprinidae could probably all be differentiated from each other by the mobility of PG M isozymes.