Bbalali S.,Gorgan University of Agricultural Sciences and Natural Resources |
Hoseini S.A.,Gorgan University of Agricultural Sciences and Natural Resources |
Ghorbani R.,Gorgan University of Agricultural Sciences and Natural Resources |
Kordi H.,National Inland Water Aquaculture Institute
Journal of Aquaculture Research and Development | Year: 2013
This study was conducted to find out the Relationships between Nutrients and Chlorophyll a concentration in the International Alma Gol Wetland. Water samples were collected fortnightly from five stations in the wetland. They were collected during summer and autumn. Results illustrated that there was a signifcant correlation between chlorophyll a and logarithm chlorophyll a with nitrate, nitrite (P<0.01) and ammonia (P<0.05) but there was no signifcant correlation between chlorophyll a and logarithm chlorophyll a with silica, total alkalinity, sulfate and resolve phosphorus (P>0.05). © 2013 Balali S, et al.
Pourgholam R.,Caspian Sea Ecology Research Center |
Ghiyasi M.,Caspian Sea Ecology Research Center |
Rezai M.,Caspian Sea Ecology Research Center |
Nasrollahzadeh H.,Caspian Sea Ecology Research Center |
And 4 more authors.
Journal of Mazandaran University of Medical Sciences | Year: 2013
Background and purpose: Diazinon is a widely used organophosphorus pesticide around the world especially in rice paddy fields. Some studies showed that such toxic chemicals can influence the health conditions of fish at various levels including fish immune system and increase the fish susceptibility to infectious diseases. Materials and methods: In this study, histopathological effects of different sublethal concentrations of diazinon at 1, 2 and 4 mg/L were investigated on gills, liver, spleen, kidney and nostril of grass carp (Ctenopharyngodon idella). One hundred and twenty grass carps weighing 850±155 g were studied at 1, 7, 15, 30 and 45 days post-exposure to the toxicant for 12 hours at 18- 22°C. Results: Light microscopic examinations of tissues showed that toxicant concentrations caused severe damages to the cells and tissues structure such as congestion of blood vessels, haemorrhage, cellular infiltration, pyknosis of cells nuclei, vacuolar degeneration and general necrosis in the tissues of kidney, spleen and liver. Conclusion: There were degenerative changes of interstitial tissue and detachment of tubular basement membrane in kidney. We also observed hyperplasia and fusion of secondary lamellae, separation and sloughing of epithelium from the underlying basement membrane in gill sections and denudation of epithelial surface in nostril.
Fallahi M.,National Inland Water Aquaculture Institute |
Rahbary S.H.,Islamic Azad University at Tehran |
Shamsaii M.,Islamic Azad University at Tehran
Iranian Journal of Fisheries Sciences | Year: 2014
Growth rate of the green algae, Scenedesmus obliquus, influenced by Diuron, with the trade name of (Karmex) and chemical name of (N'-(3,4-Dichlorophenyl)-N,N-Dimethylurea), was examined in the present study. This study is performed in the laboratory of National Inland Waters Aquaculture Institute in Iran during 96 hours in 6 treatment and 3 replicates, using 500 cc Erlenmeyer Flasks. Measurement of growth rate in the same period of time was performed by three simultaneous methods of cell counting, measurement of turbidity and determination of the rate of chlorophyll a. Quantities of EC10, EC50, EC90 and allowable concentration level of this poison for the studied algae were obtained as 0/0019, 0/1, 0/05, 0/02 milligram per liter, respectively. Achieved quantities of EC were used in four 500cc Erlenmeyer flasks each containing more than one million algae cells and in 24h periods adding up to be 96 hours, concentration of the algal cells was evaluated by cell counting. Results of the present experiment showed that the frequency of S. obliquus was significantly different in presence of concentrations obtained from EC indicators and decreased sharply in EC90 quantities.
Baramaki Yazdi R.,Birjand University |
Ebrahimpour M.,Birjand University |
Mansouri B.,Islamic Azad University at Kermanshah |
Rezaei M.R.,Birjand University |
Babaei H.,National Inland Water Aquaculture Institute
Bulletin of Environmental Contamination and Toxicology | Year: 2012
The objective of the present study was to investigate the levels of metals (Cd, Cu, Zn, Pb and Cr) in muscle, gill, liver, kidney and intestine of two freshwater fish, Ctenopharyngodon idella and Perca fluviatilis, in Anzali Wetland, Iran. The concentrations were different between the fish species as well as among the tissues of fish. Results showed that the metal concentrationsin both fish species were in descending order of Zn>Cu>Pb >Cr>Cd. Results also showed that the Cd, Cu, Zn, and Pb concentrations in the muscle of both fish from Anzali Wetland are below levels of concern for human consumption. © Springer Science+Business Media, LLC 2012.
Taati R.,Islamic Azad University |
Ahmadizadeh M.,Islamic Azad University at Rasht |
Valipour A.R.,National Inland Water Aquaculture Institute
Journal of Veterinary Research | Year: 2016
BACKGROUND: Vitamins are considered an essential part in diet of aquatic animals. OBJECTIVES: This study was carried out to assay the effect of different levels of Vitamin E on growth performance, carcass compositions and blood parameters of common carp fingerlings (Cyprinus carpio). METHODS: Total number of 96 common carp fingerlings weighing 15.49 ± 3.64 g were randomly distributed into 12 fiberglass tanks in four treatments group including control (without added vitamin), 100, 200 and 400 mg/kg Vitamin E in three replicates and kept at a density of 8 fish per tank for 10 weeks. RESULTS: Results showed that the highest weight gain, percentage of body weight increase, mean daily growth, specific growth rate, condition factor and the lowest food conversation ratio were observed in fish fed with 200mg/kg Vitamin E but no significant differences were seen compared to other treatments (p>0.05). Fish fed with 200mg/kg Vitamin E had the highest (p>0.05) contents of protein and ash compared to control group. There was an increase in values of RBC, Hct and Hb in fish fed with 100, 200 and 400 mg/kg Vitamin E in comparison with control group. Significant differences were observed in MCHC in fish fed with 100 mg/kg Vitamin E compared to control and fish fed with 400 mg/kg, also treatment 200 mg/kg with treatment 400 mg/kg Vitamin E (p<0.05). Fish fed Vitamin E in 200 and 100 mg/kg had the highest WBC count. Fish fed with different levels of Vitamin E had higher lymphocyte in comparison with control group and fish fed with 100 mg/kg had significant difference with control in lymphocyte (p<0.05). CONCLUSIONS: Vitamin E in level of 200 mg/kg can play an important role to enhance growth performance, nutrition efficiency and improving blood indices and support cell immunity in common carp fingerlings.