جستجوی مقالات مرتبط با کلیدواژه « کپور معمولی (cyprinus carpio) » در نشریات گروه « محیط زیست »

This study was conducted to evaluate the effects of lysozyme on dietary supplement scales in some growth factors, hematologic immunity indexes, and serum biochemical parameters in common carp (Cyprinus carpio). For this purpose, 180 pieces of fish were weighed 25.94 ± 0.1 g in 12 tanks and 4 treatments with 3 replications. After the adaptation period, fish were fed with diets containing 0, 0.5, 1 and 1.5 g / kg lysozyme for 8 weeks. At the end of the period, the fish were biometric and blood samples were taken and blood indices were examined. The results of this study showed that this immune stimulant had a positive effect on growth rate of about 26/37 grams and there was a significant difference between treatments (p<0.05). Lysozyme diet showed a significant difference between the number of white blood cells and the control group. There was an increasing trend in the number of hemoglobin in the experimental group. The differential count of white blood cells only showed a significant increase in lymphocyte count between treatments and control. There was a significant difference between treatments and control in neutrophil count. Also, in the study of biochemical parameters of blood, we found that there was a significant difference in all three factors and there was an increasing trend. According to the results of this study, it seems that the use of doses of 1 and 1.5 g / kg of lysozyme may have a beneficial effect on the improvement of blood and biochemical parameters of the serum and the growth of this breeding stock.

The use of natural and vegetable ingredients as an additive in fish diets will increase the health of the host. The aim of this study was to evaluate the effects of adding sugar beet molasses to carp fish meal to evaluate some blood indices. The experiment consisted of 360 pieces of common carp with an average weight of 22 ± 2.5. After one week of adaptation, it was fed for a period of 8 weeks. The experiment was carried out in the form of 4 treatments and each treatment with 3 replications including: Molasses (treatment 1), diet containing 0.5% molasses (treatment 2), diet containing 1% molasses (treatment 3) and diet containing 2% molasses (treatment 4) Done. The fish were fed daily with 3% body weight and twice daily with experimental diets. Food from the control group, the commercial food of the common carp of the corporation was no molasses. The results showed that red blood cells were significantly increased in 2% molasses. Hemoglobin was also found in 2% molasses (P <0.05). MCHC also increased in 2% molasses. There was no significant difference between the treatments after the differential count of white blood cells. In general, a diet containing molasses was effective on the blood indices of common carp, increasing the number of red blood cells and increasing hemoglobin in 2% molasses.

Release of detergents via urban sewages into aquatic ecosystems can have adverse effects on aquatic life. In this study, the acute toxicity of NaOCl on Common carp (Cyprinus carpio) and Caspian kutum (Rutilus frisii kutum) with average weights of 16±1 g (mean ± SD) and 3.5±1 g, respectively, was investigated to determine 50% lethal concentration of the fish populations in 96 hours.
Experiments were carried out in a static base according to O.E.C.D standard method in 4 days (96 hours). After primal experiments to explore the lethal range, the main research was performed by selection of 5 final treatments (0, 15, 30, 60, 120 mg L-1) for Cyprinus carpio and 6 final treatments (0, 5, 10, 20, 40, 80 mg L-1) for Rutilus frisii kutum, each one with 3 repeats. Eventually according to the results obtained by probit analyses, amount of LC1, LC10, LC30, LC50, LC70, LC90 and LC99 were calculated in fishes during 24, 48, 72 and 96 hours.
Findings: In the present study, 100% of mortality of Caspian kutum in concentration of 80 mg L-1, happened only within the first hours they exposed to pollution. However, this process in Common carp in concentration of 120 mg L-1, happened after 30 hours passed from starting the experiment. The acute toxicity of Common carp and Caspian kutum were 39.48 and 23.77 mg L-1 respectively.
The present study showed that this washer is dangerous for fishes and also Rutilus frisii kutum is much more vulnerable to NaOCl in comparison with Cyprinus carpio.

The present study was carried out in order to examine the impact Cadmium on amount of iron in the blood of common carp. Sampling of common carp was carried out randomly from a fish culture pond in southeast of Babol by trawling. Firstly the fish were become compatible with the laboratory conditions during 48 hours and then have been influenced by different concentrations through one blank and 3 experimental groups of A (4.296 mg/l), B (7.127 mg/l) and C (8.656 mg/l). There were 12 aquariums, each including 12 pieces of fish. It was tried to apply an equal environmental condition for all of the aquariums during the experiment. Bleeding was done from the fish vein and heart after 48, 72 and 96 hours of anesthetizing.. Concentrations of cadmium and iron have been determined by ICP-OES after acid digestion of blood samples by Microwave. In analyzing Cadmium, the fish average weight and length (total length) were 163.6 g, 23.6 respectively In this study it has been identified that the absorption scale of Cadmium increases as the time passes and generally it showed a significant increase (p<0.05, n=3) during the time in cadmium concentrations of blood comparing the blank sample. This has no significant trend since the blood acts as a carrier and is a junction for heavy metals such as cadmium to the target organs. Furthermore, in addition to refusal of this theory that: "concentration of lead and cadmium ions by interactions with common carp blood iron has a significant impact on iron amount in blood", there has not seen any significant relation (p<0.05, n=3) between increasing of the amount of absorbed Cadmium and blood iron changes. Therefore, it could be concluded that probably no interaction between cadmium, and blood iron happens in blood circulation and the blood iron changes during the test is probably because of some physiological changes resulting from stress in fish blood.