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We estimated the impact of seasonal and anthropogenic contaminants on antioxidant status and lipid peroxidation in common carp. The fish were reared in a power station cooling canal and in a natural pond. The examined blood parameters were: superoxide dismutase (0.91 to 5.01 U・mg⁻¹ HGB), glutathione peroxidase (3.13 to 21.03 U・mg⁻¹ HGB), bilirubin (0.44 to 1.22 mg・dl⁻¹), urea (1.66 to 6.33 mg・dl⁻¹), malondialdehyde (0.39 to 2.21 nmol・mg⁻¹ HGB), cadmium (0.031 to 0.088 mg・kg⁻¹ w.w.), and lead (0.035 to 0.131 mg・kg⁻¹ w.w.). Antioxidants were measured colorimetrically, and metals by atomic absorption. Fish living in cooling water had higher levels of all the parameters studied.
The aim of this study was to determine the influence of refrigerate (post cooling) dropping waters on selected levels of elements in 3-month-old common carp organs and tissues at the Dolna Odra hydroelectric power station. Investigations took place twice: in the spring and autumn. The level of cadmium, nickel and zinc was examined in this study. Selected levels of elements were elevated with reference to the required standards of first and second-class quality waters. The content of the selected elements was compared with their level in the Odra River water. Based on the obtained results we claim that selected element levels were within the physiological standard range for this species. The water for breeding carp was in the second quality class and fulfills the European standards of common carp breeding.
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The aim of the study has been to estimate the effect of culture conditions and a culture site on magnesium (Mg) concentrations in freshwater fish. The study encompassed tissues (blood) and organs (gills, liver, kidney, dorsal muscles) of five fish species: common carp (Cyprinus carpio L.), rainbow trout (Oncorhynchus mykiss Walbaum), Siberian sturgeon (Acipenser baeri Brandt), northern pike (Esox lucius L.) and grass carp (Ctenopharyngodon idella Valenciennes). A total of 125 fish comprised 25 individuals of each species, aged 6, 12, 18 and 24 months. The fish were cultured in privately owned fish breeding ponds (Western Pomerania, Poland). Tissue and organ samples were wet mineralised in concentrated HNO3 in a CEM MDS 2000 microwave oven. Magnesium concentrations were determined by inductively coupled plasma atomic emission spectrometry (ICP-MS) in a Jobin Yvon type JY-24 apparatus. The research had an approval of the Polish Local Ethics Committee no 9/05. The magnesium concentration in the tissues and organs ranged from 26.3÷174.2 mg kg–1 w.w. The lowest Mg concentration was found in the gills of rainbow trout (26.3±5.4 mg kg–1 w.w.), and the highest – in the liver of rainbow trout (174.2±27.6 mg kg–1 w.w.). The magnesium concentrations were also significantly affected by the type of feed.
Concentrations of lead and cadmium were measured in the muscle of four fish species: pike, Esox lucius L., Eurasian perch, Perca fluviatilis L., roach, Rutilus rutilus (L.), and bream, Abramis brama (L.) collected from four lakes in the Olsztyn Lake District of northeast Poland. The fish were caught in the 1999-2000 period. Heavy metals contents were determined using the flameless atomic absorption spectrophotometry method (GF AAS). The mean lead content in the muscle of pike, perch, roach, and bream was 0.084, 0.098, 0.094, and 0.083 mg kg-1, respectively. Positive correlation coefficients (P< 0.001) were noted between Pb concentration and the body weight and total length of roach and perch (0.481 < r < 0.676, respectively). Negative correlation factors between Pb content and the body weight and length of pike (r = - 0.378, P < 0.01 and r = - 0.549, P < 0.001) and bream (r = - 0.557 and r = - 0.519, P < 0.001, respectively) were noted. The mean content of cadmium in the muscle of pike, perch, roach, and bream ranged from 0.0023 to 0.0025 mg kg-1. There were positive correlations between the levels of Cd in the muscle of roach and perch and body weight (r = 0.401, P < 0.01 and r = 0.323, P < 0.05, respectively) and total length (r = 0.436, P < 0.01 and r = 0.354, P < 0.05, respectively). The correlation coefficients between body weight and total length and the content of cadmium in pike and bream were – 0.228< r < 0.075.
The aim of the study was to determine the influence of cadmium sub-lethal intoxication doses (10 µg Cd · kg-1 body weight) on zinc levels in freshwater fish tissues, using the common carp as the experimental example. The 60-day experiment was divided into 8 stages during which organs and tissues were collected (liver, kidneys, skin, gills, alimentary tract and muscles). Zinc levels were determined in the collected samples at designated time periods. Statistically important changes in zinc concentrations were obtained. The performed experiment facilitated obtaining images of zinc level changes in cadmium poisoned carps during the detoxification process.
Background. Some heavy metals are essential to living organisms but their excess can disturb the homeostasis of an animal. The aim of the study was to assess effects of nickel compounds on carp, Cyprinus carpio L., and to follow the toxicodynamics of this metal elimination from intoxicated fish once they were transferred to a clean ambience. Materials and Methods. Individuals of carp, Cyprinus carpio L. were given a single intraperitoneal injection of a sub-lethal nickel nitrate dose (60 μg Ni ּkg-1 body weight) to assess their detoxification potential following transfer to uncontaminated habitat. The 60-day experiment was divided into 8 stages during which various organs and tissues of the fish (liver, kidneys, skin, gills, alimentary tract, muscles) were examined and subjected to assays for nickel contents at pre-set times. Nickel was determined with inductively coupling plasma atomic emission spectrometry (ICP-AES) in a JY-24 Jobin Yvon apparatus after wet digestion in concentrated HNO3 in CEM MDS 2000 microwave oven. Results. The fish intoxicated with Ni shown some behavioural changes; they were sluggish and stay near the bottom of a tank, their responses to light and sound were much slower than those of the control fish. The nickel level was observed to change with time: after initial nickel accumulation in the tissues, the metal was eliminated. The experiment highlighted changes in the intoxicated carp system during the process of detoxification. The highest biological half-life (t1/2) of nickel was recorded in alimentary tract (10 days), the lowest being typical of the liver (1.8 days). Conclusion. During detoxification, nickel was observed to be redistributed among the examined organs. Its elimination rate was depended on organ and varied from 0.003 to 0.008 µgּday-1. A long-term effect of sub-lethal intoxication was an about 5 % reduction of the fish body weight. This study has been financially supported by the State Committee for Scientific Research (KBN) (grant No. 3 PO4E 030 22).
Background. Chemical substances, including heavy metals, introduced into aquatic ecosystem can disturb the homeostasis of a habitat. The aim of this study was to assess the effects of cadmium compounds on common carp, Cyprinus carpio L. and to follow the toxicodynamics of cadmium elimination from intoxicated fish once they were transferred to a clean ambience. Materials and Methods. Common carp were given a single intraperitoneal injection of a sub-lethal cadmium dose (10 μg ּkg-1 body weight) to assess their detoxification potential following transfer to uncontaminated habitat. The 60-day experiment was divided into 8 stages during which various organs and tissues of the fish (liver, kidneys, skin, gills, alimentary tract, and muscles) were examined and subjected to assays for cadmium contents at pre-set times. Cadmium was determined with flameless graphite furnace atomic absorption spectrometry (GF-AAS) in a ZL 4110 Perkin Elmer spectrometer after wet digestion in concentrated HNO3 in CEM MDS 2000 microwave oven. Results. The fish intoxicated with Cd were sluggish, their responses to light and sound were much slower than those of the control fish. The cadmium level was observed to change with time: after initial cadmium accumulation in the tissues, the xenobiotic was eliminated. The experiment explains changes in the intoxicated carp system during the process of detoxification. The highest biological half-life (t1/2) of cadmium was recorded in the muscles (37 days), the lowest being typical of the liver (3.4 days). Conclusion. During detoxification, cadmium was observed to be redistributed among the organs. Metal elimination rate was depended on organ and varied from 0.001 to 0.006 µgּday-1. A long-term effect of sub-lethal intoxication was an about 10-percentage-point reduction of the fish body weight.
Lead, cadmium and total mercury concentrations have been determined in the muscle of six fish species: roach (Rutilus rutilus L.), bream (Abramis brama L.), perch (Perca fluviatilis L.), pike (Esox lucius L.), vendace (Coregonus albula L.) and whitefish (Coregonus lavaretus L.) from selected lakes in North-Eastern Poland (Łańskie, Pluszne, Dłużek and Maróz), caught over the period October 1999 to October 2000. Levels of Pb and Cd have not differed in fish of different feeding type, with the exception of cadmium in fish from Lake Łańskie (p≤0.01). Generally, the higher concentrations of total mercury were found in predatory than non-predatory fish (p≤0.01). Only some specimens (perch of the Dłużek and Maróz lakes and roach of the Dłużek Lake) had Pb levels exceeding 0.2 mg/kg. The Hg concentration in muscle of some perch (except from Lake Łańskie) exceeded the Polish safety limit of 0.5 mg/kg.
Introduction. Single intraperitoneal injections of sublethal doses of cadmium (10 µg Cd·kg-1 body weight) and nickel (60 µg Cd·kg-1 body weight) were administered to carp, Cyprinus carpio L., to determine detoxification potential of the fish affected after transfer to a clean milieu, as revealed by haematological parameters. Observation of haematological parameters allows the most rapid detection of changes in fish after cadmium and nickel injection Disrupted haematological patterns appear very quickly and precede changes in fish behaviour and visible lesions. The rapidity of toxic effects exerted by xenobiotics is related to the blood’s transport function, with the blood distributing the metals to all the body parts. Materials and Methods. Each experiment took 60 days and was divided into 8 stages during which blood was collected for assays. At each stage, blood samples were assayed for selected haematological parameters (RBC, WBC, Hb, Hct, MCV, MCHC, MCH). Results. Cadmium and nickel exposure-related changes in haematological parameters were detected. Immediately after injection, the haematological parameters were seen to change, a return to the normal values being observed after some time. The study allowed following the changes in the haematological parameters of cadmium- and nickel-injected carp during the process ofdetoxification. Conclusion. Within the 60 days following injection of sublethal doses of cadmium and nickel, haematological parameters were observed to revert to the levels close to those in the control.
The aim of the study was to assess the dynamics of cadmium and nickel accumulation in the carp, Cyprinius carpio L., during the rapid growth period between 3rd and 6th month of life, including seasonal changes. Chemical assays were performed on samples of gills, anterior and mid-posterior part of the alimentary tract, liver, kidneys, skin and muscles. Prior to the assay, 1-g tissue samples were digested with 3 ml of concentrated HNO3 in a CEM MDS 2000 microwave oven. The samples prepared this way were assayed for Cd and Ni. Cadmium level was determined with flameless graphite furnace atomic absorption spectrometry (GF-AAS) in a ZL 4110 Perkin Elmer. Nickel was determined inductively coupling plasma atomic emission spectrometry (ICP-AES) in a JY-24 Jobin Yvon apparatus. The results indicated that in the period of growth between 3rd and 6th month of life, cadmium and nickel concentrations in the examined carps fluctuated. Average cadmium content in examined organs ranged between 0.053 ÷ 0.004 µg g-1 wet weight. Average nickel content in examined organs ranged between 0.326 ÷ 0.023 µg g-1 wet weight. The observed fluctuations are supposed to be a result of intensive growth and accompanying accumulation of metals from water.
The paper evaluates the effect of culture conditions and culture site on levels of certain microelements (Zn, Cu, Fe) and macroelements (Mg, Ca) in three species of freshwater fish: rainbow trout (Oncorhynchus mykiss Walbaum), common carp (Cyprinus carpio L.), and Siberian sturgeon (Acipenser baeri Brandt). The study involved 90 individuals of freshwater fish aged from 6 to 12 months. Samples of blood, liver, kidney, gills, skin and muscles were collected from each fish and subjected to chemical assay of Mg, Ca, Zn, Cu, Fe with inductively coupled plasma-atomic emission spectrometry in a JY-24 Jobin Yvon apparatus. The study revealed that culture site had statistically significant impact on levels of the examined elements among the three fish species. Mg content in kidney and skin was significantly higher in carp than in sturgeon. Similar regularities were observed for Ca content in skin and Zn content in kidney. Liver and kidney levels of Fe and Cu were significantly lower in carp than in rainbow trout. Of all the three examined fish species, rainbow trout had the highest skin levels of Ca and Mg, and the highest blood level of Fe. The results indicate that culture site and culture conditions exerted significant influence on levels of macro- and microelements in freshwater fish.
Obecność polichlorowanych bifenyli w środowisku wodnym, z uwagi na ich trwałość, toksyczność i wysokie współczynniki bioakumulacji, stanowi poważny problem z punktu widzenia ochrony środowiska i toksykologii żywności. Niniejsza praca przedstawia wpływ podstawowych procesów kulinarnych i technologicznych, czyli gotowania, pieczenia i sterylizacji na poziom zawartości PCB w mięsie karpi skażonych Clophenem A50. Oznaczenia poziomu zawartości PCB dokonano metodą chromatograficzną przy użyciu aparatu Chromatron GCHF 18.3 z detektorem ECD. Otrzymane wyniki wskazują, że poszczególne rodzaje obróbki cieplnej wpływają na poziom zawartości tych związków. Największy wzrost koncentracji PCB nastąpił w wyniku pieczenia w naczyniu szklanym, a najmniejszy pod wpływem gotowania.
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