Heavy metals toxicity and bioaccumulation patterns in the body organs of four fresh water fish species (original) (raw)
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Laboratory experiments were conducted to ascertain the acute toxicity of chromium (Cr), cobalt (Co), copper (Cu) and nickel (Ni) for three carnivorous fish species viz. Channa marulius, Mystus seenghala and Wallago attu. During acute exposure, the tendency of these fish species to accumulate metals has also been determined. Mean sensitivity of three fish species, determined in terms of 96 h LC50, towards metals was Cu>Cr>Co>Ni. During both 96 h LC50 and lethal concentrations, the accumulation pattern of metals in the organs of all the three fish species was liver>kidney>gills>blood>muscle. However, bioaccumulation tendency of all metals in the fish organs showed positive dependence on their uptake affinity. Among the three fish species, C. marulius exhibited significantly higher ability to bio-accumulate all metals in its body followed by W. attu and M. seenghala. The variable accumulation patterns of all the four metals in three fish species were correlated positively (p<0.05) to their sensitivity towards toxicity of metals.
Comparative approaches to understand metal bioaccumulation in aquatic animals
Comparative Biochemistry and Physiology Part C: Toxicology & Pharmacology, 2008
Over the past decades, comparative physiology and biochemistry approaches have played a significant role in understanding the complexity of metal bioaccumulation in aquatic animals. Such a comparative approach is now further aided by the biokinetic modeling approach which can be used to predict the rates and routes of metal bioaccumulation and assist in the interpretation of accumulated body metal concentrations in aquatic animals. In this review, we illustrate a few examples of using the combined comparative and biokinetic modeling approaches to further our understanding of metal accumulation in aquatic animals. We highlight recent studies on the different accumulation patterns of metals in different species of invertebrates and fish, and between various aquatic systems (freshwater and marine). Comparative metal biokinetics can explain the differences in metal bioaccumulation among bivalves, although it is still difficult to explain the evolutionary basis for the different accumulated metal body concentrations (e.g., why some species have high metal concentrations). Both physiological/biochemical responses and metal geochemistry are responsible for the differences in metal concentrations observed in different populations of aquatic species, or between freshwater and marine species. A comparative approach is especially important for metal biology research, due to the very complicated and potentially variable physiological handling of metals during their accumulation, sequestration, distribution and elimination in different aquatic species or between different aquatic systems.
Metal Concentration in Fresh Water Fish Organs
Open Journal of Metal, 2013
This study was conducted during March to May of 2010 dry season, giving prime thrust to determine the metal concentrations in commercial fish species of Catla catla and Labeo rohita, collected from various points along the river Cauvery. The liver, gill and muscle tissues of fish were analyzed for Fe, Pb, Zn, Ni, Mn, Cu, Cr and Cd using Atomic Absorption Spectrophotometry (AAS-model: 6300). The Catla catla has shown more accumulation potency for all the metals than Labeo rohita. The liver in both fish species has better accretion capacity compared to gill and muscle and the same was noticed by bioaccumulation factor. The results of bioaccumulation factor were in the order of Ni > Zn > Cu > Mn > Fe > Cr > Pb > Cd. Elevated trend was noticed among the essential metals and decreased trend among the nonessential metals were observed in both fish species.
Heavy Metals in the Environmental and its effects on fish
2017
The heavy metal concentration in fish tissues reflects past exposure via water and/or food and it can demonstrate the Current situation of the animals before toxicity affects the ecological balance of populations in the aquatic environment. Also, heavy metals are known to induce oxidative stress and/ or carcinogenesis by mediating free radicals/reactive oxygen species. In general, metals can be categorized as biologically essential and non-essential. The nonessential metals (e.g., aluminum (Al), cadmium (Cd), mercury (Hg), tin (Sn) and lead (Pb) have no proven biological function (also called xenobiotics or foreign elements), and their toxicity rises with increasing concentrations [3]. Essential metals (e.g., copper (Cu), zinc (Zn), chromium (Cr), nickel (Ni), cobalt (Co), molybdenum (Mo) and iron (Fe)) on the other hand, have a known important biological roles, and toxicity occurs either at metabolic deficiencies or at high concentrations
Effects of heavy metals (Cd, Cu, Cr, Pb, Zn) on fish glutathione metabolism
Environmental Science and Pollution Research, 2014
Tilapia zilli were exposed to the same concentration (1 mg/L) of essential (Cu, Zn) and non-essential (Cd, Pb) metals for 10 days so that these metals would accumulate in the liver, gill, brain and muscle tissues. Subsequently, the animals were transferred to uncontaminated water for a period of elimination, during which samples were taken at days 1, 7, 15 and 30.
Changes in serum biochemistry of fish, Catla catla in response to metal toxicity
2020
In the present study an attempt has been made to evaluate the effect of heavy metals i.e. nickel (Ni) and zinc (Zn) on the serum biochemical parameters of Catla catla . The fish were exposed to lethal concentrations (96-hr LC 50 ) of selected metals. The studied serum biochemical parameters were sodium (Na), potassium (K), chloride (Cl), albumin (Alb), urea (U), glucose (Glu), aspartate aminotransferase (Ast) and alanine aminotransferase (Alt). Results revealed a decrease in Na, Cl and Alb levels of metal exposed fish at all exposure periods as compared to control. However, an increase in K, U, Glu, Ast and Alt levels was observed in the metal exposed fish. All the biochemical parameters showed significant dependence on exposure durations in both treated fish except Na and Alb in Zn treated fish. This study indicated that the alterations in serum biochemical parameters may be the result of the target tissue damage and dysfunction induced by the metal and that these parameters can t...
The present paper aims to assess the concentrations of Zn, Cu, Pb and Cd in the muscle of commercially important fin fishes namely Tenualosa ilisha, Liza parsia, Liza tade and Pampus argenteus. The fin fish species accumulated metals as per the order Liza tade > Liza parsia > Tenualosa ilisha > Pampus argenteus. The metals accumulated as per the order Zn >
Crayfish accumulate trace metals, which is why they often serve as environmental indicators. Among heavy metals, Hg, Cd and Pb are considered toxic substances, while Fe, Zn, Cu, Cr, Ni, Mn, V, Al and Li are involved in vital functions, which makes them essential elements in animal organisms.