The Freshwater Clam as a Biological Indicator of Radiomanganese

Merlini, M.

doi:10.1016/b978-0-08-012122-2.50101-8

Cited by 5 publications

(6 citation statements)

References 6 publications

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“…However, a corresponding higher tissue concentration was not observed in samples taken at this station due to the presence of non-ionic manganese. Merlini et al, (1965) and Merlini (1966) reported that the concentration of the manganese in an animal depends on the availability of manganese in the ionic form Mn++ which is an absorbable form in living systems. This would explain the higher concentration of manganese found at both stations.…”

Section: Discussionmentioning

confidence: 98%

“…Similarly, freshwater bivalves belonging to Unionidae (Naiades) are generally viewed as reliable indicators of contamination, because they are sedentary and easy for repeated observations, occupy the pivotal position as a primary consumer in the food chain and withstand a high rate of accumulation of contaminants (Fuller, 1974;Forester, 1980;McCleneghan et al, 1981;Havlik and Marking, 1987). The metals of zinc, manganese, copper and cadmium have been the most frequently studied in the Unionid bivalves (Johnson et al, 1966; 57 58 P. SHAHUL HAMEED and A. ISAAC MOHAN RAJ Merlini, 1966;Pate1 and Doshi, 1971;Anderson, 1977;Forester, 1980;Schmitt and Finger, 1982). The biomonitoring of metal contamination has become necessary in the river systems owing to increasing loads of metal discharges.…”

Section: Introductionmentioning

confidence: 97%

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Freshwater Mussel,Lamellidens Marginalis(Lamarck) (Mollusca: Bivalvia: Unionidae) As an Indicator of River Pollution

Hameed¹,

Raj²

1990

Chemistry and Ecology

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Analyses were made of heavy metals, manganese, nickel, copper, zinc and lead in water samples and soft body, shell and different tissues (gills, digestive glands, mantle and viscera) of the Unionid mussel, Lamellidens marginalb, collected from two tributaries of the Cauvery river. Water samples from Station I contained higher concentrations of the metals than those from Station 11. The concentration of metals in water at both stations were in the descending order: Mn > Zn > Pb > Ni > Cu. However, the concentrations of metals in the soft body were in the descending order: Z n > M n > P b > N i > C u at both stations in all size groups of mussels tested. The concentration of zinc maintained a linear relationship with the size of the mussels, but manganese showed a reverse trend. Small size (4-5 cm) mussels accumulated more manganese (105.5 pg.g-' dry wt.) than larger ones (7-8cm; 6.5 pg.g-' dry wt.). Both young and old r-1;-ts accumulate the same level of lead, copper and nickel in the soft body. The order of concentratiom of metals (Mn, Pb, Zn, Ni and Cu) in the shell of mussels from both stations coincided with the order of concentrations of background water except for lead. The accumulation of lead was higher in shell (30.4-36.2 pg.g-' dry wt.) than in soft body (6.4-12.0 pg.g-' dry wt.). The pattern of concentration of metals in the various tissues reveal that the digestive glands have greater ability than other tissues to concentrate most metals under study. The concentration factors for soft body, shell and different tissues are presented. The advantages in using the common mussel for biomonitoring of contaminants in water is also discussed.

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Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 97%

Freshwater Mussel,Lamellidens Marginalis(Lamarck) (Mollusca: Bivalvia: Unionidae) As an Indicator of River Pollution

Hameed¹,

Raj²

1990

Chemistry and Ecology

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“…The higher accumulative ability of this organ with regard to heavy metals (Mn, Ni, Cu, Zn and Pb) has also been demonstrated by Hameed and Mohanraj (1989). Merlini 1967) reported that the gills and mantle showed a high concentration factor for h 4 n . However, this author did not look into the digestive glands.…”

Section: Downloaded By [Michigan Statementioning

confidence: 98%

“…It is particularly efficient in accumulating transuranic nuclides and other radionuclides present in the estuarine environment (Goldberg et al, 1978). Similarly, freshwater bivalves of the family Unionidae are also viewed as reliable indicators of contamination by heavy metals (Hameed and Mohanraj, 1990), and radionuclides (Merlini, 1967;Ravera and Vido, 1961). Like their counterparts in the marine ecosystem, freshwater mussels are fixed to the site for easy and repeated observation and remain at the sediment-water interface, besides occupying a pivotal position as primary consumers in the food chain.…”

Section: Introductionmentioning

confidence: 97%

The Freshwater MusselParreysia Favidens(Benson) As A Biological Indicator of Polonium - 210 in A Riverine System

Hameed¹,

Asokan²,

Iyengar

et al. 1993

Chemistry and Ecology

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“…Fallout Mn 54 has been correlated with stable manganese in the tissues and organs of the molluscs U nio 1'1UJ,ncus var. elongatulus (Pfeiffer), a bivalve from the subalpine lakes of Northern Italy (Ravera and Vido 1961;Merlini 1966), and in the terrestrial slug Arion rufus L. (Cavallaro and Ravera 1965) . The possibility of studying these same nuclides in animals of different phyla occupying different trophic levels, but from the same environment, presented itself when a study of the movement of radionuclides in irrigated ecosystems of the Po Valley was carried out in 1964 (Bourdeau et al 1965).…”

Section: Introductionmentioning

confidence: 99%

Stable Manganese and Fallout Radiomanganese in Animals from Irrigated Ecosystems of the Po Valley

Cavalloro¹,

Merlini²

1967

Ecology

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Stable manganese and radioactive manganese (Mn54 from fallout) were determined in samples of snakes, fishes, frogs, tadpoles, insects, worms, and molluscs from five sites in flooded rice fields and/or irrigated meadows of the Po Valley, Italy for a period of 1 year. Animals in the second trophic level generally contained more nuclides than the other organisms. High amounts of both stable and radiomanganese were noted for tadpoles, insects, and molluscs, with large variations in the quantities of nuclides based on the site of collection. Stable and radiomanganese concentrations in frogs and fishes were less and varied little from site to site. Fishes showed a decrease in the amount of the nuclides with a change of season. Tadpoles had consistently higher amounts of both stable and radiomanganese than the frogs, and there was a sharp decrease in nuclide concentration with the onset of metamorphosis. There was a reduction in concentration of both nuclides going through the direct three—step food chain from insects to frogs to the water snake. The various factors involved in stable and radiomanganese accumulation by aquatic organisms are discussed.

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The Freshwater Clam as a Biological Indicator of Radiomanganese

Cited by 5 publications

References 6 publications

Freshwater Mussel,Lamellidens Marginalis(Lamarck) (Mollusca: Bivalvia: Unionidae) As an Indicator of River Pollution

Freshwater Mussel,Lamellidens Marginalis(Lamarck) (Mollusca: Bivalvia: Unionidae) As an Indicator of River Pollution

The Freshwater MusselParreysia Favidens(Benson) As A Biological Indicator of Polonium - 210 in A Riverine System

Stable Manganese and Fallout Radiomanganese in Animals from Irrigated Ecosystems of the Po Valley

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