Metal accumulation and metallothionein induction in the spotted dogfish Scyliorhinus canicula
| Autor: | Amit Kumar Sinha, Isabelle Lardon, G. De Boeck, Ronny Blust, R. Bobbaers, Marleen Eyckmans |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: |
Fish Proteins
Gill Time Factors Physiology chemistry.chemical_element Metal toxicity Biochemistry Scyliorhinus canicula (Linnaeus 1758) Nickel Scyliorhinus canicula Cadmium Compounds Animals Metallothionein Tissue Distribution Biology Molecular Biology Chondrichthyes Cadmium Nitrates biology Ecology Aquatic animal Water-Electrolyte Balance biology.organism_classification Bioaccumulation Molecular biology Up-Regulation Lead Heavy metals chemistry Dogfish Metals Toxicity Osmoregulation Body Burden Silver Nitrate Copper Water Pollutants Chemical Elasmobranchii |
| Zdroj: | Comparative biochemistry and physiology : A : molecular & integrative physiology %2C+%3Cb%3E%3Ci%3Ein%3C%2Fi%3E%3C%2Fb%3E%3A+Mees%2C+J.+%3Ci%3Eet+al.%3C%2Fi%3E+%28Ed.%29+%3Ci%3EBook+of+abstracts%3A+an+overview+of+marine+research+in+Belgium+anno+2009.+10th+VLIZ+Young+Scientists%27+Day.+Special+edition+at+the+occasion+of+10+years+VLIZ.+VLIZ+Special+Publication%2C%3C%2Fi%3E+43%3A+pp.+40 |
| ISSN: | 1095-6433 |
| Popis: | article i nfo Keywords: Elasmobranch Chondrichthyes Shark Nickel Cadmium Lead Silver Copper Urea Recent studies indicate that elasmobranch fish respond differently to metal exposure than marine teleosts. Accumulation rates can be high, which despite the fact that normal background levels for metals in the marine environment are low, is worrying due to the long life span and late fecundity of most shark. The goals of the present study were to examine differences in accumulation rates and toxicity of a range of metals at equimolar concentrations (10 µM) in the Mediterranean or spotted dogfish, Scyliorhinus canicula. For this purpose, we exposed the dogfish to Ni (587 µg/L), Cd (1124 µg/L), Pb (2072 µg/L), Cu (635 µg/L), and Ag (1079 µg/L and two additional exposures at 10 µg/L and 1 µg/L) for one week and measured total metal accumulation, metallothionein induction, and parameters related to osmoregulation. Our study confirms the high toxicity and accumulation rates of Ag for elasmobranch fish, even at levels 100 to 1000 times lower than exposure levels of other metals. Also Pb accumulated readily in all organs, but did not cause any osmoregulatory disturbance at the exposure levels used. Ni and Cd seem to accumulate primarily in the kidney while Cu mainly accumulated in liver. In contrast to Ni and Cd, the three other metals Ag, Cu and Pb accumulated in the rectal gland, an important organ for osmoregulation and possible target organ for metal toxicity. Only Cu succeeded in initiating a protective response by inducing MT synthesis in liver and gills. |
| Databáze: | OpenAIRE |
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