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Tolerance to heavy metals in Littorina saxatilis from a metal contaminated estuary in the Isle of Man

Tolerance to heavy metals in Littorina saxatilis from a metal contaminated estuary in the Isle of Man
Tolerance to heavy metals in Littorina saxatilis from a metal contaminated estuary in the Isle of Man
Population differences were measured in the tolerance of Littorina saxatilis from sites around the Isle of Man, to acute exposure to zinc, lead, copper and cadmium. Animals from a site influenced by disused mine run-off in Laxey estuary (high zinc) were compared with animals from less contaminated estuaries (Peel-high lead, but lower zinc), and the relatively uncontaminated Castletown and Ramsey estuaries, plus the open coast near Derbyhaven. Median lethal times (LT50) were estimated for each test concentration (5, 10, 20 mg l?1 Zn; 5, 10 mg l?1 Pb; 0·5, 1·0, 2·0 mg l?1 Cu and Cd) except for those that did not produce sufficient mortalities. Individuals from Laxey estuary showed significantly higher tolerances to zinc (10 mg l?1) and lead (5 mg l?1) than animals from the unpolluted sites. No co-tolerance to copper or cadmium was apparent. Population tolerance to zinc was correlated with reduced accumulation rates. Lead tolerance may result from the ability of the tolerant individuals to sequester the metal and detoxify it in their tissues; the littorinids from Laxey had significantly higher rates of lead accumulation.
0025-3154
393-400
Daka, Erema R.
5fe6c90d-d4f0-4485-a348-a2d4adb03466
Hawkins, Stephen J.
758fe1c1-30cd-4ed1-bb65-2471dc7c11fa
Daka, Erema R.
5fe6c90d-d4f0-4485-a348-a2d4adb03466
Hawkins, Stephen J.
758fe1c1-30cd-4ed1-bb65-2471dc7c11fa

Daka, Erema R. and Hawkins, Stephen J. (2004) Tolerance to heavy metals in Littorina saxatilis from a metal contaminated estuary in the Isle of Man. Journal of the Marine Biological Association of the United Kingdom, 84 (2), 393-400. (doi:10.1017/S0025315404009336h).

Record type: Article

Abstract

Population differences were measured in the tolerance of Littorina saxatilis from sites around the Isle of Man, to acute exposure to zinc, lead, copper and cadmium. Animals from a site influenced by disused mine run-off in Laxey estuary (high zinc) were compared with animals from less contaminated estuaries (Peel-high lead, but lower zinc), and the relatively uncontaminated Castletown and Ramsey estuaries, plus the open coast near Derbyhaven. Median lethal times (LT50) were estimated for each test concentration (5, 10, 20 mg l?1 Zn; 5, 10 mg l?1 Pb; 0·5, 1·0, 2·0 mg l?1 Cu and Cd) except for those that did not produce sufficient mortalities. Individuals from Laxey estuary showed significantly higher tolerances to zinc (10 mg l?1) and lead (5 mg l?1) than animals from the unpolluted sites. No co-tolerance to copper or cadmium was apparent. Population tolerance to zinc was correlated with reduced accumulation rates. Lead tolerance may result from the ability of the tolerant individuals to sequester the metal and detoxify it in their tissues; the littorinids from Laxey had significantly higher rates of lead accumulation.

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Published date: 2004

Identifiers

Local EPrints ID: 188385
URI: http://eprints.soton.ac.uk/id/eprint/188385
ISSN: 0025-3154
PURE UUID: 7743b47f-bfcb-47dc-aa08-5f20c96d5580

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Date deposited: 24 May 2011 13:39
Last modified: 14 Mar 2024 03:31

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Author: Erema R. Daka

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