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Organotin and osmoregulation: quantifying the effects of environmental concentrations of sediment-associated TBT and TPhT on the freshwater-adapted European flounder, Platichthys flesus (L.)

Hartl, M.G.J., Hutchinson, S. and Hawkins, L.E. (2001) Organotin and osmoregulation: quantifying the effects of environmental concentrations of sediment-associated TBT and TPhT on the freshwater-adapted European flounder, Platichthys flesus (L.) Journal of Experimental Marine Biology and Ecology, 256, (2), pp. 267-278. (doi:10.1016/S0022-0981(00)00320-8).

Record type: Article

Abstract

Chronic (5 weeks) exposure of freshwater-adapted European flounder, Platichthys flesus (L.), to environmental concentrations of sediment-associated tri-n-butyltin chloride (TBTCl) and triphenyltin chloride (TPhTCl) caused significant changes to hydromineral fluxes and membrane permeability, mechanisms that maintain osmotic homeostasis. The half-time of exchange of tritiated water (THO) in TBTCl- and TPhTCl-exposed fish was significantly increased during the first 2 weeks of the experiment and then decreased steadily, eventually reaching the level that the control group had constantly maintained throughout the experiment. This change in apparent water permeability was accompanied by a significant decrease in diffusional water flux across the membranes. Passive Na+-efflux across the gills was increased significantly but effluxes in the control group were near constant over the same time span. Drinking rates in the organotin groups increased significantly while the rate of urine production did not change. This lead to an increased net water balance in the organotin groups and consequently to a significant reduction of the blood osmolality of both organotin groups when compared to a control. There would appear to be a metabolic cost attached to the changes produced by exposure to environmental levels of organotin compounds which are manifested as a minimal increase in body length compared to the controls.

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More information

Published date: 2001
Keywords: Tri-n-butyltin chloride, Triphenyltin chloride, Sodium flux, Water flux, Estuarine fish

Identifiers

Local EPrints ID: 7982
URI: http://eprints.soton.ac.uk/id/eprint/7982
ISSN: 0022-0981
PURE UUID: 56778740-3262-422e-9e81-5b32eef80e9d
ORCID for L.E. Hawkins: ORCID iD orcid.org/0000-0002-9236-2396

Catalogue record

Date deposited: 23 Aug 2004
Last modified: 17 Jul 2017 17:13

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Contributors

Author: M.G.J. Hartl
Author: S. Hutchinson
Author: L.E. Hawkins ORCID iD

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