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Sodium, net acid and ammonia fluxes in freshwater-adapted European flounder (Platichthys flesus L.) Pharmacological inhibition and effects on gill ventilation volume.

Clarke, A. P. and Potts, W. T. W. (1998) Sodium, net acid and ammonia fluxes in freshwater-adapted European flounder (Platichthys flesus L.) Pharmacological inhibition and effects on gill ventilation volume. Journal of Zoology, 246 (4). pp. 427-432. ISSN 0952-8369

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Abstract

Net branchial sodium uptake, and net acid and ammonia excretion, together with gill ventilation volumes were measured in euryhaline European flounder Platichthys flesus, adapted to freshwater. External amiloride or acetazolamide (0.1 mmol l-1) caused significant reductions (P < 0.05) in sodium uptake and net acid excretion, while 0.05 mmol l-1 thiocyanate had no effect on any of the fluxes measured. Ethoxzolamide (0.1 mmol l-1) however, caused significant reductions in all fluxes measured and also caused a 32% reduction in the volume of water exhaled by the gills. In this study, it appears that sodium uptake and net acid excretion are indirectly linked, probably by a proton pump arrangement which is thought to be a mechanism for sodium uptake in trout gills.

Item Type: Article
Journal or Publication Title: Journal of Zoology
Uncontrolled Keywords: Platichthys flesus • ventilation volume • sodium uptake • net acid excretion • ammonia efflux
Subjects: Q Science > QH Natural history > QH301 Biology
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 10928
Deposited By: Mr Richard Ingham
Deposited On: 28 Jul 2008 09:51
Refereed?: Yes
Published?: Published
Last Modified: 18 Sep 2013 16:00
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/10928

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