Please use this identifier to cite or link to this item:
Title: Crude oil exposure affects air-breathing frequency, blood phosphate levels and ion regulation in an air-breathing teleost fish, Hoplosternum littorale
Authors: Brauner, Colin John
Ballantyne, C. L.
Vijayan, Mathilakath M.
Val, Adalberto Luis
Keywords: Adenosine Triphosphate
Guanosine Triphosphate
Animals Experiment
Gas Exchange
Potassium Transport
Priority Journal
Water Pollutants, Chemical
Issue Date: 1999
metadata.dc.publisher.journal: Comparative Biochemistry and Physiology - C Pharmacology Toxicology and Endocrinology
metadata.dc.relation.ispartof: Volume 123, Número 2, Pags. 127-134
Abstract: Exposure of a facultative air breather, Hoplosternum littorale, to 12.5, 25, and 37.5% of the water soluble fraction (WSF) of Urucu crude oil, resulted in a rapid increase in air-breathing frequency (ABF) sustained over the 45 min period of exposure. Following 4 h exposure to a graded increase in WSF up to 50%, there was no significant affect on haematocrit, or plasma [Na+] and [K+]. Crude oil ingestion resulted in some degree of ion regulatory impairment, however results were variable. A single oral dose of 3.0 ml/kg of Urucu crude elevated net whole body Na+ efflux and resulted in a 7% reduction in plasma [Na+] 72 h following ingestion. A single oral dose of 3.0 ml/kg resulted in a significant net whole body K+ efflux and a reduction in plasma [K+] 24 h after ingestion. No mortalities were observed in any exposure regime in this study. An oral dose of Urucu crude oil at 3.0 ml/kg also resulted in a 24% reduction in ATP:Hb ratio (from 0.206 to 0.157) and a 31% reduction in GTP:Hb ratio (0.455 to 0.315) 24 h following ingestion indicating that these fish may be hypoxemic. Taken together, these results indicate that exposure of H. littorale to Urucu crude oil affects gas exchange and ion regulation. Copyright (C) 1999 Elsevier Science Inc.
metadata.dc.identifier.doi: 10.1016/S0742-8413(99)00018-3
Appears in Collections:Artigos

Files in This Item:
There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.