Toxicant Extraction Efficiency and Branchial NaCl Fluxes in Lampreys Exposed to Kepone super( registered )

The lipophilic organochlorine insecticide Kepone was used to measure the extraction efficiency of freshwater larval lampreys. Carbon-14 labeled Kepone and a mass balance approach were used to check extraction against amounts of Kepone accumulated by the lampreys. An extraction of 60% was the maximum...

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Bibliographic Details
Published in:Archives of environmental contamination and toxicology 1990-05, Vol.19 (3), p.307-307
Main Authors: Mallatt, Jon, Stinson, Colleen
Format: Article
Language:English
Subjects:
Freshwater
Petromyzon marinus
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Summary:The lipophilic organochlorine insecticide Kepone was used to measure the extraction efficiency of freshwater larval lampreys. Carbon-14 labeled Kepone and a mass balance approach were used to check extraction against amounts of Kepone accumulated by the lampreys. An extraction of 60% was the maximum efficiency with which the organic compounds were extracted by the gills. Over a 2 hr exposure period efficiency fell slowly and steadily. Kepone may have affected the permeability properties of cell membranes. Extraction efficiency declined as ventilatory volume increased. The chlorine ion influx rate across the gills into the pharynx declined 40% in the presence of Kepone, but the sodium ion influx and both effluxes were unaffected. This unexpected result may indicate that lampreys are especially tolerant to the toxic effects of Kepone.
ISSN:0090-4341