Allozyme genotype in mosquitofish, Gambusia holbrooki , during mercury exposure: Temporal stability, concentration effects and field verification

Heagler, M. G.; Newman, M. C.; Mulvey, M.; Dixon, P. M.

doi:10.1002/etc.5620120218

Allozyme genotype in mosquitofish, Gambusia holbrooki , during mercury exposure: Temporal stability, concentration effects and field verification

Journal Article · Mon Feb 01 00:00:00 EST 1993 · Environmental Toxicology and Chemistry

DOI:https://doi.org/10.1002/etc.5620120218· OSTI ID:2496763

Heagler, M. G.; Newman, M. C.; Mulvey, M.; Dixon, P. M.

Abstract

Genotype frequencies at nine enzyme loci were examined in a population of mosquitofish, Gambusia holbrooki, during acute inorganic mercury exposure at three concentrations. Genotype at one locus, glucose phosphate isomerase-2 (Gpi-2), was correlated with time to death (TTD) at the low (0.83 mg/L) mercury concentration, but genotypes at none of the nine loci were related to TTD at the medium (1.07 mg/L) or the high (1.13 mg/L) mercury concentration. A survey of mosquitofish from a mercury-contaminated canal was undertaken to determine if the results of laboratory exposures could be used to predict accurately the genetic profile of mercury-contaminated field populations. Mosquitofish collected from the contaminated canal had a significantly lower frequency of the Gpi-238 allele than mosquitofish collected from the adjacent noncontaminated river. The Gpi-2 allozymes may be useful as an indicator of pollutant stress if used in conjunction with a thorough understanding of the structure and history of the population.

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Sponsoring Organization:: USDOE

OSTI ID:: 2496763

Journal Information:: Environmental Toxicology and Chemistry, Journal Name: Environmental Toxicology and Chemistry Journal Issue: 2 Vol. 12; ISSN 0730-7268

Publisher:: Oxford University PressCopyright Statement

Country of Publication:: United States

Language:: English

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