Differential fitness of allelic isozymes in the marine gastropods Littorina punctata and Littorina neritoides, exposed to the environmental stress of the combined effects of cadmium and mercury pollution

Batia Lavie, Eviatar Nevo

Research output: Contribution to journalArticlepeer-review

Abstract

The present study tested the separate and the interactive pollution effects of cadmium and mercury on the electrophoretically detected allelic isozyme frequencies of the enzyme phosphoglucose isomerase for two species of littoral marine gastropods -Littorina punctata and L. neritoides - and the enzyme amino peptidase for L. neritoides. Our results indicate differential survivorship of allelic isozyme genotypes specific for each type of pollutant and for their interaction, as well as trends common to all pollutants. Theoretically the results reflect the adaptive nature of at least some allozymic genotypes in these marine gastropods and seem inconsistent with the neutral theory of allozyme polymorphisms. Practically, the results reinforce earlier conclusions that changes in the frequency of allelic isozymes may be used as a genetic monitor of pollution.

Original languageEnglish
Pages (from-to)345-349
Number of pages5
JournalEnvironmental Management
Volume11
Issue number3
DOIs
StatePublished - Jul 1987

Keywords

  • Allelic isozyme polymorphism
  • Genetic monitoring
  • Interactive mercury and cadmium pollution
  • Littorina neritoides
  • Littorina punctata
  • Marine gastropods
  • Selection

ASJC Scopus subject areas

  • Global and Planetary Change
  • Ecology
  • Pollution

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