Allozyme Genotype and Differential Resistance to Mercury Pollution in the Caddisfly,Nectopsyche albida. I. Single-Locus Genotypes

Author:

Benton Michael J.,Guttman Sheldon I.

Abstract

The caddisfly, Nectopsyche albida, was exposed to 0.6 mg mercury nitrate/L for 72 h and individual times to death recorded. All individuals were analyzed electrophoretically at six polymorphic loci. Time to death differed significantly among genotypes at the phosphoglucomutase and two alcohol dehydrogenase loci and among levels of heterozygosity. There is substantial evidence suggesting that many taxa possess allozyme genotypes exhibiting differential sensitivity to anthropogenic contaminants and natural stressors. Elimination of sensitive genotypes may reduce the ability of impacted populations to recover from additional impacts and may lessen the likelihood that they will adapt to slowly changing environmental conditions. Accordingly, we emphasize that (1) genetic standardization of bioassay organisms is necessary to assure consistency of results among testing facilities, (2) genetic monitoring may be a more sensitive method than numerical censusing to detect low levels of anthropogenic pollution, and (3) loss of genetic variation may hinder population persistence.

Publisher

Canadian Science Publishing

Subject

Aquatic Science,Ecology, Evolution, Behavior and Systematics

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3