Skip Navigation

This Article
Right arrow FREE Full Text (PDF) Freely available
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrow Search for citing articles in:
ISI Web of Science (23)
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Avise, J. C.
Right arrow Articles by Asmussen, M. A.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Avise, J. C.
Right arrow Articles by Asmussen, M. A.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

The Journal of Heredity 1997:88(1):14-20
© 1997 The American Genetic Association 88:14-20

research-article

Cytonuclear Introgressive Swamping and Species Turnover of Bass After an Introduction

J. C. Avise, P. C. Pierce, M. J. Van Den Avyle, M. H. Smith, W. S. Nelson, and M. A. Asmussen

From the Department of Genetics, University of Georgia Athens, GA 30602
the Georgia Cooperative fish and Wildlife Research unit
the National Biological Service
Daniel B. Warnell School of Forest Resources, University of Georgia Athens, Georgia and the Savannah River Ecology Laboratory Alken, South Carolina

Abstract

Species-specific RFLP markers from mitochondrial DNA (mtDNA) were identified and employed in conjunction with previously reported data for nuclear allozyme markers to examine the genetic consequences of an artificial introduction of spotted bass (Micropterus punctulatus) into a north Georgia reservoir originally occupied by native smallmouth bass (M. dolomieul). The cytonuclear genetic data indicate that within 10–15 years following the unauthorized Introduction, a reversal in these species' abundances has occurred and that more than 99% of the population sample analyzed here consists of spotted bass or products of interspecific hybridization. This demographic shift, perhaps ecologically or environmentally mediated, has been accompanied by introgressive swamping; more than 95% of the remaining smallmouth bass nuclear and cytoplasmic alleles are present in individuals of hybrid ancestry. Dilocus cytonuclear disequilibria were significantly different from zero, with patterns indicative of an excess of homospecific genetic combinations (relative to expectations from single-locus allelic frequencies) and a disproportionate contribution of smallmouth bass mothers to the hybrid gene pool. Results document dramatic genetic and demographic changes following the human-mediated introduction of a nonnative species.


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?


This article has been cited by other articles:


Home page
 J HeredHome page
K. J. Monsen, B. M. Honchak, S. E. Locke, and M. A. Peterson
Cytonuclear Disequilibrium in Chrysochus Hybrids Is Not Due to Patterns of Mate Choice
J. Hered., July 9, 2007; (2007) esm039v1.
[Abstract] [Full Text] [PDF]

Home page
 Am. J. Bot.Home page
L. Xiang, C. R. Werth, S. N. Emery, and D. E. McCauley
Population-specific gender-biased hybridization between Dryopteris intermedia and D. carthusiana: evidence from chloroplast DNA
Am. J. Botany, August 1, 2000; 87(8): 1175 - 1180.
[Abstract] [Full Text]

Home page
 GeneticsHome page
C. S. Babcock and M. A. Asmussen
Effects of Differential Selection in the Sexes on Cytonuclear Dynamics: Life Stages With Sex Differences
Genetics, August 1, 1998; 149(4): 2063 - 2077.
[Abstract] [Full Text] [PDF]


Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.