Volume 55, Issue 8 pp. 1678-1685
Free Access

HISTORICAL POPULATION SIZE CHANGE OF BOWHEAD WHALES INFERRED FROM DNA SEQUENCE POLYMORPHISM DATA

Alejandro P. Rooney

Alejandro P. Rooney

Mississippi State University, Department of Biological Sciences, Mississippi State, Mississippi 39762 E-mail: [email protected]

The Pennsylvania State University, Institute of Molecular Evolutionary Genetics, Department of Biology, 328 Mueller Laboratory, University Park, Pennsylvania 16802

Texas A&M University, College of Veterinary Medicine, Department of Veterinary Pathobiology, College Station, Texas 77843-4467

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Rodney L. Honeycutt

Rodney L. Honeycutt

Texas A&M University, College of Veterinary Medicine, Department of Veterinary Pathobiology, College Station, Texas 77843-4467

Texas A&M University, Department of Wildlife & Fisheries Sciences, College Station, Texas 77843-2258

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James N. Derr

James N. Derr

Texas A&M University, College of Veterinary Medicine, Department of Veterinary Pathobiology, College Station, Texas 77843-4467

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First published: 09 May 2007
Citations: 58

Abstract

Abstract.— Nucleotide sequence data from the mitochondrial control region were used from a phylogenetic context to investigate the long-term history of a population of bowhead whales (Balaena mysticetus). In addition, the coalescence time of these sequences was used to estimate the age of the inferred patterns of population size change. The results indicate that mitochondrial genetic polymorphism was not affected by a recent bottleneck that occurred near the turn of the 20th century, thereby preserving the signature of historical population size change in the mitochondrial genome. Further analysis showed that this population underwent an expansion initiated in the Middle to Late Pleistocene. As such, early Holocene changes in Arctic sea ice distribution appear to have had little influence on patterns of genetic variability in this population.

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