Richard G. Gustafson

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Widespread population extirpations and the consequent loss of ecological, genetic, and life-history diversity can lead to extinction of evolutionarily significant units (ESUs) and species. We attempted to systematically enumerate extinct Pacific salmon populations and characterize lost ecological, life history, and genetic diversity types among six species(More)
Adults of the bivalve species Solemya velum live in symbiosis with chemoautotrophic bacteria in specialized gill bacteriocytes. The bacteria play an essential nutritional role in the mature association, fixing CO2 via the Calvin cycle with energy obtained through the oxidation of reduced sulfur compounds. To understand how the continuity of this partnership(More)
This study presents the first protein electrophoretic study of population structure within the Georgia Basin Pacific hake Distinct Population Segment, as defined under the U.S. Endangered Species Act. Forty-one allozyme loci (29 polymorphic) were analyzed in samples from three Pacific hake spawning populations on the west coast of North America: (1) Port(More)
Archival scales from 603 sockeye salmon (Oncorhynchus nerka), sampled from May to July 1924 in the lower Columbia River, were analysed for genetic variability at 12 microsatellite loci and compared to 17 present-day O. nerka populations-exhibiting either anadromous (sockeye salmon) or nonanadromous (kokanee) life histories-from throughout the Columbia River(More)
All life stages of Pacific herring (Clupea pallasii) utilize much of southeastern Alaska (SEAK) waters as habitat. The beaches used for spawning are not continuous; some are repeatedly utilized, thus the Alaska Department of Fish and Game (ADFG) eventually began to manage herring in these areas as discrete stocks. However, available data do not identify(More)
A.J. Gharrett, S. Keller, R.G. Gustafson, P. Johnson, J.L. Nielsen, J.E. Seeb , L.W. Seeb , W.W. Smoker, G.H. Thorgaard & R.L. Wilmot Fisheries Division, School of Fisheries and Ocean Sciences, University of Alaska Fairbanks, 11120 Glacier Highway, Juneau, AK 99801, U.S.A. (e-mail: ffajg@uaf.edu) Alaska Sea Grant College Program, School of Fisheries and(More)
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