Genetic relationships among chum salmon populations in southeast Alaska and northern British Columbia (original) (raw)
Related papers
Genetic Diversity Patterns of Chum Salmon in the Pacific Northwest
Canadian Journal of Fisheries and Aquatic Sciences, 1994
We used starch-gel electrophoresis to examine over 13 000 adult chum salmon, Oncorhynchus keta, from 153 collections at 105 locations in Washington, Oregon, and southern British Columbia from 1985-92. We identified 39 variable loci and 36 monomorphic loci. In general, alleles that occurred at a frequency >lo% were found in all locations and were temporally stable within locations. Localized alleles usually occurred at a frequency 66%. Significant allele frequency differences were found among chum salmon Can. J. Fish. Aquat. Sci., VoH. SP(SuppL 4), 1994 6% Can. J. Fish. Aquat. Sci. Downloaded from www.nrcresearchpress.com by 74.121.191.133 on 06/07/13 For personal use only. Can. J. Fish. Aquat. Sci. Downloaded from www.nrcresearchpress.com by 74.121.191.133 on 06/07/13 For personal use only. Can. 9. Fish. Ayuat. Sci., Val. 54(Suppl. I), 4994 Can. J. Fish. Aquat. Sci. Downloaded from www.nrcresearchpress.com by 74.121.191.133 on 06/07/13 For personal use only. = Georgia Strait, FR = Fraser River, WCVI = west coast of Vancouver Island, WAC = Washington coast, ORC = Oregon coast. Can. B. Fish. A q w t . Sci., Vok. Sd(Suppl. d), 6994 75 Can. J. Fish. Aquat. Sci. Downloaded from www.nrcresearchpress.com by 74.121.191.133 on 06/07/13 For personal use only.
Technical report, 2019
To identify critical life history stages for salmon survival, it may be informative to compare adult returns with abundances at various life-history stages. The transitional period from freshwater to saltwater is speculated to be a major source of mortality for salmon and information about early life stages may help reduce uncertainty around survival estimates and future run-size predictions. Past genetic studies demonstrated that relative abundances of Yukon summer-run and fall-run juvenile chum salmon (Oncorhynchus keta) caught on the eastern Bering Sea shelf during late summer/early fall are correlated with adult returns for their respective year classes (Kondzela et al. 2016). We are interested in testing whether earlier life history stages are also correlated with adult returns. Our study provides insights into the relative proportions of summer-run and fall-run juvenile chum salmon that outmigrate from the Yukon River during the spring/summer period.
Ecology and Evolution, 2013
Low genetic divergence at neutral loci among populations is often the result of high levels of contemporary gene flow. Western Alaskan summer-run chum salmon (Oncorhynchus keta) populations demonstrate weak genetic structure, but invoking contemporary gene flow as the basis for the low divergence is problematic because salmon home to their natal streams and some of the populations are thousands of kilometers apart. We used genotypes from microsatellite and single nucleotide polymorphism loci to investigate alternative explanations for the current genetic structure of chum salmon populations from western Alaska. We also estimated current levels of gene flow among Kuskokwim River populations. Our results suggest that weak genetic structure is best explained by physical connections that occurred after the Holocene Thermal Maximum among the Yukon, Kuskokwim, and Nushagak drainages that allowed gene flow to occur among now distant populations.
2011
The Fishery Manuscript series was established in 1987 by the Division of Sport Fish for the publication of technically-oriented results of several years' work undertaken on a project to address common objectives, provide an overview of work undertaken through multiple projects to address specific research or management goal(s), or new and/or highly technical methods, and became a joint divisional series in 2004 with the Division of Commercial Fisheries. Fishery Manuscripts are intended for fishery and other technical professionals. Fishery Manuscripts are available through the Alaska State Library and on the Internet http://www.adfg.alaska.gov/sf/publications/ This publication has undergone editorial and peer review.
2021
The National Marine Fisheries Service's Alaska Fisheries Science Center uses the NOAA Technical Memorandum series to issue informal scientific and technical publications when complete formal review and editorial processing are not appropriate or feasible. Documents within this series reflect sound professional work and may be referenced in the formal scientific and technical literature. The NMFS-AFSC Technical Memorandum series of the Alaska Fisheries Science Center continues the NMFS-F/NWC series established in 1970 by the Northwest Fisheries Center. The NMFS-NWFSC series is currently used by the Northwest Fisheries Science Center.
Conservation Genetics, 2006
The lower Columbia River drainage once supported a run of over a million chum salmon. By the late 1950s, the run had decreased to often a few hundred fish. With the exception of Grays River near the coast and an aggregation of chum salmon spawning in creeks and the main stem near Bonneville Dam in the Columbia Gorge, most populations were thought to be extinct. However, chum salmon consistently return in low numbers to tributaries originating in the Cascade Range: the Cowlitz, Lewis, and Washougal rivers. To assess whether Cascade spawners were strays or remnants of former populations, chum salmon from the Coastal, Cascade and Gorge ecoregional zones were characterized at 17 microsatellite loci. Significant heterogeneity in genotype distributions was detected between zones and collections formed regional groups in a neighbor-joining tree. Cascade collections had higher allelic richness and private alleles, and the Cowlitz River supported genetically divergent fall and summer runs, the only summer chum salmon run extant in the Columbia River drainage. We propose that chum salmon in the Cascade zone are remnants of original populations. We attribute the divergence between zonal groups to diverse ecological conditions in each zone, which promoted regional genetic adaptation, and to genetic drift experienced in small populations.
Genetic Stock Identification of Chinook Salmon Harvest on the Yukon River 2008
2010
This investigation was financed by the United States Yukon River Research and Management Fund under project USRM 08-08, the Yukon River Restoration and Enhancement Fund under project 19N-08, and the State of Alaska. ADF&G Fishery Data Series was established in 1987 for the publication of Division of Sport Fish technically oriented results for a single project or group of closely related projects, and in 2004 became a joint divisional series with the Division of Commercial Fisheries. Fishery Data Series reports are intended for fishery and other technical professionals and are available through the Alaska State Library and on the Internet: http://www.sf.adfg.state.ak.us/statewide/divreports/html/intersearch.cfm This publication has undergone editorial and peer review.
2016
A genetic analysis of samples from the Chinook salmon (Oncorhynchus tshawytscha) bycatch of the 2014 Gulf of Alaska (GOA) trawl fisheries for walleye pollock (Gadus chalcogrammus), rockfish (Sebastes spp.), and arrowtooth flounder (Atheresthes stomias) was undertaken to determine the stock composition of the sample sets. Samples were genotyped for 43 single nucleotide polymorphism (SNP) DNA markers and results were estimated using the Alaska Department of Fish and Game (ADF&G) SNP baseline. In 2014, genetic samples were collected from Chinook salmon taken in the bycatch of the Gulf of Alaska (GOA) pollock trawl fisheries using a simple random sample protocol with trip being the primary unit. This is the first year for this sampling protocol and resulted in the largest available genetic sample set to date with 10.7% of the salmon bycatch successfully genotyped. Based on the analysis of 1,163 Chinook salmon bycatch samples, British Columbia (43%), West Coast U.S. (35%), Coastal Southe...