Abstract: This layer is exported from LG_chum GIS layer from the Conservation Genetics Laboratory, US Fish and Wildlife Service, Anchorage, Alaska. The layer depicts landscape genetic population groups defined by genetic and geographic data using Spatial Analysis of Molecular Variance (SAMOVA, Dupanloup et al. 2002 Molecular Ecology 11:1271-1281). This method incorporates spatial data (e.g., latitude and longitude) to group populations such that the genetic difference among populations within groups is minimized while the genetic difference among population groups is maximized. The result is often groups of populations that are both geographically and genetically distinct. Our results revealed six population groups, of which two were relatively large in terms of population number and area. The largest group (group one, 32 populations) included coastal populations from Norton Sound, the lower Yukon River and most of the Kuskokwim River. Population group two (14 populations) was also relatively large and included populations from the middle and upper Yukon River. The remaining four groups consisted of one or two isolated populations in the upper Kuskokwim and Yukon rivers. This analysis suggests that hierarchical population structure occurs primarily along a latitudinal axis (east-west) which is dominated by the Yukon River, rather than the much shorter longitudinal axis (north-south) that defines the relative position of the three major watersheds (Norton Sound and the Yukon and Kuskokwim rivers). This spatial orientation (coastal - inland) was also observed in Chinook and coho salmon. The layer also contains collection site data including values from overlaying environmental layers and summary genetic data (principle component, mean Fst using the method of Foll and Gagiotti 2006 Genetics 174:875-891, mean heterozygosity) for chum salmon.

Purpose: To assess if the three major watersheds (Norton Sound and the Yukon and Kuskokwim rivers) are the primary determinant of hiearchical population structure for chum salmon and to assess if the patterns of hierarchical structure in Chinook, chum, and coho salmon are congruent.

Publication Date: October 2009

Originator: USFWS, Conservation Genetics Laboratory, 1011 East Tudor Road, Anchorage, Alaska 99503

Online citation: \\KODIAK\I$\ProjectData\USFWS_CGL\CGL_LG_Data.mdb

Bounding coordinates:
West: -166.509318
East: -130.788798
North: 67.186676
South: 58.072988

Place Keywords: Yukon River, Kuskokwim River, Norton Sound, Alaska, Yukon

Theme Keywords: salmon, genetics, Chinook, Chum, Coho

Projection: NAD_1983_Alaska_Albers

Geographic: GCS_North_American_1983

Attributes of: Chum_Sites

Metadata date: 20090722