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Population structure and relatedness among female Northern Pintails in three California wintering regions

Waterbirds

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Abstract

Female Northern Pintails (Anas acuta) were sampled in California's three main Central Valley wintering regions (Sacramento Valley, Suisun Marsh, San Joaquin Valley) during September–October before most regional movements occur and microsatellite and mitochondrial DNA were analyzed to examine population structure and relatedness. Despite reportedly high rates of early-fall pairing and regional fidelity, both sets of markers indicated that there was little overall genetic structuring by region. Pintails from Suisun Marsh did exhibit higher relatedness among individuals and capture groups than in the Sacramento or San Joaquin Valleys, likely reflecting a sample comprised of a greater proportion of local breeders. The lack of genetic structuring among regions indicates that a high degree of movement and interchange occurs among pintails wintering in the Central Valley. Thus, although maintaining the existing distribution of pintails among Central Valley regions is important for other reasons, it does not appear to be critical to retain current patterns of population genetic variation. Because of potential lack of independence among highly related study individuals, researchers should consider regional differences in relatedness when designing sampling schemes and interpreting research findings.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Population structure and relatedness among female Northern Pintails in three California wintering regions
Series title:
Waterbirds
Volume
33
Issue:
1
Year Published:
2010
Language:
English
Publisher:
The Waterbird Society
Publisher location:
Waco, TX
Contributing office(s):
Western Ecological Research Center
Description:
9 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Waterbirds
First page:
1
Last page:
9
Number of Pages:
9
Country:
United States
State:
California
Other Geospatial:
Sacramento Valley;Suisun Marsh;San Joaquin Valley