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Identification of multiple genetically distinct populations of Chinook salmon (Oncorhynchus tshawytscha) in a small coastal watershed
- Source :
- Environmental Biology of Fishes. 100:923-933
- Publication Year :
- 2017
- Publisher :
- Springer Science and Business Media LLC, 2017.
-
Abstract
- Management and restoration planning for Pacific salmon is often characterized by efforts at broad multi-basin scales. However, finer-scale genetic and phenotypic variability may be present within individual basins and can be overlooked in such efforts, even though it may be a critical component for long-term viability. Here, we investigate Chinook salmon (Oncorhynchus tshawytscha) within the Siletz River, a small coastal watershed in Oregon, USA. Adult Chinook salmon were genotyped using neutral microsatellite markers, single nucleotide polymorphisms and “adaptive” loci, associated with temporal variation in migratory behavior in many salmon populations, to investigate genetic diversity based upon both spatial and temporal variation in migratory and reproductive behavior. Results from all three marker types identified two genetically distinct populations in the basin, corresponding to early returning fish that spawn above a waterfall, a spring-run population, and later returning fish spawning below the waterfall, a fall-run population. This finding is an important consideration for management of the species, as spring-run populations generally only have been recognized in large watersheds, and highlights the need to evaluate population structure of salmon within smaller watersheds, and thereby increase the probability of successful conservation of salmon species.
- Subjects :
- 0106 biological sciences
0301 basic medicine
education.field_of_study
Genetic diversity
Chinook wind
Watershed
Ecology
Population
Population genetics
Aquatic Science
Biology
biology.organism_classification
010603 evolutionary biology
01 natural sciences
Spawn (biology)
Fishery
03 medical and health sciences
030104 developmental biology
Microsatellite
Oncorhynchus
education
Ecology, Evolution, Behavior and Systematics
Subjects
Details
- ISSN :
- 15735133 and 03781909
- Volume :
- 100
- Database :
- OpenAIRE
- Journal :
- Environmental Biology of Fishes
- Accession number :
- edsair.doi...........447666b06e675166b92d5193106940ef