Chinook and Coho salmon hybrids linked to habitat and climatic changes on Vancouver Island, British Columbia

Simple item page
dc.contributor.authorAraujo, H. Andres
dc.contributor.authorDuguid, William D.P.
dc.contributor.authorWithler, Ruth
dc.contributor.authorSupernault, Janine
dc.contributor.authorSchulze, Angela D.
dc.contributor.authorMckenzie, Jessica L.
dc.contributor.authorPellett, Kevin
dc.contributor.authorBeacham, Terry D.
dc.contributor.authorJonsen, Kim
dc.contributor.authorGummer, Anna
dc.date.accessioned2022-04-01T16:35:43Z
dc.date.available2022-04-01T16:35:43Z
dc.date.copyright2021en_US
dc.date.issued2021-11
dc.description.abstractBetween 2013 and 2019, 63 presumed Chinook salmon Oncorhynchus tshawytscha sampled primarily in the Strait of Georgia (0.63% of total sample) were identified as potential Chinook–Coho (Oncorhynchus kisutch) hybrids by the presence of anomalous microsatellite genotypes. Their hybrid origin was confirmed by single nucleotide polymorphism amplification of two species-specific amplicons. Mitochondrial DNA indicated that most of these fish resulted from the hybridization of Coho salmon females and Chinook salmon males. Although no diagnostic external features were identified, several individuals displayed an abnormal scale arrangement on the caudal peduncle. One hybrid juvenile examined for meristics exhibited a pyloric caeca count intermediate between published values for Chinook and Coho salmon. Most hybrids originated in the Cowichan River during the 2014 brood year. Their prevalence in the watershed is a naturally occurring event, likely exacerbated by prolonged low water levels which limit habitat and delay Chinook salmon spawning, in addition to the differential abundance of the parental species. This research is the first to document ongoing natural hybridization (Chinook–Coho salmon crosses) and link it to habitat and climatic changes, and includes the identification of eight F1 adults and two juvenile backcross or F2 hybrids. The potential negative impacts of hybridization, particularly in Coho salmon through potential introgression, warrant hybrid identification as an ecosystem monitoring tool within a survey program.en_US
dc.description.reviewstatusRevieweden_US
dc.description.scholarlevelFacultyen_US
dc.identifier.citationAraujo, H. A., Duguid, W. D. P., Withler, R., Supernault, J., Schulze, A. D., Mckenzie, J. L., Pellett, K., Beacham, T. D., Jonsen, K., & Gummer, A. (2021). Chinook and Coho salmon hybrids linked to habitat and climatic changes on Vancouver Island, British Columbia. Ecology and Evolution, 11(23), 16874– 16889. https://doi.org/10.1002/ece3.8322en_US
dc.identifier.urihttps://doi.org/10.1002/ece3.8322
dc.identifier.urihttp://hdl.handle.net/1828/13837
dc.language.isoenen_US
dc.publisherEcology and Evolutionen_US
dc.subjectclimate change
dc.subjectCowichan River
dc.subjecthybridization
dc.subjectintrogression
dc.subjectreproductive viability
dc.subjectsalmonids
dc.subjectStrait of Georgia
dc.subject.departmentDepartment of Biology
dc.titleChinook and Coho salmon hybrids linked to habitat and climatic changes on Vancouver Island, British Columbiaen_US
dc.typeArticleen_US

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Duguid_William_Ecol._Evol._2021.pdf
Size:
1.26 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
2 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Faculty and Staff Publications
 
University of Victoria Libraries

We acknowledge and respect the Lək̓ʷəŋən (Songhees and Esquimalt) Peoples on whose territory the university stands, and the Lək̓ʷəŋən and W̱SÁNEĆ Peoples whose historical relationships with the land continue to this day.