Data from: Time scale matters: genetic analysis does not support adaptation-by-time as the mechanism for adaptive seasonal declines in kokanee reproductive lifespan

Morbey YE, Jensen EL, Russello MA

Date Published: September 9, 2014

DOI: http://dx.doi.org/10.5061/dryad.98c48

 

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Title Time scale matters: genetic analysis does not support adaptation-by-time as the mechanism for adaptive seasonal declines in kokanee reproductive lifespan
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Description Seasonal declines of fitness-related traits are often attributed to environmental effects or individual-level decisions about reproductive timing and effort, but genetic variation may also play a role. In populations of Pacific salmon (Oncorhynchus spp.), seasonal declines in reproductive lifespan have been attributed to adaptation-by-time, in which divergent selection for different traits occurs among reproductively isolated temporal components of a population. We evaluated this hypothesis in kokanee (freshwater obligate Oncorhynchus nerka) by testing for temporal genetic structure in neutral and circadian-linked loci. We detected no genetic differences in at presumably neutral loci among kokanee with different arrival and maturation dates within a spawning season. Similarly, we detected no temporal genetic structure in OtsClock1b, Omy1009uw, or OmyFbxw11, candidate loci associated with circadian function. The genetic evidence from this study and others indicates a lack of support for adaptation-by-time as an important evolutionary mechanism underlying seasonal declines in reproductive lifespan, and a need for greater consideration of other mechanisms such as time-dependent, adaptive adjustment of reproductive effort.
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When using this data, please cite the original publication:

Morbey YE, Jensen EL, Russello MA (2014) Time scale matters: genetic analysis does not support adaptation-by-time as the mechanism for adaptive seasonal declines in kokanee reproductive lifespan. Ecology and Evolution 4(18): 3714-3722. http://dx.doi.org/10.1002/ece3.1214

Additionally, please cite the Dryad data package:

Morbey YE, Jensen EL, Russello MA (2014) Data from: Time scale matters: genetic analysis does not support adaptation-by-time as the mechanism for adaptive seasonal declines in kokanee reproductive lifespan. Dryad Digital Repository. http://dx.doi.org/10.5061/dryad.98c48
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