2013
DOI: 10.1007/s00442-012-2564-9
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Spatial structuring of an evolving life-history strategy under altered environmental conditions

Abstract: Human disturbances to ecosystems have created challenges to populations worldwide, forcing them to respond phenotypically in ways that increase their fitness under current conditions. One approach to examining population responses to disturbance in species with complex life histories is to study species that exhibit spatial patterns in their phenotypic response across populations or demes. In this study, we investigate a threatened population of fall chinook salmon (Oncorhynchus tshawytscha) in the Snake River… Show more

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Cited by 37 publications
(74 citation statements)
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“…These formations consist of carbonate (limestone and dolomite) and evaporite (gypsum and halite). Thus, older bedrock in the northern portion of the river is reflected by higher 87 Sr: 86 Sr values, while younger bedrock in the southern portion of the river is reflected by lower 87 Sr: 86 Sr values (Barnett-Johnson et al 2008;Hegg et al 2013).…”
Section: Bedrock and Pecos River Water Chemistrymentioning
confidence: 96%
“…These formations consist of carbonate (limestone and dolomite) and evaporite (gypsum and halite). Thus, older bedrock in the northern portion of the river is reflected by higher 87 Sr: 86 Sr values, while younger bedrock in the southern portion of the river is reflected by lower 87 Sr: 86 Sr values (Barnett-Johnson et al 2008;Hegg et al 2013).…”
Section: Bedrock and Pecos River Water Chemistrymentioning
confidence: 96%
“…Elemental concentrations of Ca, Sr, Ba, Mg and Mn were analysed with an inductively‐coupled plasma mass spectrometer (ICP‐MS – Finnigan‐Thermo Element II) using analytical methods and instrument conditions described in Hegg et al . ().…”
Section: Methodsmentioning
confidence: 97%
“…Oncorhynchus tshawytscha exhibit a diverse array of movements, both in terms of dispersal behaviours and migration, which collectively contribute to variability in juvenile freshwater habitat use within populations (Quinn, ; Hamann & Kennedy, ; Hegg et al ., ). Anthropogenic alterations (particularly dams and associated reservoirs) affect habitat use among individuals (Williams et al ., ), and life‐history plasticity is hypothesized to provide resilience to anthropogenic as well as natural perturbations (Waples et al ., ).…”
Section: Introductionmentioning
confidence: 99%
“…Volk et al (2010), on the other hand, conducted a mark-recapture study to investigate the periodicity of otolith increment formation. For our study, confirmation of an emergence check and of daily increment formation grew out of our need to better understand early life history development (Zabel and Achord 2004), growth (Achord et al 2007, Zabel et al 2010, and habitat use (Hegg et al 2013) so as to predict survival to adulthood Williams 2002, Miller et al 2010). Further, we sought to contribute to literature regarding increment validation of Chinook salmon by focusing on the Yakima River population in Washington State, compared to work of Volk et al (2010), which used fish from Salmon River in Oregon, and Neilson and Geen (1982) and Gauldie (1991), which used Chinook salmon from Vancouver, British Columbia, Canada.…”
Section: Introductionmentioning
confidence: 95%