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Creator:: McMillan, John R., Dunham, Jason B., Reeves, Gordon H., Mills, Justin S., and Jordan, Chris E.
Abstract:: Alternative male phenotypes in salmonine fishes arise from individuals that mature as larger and older anadromous marine-migrants or as smaller and younger freshwater residents. To better understand the processes influencing the expression of these phenotypes we examined the influences of growth in length (fork length) and whole body lipid content...
Resource Type:: Article
Full Text:: This study was conducted in the John Day River basin (45º44′N,120º39′W), a large free-flowing trib

Creator:: Sloat, Matthew R., Fraser, Dylan J., Dunham, Jason B., Falke, Jeffrey A., Jordan, Chris E., McMillan, John R., and Ohms, Haley A.
Abstract:: Reproductive tactics and migratory strategies in Pacific and Atlantic salmonines are inextricably linked through the effects of migration (or lack thereof) on age and size at maturity. In this review, we focus on the ecological and evolutionary patterns of freshwater maturation in salmonines, a key process resulting in the diversification...
Resource Type:: Article
Full Text:: , N = no; lower case letters indicate that the occurrence of freshwater maturing forms is uncommon

Creator:: Ohms, Haley A., Sloat, Matthew R., Reeves, Gordon H., Jordan, Chris E., and Dunham, Jason B.
Abstract:: In partially migratory species, such as Oncorhynchus mykiss, the emergence of life history phenotypes is often attributed to fitness trade-offs associated with growth and survival. Fitness trade-offs can be linked to reproductive tactics that vary between the sexes, as well as the influence of environmental conditions. We found that O....
Resource Type:: Article
Full Text:: w w w .n rc re se ar ch pr es s. co m b y O re go n St at e U ni ve rs ity o n

Creator:: Mills, Justin S., Dunham, Jason B., Reeves, Gordon H., McMillan, John R., Zimmerman, Christian E., and Jordan, Chris E.
Abstract:: We described and predicted spatial variation in marine migration (anadromy) of female Oncorhynchus mykiss in the John Day River watershed, Oregon. We collected 149 juvenile O. mykiss across 72 sites and identified locations used by anadromous females by assigning maternal origin (anadromous versus non-anadromous) to each juvenile. These assignments used...
Resource Type:: Article
Full Text:: (45°44’N, 120°39’W) is a free- flowing tributary to the Columbia River draining approximately 20 500

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