First-generation effects on development time of outcrossing between geographically isolated and seasonally isolated populations of pink salmon (Oncorhynchus gorbuscha)

Thesis (M.S.) University of Alaska Fairbanks, 2010 Bootstrap analyses of hatch data collected during two independent experiments revealed that hybridization between pink salmon (Oncorhynchus gorbuscha) breeding populations separated at either a large geographic scale or a fine temporal scale can inf...

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Bibliographic Details
Main Author: Echave, Jesse D.
Other Authors: Gharrett, Anthony, Smoker, William, Adkison, Milo
Format: Thesis
Language:English
Published: 2010
Subjects:
Online Access:http://hdl.handle.net/11122/8206
id ftunivalaska:oai:scholarworks.alaska.edu:11122/8206
record_format openpolar
spelling ftunivalaska:oai:scholarworks.alaska.edu:11122/8206 2023-05-15T17:04:39+02:00 First-generation effects on development time of outcrossing between geographically isolated and seasonally isolated populations of pink salmon (Oncorhynchus gorbuscha) Echave, Jesse D. Gharrett, Anthony Smoker, William Adkison, Milo 2010-12 http://hdl.handle.net/11122/8206 en_US eng http://hdl.handle.net/11122/8206 Fisheries Division Pink salmon Breeding Alaska Thesis ms 2010 ftunivalaska 2023-02-23T21:37:00Z Thesis (M.S.) University of Alaska Fairbanks, 2010 Bootstrap analyses of hatch data collected during two independent experiments revealed that hybridization between pink salmon (Oncorhynchus gorbuscha) breeding populations separated at either a large geographic scale or a fine temporal scale can influence development time. Restricted maximum likelihood estimators also revealed that sire, dam, cross, and parental interaction can influence genetic variance associated with development time at either scale. Few studies have investigated the extent of local adaptation that results from fine-scale ecological variation, the genetic underpinnings of that adaptation, or the potential impacts outbreeding at that level may have on fitness. We tested whether or not local adaptation contributed to genetic divergence among subpopulations of pink salmon that overlap temporally within the same spawning habitat (early-run fish and late-run fish within Auke Creek, near Juneau, Alaska) by determining whether or not outbreeding influenced development time (a fitness-related trait) in first-generation hybrids. We examined genetic divergence among populations isolated at a much broader scale (Pillar Creek on Kodiak Island, Alaska, and Auke Creek, 1,000 km great circle distance) as a more extreme reference to local adaptation. Results provide evidence that development time is locally adapted and expressed primarily in a locus-by-locus manner. Thesis Kodiak Oncorhynchus gorbuscha Pink salmon Alaska University of Alaska: ScholarWorks@UA Fairbanks Pillar ENVELOPE(166.217,166.217,-77.583,-77.583)
institution Open Polar
collection University of Alaska: ScholarWorks@UA
op_collection_id ftunivalaska
language English
topic Pink salmon
Breeding
Alaska
spellingShingle Pink salmon
Breeding
Alaska
Echave, Jesse D.
First-generation effects on development time of outcrossing between geographically isolated and seasonally isolated populations of pink salmon (Oncorhynchus gorbuscha)
topic_facet Pink salmon
Breeding
Alaska
description Thesis (M.S.) University of Alaska Fairbanks, 2010 Bootstrap analyses of hatch data collected during two independent experiments revealed that hybridization between pink salmon (Oncorhynchus gorbuscha) breeding populations separated at either a large geographic scale or a fine temporal scale can influence development time. Restricted maximum likelihood estimators also revealed that sire, dam, cross, and parental interaction can influence genetic variance associated with development time at either scale. Few studies have investigated the extent of local adaptation that results from fine-scale ecological variation, the genetic underpinnings of that adaptation, or the potential impacts outbreeding at that level may have on fitness. We tested whether or not local adaptation contributed to genetic divergence among subpopulations of pink salmon that overlap temporally within the same spawning habitat (early-run fish and late-run fish within Auke Creek, near Juneau, Alaska) by determining whether or not outbreeding influenced development time (a fitness-related trait) in first-generation hybrids. We examined genetic divergence among populations isolated at a much broader scale (Pillar Creek on Kodiak Island, Alaska, and Auke Creek, 1,000 km great circle distance) as a more extreme reference to local adaptation. Results provide evidence that development time is locally adapted and expressed primarily in a locus-by-locus manner.
author2 Gharrett, Anthony
Smoker, William
Adkison, Milo
format Thesis
author Echave, Jesse D.
author_facet Echave, Jesse D.
author_sort Echave, Jesse D.
title First-generation effects on development time of outcrossing between geographically isolated and seasonally isolated populations of pink salmon (Oncorhynchus gorbuscha)
title_short First-generation effects on development time of outcrossing between geographically isolated and seasonally isolated populations of pink salmon (Oncorhynchus gorbuscha)
title_full First-generation effects on development time of outcrossing between geographically isolated and seasonally isolated populations of pink salmon (Oncorhynchus gorbuscha)
title_fullStr First-generation effects on development time of outcrossing between geographically isolated and seasonally isolated populations of pink salmon (Oncorhynchus gorbuscha)
title_full_unstemmed First-generation effects on development time of outcrossing between geographically isolated and seasonally isolated populations of pink salmon (Oncorhynchus gorbuscha)
title_sort first-generation effects on development time of outcrossing between geographically isolated and seasonally isolated populations of pink salmon (oncorhynchus gorbuscha)
publishDate 2010
url http://hdl.handle.net/11122/8206
long_lat ENVELOPE(166.217,166.217,-77.583,-77.583)
geographic Fairbanks
Pillar
geographic_facet Fairbanks
Pillar
genre Kodiak
Oncorhynchus gorbuscha
Pink salmon
Alaska
genre_facet Kodiak
Oncorhynchus gorbuscha
Pink salmon
Alaska
op_relation http://hdl.handle.net/11122/8206
Fisheries Division
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