Seasonal movements of arctic grayling in a small stream on the Arctic Coastal Plain, Alaska
Thesis (M.S.) University of Alaska Fairbanks, 2014. In watersheds of the Arctic Coastal Plain (ACP) of Alaska, Arctic Grayling adopt a migratory life history strategy to persist in a landscape with long (~ 8 month), cold winters that cause shallow aquatic habitats to freeze solid. We investigated mo...
Main Author: | |
---|---|
Other Authors: | , , |
Format: | Thesis |
Language: | English |
Published: |
2014
|
Subjects: | |
Online Access: | http://hdl.handle.net/11122/4640 |
id |
ftunivalaska:oai:scholarworks.alaska.edu:11122/4640 |
---|---|
record_format |
openpolar |
spelling |
ftunivalaska:oai:scholarworks.alaska.edu:11122/4640 2023-05-15T14:31:20+02:00 Seasonal movements of arctic grayling in a small stream on the Arctic Coastal Plain, Alaska Heim, Kurt C. Wipfli, Mark Seitz, Andrew Falke, Jeffrey 2014-08 http://hdl.handle.net/11122/4640 en_US eng http://hdl.handle.net/11122/4640 Fisheries Division Thesis ms 2014 ftunivalaska 2023-02-23T21:36:16Z Thesis (M.S.) University of Alaska Fairbanks, 2014. In watersheds of the Arctic Coastal Plain (ACP) of Alaska, Arctic Grayling adopt a migratory life history strategy to persist in a landscape with long (~ 8 month), cold winters that cause shallow aquatic habitats to freeze solid. We investigated movement patterns of adult and juvenile Arctic Grayling in a shallow beaded stream (Crea Creek), a dominant headwater stream type on the ACP. From 2012–2013 Arctic Grayling (N = 1035) were tagged with passive integrated transponder tags and monitored using an array of stream-wide antennae. Migration into Crea Creek peaked immediately after ice break-up in the main channel of the study area. Fish caught within the stream in June were in relatively poor body condition compared to fish captured later in summer. In both years, fish entering the stream during high flow and colder temperatures swam farther upstream than those entering during low flow and warmer temperatures. Migration of adult fish out of the stream was most strongly correlated with decreasing stream discharge, whereas juvenile downstream migration occurred in two peaks and was negatively correlated to minimum stream temperature and discharge. Among juveniles, fish of larger size and higher body condition tended to emigrate earlier. These results indicate that the population level migratory response is strongly tied to seasonal changes in hydrology, though heterogeneity among individuals also influences the response to seasonal change. This work demonstrates the importance of environmental cues, and surface-water flow mediated connectivity during the open-water period, and provides information needed to identify susceptibilities of migratory fishes to climate change and petroleum development on the ACP. Chapter 1: Environmental correlates of Arctic Grayling seasonal movement on The Arctic Coastal plain, Alaska -- Chapter 2: Body size and condition influence migration timing of Arctic Grayling -- Conclusions -- Literature Cited -- Appendices. Thesis Arctic grayling Arctic Climate change Alaska University of Alaska: ScholarWorks@UA Arctic Fairbanks |
institution |
Open Polar |
collection |
University of Alaska: ScholarWorks@UA |
op_collection_id |
ftunivalaska |
language |
English |
description |
Thesis (M.S.) University of Alaska Fairbanks, 2014. In watersheds of the Arctic Coastal Plain (ACP) of Alaska, Arctic Grayling adopt a migratory life history strategy to persist in a landscape with long (~ 8 month), cold winters that cause shallow aquatic habitats to freeze solid. We investigated movement patterns of adult and juvenile Arctic Grayling in a shallow beaded stream (Crea Creek), a dominant headwater stream type on the ACP. From 2012–2013 Arctic Grayling (N = 1035) were tagged with passive integrated transponder tags and monitored using an array of stream-wide antennae. Migration into Crea Creek peaked immediately after ice break-up in the main channel of the study area. Fish caught within the stream in June were in relatively poor body condition compared to fish captured later in summer. In both years, fish entering the stream during high flow and colder temperatures swam farther upstream than those entering during low flow and warmer temperatures. Migration of adult fish out of the stream was most strongly correlated with decreasing stream discharge, whereas juvenile downstream migration occurred in two peaks and was negatively correlated to minimum stream temperature and discharge. Among juveniles, fish of larger size and higher body condition tended to emigrate earlier. These results indicate that the population level migratory response is strongly tied to seasonal changes in hydrology, though heterogeneity among individuals also influences the response to seasonal change. This work demonstrates the importance of environmental cues, and surface-water flow mediated connectivity during the open-water period, and provides information needed to identify susceptibilities of migratory fishes to climate change and petroleum development on the ACP. Chapter 1: Environmental correlates of Arctic Grayling seasonal movement on The Arctic Coastal plain, Alaska -- Chapter 2: Body size and condition influence migration timing of Arctic Grayling -- Conclusions -- Literature Cited -- Appendices. |
author2 |
Wipfli, Mark Seitz, Andrew Falke, Jeffrey |
format |
Thesis |
author |
Heim, Kurt C. |
spellingShingle |
Heim, Kurt C. Seasonal movements of arctic grayling in a small stream on the Arctic Coastal Plain, Alaska |
author_facet |
Heim, Kurt C. |
author_sort |
Heim, Kurt C. |
title |
Seasonal movements of arctic grayling in a small stream on the Arctic Coastal Plain, Alaska |
title_short |
Seasonal movements of arctic grayling in a small stream on the Arctic Coastal Plain, Alaska |
title_full |
Seasonal movements of arctic grayling in a small stream on the Arctic Coastal Plain, Alaska |
title_fullStr |
Seasonal movements of arctic grayling in a small stream on the Arctic Coastal Plain, Alaska |
title_full_unstemmed |
Seasonal movements of arctic grayling in a small stream on the Arctic Coastal Plain, Alaska |
title_sort |
seasonal movements of arctic grayling in a small stream on the arctic coastal plain, alaska |
publishDate |
2014 |
url |
http://hdl.handle.net/11122/4640 |
geographic |
Arctic Fairbanks |
geographic_facet |
Arctic Fairbanks |
genre |
Arctic grayling Arctic Climate change Alaska |
genre_facet |
Arctic grayling Arctic Climate change Alaska |
op_relation |
http://hdl.handle.net/11122/4640 Fisheries Division |
_version_ |
1766304987387789312 |