Ecological factors influencing fish distribution in a large subarctic lake system
Thesis (M.S.) University of Alaska Fairbanks, 2006 The coastal climate and frequent wind storms in southwest Alaska create an atypical thermal environment (non-stratified in summer) in the remote Ugashik lakes. This study documents the distribution of lake trout 'Salvelinus namaycush, ' ar...
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ftunivalaska:oai:scholarworks.alaska.edu:11122/5889 2023-05-15T14:31:23+02:00 Ecological factors influencing fish distribution in a large subarctic lake system Plumb, Miranda Paige 2006-05 http://hdl.handle.net/11122/5889 en_US eng http://hdl.handle.net/11122/5889 Fisheries Division Thesis ms 2006 ftunivalaska 2023-02-23T21:36:31Z Thesis (M.S.) University of Alaska Fairbanks, 2006 The coastal climate and frequent wind storms in southwest Alaska create an atypical thermal environment (non-stratified in summer) in the remote Ugashik lakes. This study documents the distribution of lake trout 'Salvelinus namaycush, ' arctic char 'S. alpinus', Dolly Varden 'S. malma, ' arctic grayling 'Thymallus arcticus, ' round whitefish 'Prosopium cylindraceum, ' and pygmy whitefish 'P. coulterii' relative to depth, substrate particle size, food habits, length, and age in the absence of strong thermal structure. Sample sites were randomly chosen within sampling strata and gill nets were set at each site. Lake trout and round whitefish were most abundant and had the oldest individuals in the catch. In more typical thermally stratified lake systems lake trout and Arctic char usually move to colder, deeper water in summer. In the Ugashik lakes, however, both species were abundant in shallow water all summer. Prior to this study pygmy whitefish were undocumented in this system. The fish examined in the Ugashik lakes were opportunistic feeders, consuming organisms such as isopods and amphipods. Fish in the Ugashik lakes were found in locations different from what one would expect from predominant literature. Fisheries managers may need to take this into account in their fisheries management. Thesis Arctic grayling Arctic Pygmy whitefish Subarctic Thymallus arcticus Alaska University of Alaska: ScholarWorks@UA Arctic Fairbanks Varden ENVELOPE(7.656,7.656,62.534,62.534) |
institution |
Open Polar |
collection |
University of Alaska: ScholarWorks@UA |
op_collection_id |
ftunivalaska |
language |
English |
description |
Thesis (M.S.) University of Alaska Fairbanks, 2006 The coastal climate and frequent wind storms in southwest Alaska create an atypical thermal environment (non-stratified in summer) in the remote Ugashik lakes. This study documents the distribution of lake trout 'Salvelinus namaycush, ' arctic char 'S. alpinus', Dolly Varden 'S. malma, ' arctic grayling 'Thymallus arcticus, ' round whitefish 'Prosopium cylindraceum, ' and pygmy whitefish 'P. coulterii' relative to depth, substrate particle size, food habits, length, and age in the absence of strong thermal structure. Sample sites were randomly chosen within sampling strata and gill nets were set at each site. Lake trout and round whitefish were most abundant and had the oldest individuals in the catch. In more typical thermally stratified lake systems lake trout and Arctic char usually move to colder, deeper water in summer. In the Ugashik lakes, however, both species were abundant in shallow water all summer. Prior to this study pygmy whitefish were undocumented in this system. The fish examined in the Ugashik lakes were opportunistic feeders, consuming organisms such as isopods and amphipods. Fish in the Ugashik lakes were found in locations different from what one would expect from predominant literature. Fisheries managers may need to take this into account in their fisheries management. |
format |
Thesis |
author |
Plumb, Miranda Paige |
spellingShingle |
Plumb, Miranda Paige Ecological factors influencing fish distribution in a large subarctic lake system |
author_facet |
Plumb, Miranda Paige |
author_sort |
Plumb, Miranda Paige |
title |
Ecological factors influencing fish distribution in a large subarctic lake system |
title_short |
Ecological factors influencing fish distribution in a large subarctic lake system |
title_full |
Ecological factors influencing fish distribution in a large subarctic lake system |
title_fullStr |
Ecological factors influencing fish distribution in a large subarctic lake system |
title_full_unstemmed |
Ecological factors influencing fish distribution in a large subarctic lake system |
title_sort |
ecological factors influencing fish distribution in a large subarctic lake system |
publishDate |
2006 |
url |
http://hdl.handle.net/11122/5889 |
long_lat |
ENVELOPE(7.656,7.656,62.534,62.534) |
geographic |
Arctic Fairbanks Varden |
geographic_facet |
Arctic Fairbanks Varden |
genre |
Arctic grayling Arctic Pygmy whitefish Subarctic Thymallus arcticus Alaska |
genre_facet |
Arctic grayling Arctic Pygmy whitefish Subarctic Thymallus arcticus Alaska |
op_relation |
http://hdl.handle.net/11122/5889 Fisheries Division |
_version_ |
1766305040535912448 |