The ecology of the Arctic char and the dolly varden in the Becharof Lake drainage, Alaska
Thesis (M.S.) University of Alaska Fairbanks, 2000 Becharof Lake is home to both Arctic char (Salvelinus alpinus) and the closely related Dolly Varden (Salvelinus malma), two species known not only to be similar in appearance but also to exhibit similar life histories. The body morphometry, otolith...
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2000
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ftunivalaska:oai:scholarworks.alaska.edu:11122/6923 2023-05-15T14:49:41+02:00 The ecology of the Arctic char and the dolly varden in the Becharof Lake drainage, Alaska Scanlon, Brendan P. 2000-12 http://hdl.handle.net/11122/6923 en_US eng http://hdl.handle.net/11122/6923 Fisheries Division Thesis ms 2000 ftunivalaska 2023-02-23T21:36:44Z Thesis (M.S.) University of Alaska Fairbanks, 2000 Becharof Lake is home to both Arctic char (Salvelinus alpinus) and the closely related Dolly Varden (Salvelinus malma), two species known not only to be similar in appearance but also to exhibit similar life histories. The body morphometry, otolith microchemistry, and stomach contents of both species were studied in fish collected from May to September 1998. Morphometric and meristic analysis revealed clear separation in body structure between the two species, as well as potential sub-populations within each species. Otolith microchemistry revealed incidences of anadromy and non-anadromy in both species. Stomach content analysis revealed a broad feeding niche but smaller ranges in food types in individual Arctic char with little seasonal preference, whereas Dolly Varden showed seasonality in food choices. Data suggest that both species can move in and out of the lake system, and that little competition for food or habitat occurs between the two species in the summer months. Thesis Arctic Salvelinus alpinus 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, 2000 Becharof Lake is home to both Arctic char (Salvelinus alpinus) and the closely related Dolly Varden (Salvelinus malma), two species known not only to be similar in appearance but also to exhibit similar life histories. The body morphometry, otolith microchemistry, and stomach contents of both species were studied in fish collected from May to September 1998. Morphometric and meristic analysis revealed clear separation in body structure between the two species, as well as potential sub-populations within each species. Otolith microchemistry revealed incidences of anadromy and non-anadromy in both species. Stomach content analysis revealed a broad feeding niche but smaller ranges in food types in individual Arctic char with little seasonal preference, whereas Dolly Varden showed seasonality in food choices. Data suggest that both species can move in and out of the lake system, and that little competition for food or habitat occurs between the two species in the summer months. |
format |
Thesis |
author |
Scanlon, Brendan P. |
spellingShingle |
Scanlon, Brendan P. The ecology of the Arctic char and the dolly varden in the Becharof Lake drainage, Alaska |
author_facet |
Scanlon, Brendan P. |
author_sort |
Scanlon, Brendan P. |
title |
The ecology of the Arctic char and the dolly varden in the Becharof Lake drainage, Alaska |
title_short |
The ecology of the Arctic char and the dolly varden in the Becharof Lake drainage, Alaska |
title_full |
The ecology of the Arctic char and the dolly varden in the Becharof Lake drainage, Alaska |
title_fullStr |
The ecology of the Arctic char and the dolly varden in the Becharof Lake drainage, Alaska |
title_full_unstemmed |
The ecology of the Arctic char and the dolly varden in the Becharof Lake drainage, Alaska |
title_sort |
ecology of the arctic char and the dolly varden in the becharof lake drainage, alaska |
publishDate |
2000 |
url |
http://hdl.handle.net/11122/6923 |
long_lat |
ENVELOPE(7.656,7.656,62.534,62.534) |
geographic |
Arctic Fairbanks Varden |
geographic_facet |
Arctic Fairbanks Varden |
genre |
Arctic Salvelinus alpinus Alaska |
genre_facet |
Arctic Salvelinus alpinus Alaska |
op_relation |
http://hdl.handle.net/11122/6923 Fisheries Division |
_version_ |
1766320757350072320 |