Trophic ecology of Arctic char (Salvelinus alpinus L.) in the Cumberland Sound region of the Canadian Arctic
Trophic ecology is a key component in describing patterns of variation between and within populations, particularly in Arctic marine systems wherein climate change is impacting food webs. This thesis investigates the trophic ecology of Arctic char (Salvelinus alpinus) in the Cumberland Sound region...
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Language: | English |
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Online Access: | http://hdl.handle.net/1993/21693 |
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ftunivmanitoba:oai:mspace.lib.umanitoba.ca:1993/21693 2023-06-18T03:38:44+02:00 Trophic ecology of Arctic char (Salvelinus alpinus L.) in the Cumberland Sound region of the Canadian Arctic Ulrich, Kendra L. Tallman, Ross F. (Biological Sciences) Davoren, Gail (Biological Sciences) Docker, Margaret (Biological Sciences) Fisk, Aaron (Biological Sciences) Hanson, Mark (Environment and Geography) 2013-07-03 application/pdf http://hdl.handle.net/1993/21693 eng eng http://hdl.handle.net/1993/21693 open access Arctic char ecotype trophic ecology capelin stable isotopes fatty acids master thesis 2013 ftunivmanitoba 2023-06-04T17:42:26Z Trophic ecology is a key component in describing patterns of variation between and within populations, particularly in Arctic marine systems wherein climate change is impacting food webs. This thesis investigates the trophic ecology of Arctic char (Salvelinus alpinus) in the Cumberland Sound region using a multi-indicator approach. My data show trophic niche differences between resident and anadromous ecotypes and evidence for estuarine feeding by residents. I document a shift in the marine diet of Arctic char from zooplankton to capelin (Mallotus villosus) – a novel prey species in this region – that has occurred in less than a decade. Changes in Arctic char growth imply population-level effects of this shift; however, more research is required. Finally, I find lipid effects on δ13C and lipid-extraction effects on δ15N and δ34S for Arctic char muscle tissue. Lipid-correction models did not provide adequate δ13C estimates; thus, chemical extraction or ecotype-specific validation of models is recommended. October 2013 Master Thesis Arctic Climate change Cumberland Sound Salvelinus alpinus Zooplankton MSpace at the University of Manitoba Arctic Cumberland Sound ENVELOPE(-66.014,-66.014,65.334,65.334) |
institution |
Open Polar |
collection |
MSpace at the University of Manitoba |
op_collection_id |
ftunivmanitoba |
language |
English |
topic |
Arctic char ecotype trophic ecology capelin stable isotopes fatty acids |
spellingShingle |
Arctic char ecotype trophic ecology capelin stable isotopes fatty acids Ulrich, Kendra L. Trophic ecology of Arctic char (Salvelinus alpinus L.) in the Cumberland Sound region of the Canadian Arctic |
topic_facet |
Arctic char ecotype trophic ecology capelin stable isotopes fatty acids |
description |
Trophic ecology is a key component in describing patterns of variation between and within populations, particularly in Arctic marine systems wherein climate change is impacting food webs. This thesis investigates the trophic ecology of Arctic char (Salvelinus alpinus) in the Cumberland Sound region using a multi-indicator approach. My data show trophic niche differences between resident and anadromous ecotypes and evidence for estuarine feeding by residents. I document a shift in the marine diet of Arctic char from zooplankton to capelin (Mallotus villosus) – a novel prey species in this region – that has occurred in less than a decade. Changes in Arctic char growth imply population-level effects of this shift; however, more research is required. Finally, I find lipid effects on δ13C and lipid-extraction effects on δ15N and δ34S for Arctic char muscle tissue. Lipid-correction models did not provide adequate δ13C estimates; thus, chemical extraction or ecotype-specific validation of models is recommended. October 2013 |
author2 |
Tallman, Ross F. (Biological Sciences) Davoren, Gail (Biological Sciences) Docker, Margaret (Biological Sciences) Fisk, Aaron (Biological Sciences) Hanson, Mark (Environment and Geography) |
format |
Master Thesis |
author |
Ulrich, Kendra L. |
author_facet |
Ulrich, Kendra L. |
author_sort |
Ulrich, Kendra L. |
title |
Trophic ecology of Arctic char (Salvelinus alpinus L.) in the Cumberland Sound region of the Canadian Arctic |
title_short |
Trophic ecology of Arctic char (Salvelinus alpinus L.) in the Cumberland Sound region of the Canadian Arctic |
title_full |
Trophic ecology of Arctic char (Salvelinus alpinus L.) in the Cumberland Sound region of the Canadian Arctic |
title_fullStr |
Trophic ecology of Arctic char (Salvelinus alpinus L.) in the Cumberland Sound region of the Canadian Arctic |
title_full_unstemmed |
Trophic ecology of Arctic char (Salvelinus alpinus L.) in the Cumberland Sound region of the Canadian Arctic |
title_sort |
trophic ecology of arctic char (salvelinus alpinus l.) in the cumberland sound region of the canadian arctic |
publishDate |
2013 |
url |
http://hdl.handle.net/1993/21693 |
long_lat |
ENVELOPE(-66.014,-66.014,65.334,65.334) |
geographic |
Arctic Cumberland Sound |
geographic_facet |
Arctic Cumberland Sound |
genre |
Arctic Climate change Cumberland Sound Salvelinus alpinus Zooplankton |
genre_facet |
Arctic Climate change Cumberland Sound Salvelinus alpinus Zooplankton |
op_relation |
http://hdl.handle.net/1993/21693 |
op_rights |
open access |
_version_ |
1769003604718387200 |