Understanding ringed seal foraging ecology through Inuit knowledge and stomach content analysis
Ringed seals (Pusa hispida) are opportunistic predators but primarily feed on Arctic cod (Boreogadus saida) and lipid-rich pelagic crustaceans. Recently, shifts in diet have been observed. We used semi-structured interviews and stomach contents analysis to describe ringed seal diet and foraging ecol...
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ftunivmanitoba:oai:mspace.lib.umanitoba.ca:1993/35946 2023-06-18T03:35:39+02:00 Understanding ringed seal foraging ecology through Inuit knowledge and stomach content analysis Ghazal, Maha Ferguson, Steve (Environment and Geography) Wilson, Nicole (Environment and Geography) Furgal, Chris (Trent University) 2021-08-26T18:54:14Z application/pdf http://hdl.handle.net/1993/35946 eng eng http://hdl.handle.net/1993/35946 open access Arctic Ringed seal Inuit Knowledge Stomach content analysis Foraging ecology master thesis 2021 ftunivmanitoba 2023-06-04T17:41:00Z Ringed seals (Pusa hispida) are opportunistic predators but primarily feed on Arctic cod (Boreogadus saida) and lipid-rich pelagic crustaceans. Recently, shifts in diet have been observed. We used semi-structured interviews and stomach contents analysis to describe ringed seal diet and foraging ecology. Interviews (n=23) were conducted with hunters from Arctic Bay, Pangnirtung, and Pond Inlet, Nunavut. Ringed seal stomach samples (n=201) were harvested from Admiralty Inlet, Cumberland Sound, and Eclipse Sound and samples containing prey contents (n=166) were analysed. Hunters observed ugak (cod) and kinguk (amphipods) in the stomachs of ringed seals, year-round, across spatial scales, and within all age classes. The flavour of ringed seal meat was variable across space and time, with some associating the flavour with ringed seal prey. Some participants identified specific areas where ringed seals foraged, for example, the floe edge, polynyas and in areas of current, while most responses pointed to widespread feeding. Ringed seals were described as feeding year-round, except for the moulting and basking period when their stomachs were typically empty or had fewer contents. Some age-related differences in diet were observed by interviewees, specifically that juveniles consumed more kinguk than other prey types when they were first weaned. Stomach contents revealed Arctic cod and Hyperiidae were most abundant and frequently occurring of fishes and invertebrates, respectively. Multivariate tests found a significant effect for region, year of harvest, month of harvest, age class, and the interaction between age class and region. Univariate tests indicated significant differences between regions in the prey counts of Arctic cod and Euphausiacea. Arctic cod had higher abundance and biomass in both northern regions than in Cumberland Sound, whereas Euphausiacea was not present in either of the northern regions. Temporal differences were driven by Euphausiacea among years and Amphipoda among months. Amphipoda differed ... Master Thesis Admiralty Inlet Arctic bay Arctic cod Arctic Boreogadus saida Cumberland Sound Eclipse Sound inuit Nunavut Pangnirtung Pond Inlet Pusa hispida ringed seal MSpace at the University of Manitoba Arctic Nunavut Pond Inlet ENVELOPE(-77.960,-77.960,72.699,72.699) Cumberland Sound ENVELOPE(-66.014,-66.014,65.334,65.334) Pangnirtung ENVELOPE(-65.707,-65.707,66.145,66.145) Arctic Bay ENVELOPE(-85.116,-85.116,73.018,73.018) Eclipse Sound ENVELOPE(-78.998,-78.998,72.635,72.635) Admiralty Inlet ENVELOPE(-86.000,-86.000,72.501,72.501) |
institution |
Open Polar |
collection |
MSpace at the University of Manitoba |
op_collection_id |
ftunivmanitoba |
language |
English |
topic |
Arctic Ringed seal Inuit Knowledge Stomach content analysis Foraging ecology |
spellingShingle |
Arctic Ringed seal Inuit Knowledge Stomach content analysis Foraging ecology Ghazal, Maha Understanding ringed seal foraging ecology through Inuit knowledge and stomach content analysis |
topic_facet |
Arctic Ringed seal Inuit Knowledge Stomach content analysis Foraging ecology |
description |
Ringed seals (Pusa hispida) are opportunistic predators but primarily feed on Arctic cod (Boreogadus saida) and lipid-rich pelagic crustaceans. Recently, shifts in diet have been observed. We used semi-structured interviews and stomach contents analysis to describe ringed seal diet and foraging ecology. Interviews (n=23) were conducted with hunters from Arctic Bay, Pangnirtung, and Pond Inlet, Nunavut. Ringed seal stomach samples (n=201) were harvested from Admiralty Inlet, Cumberland Sound, and Eclipse Sound and samples containing prey contents (n=166) were analysed. Hunters observed ugak (cod) and kinguk (amphipods) in the stomachs of ringed seals, year-round, across spatial scales, and within all age classes. The flavour of ringed seal meat was variable across space and time, with some associating the flavour with ringed seal prey. Some participants identified specific areas where ringed seals foraged, for example, the floe edge, polynyas and in areas of current, while most responses pointed to widespread feeding. Ringed seals were described as feeding year-round, except for the moulting and basking period when their stomachs were typically empty or had fewer contents. Some age-related differences in diet were observed by interviewees, specifically that juveniles consumed more kinguk than other prey types when they were first weaned. Stomach contents revealed Arctic cod and Hyperiidae were most abundant and frequently occurring of fishes and invertebrates, respectively. Multivariate tests found a significant effect for region, year of harvest, month of harvest, age class, and the interaction between age class and region. Univariate tests indicated significant differences between regions in the prey counts of Arctic cod and Euphausiacea. Arctic cod had higher abundance and biomass in both northern regions than in Cumberland Sound, whereas Euphausiacea was not present in either of the northern regions. Temporal differences were driven by Euphausiacea among years and Amphipoda among months. Amphipoda differed ... |
author2 |
Ferguson, Steve (Environment and Geography) Wilson, Nicole (Environment and Geography) Furgal, Chris (Trent University) |
format |
Master Thesis |
author |
Ghazal, Maha |
author_facet |
Ghazal, Maha |
author_sort |
Ghazal, Maha |
title |
Understanding ringed seal foraging ecology through Inuit knowledge and stomach content analysis |
title_short |
Understanding ringed seal foraging ecology through Inuit knowledge and stomach content analysis |
title_full |
Understanding ringed seal foraging ecology through Inuit knowledge and stomach content analysis |
title_fullStr |
Understanding ringed seal foraging ecology through Inuit knowledge and stomach content analysis |
title_full_unstemmed |
Understanding ringed seal foraging ecology through Inuit knowledge and stomach content analysis |
title_sort |
understanding ringed seal foraging ecology through inuit knowledge and stomach content analysis |
publishDate |
2021 |
url |
http://hdl.handle.net/1993/35946 |
long_lat |
ENVELOPE(-77.960,-77.960,72.699,72.699) ENVELOPE(-66.014,-66.014,65.334,65.334) ENVELOPE(-65.707,-65.707,66.145,66.145) ENVELOPE(-85.116,-85.116,73.018,73.018) ENVELOPE(-78.998,-78.998,72.635,72.635) ENVELOPE(-86.000,-86.000,72.501,72.501) |
geographic |
Arctic Nunavut Pond Inlet Cumberland Sound Pangnirtung Arctic Bay Eclipse Sound Admiralty Inlet |
geographic_facet |
Arctic Nunavut Pond Inlet Cumberland Sound Pangnirtung Arctic Bay Eclipse Sound Admiralty Inlet |
genre |
Admiralty Inlet Arctic bay Arctic cod Arctic Boreogadus saida Cumberland Sound Eclipse Sound inuit Nunavut Pangnirtung Pond Inlet Pusa hispida ringed seal |
genre_facet |
Admiralty Inlet Arctic bay Arctic cod Arctic Boreogadus saida Cumberland Sound Eclipse Sound inuit Nunavut Pangnirtung Pond Inlet Pusa hispida ringed seal |
op_relation |
http://hdl.handle.net/1993/35946 |
op_rights |
open access |
_version_ |
1769004563900137472 |