The summer diet of hooded (Cystophora cristata) and harp (Pagophilus groenlandicus) seals in the West Ice
The harp (Pagophilus groenlandicus) and hooded (Cystophora cristata) seals both inhabit the drift ice areas in the West Ice during certain times of the year, and the present study is part of the Institute of Marine Research’s management studies of these seals. Contents of gastrointestinal tracts fro...
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UiT Norges arktiske universitet
2014
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ftunivtroemsoe:oai:munin.uit.no:10037/6824 2023-05-15T15:59:52+02:00 The summer diet of hooded (Cystophora cristata) and harp (Pagophilus groenlandicus) seals in the West Ice Enoksen, Solveig 2014-08-15 https://hdl.handle.net/10037/6824 eng eng UiT Norges arktiske universitet UiT The Arctic University of Norway https://hdl.handle.net/10037/6824 URN:NBN:no-uit_munin_6424 openAccess Copyright 2014 The Author(s) VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 Diets Hooded seals Harp seals Greenland Sea West Ice BIO-3950 Master thesis Mastergradsoppgave 2014 ftunivtroemsoe 2021-06-25T17:54:03Z The harp (Pagophilus groenlandicus) and hooded (Cystophora cristata) seals both inhabit the drift ice areas in the West Ice during certain times of the year, and the present study is part of the Institute of Marine Research’s management studies of these seals. Contents of gastrointestinal tracts from hooded and harp seals from June-July 2008 and 2010 and harp seal faeces samples were identified to the nearest possible taxon, and the prey importance was estimated both qualitatively and quantitatively. The diet composition of the seals differed much; polar cod dominated the hooded seal diet, whilst amphipods dominated the harp seal diet. The occurrence of polar cod, Themisto sp., krill and Gonatus fabricii in the diets of the two seal species coincides well with the distribution of these prey items, as well as the recorded dive depths of the seals. The inclusion of sculpins and snailfish in the diet of some of the hooded seals was likely because of temporal availability rather than changes in prey preference. Both seal species showed a rather narrow niche breadth. The total prey consumption during summer for the hooded seal population was estimated to 42,000 tonnes, and 300,000 tonnes for the harp seals. Master Thesis Cystophora cristata Greenland Greenland Sea Harp Seal hooded seal Pagophilus groenlandicus polar cod University of Tromsø: Munin Open Research Archive Greenland |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 Diets Hooded seals Harp seals Greenland Sea West Ice BIO-3950 |
spellingShingle |
VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 Diets Hooded seals Harp seals Greenland Sea West Ice BIO-3950 Enoksen, Solveig The summer diet of hooded (Cystophora cristata) and harp (Pagophilus groenlandicus) seals in the West Ice |
topic_facet |
VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 Diets Hooded seals Harp seals Greenland Sea West Ice BIO-3950 |
description |
The harp (Pagophilus groenlandicus) and hooded (Cystophora cristata) seals both inhabit the drift ice areas in the West Ice during certain times of the year, and the present study is part of the Institute of Marine Research’s management studies of these seals. Contents of gastrointestinal tracts from hooded and harp seals from June-July 2008 and 2010 and harp seal faeces samples were identified to the nearest possible taxon, and the prey importance was estimated both qualitatively and quantitatively. The diet composition of the seals differed much; polar cod dominated the hooded seal diet, whilst amphipods dominated the harp seal diet. The occurrence of polar cod, Themisto sp., krill and Gonatus fabricii in the diets of the two seal species coincides well with the distribution of these prey items, as well as the recorded dive depths of the seals. The inclusion of sculpins and snailfish in the diet of some of the hooded seals was likely because of temporal availability rather than changes in prey preference. Both seal species showed a rather narrow niche breadth. The total prey consumption during summer for the hooded seal population was estimated to 42,000 tonnes, and 300,000 tonnes for the harp seals. |
format |
Master Thesis |
author |
Enoksen, Solveig |
author_facet |
Enoksen, Solveig |
author_sort |
Enoksen, Solveig |
title |
The summer diet of hooded (Cystophora cristata) and harp (Pagophilus groenlandicus) seals in the West Ice |
title_short |
The summer diet of hooded (Cystophora cristata) and harp (Pagophilus groenlandicus) seals in the West Ice |
title_full |
The summer diet of hooded (Cystophora cristata) and harp (Pagophilus groenlandicus) seals in the West Ice |
title_fullStr |
The summer diet of hooded (Cystophora cristata) and harp (Pagophilus groenlandicus) seals in the West Ice |
title_full_unstemmed |
The summer diet of hooded (Cystophora cristata) and harp (Pagophilus groenlandicus) seals in the West Ice |
title_sort |
summer diet of hooded (cystophora cristata) and harp (pagophilus groenlandicus) seals in the west ice |
publisher |
UiT Norges arktiske universitet |
publishDate |
2014 |
url |
https://hdl.handle.net/10037/6824 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Cystophora cristata Greenland Greenland Sea Harp Seal hooded seal Pagophilus groenlandicus polar cod |
genre_facet |
Cystophora cristata Greenland Greenland Sea Harp Seal hooded seal Pagophilus groenlandicus polar cod |
op_relation |
https://hdl.handle.net/10037/6824 URN:NBN:no-uit_munin_6424 |
op_rights |
openAccess Copyright 2014 The Author(s) |
_version_ |
1766395773062217728 |