Use and selection of prey by harp seals during summer in the northern Barents Sea
The aim of this study was analyse harp seals prey use and selection during summer in Svalbard waters. A total of 41, 34 and 58 (including 24 faeces samples) from animals were sampled in 1996, 1997 and 2004. Krill was the overall dominant prey species (63%) followed by polar cod (16%) and other fish...
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ftimr:oai:imr.brage.unit.no:11250/100653 2023-05-15T15:38:57+02:00 Use and selection of prey by harp seals during summer in the northern Barents Sea Nilssen, Kjell Tormod Lindstrøm, Ulf 2005 249172 bytes application/pdf http://hdl.handle.net/11250/100653 eng eng ICES ICES CM documents 2005/R:10 http://hdl.handle.net/11250/100653 18 s. harp seal grønlandssel VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 Working paper 2005 ftimr 2021-09-23T20:15:43Z The aim of this study was analyse harp seals prey use and selection during summer in Svalbard waters. A total of 41, 34 and 58 (including 24 faeces samples) from animals were sampled in 1996, 1997 and 2004. Krill was the overall dominant prey species (63%) followed by polar cod (16%) and other fish species (10%) in terms of a combined index (frequency occurrence and weight). Resource mapping was performed in two areas simultaneous with the seal sampling, in 1996 and 1997 by using standard acoustic methods. These surveys suggested that krill was the most abundant prey in both areas and years; krill constituted 84% and 69% of the total prey biomass in 1996 (99.7 tonnes/nm2) and 1997 (21.4 tonnes/nm2), respectively followed by parathmisto sp. (13 and 18%) and Gammarus sp. (2 and 12%). The prey preference results suggest that harp seals are not particular prey selective, i.e., harp seals display a random feeding behaviour. Report Barents Sea Grønlandssel Harp Seal polar cod Svalbard Institute for Marine Research: Brage IMR Barents Sea Svalbard |
institution |
Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
topic |
harp seal grønlandssel VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 |
spellingShingle |
harp seal grønlandssel VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 Nilssen, Kjell Tormod Lindstrøm, Ulf Use and selection of prey by harp seals during summer in the northern Barents Sea |
topic_facet |
harp seal grønlandssel VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 |
description |
The aim of this study was analyse harp seals prey use and selection during summer in Svalbard waters. A total of 41, 34 and 58 (including 24 faeces samples) from animals were sampled in 1996, 1997 and 2004. Krill was the overall dominant prey species (63%) followed by polar cod (16%) and other fish species (10%) in terms of a combined index (frequency occurrence and weight). Resource mapping was performed in two areas simultaneous with the seal sampling, in 1996 and 1997 by using standard acoustic methods. These surveys suggested that krill was the most abundant prey in both areas and years; krill constituted 84% and 69% of the total prey biomass in 1996 (99.7 tonnes/nm2) and 1997 (21.4 tonnes/nm2), respectively followed by parathmisto sp. (13 and 18%) and Gammarus sp. (2 and 12%). The prey preference results suggest that harp seals are not particular prey selective, i.e., harp seals display a random feeding behaviour. |
format |
Report |
author |
Nilssen, Kjell Tormod Lindstrøm, Ulf |
author_facet |
Nilssen, Kjell Tormod Lindstrøm, Ulf |
author_sort |
Nilssen, Kjell Tormod |
title |
Use and selection of prey by harp seals during summer in the northern Barents Sea |
title_short |
Use and selection of prey by harp seals during summer in the northern Barents Sea |
title_full |
Use and selection of prey by harp seals during summer in the northern Barents Sea |
title_fullStr |
Use and selection of prey by harp seals during summer in the northern Barents Sea |
title_full_unstemmed |
Use and selection of prey by harp seals during summer in the northern Barents Sea |
title_sort |
use and selection of prey by harp seals during summer in the northern barents sea |
publisher |
ICES |
publishDate |
2005 |
url |
http://hdl.handle.net/11250/100653 |
geographic |
Barents Sea Svalbard |
geographic_facet |
Barents Sea Svalbard |
genre |
Barents Sea Grønlandssel Harp Seal polar cod Svalbard |
genre_facet |
Barents Sea Grønlandssel Harp Seal polar cod Svalbard |
op_source |
18 s. |
op_relation |
ICES CM documents 2005/R:10 http://hdl.handle.net/11250/100653 |
_version_ |
1766370389382922240 |