Diet and prey consumption of grey seals ( Halichoerus grypus ) in Norway
To obtain knowledge of feeding habits and prey consumption of grey seals, data were sampled in selected areas along the Norwegian coast. Prey were recovered from 182 grey seal gastrointestinal tracts and 199 faecal samples, collected during1999–2010 in Finnmark, Nordland and Rogaland counties. The m...
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2019
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ftdatacite:10.6084/m9.figshare.8064014 2023-05-15T16:13:37+02:00 Diet and prey consumption of grey seals ( Halichoerus grypus ) in Norway Nilssen, Kjell Tormod Lindstrøm, Ulf Westgaard, Jon Ivar Lindblom, Lotta Taija-Riitta Blencke Haug, Tore 2019 https://dx.doi.org/10.6084/m9.figshare.8064014 https://tandf.figshare.com/articles/Diet_and_prey_consumption_of_grey_seals_i_Halichoerus_grypus_i_in_Norway/8064014 unknown Taylor & Francis https://dx.doi.org/10.1080/17451000.2019.1605182 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology FOS Biological sciences 69999 Biological Sciences not elsewhere classified Inorganic Chemistry FOS Chemical sciences dataset Dataset 2019 ftdatacite https://doi.org/10.6084/m9.figshare.8064014 https://doi.org/10.1080/17451000.2019.1605182 2021-11-05T12:55:41Z To obtain knowledge of feeding habits and prey consumption of grey seals, data were sampled in selected areas along the Norwegian coast. Prey were recovered from 182 grey seal gastrointestinal tracts and 199 faecal samples, collected during1999–2010 in Finnmark, Nordland and Rogaland counties. The most important prey were saithe Pollachius virens , cod Gadus morhua and wolffish Anarchichus spp. Wolffish was mainly eaten by seals ≥ five years old. Otherwise, the data did not suggest important temporal or spatial variations between the main prey items in the grey seal diet. However, capelin Mallotus villosus was eaten during spring in Finnmark suggesting that seasonally abundant pelagic fish species could be regionally important. Total annual grey seal consumption of various species was estimated using bio-energetic modelling. The input variables were seal numbers, energy demands, diet composition in terms of biomass and energy densities of prey species. Assuming the observed grey seals diet composition in the sampling areas were representative for the diet along the Norwegian coast, the mean total annual consumption by 3850 grey seals was estimated to be 8084 tons in Norwegian waters; saithe (3059 tons), cod (2598 tons) and wolffish (1364 tons) were consumed in highest quantities. Dataset Finnmark Gadus morhua Nordland Nordland Finnmark Nordland DataCite Metadata Store (German National Library of Science and Technology) Norway |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology FOS Biological sciences 69999 Biological Sciences not elsewhere classified Inorganic Chemistry FOS Chemical sciences |
spellingShingle |
59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology FOS Biological sciences 69999 Biological Sciences not elsewhere classified Inorganic Chemistry FOS Chemical sciences Nilssen, Kjell Tormod Lindstrøm, Ulf Westgaard, Jon Ivar Lindblom, Lotta Taija-Riitta Blencke Haug, Tore Diet and prey consumption of grey seals ( Halichoerus grypus ) in Norway |
topic_facet |
59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology FOS Biological sciences 69999 Biological Sciences not elsewhere classified Inorganic Chemistry FOS Chemical sciences |
description |
To obtain knowledge of feeding habits and prey consumption of grey seals, data were sampled in selected areas along the Norwegian coast. Prey were recovered from 182 grey seal gastrointestinal tracts and 199 faecal samples, collected during1999–2010 in Finnmark, Nordland and Rogaland counties. The most important prey were saithe Pollachius virens , cod Gadus morhua and wolffish Anarchichus spp. Wolffish was mainly eaten by seals ≥ five years old. Otherwise, the data did not suggest important temporal or spatial variations between the main prey items in the grey seal diet. However, capelin Mallotus villosus was eaten during spring in Finnmark suggesting that seasonally abundant pelagic fish species could be regionally important. Total annual grey seal consumption of various species was estimated using bio-energetic modelling. The input variables were seal numbers, energy demands, diet composition in terms of biomass and energy densities of prey species. Assuming the observed grey seals diet composition in the sampling areas were representative for the diet along the Norwegian coast, the mean total annual consumption by 3850 grey seals was estimated to be 8084 tons in Norwegian waters; saithe (3059 tons), cod (2598 tons) and wolffish (1364 tons) were consumed in highest quantities. |
format |
Dataset |
author |
Nilssen, Kjell Tormod Lindstrøm, Ulf Westgaard, Jon Ivar Lindblom, Lotta Taija-Riitta Blencke Haug, Tore |
author_facet |
Nilssen, Kjell Tormod Lindstrøm, Ulf Westgaard, Jon Ivar Lindblom, Lotta Taija-Riitta Blencke Haug, Tore |
author_sort |
Nilssen, Kjell Tormod |
title |
Diet and prey consumption of grey seals ( Halichoerus grypus ) in Norway |
title_short |
Diet and prey consumption of grey seals ( Halichoerus grypus ) in Norway |
title_full |
Diet and prey consumption of grey seals ( Halichoerus grypus ) in Norway |
title_fullStr |
Diet and prey consumption of grey seals ( Halichoerus grypus ) in Norway |
title_full_unstemmed |
Diet and prey consumption of grey seals ( Halichoerus grypus ) in Norway |
title_sort |
diet and prey consumption of grey seals ( halichoerus grypus ) in norway |
publisher |
Taylor & Francis |
publishDate |
2019 |
url |
https://dx.doi.org/10.6084/m9.figshare.8064014 https://tandf.figshare.com/articles/Diet_and_prey_consumption_of_grey_seals_i_Halichoerus_grypus_i_in_Norway/8064014 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Finnmark Gadus morhua Nordland Nordland Finnmark Nordland |
genre_facet |
Finnmark Gadus morhua Nordland Nordland Finnmark Nordland |
op_relation |
https://dx.doi.org/10.1080/17451000.2019.1605182 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.8064014 https://doi.org/10.1080/17451000.2019.1605182 |
_version_ |
1765999403770839040 |