Effects of Lake Productivity on Density and Size Structure of Pelagic Fish Estimated by Means of Echosounding in 17 Lakes in Southeast Norway
Density estimation of pelagic fish was performed by means of single beam echosounding in 17 lakes within a period of 34 years, from 1985 to 2018. Surveys were performed repeatedly (two to fourteen times) in five lakes. The density estimates ranged from 34 to 4720 fish/ha and were significantly corre...
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Online Access: | https://hdl.handle.net/11250/2999948 https://doi.org/10.3390/s21103391 |
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fthsinnlandet:oai:brage.inn.no:11250/2999948 2024-03-03T08:40:18+00:00 Effects of Lake Productivity on Density and Size Structure of Pelagic Fish Estimated by Means of Echosounding in 17 Lakes in Southeast Norway Linløkken, Arne Norway 2021 application/pdf https://hdl.handle.net/11250/2999948 https://doi.org/10.3390/s21103391 eng eng urn:issn:1424-8220 https://hdl.handle.net/11250/2999948 https://doi.org/10.3390/s21103391 cristin:1989070 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no 21 Sensors 10 3391 fish species species characteristics zooplankton predation algae phosphorus development VDP::Matematikk og Naturvitenskap: 400 Peer reviewed Journal article 2021 fthsinnlandet https://doi.org/10.3390/s21103391 2024-02-02T12:42:05Z Density estimation of pelagic fish was performed by means of single beam echosounding in 17 lakes within a period of 34 years, from 1985 to 2018. Surveys were performed repeatedly (two to fourteen times) in five lakes. The density estimates ranged from 34 to 4720 fish/ha and were significantly correlated with total phosphorus concentration. The high density in relatively phosphorus rich lakes (TP > 10 µg/L) was comprised of small fish (<20 cm) and was partly due to the higher number of pelagic fish species. The number of pelagic species varied from one, Arctic charr, in the most elevated and oligotrophic lakes, and whitefish dominated in less elevated oligotrophic lakes. In lowland lakes characterized as mesotrophic or tending to mesotrophy, smelt, vendace, and two to three cyprinids comprised the pelagic fish stock. These fish species predate zooplankton effectively, and species composition and body size of planktonic cladocerans was affected by fish density. Large species of Daphnia were lacking in lakes with high fish density, and body size of present species, D. galeata, D. cristata, and Bosmina spp. were negatively correlated with pelagic fish density. publishedVersion Article in Journal/Newspaper Arctic charr Arctic Zooplankton Høgskolen i Innlandet: Brage INN Arctic Norway Sensors 21 10 3391 |
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Open Polar |
collection |
Høgskolen i Innlandet: Brage INN |
op_collection_id |
fthsinnlandet |
language |
English |
topic |
fish species species characteristics zooplankton predation algae phosphorus development VDP::Matematikk og Naturvitenskap: 400 |
spellingShingle |
fish species species characteristics zooplankton predation algae phosphorus development VDP::Matematikk og Naturvitenskap: 400 Linløkken, Arne Effects of Lake Productivity on Density and Size Structure of Pelagic Fish Estimated by Means of Echosounding in 17 Lakes in Southeast Norway |
topic_facet |
fish species species characteristics zooplankton predation algae phosphorus development VDP::Matematikk og Naturvitenskap: 400 |
description |
Density estimation of pelagic fish was performed by means of single beam echosounding in 17 lakes within a period of 34 years, from 1985 to 2018. Surveys were performed repeatedly (two to fourteen times) in five lakes. The density estimates ranged from 34 to 4720 fish/ha and were significantly correlated with total phosphorus concentration. The high density in relatively phosphorus rich lakes (TP > 10 µg/L) was comprised of small fish (<20 cm) and was partly due to the higher number of pelagic fish species. The number of pelagic species varied from one, Arctic charr, in the most elevated and oligotrophic lakes, and whitefish dominated in less elevated oligotrophic lakes. In lowland lakes characterized as mesotrophic or tending to mesotrophy, smelt, vendace, and two to three cyprinids comprised the pelagic fish stock. These fish species predate zooplankton effectively, and species composition and body size of planktonic cladocerans was affected by fish density. Large species of Daphnia were lacking in lakes with high fish density, and body size of present species, D. galeata, D. cristata, and Bosmina spp. were negatively correlated with pelagic fish density. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Linløkken, Arne |
author_facet |
Linløkken, Arne |
author_sort |
Linløkken, Arne |
title |
Effects of Lake Productivity on Density and Size Structure of Pelagic Fish Estimated by Means of Echosounding in 17 Lakes in Southeast Norway |
title_short |
Effects of Lake Productivity on Density and Size Structure of Pelagic Fish Estimated by Means of Echosounding in 17 Lakes in Southeast Norway |
title_full |
Effects of Lake Productivity on Density and Size Structure of Pelagic Fish Estimated by Means of Echosounding in 17 Lakes in Southeast Norway |
title_fullStr |
Effects of Lake Productivity on Density and Size Structure of Pelagic Fish Estimated by Means of Echosounding in 17 Lakes in Southeast Norway |
title_full_unstemmed |
Effects of Lake Productivity on Density and Size Structure of Pelagic Fish Estimated by Means of Echosounding in 17 Lakes in Southeast Norway |
title_sort |
effects of lake productivity on density and size structure of pelagic fish estimated by means of echosounding in 17 lakes in southeast norway |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/2999948 https://doi.org/10.3390/s21103391 |
op_coverage |
Norway |
geographic |
Arctic Norway |
geographic_facet |
Arctic Norway |
genre |
Arctic charr Arctic Zooplankton |
genre_facet |
Arctic charr Arctic Zooplankton |
op_source |
21 Sensors 10 3391 |
op_relation |
urn:issn:1424-8220 https://hdl.handle.net/11250/2999948 https://doi.org/10.3390/s21103391 cristin:1989070 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no |
op_doi |
https://doi.org/10.3390/s21103391 |
container_title |
Sensors |
container_volume |
21 |
container_issue |
10 |
container_start_page |
3391 |
_version_ |
1792496039495729152 |