Migration, growth patterns, and diet of pike (Esox lucius) in a riverreservoir and its inflowing river
The pike population in the Løpsjøen reservoir and the accessible 21 km section of the inflowing RiverRena was investigated from 2003 to 2013. Telemetry and mark-recapture with Floy tags demonstratedthat most fish had an annual home range of less than 2 km, while some fish performed quite extensivemi...
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Online Access: | http://hdl.handle.net/11250/2561721 https://doi.org/10.1016/j.fishres.2015.08.010 |
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ftninstnf:oai:brage.nina.no:11250/2561721 2023-05-15T15:47:19+02:00 Migration, growth patterns, and diet of pike (Esox lucius) in a riverreservoir and its inflowing river Sandlund, Odd Terje Museth, Jon Øistad, Sondre Rena, Hedmark, Noreg, Norge, Norway 2015 application/octet-stream http://hdl.handle.net/11250/2561721 https://doi.org/10.1016/j.fishres.2015.08.010 eng eng Norges forskningsråd: 221454 urn:issn:0165-7836 http://hdl.handle.net/11250/2561721 https://doi.org/10.1016/j.fishres.2015.08.010 cristin:1261124 Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no .© 2015 Elsevier B.V. CC-BY-NC-ND 53-60 173 Fisheries Research River fragmentation Predation Habitat utilization Habitat modification Northern pike VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 Journal article Peer reviewed 2015 ftninstnf https://doi.org/10.1016/j.fishres.2015.08.010 2021-12-23T07:16:46Z The pike population in the Løpsjøen reservoir and the accessible 21 km section of the inflowing RiverRena was investigated from 2003 to 2013. Telemetry and mark-recapture with Floy tags demonstratedthat most fish had an annual home range of less than 2 km, while some fish performed quite extensivemigrations (up to 14.4 km). Of fish radio-tagged in the reservoir, 57% were positioned in the river atleast once. The population of pike ≥25 cm was estimated at 1002 fish, or 3.9 fish (3.17 kg) ha−1. Meanlength at age was significantly larger for pike caught in the river than in the reservoir for almost all agegroups. CPUE during boat electro-fishing indicated significantly lower population densities and a lowerproportion of juvenile fish in the river than in the reservoir. Diet analysis revealed that almost all availableprey fish species were taken by pike, and that there was a clear diet differentiation between pike sizeclasses, and between fish from the river and reservoir habitats. Small pike (<25 cm) in the reservoir hadeaten mainly invertebrates, whereas smaller pike and Alpine bullhead (Cottus poecilopus) dominated insmall pike from the river. Nine prey fish species were identified in the stomachs of medium sized pike(25–50 cm) in the reservoir, with brook lamprey (Lampetra planeri) and brown trout (Salmo trutta) asdominant. Medium sized pike in the river had taken mainly lamprey and Alpine bullhead. Larger pike(>50 cm) in the reservoir had taken brown trout as well as a number of other prey fish, while river pike ofthis size had taken burbot (Lota lota), lamprey and brown trout. Species like perch (Perca fluviatilis), roach(Rutilus rutilus) and in particular grayling (Thymallus thymallus) were rarely found in pike stomachs. Theconstruction of the reservoir in a fast-flowing river caused the establishment of a healthy pike populationand additional predation pressure on the rheophilic salmonids in the system, both in the reservoir andin the inflowing river.© 2015 Elsevier B.V. All rights reserved. River fragmentation, Predation, Habitat utilization, Habitat modification, Northern pike acceptedVersion Article in Journal/Newspaper Burbot Lota lota lota Norwegian Institute for Nature Research: Brage NINA Norway Fisheries Research 173 53 60 |
institution |
Open Polar |
collection |
Norwegian Institute for Nature Research: Brage NINA |
op_collection_id |
ftninstnf |
language |
English |
topic |
River fragmentation Predation Habitat utilization Habitat modification Northern pike VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 |
spellingShingle |
River fragmentation Predation Habitat utilization Habitat modification Northern pike VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 Sandlund, Odd Terje Museth, Jon Øistad, Sondre Migration, growth patterns, and diet of pike (Esox lucius) in a riverreservoir and its inflowing river |
topic_facet |
River fragmentation Predation Habitat utilization Habitat modification Northern pike VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 |
description |
The pike population in the Løpsjøen reservoir and the accessible 21 km section of the inflowing RiverRena was investigated from 2003 to 2013. Telemetry and mark-recapture with Floy tags demonstratedthat most fish had an annual home range of less than 2 km, while some fish performed quite extensivemigrations (up to 14.4 km). Of fish radio-tagged in the reservoir, 57% were positioned in the river atleast once. The population of pike ≥25 cm was estimated at 1002 fish, or 3.9 fish (3.17 kg) ha−1. Meanlength at age was significantly larger for pike caught in the river than in the reservoir for almost all agegroups. CPUE during boat electro-fishing indicated significantly lower population densities and a lowerproportion of juvenile fish in the river than in the reservoir. Diet analysis revealed that almost all availableprey fish species were taken by pike, and that there was a clear diet differentiation between pike sizeclasses, and between fish from the river and reservoir habitats. Small pike (<25 cm) in the reservoir hadeaten mainly invertebrates, whereas smaller pike and Alpine bullhead (Cottus poecilopus) dominated insmall pike from the river. Nine prey fish species were identified in the stomachs of medium sized pike(25–50 cm) in the reservoir, with brook lamprey (Lampetra planeri) and brown trout (Salmo trutta) asdominant. Medium sized pike in the river had taken mainly lamprey and Alpine bullhead. Larger pike(>50 cm) in the reservoir had taken brown trout as well as a number of other prey fish, while river pike ofthis size had taken burbot (Lota lota), lamprey and brown trout. Species like perch (Perca fluviatilis), roach(Rutilus rutilus) and in particular grayling (Thymallus thymallus) were rarely found in pike stomachs. Theconstruction of the reservoir in a fast-flowing river caused the establishment of a healthy pike populationand additional predation pressure on the rheophilic salmonids in the system, both in the reservoir andin the inflowing river.© 2015 Elsevier B.V. All rights reserved. River fragmentation, Predation, Habitat utilization, Habitat modification, Northern pike acceptedVersion |
format |
Article in Journal/Newspaper |
author |
Sandlund, Odd Terje Museth, Jon Øistad, Sondre |
author_facet |
Sandlund, Odd Terje Museth, Jon Øistad, Sondre |
author_sort |
Sandlund, Odd Terje |
title |
Migration, growth patterns, and diet of pike (Esox lucius) in a riverreservoir and its inflowing river |
title_short |
Migration, growth patterns, and diet of pike (Esox lucius) in a riverreservoir and its inflowing river |
title_full |
Migration, growth patterns, and diet of pike (Esox lucius) in a riverreservoir and its inflowing river |
title_fullStr |
Migration, growth patterns, and diet of pike (Esox lucius) in a riverreservoir and its inflowing river |
title_full_unstemmed |
Migration, growth patterns, and diet of pike (Esox lucius) in a riverreservoir and its inflowing river |
title_sort |
migration, growth patterns, and diet of pike (esox lucius) in a riverreservoir and its inflowing river |
publishDate |
2015 |
url |
http://hdl.handle.net/11250/2561721 https://doi.org/10.1016/j.fishres.2015.08.010 |
op_coverage |
Rena, Hedmark, Noreg, Norge, Norway |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Burbot Lota lota lota |
genre_facet |
Burbot Lota lota lota |
op_source |
53-60 173 Fisheries Research |
op_relation |
Norges forskningsråd: 221454 urn:issn:0165-7836 http://hdl.handle.net/11250/2561721 https://doi.org/10.1016/j.fishres.2015.08.010 cristin:1261124 |
op_rights |
Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no .© 2015 Elsevier B.V. |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.fishres.2015.08.010 |
container_title |
Fisheries Research |
container_volume |
173 |
container_start_page |
53 |
op_container_end_page |
60 |
_version_ |
1766382097578065920 |