Effects of a dispersal barrier on freshwater migration of the vimba bream (Vimba vimba)
To study the effects of a dispersal barrier on migration of the semi-anadromous vimba bream in the Pärnu River, Estonia, we tagged thirty fish with acoustic transmitters and released above the barrier. Tagged fish showed variation in behaviour, and 16 different spawning movement patterns were identi...
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ftninstnf:oai:brage.nina.no:11250/2580521 2023-05-15T15:45:37+02:00 Effects of a dispersal barrier on freshwater migration of the vimba bream (Vimba vimba) Tambets, Meelis Kärgenberg, Einar Thorstad, Eva Bonsak Sandlund, Odd Terje Økland, Finn Thalfeldt, Mart Estonia, Estland 2018 application/octet-stream http://hdl.handle.net/11250/2580521 eng eng Andre: Estonian Environment Agency (project no. 3.-3/63) Boreal environment research. 2018, 23 339-353. urn:issn:1239-6095 http://hdl.handle.net/11250/2580521 cristin:1645088 339-353 23 Boreal environment research VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 Journal article Peer reviewed 2018 ftninstnf 2021-12-23T07:17:03Z To study the effects of a dispersal barrier on migration of the semi-anadromous vimba bream in the Pärnu River, Estonia, we tagged thirty fish with acoustic transmitters and released above the barrier. Tagged fish showed variation in behaviour, and 16 different spawning movement patterns were identified. Several fish moved > 25 km upstream. Batch spawning was suggested by stops in up to four different spawning areas. The Fish descended to the sea after spawning in spring; females earlier than males. After spending on average 137 days in the sea, they returned to the river during autumn and stayed in the river on average 174 days until the next spawning. The fish were most active during sunrise and sunset. In conclusion, the study shows that the dam prevents a diversification of migration behaviour and the associated expansion of spawning areas. A more efficient fishway could promote population growth and improve stock status. Effects of a dispersal barrier on freshwater migration of the vimba bream (Vimba vimba) publishedVersion Article in Journal/Newspaper Boreal Environment Research Norwegian Institute for Nature Research: Brage NINA |
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Open Polar |
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Norwegian Institute for Nature Research: Brage NINA |
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ftninstnf |
language |
English |
topic |
VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 |
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VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 Tambets, Meelis Kärgenberg, Einar Thorstad, Eva Bonsak Sandlund, Odd Terje Økland, Finn Thalfeldt, Mart Effects of a dispersal barrier on freshwater migration of the vimba bream (Vimba vimba) |
topic_facet |
VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 |
description |
To study the effects of a dispersal barrier on migration of the semi-anadromous vimba bream in the Pärnu River, Estonia, we tagged thirty fish with acoustic transmitters and released above the barrier. Tagged fish showed variation in behaviour, and 16 different spawning movement patterns were identified. Several fish moved > 25 km upstream. Batch spawning was suggested by stops in up to four different spawning areas. The Fish descended to the sea after spawning in spring; females earlier than males. After spending on average 137 days in the sea, they returned to the river during autumn and stayed in the river on average 174 days until the next spawning. The fish were most active during sunrise and sunset. In conclusion, the study shows that the dam prevents a diversification of migration behaviour and the associated expansion of spawning areas. A more efficient fishway could promote population growth and improve stock status. Effects of a dispersal barrier on freshwater migration of the vimba bream (Vimba vimba) publishedVersion |
format |
Article in Journal/Newspaper |
author |
Tambets, Meelis Kärgenberg, Einar Thorstad, Eva Bonsak Sandlund, Odd Terje Økland, Finn Thalfeldt, Mart |
author_facet |
Tambets, Meelis Kärgenberg, Einar Thorstad, Eva Bonsak Sandlund, Odd Terje Økland, Finn Thalfeldt, Mart |
author_sort |
Tambets, Meelis |
title |
Effects of a dispersal barrier on freshwater migration of the vimba bream (Vimba vimba) |
title_short |
Effects of a dispersal barrier on freshwater migration of the vimba bream (Vimba vimba) |
title_full |
Effects of a dispersal barrier on freshwater migration of the vimba bream (Vimba vimba) |
title_fullStr |
Effects of a dispersal barrier on freshwater migration of the vimba bream (Vimba vimba) |
title_full_unstemmed |
Effects of a dispersal barrier on freshwater migration of the vimba bream (Vimba vimba) |
title_sort |
effects of a dispersal barrier on freshwater migration of the vimba bream (vimba vimba) |
publishDate |
2018 |
url |
http://hdl.handle.net/11250/2580521 |
op_coverage |
Estonia, Estland |
genre |
Boreal Environment Research |
genre_facet |
Boreal Environment Research |
op_source |
339-353 23 Boreal environment research |
op_relation |
Andre: Estonian Environment Agency (project no. 3.-3/63) Boreal environment research. 2018, 23 339-353. urn:issn:1239-6095 http://hdl.handle.net/11250/2580521 cristin:1645088 |
_version_ |
1766380039967866880 |