Age and size of migrating Atlantic salmon, Salmo salar L., and sea trout, Salmo trutta L., smolts in Lithuanian rivers
The aim of the present study was to determine the mean size and age of migrating salmon, Salmo salar L., and sea trout, Salmo trutta L., smolts in three rivers of the Nemunas River drainage area from different climatic sub-regions in Lithuania. Research indicates there were significant differences o...
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ftlithuaniansrc:oai:elaba:5987577 2023-05-15T15:32:29+02:00 Age and size of migrating Atlantic salmon, Salmo salar L., and sea trout, Salmo trutta L., smolts in Lithuanian rivers Skrupskelis, Kęstutis Stakėnas, Saulius Virbickas, Tomas Nika, Nerijus 2012 http://lmavb.lvb.lt/LMAVB:ELABAPDB5987577&prefLang=en_US eng eng info:eu-repo/semantics/altIdentifier/doi/10.2478/v10086-012-0029-8 http://lmavb.lvb.lt/LMAVB:ELABAPDB5987577&prefLang=en_US Archives of Polish fisheries, 2012, vol. 20, iss. 4, 257-266 ISSN 1230-6428 Wild population Smolt migration Age Stocking impact Stream salmonids info:eu-repo/semantics/article 2012 ftlithuaniansrc https://doi.org/10.2478/v10086-012-0029-8 2021-12-02T00:33:18Z The aim of the present study was to determine the mean size and age of migrating salmon, Salmo salar L., and sea trout, Salmo trutta L., smolts in three rivers of the Nemunas River drainage area from different climatic sub-regions in Lithuania. Research indicates there were significant differences of migrating fish age and size between stocked and natural smolt populations. In natural populations salmon and sea trout smolts aged 2+ dominated, but up to 82% of all migrating smolts of the stocked population in Siesartis River were aged 1+. The artificially-reared salmon and sea trout smolts in the Siesartis River were significantly larger than wild fish in the 1+ age group of migrants, and, accordingly, they reached smolt size and were ready to migrate earlier. The high density of salmonid parrs in the Siesartis River and intraspecific competition could have also prompted 1+ age group smolts to migrate. It is hypothesized that the phenomenon of early smolt migration in the Siesartis River could have been a local adaptation to the long migration route, or it could have resulted from density-dependent competition caused by imbalanced stocking programs. Article in Journal/Newspaper Atlantic salmon Salmo salar LSRC VL (Lithuanian Social Research Centre Virtual Library) Archives of Polish Fisheries 20 4 |
institution |
Open Polar |
collection |
LSRC VL (Lithuanian Social Research Centre Virtual Library) |
op_collection_id |
ftlithuaniansrc |
language |
English |
topic |
Wild population Smolt migration Age Stocking impact Stream salmonids |
spellingShingle |
Wild population Smolt migration Age Stocking impact Stream salmonids Skrupskelis, Kęstutis Stakėnas, Saulius Virbickas, Tomas Nika, Nerijus Age and size of migrating Atlantic salmon, Salmo salar L., and sea trout, Salmo trutta L., smolts in Lithuanian rivers |
topic_facet |
Wild population Smolt migration Age Stocking impact Stream salmonids |
description |
The aim of the present study was to determine the mean size and age of migrating salmon, Salmo salar L., and sea trout, Salmo trutta L., smolts in three rivers of the Nemunas River drainage area from different climatic sub-regions in Lithuania. Research indicates there were significant differences of migrating fish age and size between stocked and natural smolt populations. In natural populations salmon and sea trout smolts aged 2+ dominated, but up to 82% of all migrating smolts of the stocked population in Siesartis River were aged 1+. The artificially-reared salmon and sea trout smolts in the Siesartis River were significantly larger than wild fish in the 1+ age group of migrants, and, accordingly, they reached smolt size and were ready to migrate earlier. The high density of salmonid parrs in the Siesartis River and intraspecific competition could have also prompted 1+ age group smolts to migrate. It is hypothesized that the phenomenon of early smolt migration in the Siesartis River could have been a local adaptation to the long migration route, or it could have resulted from density-dependent competition caused by imbalanced stocking programs. |
format |
Article in Journal/Newspaper |
author |
Skrupskelis, Kęstutis Stakėnas, Saulius Virbickas, Tomas Nika, Nerijus |
author_facet |
Skrupskelis, Kęstutis Stakėnas, Saulius Virbickas, Tomas Nika, Nerijus |
author_sort |
Skrupskelis, Kęstutis |
title |
Age and size of migrating Atlantic salmon, Salmo salar L., and sea trout, Salmo trutta L., smolts in Lithuanian rivers |
title_short |
Age and size of migrating Atlantic salmon, Salmo salar L., and sea trout, Salmo trutta L., smolts in Lithuanian rivers |
title_full |
Age and size of migrating Atlantic salmon, Salmo salar L., and sea trout, Salmo trutta L., smolts in Lithuanian rivers |
title_fullStr |
Age and size of migrating Atlantic salmon, Salmo salar L., and sea trout, Salmo trutta L., smolts in Lithuanian rivers |
title_full_unstemmed |
Age and size of migrating Atlantic salmon, Salmo salar L., and sea trout, Salmo trutta L., smolts in Lithuanian rivers |
title_sort |
age and size of migrating atlantic salmon, salmo salar l., and sea trout, salmo trutta l., smolts in lithuanian rivers |
publishDate |
2012 |
url |
http://lmavb.lvb.lt/LMAVB:ELABAPDB5987577&prefLang=en_US |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Archives of Polish fisheries, 2012, vol. 20, iss. 4, 257-266 ISSN 1230-6428 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.2478/v10086-012-0029-8 http://lmavb.lvb.lt/LMAVB:ELABAPDB5987577&prefLang=en_US |
op_doi |
https://doi.org/10.2478/v10086-012-0029-8 |
container_title |
Archives of Polish Fisheries |
container_volume |
20 |
container_issue |
4 |
_version_ |
1766362975791218688 |