Arctic charr (Salvelinus alpinus) re-established in a formerly acidified and highly dilute mountain lake under declining acidic deposition
Arctic charr in Lake Ronvatn, a mountain lake in southern Norway was re-established through stocking. The population went extinction during the early 1980s due to acidification, when the lake was highly acidified with a mean pH of 5.2-5.4 with occasional declines to 4.3-4.7. However, from the mid to...
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Norwegian University of Science and Technology
2018
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Online Access: | https://doi.org/10.5324/fn.v38i0.2272 https://doaj.org/article/62706b9343e24849b2310a090a56636d |
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ftdoajarticles:oai:doaj.org/article:62706b9343e24849b2310a090a56636d 2023-05-15T14:29:42+02:00 Arctic charr (Salvelinus alpinus) re-established in a formerly acidified and highly dilute mountain lake under declining acidic deposition Trygve Hesthagen Randi Saksgård 2018-09-01T00:00:00Z https://doi.org/10.5324/fn.v38i0.2272 https://doaj.org/article/62706b9343e24849b2310a090a56636d EN eng Norwegian University of Science and Technology https://www.ntnu.no/ojs/index.php/fauna_norvegica/article/view/2272 https://doaj.org/toc/1502-4873 https://doaj.org/toc/1891-5396 doi:10.5324/fn.v38i0.2272 1502-4873 1891-5396 https://doaj.org/article/62706b9343e24849b2310a090a56636d Fauna Norvegica, Vol 38 (2018) lake acidification Arctic charr re-establishment Zoology QL1-991 article 2018 ftdoajarticles https://doi.org/10.5324/fn.v38i0.2272 2022-12-30T22:50:22Z Arctic charr in Lake Ronvatn, a mountain lake in southern Norway was re-established through stocking. The population went extinction during the early 1980s due to acidification, when the lake was highly acidified with a mean pH of 5.2-5.4 with occasional declines to 4.3-4.7. However, from the mid to late 1990s, the pH and acid-neutralising capacity (ANC) of the lake rose to 5.8-5.9 and 13-15 µeq L-1, respectively. The lake is extremely dilute with a mean conductivity and calcium concentration of 7.7 µS cm-1 and 0.35 mg L-1, respectively. The lake was stocked with 250 Arctic charr from a neighbouring lake between 1998 and 2000. These introductions were highly successful, as test-fishing in 2004, 2008 and 2012 revealed a relatively dense population of Arctic charr, and the presence of several young age groups. Water quality has remained stable since the late 1990s, or has slightly improved. Article in Journal/Newspaper Arctic charr Arctic Salvelinus alpinus Directory of Open Access Journals: DOAJ Articles Arctic Norway Fauna norvegica 38 30 36 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
lake acidification Arctic charr re-establishment Zoology QL1-991 |
spellingShingle |
lake acidification Arctic charr re-establishment Zoology QL1-991 Trygve Hesthagen Randi Saksgård Arctic charr (Salvelinus alpinus) re-established in a formerly acidified and highly dilute mountain lake under declining acidic deposition |
topic_facet |
lake acidification Arctic charr re-establishment Zoology QL1-991 |
description |
Arctic charr in Lake Ronvatn, a mountain lake in southern Norway was re-established through stocking. The population went extinction during the early 1980s due to acidification, when the lake was highly acidified with a mean pH of 5.2-5.4 with occasional declines to 4.3-4.7. However, from the mid to late 1990s, the pH and acid-neutralising capacity (ANC) of the lake rose to 5.8-5.9 and 13-15 µeq L-1, respectively. The lake is extremely dilute with a mean conductivity and calcium concentration of 7.7 µS cm-1 and 0.35 mg L-1, respectively. The lake was stocked with 250 Arctic charr from a neighbouring lake between 1998 and 2000. These introductions were highly successful, as test-fishing in 2004, 2008 and 2012 revealed a relatively dense population of Arctic charr, and the presence of several young age groups. Water quality has remained stable since the late 1990s, or has slightly improved. |
format |
Article in Journal/Newspaper |
author |
Trygve Hesthagen Randi Saksgård |
author_facet |
Trygve Hesthagen Randi Saksgård |
author_sort |
Trygve Hesthagen |
title |
Arctic charr (Salvelinus alpinus) re-established in a formerly acidified and highly dilute mountain lake under declining acidic deposition |
title_short |
Arctic charr (Salvelinus alpinus) re-established in a formerly acidified and highly dilute mountain lake under declining acidic deposition |
title_full |
Arctic charr (Salvelinus alpinus) re-established in a formerly acidified and highly dilute mountain lake under declining acidic deposition |
title_fullStr |
Arctic charr (Salvelinus alpinus) re-established in a formerly acidified and highly dilute mountain lake under declining acidic deposition |
title_full_unstemmed |
Arctic charr (Salvelinus alpinus) re-established in a formerly acidified and highly dilute mountain lake under declining acidic deposition |
title_sort |
arctic charr (salvelinus alpinus) re-established in a formerly acidified and highly dilute mountain lake under declining acidic deposition |
publisher |
Norwegian University of Science and Technology |
publishDate |
2018 |
url |
https://doi.org/10.5324/fn.v38i0.2272 https://doaj.org/article/62706b9343e24849b2310a090a56636d |
geographic |
Arctic Norway |
geographic_facet |
Arctic Norway |
genre |
Arctic charr Arctic Salvelinus alpinus |
genre_facet |
Arctic charr Arctic Salvelinus alpinus |
op_source |
Fauna Norvegica, Vol 38 (2018) |
op_relation |
https://www.ntnu.no/ojs/index.php/fauna_norvegica/article/view/2272 https://doaj.org/toc/1502-4873 https://doaj.org/toc/1891-5396 doi:10.5324/fn.v38i0.2272 1502-4873 1891-5396 https://doaj.org/article/62706b9343e24849b2310a090a56636d |
op_doi |
https://doi.org/10.5324/fn.v38i0.2272 |
container_title |
Fauna norvegica |
container_volume |
38 |
container_start_page |
30 |
op_container_end_page |
36 |
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1766303684010967040 |