Status of the Tana/Teno River salmon populations in 2019
Anon. 2019. Status of the Tana/Teno River salmon populations in 2019. Report from the Tana Monitoring and Research Group nr 1/2019. This report is the third status assessment of the re-established Tana Monitoring and Research Group (MRG) after the new agreement between Norway and Finland. After a su...
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Tana Monitoring and Research Group
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ftninstnf:oai:brage.nina.no:11250/2634292 2023-05-15T18:10:02+02:00 Status of the Tana/Teno River salmon populations in 2019 Falkegård, Morten Orell, Panu Foldvik, Anders Erkinaro, Jaakko 2020 application/octet-stream http://hdl.handle.net/11250/2634292 eng eng Tana Monitoring and Research Group Report from the Tana Monitoring and Research Group;nr 1/2019 urn:isbn:978-82-93716-03-7 urn:issn:2535-4701 http://hdl.handle.net/11250/2634292 © The Tana Monitoring and Research Group 94 Report from the Tana Monitoring and Research Group exploitation fisheries management management targets mixed-stock fishery monitoring overexploitation pre-fishery abundance Salmo salar spawning targets status assessment status evaluation stock recovery stock status VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 Research report 2020 ftninstnf 2023-02-15T23:46:07Z Anon. 2019. Status of the Tana/Teno River salmon populations in 2019. Report from the Tana Monitoring and Research Group nr 1/2019. This report is the third status assessment of the re-established Tana Monitoring and Research Group (MRG) after the new agreement between Norway and Finland. After a summary of salmon monitoring time series in Tana/Teno, we present an updated status assessment of 15 stocks/areas of the Tana/Teno river system. All stocks are evaluated in terms of a management target defined as a 75 % probability that the spawning target has been met over the last four years. A scale of four years has been chosen to dampen the effect of annual variation on the status. The map below summarizes the 2016-2019 stock status of the evaluated parts of the Tana/Teno river system. Symbol colour designates stock status over the last four years, classified into five groups with the following definitions: 1) Probability of reaching the spawning target over the last four years higher than 75 % and attainment higher than 140 % (dark green color in the summary map below) 2) Probability higher than 75 %, attainment lower than 140 % (light green) 3) Probability between 40 and 75 % (yellow) 4) Probability under 40 %, at least three of the four years with exploitable surplus (orange) 5) Probability under 40 %, more than one year without exploitable surplus (red) Stock status over the last four years (2016-2019) was poor (probability of reaching management target <40 %) in 7 of the 15 stocks that we evaluated. The best status was found in Veahčajohka/Vetsijoki, Ohcejohka/Utsjoki and Báišjohka. Of the stocks with poor status, the most important thing to note is the status of the upper main headwater areas of Kárášjohka, Iešjohka and Anárjohka/Inarijoki and of the Tana/Teno main stem. These areas had low target attainment and low exploitable surplus. These four areas constitute 84 % of the total Tana/Teno spawning target and over the last four years, these areas together have lacked an average of 30 000 kg female ... Report Salmo salar Utsjoki Norwegian Institute for Nature Research: Brage NINA Norway Teno ENVELOPE(25.690,25.690,68.925,68.925) Kárášjohka ENVELOPE(25.805,25.805,69.434,69.434) Inarijoki ENVELOPE(25.817,25.817,69.442,69.442) Vetsijoki ENVELOPE(27.300,27.300,69.965,69.965) Báišjohka ENVELOPE(26.181,26.181,69.764,69.764) |
institution |
Open Polar |
collection |
Norwegian Institute for Nature Research: Brage NINA |
op_collection_id |
ftninstnf |
language |
English |
topic |
Report from the Tana Monitoring and Research Group exploitation fisheries management management targets mixed-stock fishery monitoring overexploitation pre-fishery abundance Salmo salar spawning targets status assessment status evaluation stock recovery stock status VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 |
spellingShingle |
Report from the Tana Monitoring and Research Group exploitation fisheries management management targets mixed-stock fishery monitoring overexploitation pre-fishery abundance Salmo salar spawning targets status assessment status evaluation stock recovery stock status VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 Falkegård, Morten Orell, Panu Foldvik, Anders Erkinaro, Jaakko Status of the Tana/Teno River salmon populations in 2019 |
topic_facet |
Report from the Tana Monitoring and Research Group exploitation fisheries management management targets mixed-stock fishery monitoring overexploitation pre-fishery abundance Salmo salar spawning targets status assessment status evaluation stock recovery stock status VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 |
description |
Anon. 2019. Status of the Tana/Teno River salmon populations in 2019. Report from the Tana Monitoring and Research Group nr 1/2019. This report is the third status assessment of the re-established Tana Monitoring and Research Group (MRG) after the new agreement between Norway and Finland. After a summary of salmon monitoring time series in Tana/Teno, we present an updated status assessment of 15 stocks/areas of the Tana/Teno river system. All stocks are evaluated in terms of a management target defined as a 75 % probability that the spawning target has been met over the last four years. A scale of four years has been chosen to dampen the effect of annual variation on the status. The map below summarizes the 2016-2019 stock status of the evaluated parts of the Tana/Teno river system. Symbol colour designates stock status over the last four years, classified into five groups with the following definitions: 1) Probability of reaching the spawning target over the last four years higher than 75 % and attainment higher than 140 % (dark green color in the summary map below) 2) Probability higher than 75 %, attainment lower than 140 % (light green) 3) Probability between 40 and 75 % (yellow) 4) Probability under 40 %, at least three of the four years with exploitable surplus (orange) 5) Probability under 40 %, more than one year without exploitable surplus (red) Stock status over the last four years (2016-2019) was poor (probability of reaching management target <40 %) in 7 of the 15 stocks that we evaluated. The best status was found in Veahčajohka/Vetsijoki, Ohcejohka/Utsjoki and Báišjohka. Of the stocks with poor status, the most important thing to note is the status of the upper main headwater areas of Kárášjohka, Iešjohka and Anárjohka/Inarijoki and of the Tana/Teno main stem. These areas had low target attainment and low exploitable surplus. These four areas constitute 84 % of the total Tana/Teno spawning target and over the last four years, these areas together have lacked an average of 30 000 kg female ... |
format |
Report |
author |
Falkegård, Morten Orell, Panu Foldvik, Anders Erkinaro, Jaakko |
author_facet |
Falkegård, Morten Orell, Panu Foldvik, Anders Erkinaro, Jaakko |
author_sort |
Falkegård, Morten |
title |
Status of the Tana/Teno River salmon populations in 2019 |
title_short |
Status of the Tana/Teno River salmon populations in 2019 |
title_full |
Status of the Tana/Teno River salmon populations in 2019 |
title_fullStr |
Status of the Tana/Teno River salmon populations in 2019 |
title_full_unstemmed |
Status of the Tana/Teno River salmon populations in 2019 |
title_sort |
status of the tana/teno river salmon populations in 2019 |
publisher |
Tana Monitoring and Research Group |
publishDate |
2020 |
url |
http://hdl.handle.net/11250/2634292 |
long_lat |
ENVELOPE(25.690,25.690,68.925,68.925) ENVELOPE(25.805,25.805,69.434,69.434) ENVELOPE(25.817,25.817,69.442,69.442) ENVELOPE(27.300,27.300,69.965,69.965) ENVELOPE(26.181,26.181,69.764,69.764) |
geographic |
Norway Teno Kárášjohka Inarijoki Vetsijoki Báišjohka |
geographic_facet |
Norway Teno Kárášjohka Inarijoki Vetsijoki Báišjohka |
genre |
Salmo salar Utsjoki |
genre_facet |
Salmo salar Utsjoki |
op_source |
94 |
op_relation |
Report from the Tana Monitoring and Research Group;nr 1/2019 urn:isbn:978-82-93716-03-7 urn:issn:2535-4701 http://hdl.handle.net/11250/2634292 |
op_rights |
© The Tana Monitoring and Research Group |
_version_ |
1766182772498497536 |