Monitoring of the Pasvik-Inari-Pechenga brown bear population in 2007 and 2011 using hair-trapping
The trans-border brown bear population of Pasvik-Inari-Pechenga (Norway-Finland-Russia) has been monitored using genetic analyses of feces collection since 2005. In addition in 2007, hair traps were systematically placed out in the area to collect hairs for genetic analysis, to more precisely determ...
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ftnibiocom:oai:brage.bibsys.no:11250/2460174 2023-05-15T16:53:45+02:00 Monitoring of the Pasvik-Inari-Pechenga brown bear population in 2007 and 2011 using hair-trapping Kopatz, Alexander Eiken, Hans Geir Aspholm, Paul Eric Tobiassen, Camilla Bakke, Beate Banken Schregel, Julia Ollila, Tuomo Makarova, Olga Polikarpova, Natalia Chizhov, Vladimir Hagen, Snorre Norway, Finland, Russia, Kautokeino (NO), Inari (FI), Pechenga (RU) 2017-10-14T21:45:55Z http://hdl.handle.net/11250/2460174 eng eng Bioforsk Bioforsk Rapport Bioforsk rapport;6(148) 2011 Bioforsk: 8129 27 6 148 Hårfeller Hair snares Brunbjørn Brown bear Bestandsovervåkning Population Monitoring Molekylær økologi Molecular ecology VDP::Naturressursforvaltning: 914 VDP::Natural resource management: 914 Research report 2017 ftnibiocom 2018-08-13T13:09:18Z The trans-border brown bear population of Pasvik-Inari-Pechenga (Norway-Finland-Russia) has been monitored using genetic analyses of feces collection since 2005. In addition in 2007, hair traps were systematically placed out in the area to collect hairs for genetic analysis, to more precisely determine the minimum numbers of bears. In 2011, we repeated this hair trap study, using the exact same methodology as in 2007, to make a direct comparison of the results from the two years. Brown bear DNA was detected in 68 of 88 hair samples (77%) obtained from hair traps in 2011 and for 56 of these samples, a complete DNA profile could be determined. We identified 20 different bears in 2011, 12 females and 8 males. Only one bear was found in more than one country (Norway and Russia). We detected 11 bears in Norway, 7 bears in Finland and 3 bears in Russia in 2011. Four of these 20 bears were previously unknown, all four from Finland. A comparison of the results from 2007 and 2011 showed that we detected fewer bears in hair traps in 2011 (20 bears) than in 2007 (24 bears), but this modest difference may be coincidental. However, we observed a large drop in the yield of hair samples in the traps in 2011 compared to 2007 (88 versus 196 samples). This observation may be suggestive of some reduced activity of bears within the study area in 2011. In addition, only five (21%) of the bears caught in hair traps in 2007 were recaptured in 2011, which indicates a substantial turnover of individuals and may indicate that more frequent hair trapping monitoring would be beneficial to reliably track changes in the population. Additional samples (mainly scats) collected opportunistically in the field within the Russian and Finnish parts of the study area in 2011 detected four male bears in the Finnish part that had not been detected by hair traps. No additional samples from Norway were included to this study and any comparisons between the hair-trapping and opportunistic sampling at this point remains difficult. However, the results indicate that both methods combined are currently the most feasible methods to monitor brown bear numbers in an area. publishedVersion Report Inari Kautokeino Pasvik Norwegian Institute of Bioeconomy Research: NIBIO Brage Inari ENVELOPE(27.029,27.029,68.906,68.906) Kautokeino ENVELOPE(23.048,23.048,69.003,69.003) Norway Pasvik ENVELOPE(30.580,30.580,69.810,69.810) Pechenga ENVELOPE(30.989,30.989,69.401,69.401) |
institution |
Open Polar |
collection |
Norwegian Institute of Bioeconomy Research: NIBIO Brage |
op_collection_id |
ftnibiocom |
language |
English |
topic |
Hårfeller Hair snares Brunbjørn Brown bear Bestandsovervåkning Population Monitoring Molekylær økologi Molecular ecology VDP::Naturressursforvaltning: 914 VDP::Natural resource management: 914 |
spellingShingle |
Hårfeller Hair snares Brunbjørn Brown bear Bestandsovervåkning Population Monitoring Molekylær økologi Molecular ecology VDP::Naturressursforvaltning: 914 VDP::Natural resource management: 914 Kopatz, Alexander Eiken, Hans Geir Aspholm, Paul Eric Tobiassen, Camilla Bakke, Beate Banken Schregel, Julia Ollila, Tuomo Makarova, Olga Polikarpova, Natalia Chizhov, Vladimir Hagen, Snorre Monitoring of the Pasvik-Inari-Pechenga brown bear population in 2007 and 2011 using hair-trapping |
topic_facet |
Hårfeller Hair snares Brunbjørn Brown bear Bestandsovervåkning Population Monitoring Molekylær økologi Molecular ecology VDP::Naturressursforvaltning: 914 VDP::Natural resource management: 914 |
description |
The trans-border brown bear population of Pasvik-Inari-Pechenga (Norway-Finland-Russia) has been monitored using genetic analyses of feces collection since 2005. In addition in 2007, hair traps were systematically placed out in the area to collect hairs for genetic analysis, to more precisely determine the minimum numbers of bears. In 2011, we repeated this hair trap study, using the exact same methodology as in 2007, to make a direct comparison of the results from the two years. Brown bear DNA was detected in 68 of 88 hair samples (77%) obtained from hair traps in 2011 and for 56 of these samples, a complete DNA profile could be determined. We identified 20 different bears in 2011, 12 females and 8 males. Only one bear was found in more than one country (Norway and Russia). We detected 11 bears in Norway, 7 bears in Finland and 3 bears in Russia in 2011. Four of these 20 bears were previously unknown, all four from Finland. A comparison of the results from 2007 and 2011 showed that we detected fewer bears in hair traps in 2011 (20 bears) than in 2007 (24 bears), but this modest difference may be coincidental. However, we observed a large drop in the yield of hair samples in the traps in 2011 compared to 2007 (88 versus 196 samples). This observation may be suggestive of some reduced activity of bears within the study area in 2011. In addition, only five (21%) of the bears caught in hair traps in 2007 were recaptured in 2011, which indicates a substantial turnover of individuals and may indicate that more frequent hair trapping monitoring would be beneficial to reliably track changes in the population. Additional samples (mainly scats) collected opportunistically in the field within the Russian and Finnish parts of the study area in 2011 detected four male bears in the Finnish part that had not been detected by hair traps. No additional samples from Norway were included to this study and any comparisons between the hair-trapping and opportunistic sampling at this point remains difficult. However, the results indicate that both methods combined are currently the most feasible methods to monitor brown bear numbers in an area. publishedVersion |
format |
Report |
author |
Kopatz, Alexander Eiken, Hans Geir Aspholm, Paul Eric Tobiassen, Camilla Bakke, Beate Banken Schregel, Julia Ollila, Tuomo Makarova, Olga Polikarpova, Natalia Chizhov, Vladimir Hagen, Snorre |
author_facet |
Kopatz, Alexander Eiken, Hans Geir Aspholm, Paul Eric Tobiassen, Camilla Bakke, Beate Banken Schregel, Julia Ollila, Tuomo Makarova, Olga Polikarpova, Natalia Chizhov, Vladimir Hagen, Snorre |
author_sort |
Kopatz, Alexander |
title |
Monitoring of the Pasvik-Inari-Pechenga brown bear population in 2007 and 2011 using hair-trapping |
title_short |
Monitoring of the Pasvik-Inari-Pechenga brown bear population in 2007 and 2011 using hair-trapping |
title_full |
Monitoring of the Pasvik-Inari-Pechenga brown bear population in 2007 and 2011 using hair-trapping |
title_fullStr |
Monitoring of the Pasvik-Inari-Pechenga brown bear population in 2007 and 2011 using hair-trapping |
title_full_unstemmed |
Monitoring of the Pasvik-Inari-Pechenga brown bear population in 2007 and 2011 using hair-trapping |
title_sort |
monitoring of the pasvik-inari-pechenga brown bear population in 2007 and 2011 using hair-trapping |
publisher |
Bioforsk |
publishDate |
2017 |
url |
http://hdl.handle.net/11250/2460174 |
op_coverage |
Norway, Finland, Russia, Kautokeino (NO), Inari (FI), Pechenga (RU) |
long_lat |
ENVELOPE(27.029,27.029,68.906,68.906) ENVELOPE(23.048,23.048,69.003,69.003) ENVELOPE(30.580,30.580,69.810,69.810) ENVELOPE(30.989,30.989,69.401,69.401) |
geographic |
Inari Kautokeino Norway Pasvik Pechenga |
geographic_facet |
Inari Kautokeino Norway Pasvik Pechenga |
genre |
Inari Kautokeino Pasvik |
genre_facet |
Inari Kautokeino Pasvik |
op_source |
27 6 148 |
op_relation |
Bioforsk Rapport Bioforsk rapport;6(148) 2011 Bioforsk: 8129 |
_version_ |
1766044322949496832 |