"Genetics of the Scandinavian brown bear (Ursus arctos): implication for biology and conservation"
This thesis deals with the application of molecular tools, combined with field data, in wildlife management, in conservation and in understanding species' biology and behavior. We used the brown bear (Ursus arctos) as a model species and the Scandinavian bear population as a case study. The fir...
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Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
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Online Access: | https://theses.hal.science/tel-00122944 https://theses.hal.science/tel-00122944/document https://theses.hal.science/tel-00122944/file/These_Eva_Bellemain.pdf |
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ftunivnantes:oai:HAL:tel-00122944v1 2023-05-15T18:41:53+02:00 "Genetics of the Scandinavian brown bear (Ursus arctos): implication for biology and conservation" Bellemain, Eva Laboratoire d'Ecologie Alpine (LECA) Université Joseph Fourier - Grenoble 1 (UJF)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Université Joseph-Fourier - Grenoble I Dr Pierre Taberlet - Pr Jon Swenson (cotutelle)(pierre.taberlet@ujf-grenoble.fr - jon.swenson@umb.no) Scandinavian Brown Bear Research Project Norvège 2004-11-12 https://theses.hal.science/tel-00122944 https://theses.hal.science/tel-00122944/document https://theses.hal.science/tel-00122944/file/These_Eva_Bellemain.pdf en eng HAL CCSD tel-00122944 https://theses.hal.science/tel-00122944 https://theses.hal.science/tel-00122944/document https://theses.hal.science/tel-00122944/file/These_Eva_Bellemain.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-00122944 Ecology, environment. Université Joseph-Fourier - Grenoble I, 2004. English. ⟨NNT : ⟩ genetics population size estimates mate choice non invasive methods mating system genotyping errors parentage analysis Ursus arctos génétique conservation estimation de tailles de populations infanticide choix du partenaire méthodes non invasive système d'appariement erreurs de genotypage analyse de parenté [SDV.EE]Life Sciences [q-bio]/Ecology environment info:eu-repo/semantics/doctoralThesis Theses 2004 ftunivnantes 2023-03-08T07:19:39Z This thesis deals with the application of molecular tools, combined with field data, in wildlife management, in conservation and in understanding species' biology and behavior. We used the brown bear (Ursus arctos) as a model species and the Scandinavian bear population as a case study. The first part of this thesis is a methodological part, in which we developed or reviewed technical aspects in molecular biology and parentage analysis; the second part is devoted to the application of molecular genetics to estimate population sizes and to understand mating systems. Noninvasive methods are gaining widespread use in genetic studies as they do not require the handling or disturbance of the study animal. However, DNA recovered from noninvasive samples, such as hairs or feces, is usually degraded and/or in small quantities, leading to genotyping errors and resulting in the identification of incorrect genotypes. This is a major concern, especially for small or endangered populations, as it can lead to biases in population size estimates. With the aim of increasing the quality and quantity of the desired DNA template, and to avoid the need for numerous replicates, we devised a two-step polymerase chain reaction (PCR) method. This “multiplex pre-amplification method” was tested on different species and compared with a conventional PCR approach. It significantly improved microsatellite amplification and decreased error rates for fecal DNA in limiting conditions. To more specifically amplify DNA from noninvasive samples of brown bears, we also redesigned microsatellite primers and one sex-specific primer and combined a semi-nested PCR with the multiplex pre-amplification method. These new approaches could be transposed to other species where conventional PCR methods experience low success due to limiting DNA concentration and/or quality. Genotyping errors remain a taboo subject in population genetics studies, in spite of their occurrence in most datasets and the negative consequences they may cause in the interpretation ... Doctoral or Postdoctoral Thesis Ursus arctos Université de Nantes: HAL-UNIV-NANTES |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
genetics population size estimates mate choice non invasive methods mating system genotyping errors parentage analysis Ursus arctos génétique conservation estimation de tailles de populations infanticide choix du partenaire méthodes non invasive système d'appariement erreurs de genotypage analyse de parenté [SDV.EE]Life Sciences [q-bio]/Ecology environment |
spellingShingle |
genetics population size estimates mate choice non invasive methods mating system genotyping errors parentage analysis Ursus arctos génétique conservation estimation de tailles de populations infanticide choix du partenaire méthodes non invasive système d'appariement erreurs de genotypage analyse de parenté [SDV.EE]Life Sciences [q-bio]/Ecology environment Bellemain, Eva "Genetics of the Scandinavian brown bear (Ursus arctos): implication for biology and conservation" |
topic_facet |
genetics population size estimates mate choice non invasive methods mating system genotyping errors parentage analysis Ursus arctos génétique conservation estimation de tailles de populations infanticide choix du partenaire méthodes non invasive système d'appariement erreurs de genotypage analyse de parenté [SDV.EE]Life Sciences [q-bio]/Ecology environment |
description |
This thesis deals with the application of molecular tools, combined with field data, in wildlife management, in conservation and in understanding species' biology and behavior. We used the brown bear (Ursus arctos) as a model species and the Scandinavian bear population as a case study. The first part of this thesis is a methodological part, in which we developed or reviewed technical aspects in molecular biology and parentage analysis; the second part is devoted to the application of molecular genetics to estimate population sizes and to understand mating systems. Noninvasive methods are gaining widespread use in genetic studies as they do not require the handling or disturbance of the study animal. However, DNA recovered from noninvasive samples, such as hairs or feces, is usually degraded and/or in small quantities, leading to genotyping errors and resulting in the identification of incorrect genotypes. This is a major concern, especially for small or endangered populations, as it can lead to biases in population size estimates. With the aim of increasing the quality and quantity of the desired DNA template, and to avoid the need for numerous replicates, we devised a two-step polymerase chain reaction (PCR) method. This “multiplex pre-amplification method” was tested on different species and compared with a conventional PCR approach. It significantly improved microsatellite amplification and decreased error rates for fecal DNA in limiting conditions. To more specifically amplify DNA from noninvasive samples of brown bears, we also redesigned microsatellite primers and one sex-specific primer and combined a semi-nested PCR with the multiplex pre-amplification method. These new approaches could be transposed to other species where conventional PCR methods experience low success due to limiting DNA concentration and/or quality. Genotyping errors remain a taboo subject in population genetics studies, in spite of their occurrence in most datasets and the negative consequences they may cause in the interpretation ... |
author2 |
Laboratoire d'Ecologie Alpine (LECA) Université Joseph Fourier - Grenoble 1 (UJF)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Université Joseph-Fourier - Grenoble I Dr Pierre Taberlet - Pr Jon Swenson (cotutelle)(pierre.taberlet@ujf-grenoble.fr - jon.swenson@umb.no) Scandinavian Brown Bear Research Project Norvège |
format |
Doctoral or Postdoctoral Thesis |
author |
Bellemain, Eva |
author_facet |
Bellemain, Eva |
author_sort |
Bellemain, Eva |
title |
"Genetics of the Scandinavian brown bear (Ursus arctos): implication for biology and conservation" |
title_short |
"Genetics of the Scandinavian brown bear (Ursus arctos): implication for biology and conservation" |
title_full |
"Genetics of the Scandinavian brown bear (Ursus arctos): implication for biology and conservation" |
title_fullStr |
"Genetics of the Scandinavian brown bear (Ursus arctos): implication for biology and conservation" |
title_full_unstemmed |
"Genetics of the Scandinavian brown bear (Ursus arctos): implication for biology and conservation" |
title_sort |
"genetics of the scandinavian brown bear (ursus arctos): implication for biology and conservation" |
publisher |
HAL CCSD |
publishDate |
2004 |
url |
https://theses.hal.science/tel-00122944 https://theses.hal.science/tel-00122944/document https://theses.hal.science/tel-00122944/file/These_Eva_Bellemain.pdf |
genre |
Ursus arctos |
genre_facet |
Ursus arctos |
op_source |
https://theses.hal.science/tel-00122944 Ecology, environment. Université Joseph-Fourier - Grenoble I, 2004. English. ⟨NNT : ⟩ |
op_relation |
tel-00122944 https://theses.hal.science/tel-00122944 https://theses.hal.science/tel-00122944/document https://theses.hal.science/tel-00122944/file/These_Eva_Bellemain.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766231458150612992 |