Social, ecological and genetic structures of bottlenose dolphins, Tursiops truncatus, in the Normano-Breton gulf and in the North-East Atlantic
Complex interactions between environmental factors and behavioral traits may shape the fine and large scale structuring patterns of animal species. The objectives of this dissertation were to describe and understand i) the fine-scale social, ecological and genetic structures of bottlenose dolphins i...
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ftunivnantes:oai:HAL:tel-01318987v2 2023-05-15T17:38:25+02:00 Social, ecological and genetic structures of bottlenose dolphins, Tursiops truncatus, in the Normano-Breton gulf and in the North-East Atlantic Structures sociale, écologique et génétique du grand dauphin, Tursiops truncatus, dans le golfe Normand-Breton et dans l'Atlantique Nord-Est Louis, Marie LIttoral ENvironnement et Sociétés (LIENSs) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) Institut National de la Recherche Agronomique (INRA)-La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Université de La Rochelle Benoit Simon-Bouhet Christophe Guinet 2014-07-15 https://hal.science/tel-01318987 https://hal.science/tel-01318987v2/document https://hal.science/tel-01318987v2/file/2014Louis58179.pdf en eng HAL CCSD NNT: 2014LAROS015 tel-01318987 https://hal.science/tel-01318987 https://hal.science/tel-01318987v2/document https://hal.science/tel-01318987v2/file/2014Louis58179.pdf info:eu-repo/semantics/OpenAccess https://hal.science/tel-01318987 Agricultural sciences. Université de La Rochelle, 2014. English. ⟨NNT : 2014LAROS015⟩ Population genetics Ecology Social structure Demographic history Bottlenose dolphins Génétique des populations Écologie Structure sociale Histoire démographique Grands dauphins [SDV.SA]Life Sciences [q-bio]/Agricultural sciences info:eu-repo/semantics/doctoralThesis Theses 2014 ftunivnantes 2023-03-08T07:03:35Z Complex interactions between environmental factors and behavioral traits may shape the fine and large scale structuring patterns of animal species. The objectives of this dissertation were to describe and understand i) the fine-scale social, ecological and genetic structures of bottlenose dolphins in the Normano-Breton (NB) gulf and ii) the population structure of the species at the scale of the North-East Atlantic (NEA) by combining social, genetic, stable isotope and morphometric approaches. Coastal bottlenose dolphins in the NB gulf form a single genetic population subdivided in three social and ecological clusters. Ecology but not kinship may influence association patterns. In the NEA, bottlenose dolphin genetic structure is hierarchical. They form two ecotypes, i.e. coastal and pelagic, each of them being further divided in two populations. This genetic structure was likely triggered by past changes in the environment (i.e. deglaciation) that created ecological opportunities for diversification. Ecological specializations and social behavior may maintain genetic divergence. In turn, the pelagic origin of bottlenose dolphins in the NB gulf may explain some of their social structure traits. Thus, an interaction between social and ecological behaviors, current and past environmental conditions, and evolutionary history may drive the fine and large scale structuring patterns of this top predator. The absence of strong differences in morphology between the two ecotypes may be explained by their relatively recent divergence or by low contrasts between the pelagic and coastal habitats in the NEA. This work highlights the power of combining approaches at different temporal and spatial scales for assessing the social and population structures of highly mobile and difficult to access species. The results have also major conservation implications especially for the designation of management units. Les patrons de structuration des espèces animales à fine et à large échelles peuvent être façonnés par des facteurs ... Doctoral or Postdoctoral Thesis North East Atlantic Université de Nantes: HAL-UNIV-NANTES Dauphins ENVELOPE(141.589,141.589,-66.771,-66.771) |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Population genetics Ecology Social structure Demographic history Bottlenose dolphins Génétique des populations Écologie Structure sociale Histoire démographique Grands dauphins [SDV.SA]Life Sciences [q-bio]/Agricultural sciences |
spellingShingle |
Population genetics Ecology Social structure Demographic history Bottlenose dolphins Génétique des populations Écologie Structure sociale Histoire démographique Grands dauphins [SDV.SA]Life Sciences [q-bio]/Agricultural sciences Louis, Marie Social, ecological and genetic structures of bottlenose dolphins, Tursiops truncatus, in the Normano-Breton gulf and in the North-East Atlantic |
topic_facet |
Population genetics Ecology Social structure Demographic history Bottlenose dolphins Génétique des populations Écologie Structure sociale Histoire démographique Grands dauphins [SDV.SA]Life Sciences [q-bio]/Agricultural sciences |
description |
Complex interactions between environmental factors and behavioral traits may shape the fine and large scale structuring patterns of animal species. The objectives of this dissertation were to describe and understand i) the fine-scale social, ecological and genetic structures of bottlenose dolphins in the Normano-Breton (NB) gulf and ii) the population structure of the species at the scale of the North-East Atlantic (NEA) by combining social, genetic, stable isotope and morphometric approaches. Coastal bottlenose dolphins in the NB gulf form a single genetic population subdivided in three social and ecological clusters. Ecology but not kinship may influence association patterns. In the NEA, bottlenose dolphin genetic structure is hierarchical. They form two ecotypes, i.e. coastal and pelagic, each of them being further divided in two populations. This genetic structure was likely triggered by past changes in the environment (i.e. deglaciation) that created ecological opportunities for diversification. Ecological specializations and social behavior may maintain genetic divergence. In turn, the pelagic origin of bottlenose dolphins in the NB gulf may explain some of their social structure traits. Thus, an interaction between social and ecological behaviors, current and past environmental conditions, and evolutionary history may drive the fine and large scale structuring patterns of this top predator. The absence of strong differences in morphology between the two ecotypes may be explained by their relatively recent divergence or by low contrasts between the pelagic and coastal habitats in the NEA. This work highlights the power of combining approaches at different temporal and spatial scales for assessing the social and population structures of highly mobile and difficult to access species. The results have also major conservation implications especially for the designation of management units. Les patrons de structuration des espèces animales à fine et à large échelles peuvent être façonnés par des facteurs ... |
author2 |
LIttoral ENvironnement et Sociétés (LIENSs) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) Institut National de la Recherche Agronomique (INRA)-La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Université de La Rochelle Benoit Simon-Bouhet Christophe Guinet |
format |
Doctoral or Postdoctoral Thesis |
author |
Louis, Marie |
author_facet |
Louis, Marie |
author_sort |
Louis, Marie |
title |
Social, ecological and genetic structures of bottlenose dolphins, Tursiops truncatus, in the Normano-Breton gulf and in the North-East Atlantic |
title_short |
Social, ecological and genetic structures of bottlenose dolphins, Tursiops truncatus, in the Normano-Breton gulf and in the North-East Atlantic |
title_full |
Social, ecological and genetic structures of bottlenose dolphins, Tursiops truncatus, in the Normano-Breton gulf and in the North-East Atlantic |
title_fullStr |
Social, ecological and genetic structures of bottlenose dolphins, Tursiops truncatus, in the Normano-Breton gulf and in the North-East Atlantic |
title_full_unstemmed |
Social, ecological and genetic structures of bottlenose dolphins, Tursiops truncatus, in the Normano-Breton gulf and in the North-East Atlantic |
title_sort |
social, ecological and genetic structures of bottlenose dolphins, tursiops truncatus, in the normano-breton gulf and in the north-east atlantic |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://hal.science/tel-01318987 https://hal.science/tel-01318987v2/document https://hal.science/tel-01318987v2/file/2014Louis58179.pdf |
long_lat |
ENVELOPE(141.589,141.589,-66.771,-66.771) |
geographic |
Dauphins |
geographic_facet |
Dauphins |
genre |
North East Atlantic |
genre_facet |
North East Atlantic |
op_source |
https://hal.science/tel-01318987 Agricultural sciences. Université de La Rochelle, 2014. English. ⟨NNT : 2014LAROS015⟩ |
op_relation |
NNT: 2014LAROS015 tel-01318987 https://hal.science/tel-01318987 https://hal.science/tel-01318987v2/document https://hal.science/tel-01318987v2/file/2014Louis58179.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766138846520541184 |