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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fttriple:oai:gotriple.eu:10670/1.yvb0t5 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 La Rochelle Simon-Bouhet, Benoit Guinet, Christophe 2014-07-15 http://www.theses.fr/2014LAROS015/document en eng 10670/1.yvb0t5 http://www.theses.fr/2014LAROS015/document other Theses.fr Génétique des populations Écologie Structure sociale Histoire démographique Grands dauphins Population genetics Ecology Social structure Demographic history Bottlenose dolphins envir geo Thesis https://vocabularies.coar-repositories.org/resource_types/c_46ec/ 2014 fttriple 2023-01-22T16:45:20Z 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 ... Thesis North East Atlantic Unknown Dauphins ENVELOPE(141.589,141.589,-66.771,-66.771) |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
Génétique des populations Écologie Structure sociale Histoire démographique Grands dauphins Population genetics Ecology Social structure Demographic history Bottlenose dolphins envir geo |
spellingShingle |
Génétique des populations Écologie Structure sociale Histoire démographique Grands dauphins Population genetics Ecology Social structure Demographic history Bottlenose dolphins envir geo 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 |
Génétique des populations Écologie Structure sociale Histoire démographique Grands dauphins Population genetics Ecology Social structure Demographic history Bottlenose dolphins envir geo |
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 |
La Rochelle Simon-Bouhet, Benoit Guinet, Christophe |
format |
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 |
publishDate |
2014 |
url |
http://www.theses.fr/2014LAROS015/document |
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 |
Theses.fr |
op_relation |
10670/1.yvb0t5 http://www.theses.fr/2014LAROS015/document |
op_rights |
other |
_version_ |
1766138853858476032 |