Characterization and modeling of the vertical physical and biological habitat of deep-diving mammals
Deep-diving mammals evolve within a tri-dimensional environment where the physical and biological conditions vary. These variations can influence their utilization of the vertical dimension. This Ph.D. thesis focuses, first, on acoustic signal analysis, the signal being sampled by a miniaturized ech...
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Online Access: | https://theses.hal.science/tel-03962421 https://theses.hal.science/tel-03962421/document https://theses.hal.science/tel-03962421/file/2022TOURNIER192188.pdf |
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ftccsdartic:oai:HAL:tel-03962421v1 2024-02-27T08:40:11+00:00 Characterization and modeling of the vertical physical and biological habitat of deep-diving mammals Caractérisation et modélisation de l’habitat physique et biologique vertical des mammifères marins grands plongeurs Tournier, Martin Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Université de La Rochelle Christophe Guinet Mark Peter Johnson 2022-03-30 https://theses.hal.science/tel-03962421 https://theses.hal.science/tel-03962421/document https://theses.hal.science/tel-03962421/file/2022TOURNIER192188.pdf fr fre HAL CCSD NNT: 2022LAROS018 tel-03962421 https://theses.hal.science/tel-03962421 https://theses.hal.science/tel-03962421/document https://theses.hal.science/tel-03962421/file/2022TOURNIER192188.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-03962421 Biologie animale. Université de La Rochelle, 2022. Français. ⟨NNT : 2022LAROS018⟩ Active acoustic Sonar Functional data analysis Biologging Mirounga leonina Mesoplodon densirostris Acoustique active Analyses de données fonctionnelles Bio-logging [SDV.BA]Life Sciences [q-bio]/Animal biology [SDV.SA]Life Sciences [q-bio]/Agricultural sciences info:eu-repo/semantics/doctoralThesis Theses 2022 ftccsdartic 2024-01-28T00:57:37Z Deep-diving mammals evolve within a tri-dimensional environment where the physical and biological conditions vary. These variations can influence their utilization of the vertical dimension. This Ph.D. thesis focuses, first, on acoustic signal analysis, the signal being sampled by a miniaturized echo-sounder deployed on southern elephant seals, and aims at biologically describing the water column. Through that acoustic signal, mid-trophic level organisms have been observed, as well as important particle export. Second, to determine the influence of dynamic environmental variables, such as temperature or salinity, on the vertical position of elephant seals and Blainville’s beaked whales, we proposed a new methodology suitable for using environmental predictors described in the form of profiles by using functional analysis approaches. When using the variables obtained in situ by elephant seals, we show that the environmental profiles influence the depth of the dives. However, the model tends to underestimate the predicted depth of animals, mainly in areas where high oceanic dynamics are observed. When using the same approach on the restricted beaked whales’ dataset, and by using environmental variables obtained from oceanographic models, we did not observe any impact of the environmental conditions on the whales’ water column use. This methodological approach could allow the integration of the vertical dimension toward the development of tri-dimensional habitat modelling under the conditions that the spatial and temporal resolutions of the dataset are adequate. Les mammifères marins grands plongeurs évoluent dans un environnement tridimensionnel dans lequel les conditions physiques et biologiques varient. Les variations de ces conditions peuvent influencer leur utilisation de la dimension verticale. Les travaux de cette thèse s’appuient dans un premier temps sur le traitement du signal acoustique échantillonné par un échosondeur miniaturisé déployé sur des éléphants de mer austraux, pour apporter une ... Doctoral or Postdoctoral Thesis Elephant Seals Mirounga leonina Southern Elephant Seals Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
French |
topic |
Active acoustic Sonar Functional data analysis Biologging Mirounga leonina Mesoplodon densirostris Acoustique active Analyses de données fonctionnelles Bio-logging [SDV.BA]Life Sciences [q-bio]/Animal biology [SDV.SA]Life Sciences [q-bio]/Agricultural sciences |
spellingShingle |
Active acoustic Sonar Functional data analysis Biologging Mirounga leonina Mesoplodon densirostris Acoustique active Analyses de données fonctionnelles Bio-logging [SDV.BA]Life Sciences [q-bio]/Animal biology [SDV.SA]Life Sciences [q-bio]/Agricultural sciences Tournier, Martin Characterization and modeling of the vertical physical and biological habitat of deep-diving mammals |
topic_facet |
Active acoustic Sonar Functional data analysis Biologging Mirounga leonina Mesoplodon densirostris Acoustique active Analyses de données fonctionnelles Bio-logging [SDV.BA]Life Sciences [q-bio]/Animal biology [SDV.SA]Life Sciences [q-bio]/Agricultural sciences |
description |
Deep-diving mammals evolve within a tri-dimensional environment where the physical and biological conditions vary. These variations can influence their utilization of the vertical dimension. This Ph.D. thesis focuses, first, on acoustic signal analysis, the signal being sampled by a miniaturized echo-sounder deployed on southern elephant seals, and aims at biologically describing the water column. Through that acoustic signal, mid-trophic level organisms have been observed, as well as important particle export. Second, to determine the influence of dynamic environmental variables, such as temperature or salinity, on the vertical position of elephant seals and Blainville’s beaked whales, we proposed a new methodology suitable for using environmental predictors described in the form of profiles by using functional analysis approaches. When using the variables obtained in situ by elephant seals, we show that the environmental profiles influence the depth of the dives. However, the model tends to underestimate the predicted depth of animals, mainly in areas where high oceanic dynamics are observed. When using the same approach on the restricted beaked whales’ dataset, and by using environmental variables obtained from oceanographic models, we did not observe any impact of the environmental conditions on the whales’ water column use. This methodological approach could allow the integration of the vertical dimension toward the development of tri-dimensional habitat modelling under the conditions that the spatial and temporal resolutions of the dataset are adequate. Les mammifères marins grands plongeurs évoluent dans un environnement tridimensionnel dans lequel les conditions physiques et biologiques varient. Les variations de ces conditions peuvent influencer leur utilisation de la dimension verticale. Les travaux de cette thèse s’appuient dans un premier temps sur le traitement du signal acoustique échantillonné par un échosondeur miniaturisé déployé sur des éléphants de mer austraux, pour apporter une ... |
author2 |
Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Université de La Rochelle Christophe Guinet Mark Peter Johnson |
format |
Doctoral or Postdoctoral Thesis |
author |
Tournier, Martin |
author_facet |
Tournier, Martin |
author_sort |
Tournier, Martin |
title |
Characterization and modeling of the vertical physical and biological habitat of deep-diving mammals |
title_short |
Characterization and modeling of the vertical physical and biological habitat of deep-diving mammals |
title_full |
Characterization and modeling of the vertical physical and biological habitat of deep-diving mammals |
title_fullStr |
Characterization and modeling of the vertical physical and biological habitat of deep-diving mammals |
title_full_unstemmed |
Characterization and modeling of the vertical physical and biological habitat of deep-diving mammals |
title_sort |
characterization and modeling of the vertical physical and biological habitat of deep-diving mammals |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://theses.hal.science/tel-03962421 https://theses.hal.science/tel-03962421/document https://theses.hal.science/tel-03962421/file/2022TOURNIER192188.pdf |
genre |
Elephant Seals Mirounga leonina Southern Elephant Seals |
genre_facet |
Elephant Seals Mirounga leonina Southern Elephant Seals |
op_source |
https://theses.hal.science/tel-03962421 Biologie animale. Université de La Rochelle, 2022. Français. ⟨NNT : 2022LAROS018⟩ |
op_relation |
NNT: 2022LAROS018 tel-03962421 https://theses.hal.science/tel-03962421 https://theses.hal.science/tel-03962421/document https://theses.hal.science/tel-03962421/file/2022TOURNIER192188.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1792047286346317824 |