The effects of predicted climate change conditions on tropical sharks
Myriad anthropogenic impacts drive declines in global shark populations; yet, the consequences of a newly recognised threat, global climate change, are poorly understood. This thesis tested the hypothesis that global change stressors (ocean acidification and warming) reduce fitness in tropical reef...
Main Author: | |
---|---|
Other Authors: | , , , , , , |
Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
Published: |
HAL CCSD
2020
|
Subjects: | |
Online Access: | https://theses.hal.science/tel-02889401 https://theses.hal.science/tel-02889401/document https://theses.hal.science/tel-02889401/file/2020UPSLP009_archivage.pdf |
id |
ftunivperpignan:oai:HAL:tel-02889401v1 |
---|---|
record_format |
openpolar |
spelling |
ftunivperpignan:oai:HAL:tel-02889401v1 2024-05-19T07:46:31+00:00 The effects of predicted climate change conditions on tropical sharks Les effets des conditions du changement climatique prévues sur les requins tropicaux Bouyoucos, Ian Centre de recherches insulaires et observatoire de l'environnement (CRIOBE) Université de Perpignan Via Domitia (UPVD)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) Université Paris sciences et lettres James Cook university of North Queensland Serge Planes Jodie Rummer 2020-02-12 https://theses.hal.science/tel-02889401 https://theses.hal.science/tel-02889401/document https://theses.hal.science/tel-02889401/file/2020UPSLP009_archivage.pdf en eng HAL CCSD NNT: 2020UPSLP009 tel-02889401 https://theses.hal.science/tel-02889401 https://theses.hal.science/tel-02889401/document https://theses.hal.science/tel-02889401/file/2020UPSLP009_archivage.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-02889401 Global Changes. Université Paris sciences et lettres; James Cook university of North Queensland, 2020. English. ⟨NNT : 2020UPSLP009⟩ Reef shark Shark nursery area Conservation physiology Thermal performance Ocean acidification Ecophysiology Physiologie de la conservation Performance thermique Requin du récif Zone « nurserie » de requin [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/doctoralThesis Theses 2020 ftunivperpignan 2024-04-25T00:00:11Z Myriad anthropogenic impacts drive declines in global shark populations; yet, the consequences of a newly recognised threat, global climate change, are poorly understood. This thesis tested the hypothesis that global change stressors (ocean acidification and warming) reduce fitness in tropical reef sharks via effects on physiological performance. My specific objectives were to define thermal performance in fitness-enhancing nursery areas, physiological performance in situ, associations between thermal performance, preference, and tolerance, and physiological performance under multiple global change stressors. I found that neonatal blacktip reef sharks (Carcharhinus melanopterus) have superior growth efficiency in nursery areas relative to other habitats, but ocean acidification and warming synergistically reduce performance. This thesis suggests that global change stressors reduce fitness in tropical reef sharks by acting on physiological traits that are associated with nursery areas. Les requins sont menacés aux causes anthropiques mais, les conséquences qu’une menace nouveau, le changement climatique, sont mal connus. Pour ma thèse, j’ai testé l’hypothèse que le changement climatique agira sur les performances physiologiques des requins tropicaux pour réduire la valeur sélective. Mes objectives sont d’évaluer les effets des zones « nurseries » sur la performance physiologique, la performance physiologique in situ, les performances, préférences, et tolérances thermiques, et les effets du réchauffement et de l’acidification des océans sur la performance physiologique. J’ai trouvé que les requins pointes noires (Carcharhinus melanopterus) ont la croissance supérieure dans les zones nurseries mais l’acidification et le réchauffement agissent en synergie à la réduire. Mes résultats suggèrent que le changement climatique va réduire la valeur sélective des requins tropicaux par les effets sur les performances physiologiques qui sont associés aux zones nurseries. Doctoral or Postdoctoral Thesis Ocean acidification Université de Perpignan: HAL |
institution |
Open Polar |
collection |
Université de Perpignan: HAL |
op_collection_id |
ftunivperpignan |
language |
English |
topic |
Reef shark Shark nursery area Conservation physiology Thermal performance Ocean acidification Ecophysiology Physiologie de la conservation Performance thermique Requin du récif Zone « nurserie » de requin [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
Reef shark Shark nursery area Conservation physiology Thermal performance Ocean acidification Ecophysiology Physiologie de la conservation Performance thermique Requin du récif Zone « nurserie » de requin [SDE.MCG]Environmental Sciences/Global Changes Bouyoucos, Ian The effects of predicted climate change conditions on tropical sharks |
topic_facet |
Reef shark Shark nursery area Conservation physiology Thermal performance Ocean acidification Ecophysiology Physiologie de la conservation Performance thermique Requin du récif Zone « nurserie » de requin [SDE.MCG]Environmental Sciences/Global Changes |
description |
Myriad anthropogenic impacts drive declines in global shark populations; yet, the consequences of a newly recognised threat, global climate change, are poorly understood. This thesis tested the hypothesis that global change stressors (ocean acidification and warming) reduce fitness in tropical reef sharks via effects on physiological performance. My specific objectives were to define thermal performance in fitness-enhancing nursery areas, physiological performance in situ, associations between thermal performance, preference, and tolerance, and physiological performance under multiple global change stressors. I found that neonatal blacktip reef sharks (Carcharhinus melanopterus) have superior growth efficiency in nursery areas relative to other habitats, but ocean acidification and warming synergistically reduce performance. This thesis suggests that global change stressors reduce fitness in tropical reef sharks by acting on physiological traits that are associated with nursery areas. Les requins sont menacés aux causes anthropiques mais, les conséquences qu’une menace nouveau, le changement climatique, sont mal connus. Pour ma thèse, j’ai testé l’hypothèse que le changement climatique agira sur les performances physiologiques des requins tropicaux pour réduire la valeur sélective. Mes objectives sont d’évaluer les effets des zones « nurseries » sur la performance physiologique, la performance physiologique in situ, les performances, préférences, et tolérances thermiques, et les effets du réchauffement et de l’acidification des océans sur la performance physiologique. J’ai trouvé que les requins pointes noires (Carcharhinus melanopterus) ont la croissance supérieure dans les zones nurseries mais l’acidification et le réchauffement agissent en synergie à la réduire. Mes résultats suggèrent que le changement climatique va réduire la valeur sélective des requins tropicaux par les effets sur les performances physiologiques qui sont associés aux zones nurseries. |
author2 |
Centre de recherches insulaires et observatoire de l'environnement (CRIOBE) Université de Perpignan Via Domitia (UPVD)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) Université Paris sciences et lettres James Cook university of North Queensland Serge Planes Jodie Rummer |
format |
Doctoral or Postdoctoral Thesis |
author |
Bouyoucos, Ian |
author_facet |
Bouyoucos, Ian |
author_sort |
Bouyoucos, Ian |
title |
The effects of predicted climate change conditions on tropical sharks |
title_short |
The effects of predicted climate change conditions on tropical sharks |
title_full |
The effects of predicted climate change conditions on tropical sharks |
title_fullStr |
The effects of predicted climate change conditions on tropical sharks |
title_full_unstemmed |
The effects of predicted climate change conditions on tropical sharks |
title_sort |
effects of predicted climate change conditions on tropical sharks |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://theses.hal.science/tel-02889401 https://theses.hal.science/tel-02889401/document https://theses.hal.science/tel-02889401/file/2020UPSLP009_archivage.pdf |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
https://theses.hal.science/tel-02889401 Global Changes. Université Paris sciences et lettres; James Cook university of North Queensland, 2020. English. ⟨NNT : 2020UPSLP009⟩ |
op_relation |
NNT: 2020UPSLP009 tel-02889401 https://theses.hal.science/tel-02889401 https://theses.hal.science/tel-02889401/document https://theses.hal.science/tel-02889401/file/2020UPSLP009_archivage.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1799486723455975424 |