Einfluss von Temperatur auf die Energie-Budgetierung bei antarktischen und borealen Fischen
This thesis investigates how temperature and energy allocation affect the growth of fish species. In a comparative approach two eelpout species, one temperate, Zoarces viviparus, and one Antarctic eelpout, Pachycara brachycephalum, were studied. Age, growth and fecundity in the field were investigat...
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Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
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Universität Bremen
2006
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Online Access: | https://media.suub.uni-bremen.de/handle/elib/2222 https://nbn-resolving.org/urn:nbn:de:gbv:46-diss000103113 |
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ftsubbremen:oai:media.suub.uni-bremen.de:Publications/elib/2222 2023-05-15T13:42:30+02:00 Einfluss von Temperatur auf die Energie-Budgetierung bei antarktischen und borealen Fischen Influence of temperature on energy budgets in Antarctic and boreal fish Brodte, Eva Arntz, Wolf Pörtner, Hans-Otto 2006-02-09 application/pdf https://media.suub.uni-bremen.de/handle/elib/2222 https://nbn-resolving.org/urn:nbn:de:gbv:46-diss000103113 eng eng Universität Bremen FB2 Biologie/Chemie https://media.suub.uni-bremen.de/handle/elib/2222 urn:nbn:de:gbv:46-diss000103113 info:eu-repo/semantics/openAccess Antarctic fish biogeography CHN ecological eelpout fatty acids fecundity growth latitudinal lipid class lipid metabolism Pachycara brachycephalum respiration thermal limits temperature tolerance Wadden Sea Zoarces viviparus Zoarcidae 570 570 Life sciences biology ddc:570 Dissertation doctoralThesis 2006 ftsubbremen 2022-11-09T07:09:46Z This thesis investigates how temperature and energy allocation affect the growth of fish species. In a comparative approach two eelpout species, one temperate, Zoarces viviparus, and one Antarctic eelpout, Pachycara brachycephalum, were studied. Age, growth and fecundity in the field were investigated. The energy demands of metabolism, growth and excretion as well as body composition and lipids were measured and analysed at different temperatures in long-term acclimation experiments. In Pachycara brachycephalum the predominant lipid class in muscle and liver tissue over the whole temperature range are storage lipids. Zoarces viviparus changes the lipid composition to these storage lipids in the cold. The pronounced lipid metabolism in the Antarctic eelpout may be the result of evolutionary processes of high mitochondrial densities and low metabolic rates and the high availability of a lipid enriched diet indicated by the stable isotope analyses. The field growth patterns of Pachycara brachycephalum show in its natural habitat a lower growth rate than that of the temperate eelpout population in the Wadden Sea, whereas the experimental growth rate of the Antarctic eelpout was higher. Both the Antarctic and the temperate eelpout display optimum growth temperature close to their habitat temperature (12 degrees C for the temperate eelpout) or their evolutionary approach to the habitat (4 degrees C for the Antarctic eelpout, who most like entered Antarctic waters via Deep Sea). The food conversion efficiency of the Antarctic eelpout is high. This ability to ingest and absorb energy in short periods of local appearance and to store this energy for starving periods is crucial in an environment where food supply is unstable and pulsed. The slow field growth rates of the Antarctic eelpout are due to habitat temperatures below the thermal growth optimum and to food limitation. Doctoral or Postdoctoral Thesis Antarc* Antarctic Antarktis* Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) Antarctic The Antarctic |
institution |
Open Polar |
collection |
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) |
op_collection_id |
ftsubbremen |
language |
English |
topic |
Antarctic fish biogeography CHN ecological eelpout fatty acids fecundity growth latitudinal lipid class lipid metabolism Pachycara brachycephalum respiration thermal limits temperature tolerance Wadden Sea Zoarces viviparus Zoarcidae 570 570 Life sciences biology ddc:570 |
spellingShingle |
Antarctic fish biogeography CHN ecological eelpout fatty acids fecundity growth latitudinal lipid class lipid metabolism Pachycara brachycephalum respiration thermal limits temperature tolerance Wadden Sea Zoarces viviparus Zoarcidae 570 570 Life sciences biology ddc:570 Brodte, Eva Einfluss von Temperatur auf die Energie-Budgetierung bei antarktischen und borealen Fischen |
topic_facet |
Antarctic fish biogeography CHN ecological eelpout fatty acids fecundity growth latitudinal lipid class lipid metabolism Pachycara brachycephalum respiration thermal limits temperature tolerance Wadden Sea Zoarces viviparus Zoarcidae 570 570 Life sciences biology ddc:570 |
description |
This thesis investigates how temperature and energy allocation affect the growth of fish species. In a comparative approach two eelpout species, one temperate, Zoarces viviparus, and one Antarctic eelpout, Pachycara brachycephalum, were studied. Age, growth and fecundity in the field were investigated. The energy demands of metabolism, growth and excretion as well as body composition and lipids were measured and analysed at different temperatures in long-term acclimation experiments. In Pachycara brachycephalum the predominant lipid class in muscle and liver tissue over the whole temperature range are storage lipids. Zoarces viviparus changes the lipid composition to these storage lipids in the cold. The pronounced lipid metabolism in the Antarctic eelpout may be the result of evolutionary processes of high mitochondrial densities and low metabolic rates and the high availability of a lipid enriched diet indicated by the stable isotope analyses. The field growth patterns of Pachycara brachycephalum show in its natural habitat a lower growth rate than that of the temperate eelpout population in the Wadden Sea, whereas the experimental growth rate of the Antarctic eelpout was higher. Both the Antarctic and the temperate eelpout display optimum growth temperature close to their habitat temperature (12 degrees C for the temperate eelpout) or their evolutionary approach to the habitat (4 degrees C for the Antarctic eelpout, who most like entered Antarctic waters via Deep Sea). The food conversion efficiency of the Antarctic eelpout is high. This ability to ingest and absorb energy in short periods of local appearance and to store this energy for starving periods is crucial in an environment where food supply is unstable and pulsed. The slow field growth rates of the Antarctic eelpout are due to habitat temperatures below the thermal growth optimum and to food limitation. |
author2 |
Arntz, Wolf Pörtner, Hans-Otto |
format |
Doctoral or Postdoctoral Thesis |
author |
Brodte, Eva |
author_facet |
Brodte, Eva |
author_sort |
Brodte, Eva |
title |
Einfluss von Temperatur auf die Energie-Budgetierung bei antarktischen und borealen Fischen |
title_short |
Einfluss von Temperatur auf die Energie-Budgetierung bei antarktischen und borealen Fischen |
title_full |
Einfluss von Temperatur auf die Energie-Budgetierung bei antarktischen und borealen Fischen |
title_fullStr |
Einfluss von Temperatur auf die Energie-Budgetierung bei antarktischen und borealen Fischen |
title_full_unstemmed |
Einfluss von Temperatur auf die Energie-Budgetierung bei antarktischen und borealen Fischen |
title_sort |
einfluss von temperatur auf die energie-budgetierung bei antarktischen und borealen fischen |
publisher |
Universität Bremen |
publishDate |
2006 |
url |
https://media.suub.uni-bremen.de/handle/elib/2222 https://nbn-resolving.org/urn:nbn:de:gbv:46-diss000103113 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarktis* |
genre_facet |
Antarc* Antarctic Antarktis* |
op_relation |
https://media.suub.uni-bremen.de/handle/elib/2222 urn:nbn:de:gbv:46-diss000103113 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766168690876743680 |