The Evolution of Whales in Response To the Changing Circulation Patterns in Austral Seas
The Oligocene record for Cetacea is quite poor in comparison to the Eocene and the Miocene. However, the initial and rapid radiation Of the Odontoceti (toothed whales) and the Mysticeti (baleen whales) occurred in the Oligocene, and this is considered to be an important period in the evolution of th...
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University of Canterbury
2002
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ftunivcanter:oai:ir.canterbury.ac.nz:10092/14023 2023-05-15T15:37:08+02:00 The Evolution of Whales in Response To the Changing Circulation Patterns in Austral Seas Green, Vanessa 2002 application/pdf http://hdl.handle.net/10092/14023 English en eng University of Canterbury http://hdl.handle.net/10092/14023 All Rights Reserved Theses / Dissertations 2002 ftunivcanter 2022-09-08T13:38:16Z The Oligocene record for Cetacea is quite poor in comparison to the Eocene and the Miocene. However, the initial and rapid radiation Of the Odontoceti (toothed whales) and the Mysticeti (baleen whales) occurred in the Oligocene, and this is considered to be an important period in the evolution of these modern suborders. 2 Odontocetes and mysticetes developed very specialised cranial features related to feeding: mysticetes developed baleen plates to filter-feed plankton, and odontocetes developed the ability to echolocate to aid in hunting and navigation. The observation of the zoogeography of modern whales and their dependence on nutrient-rich upwell areas has led to the hypothesis that the evolution of whales in the Oligocene is a result of new, abundant food resources in upwelling areas resulting from changing ocean currents and shifting continents. The break-up of Gondwanaland and the formation of the cool Southern Ocean could be important factors relating to this. The Oligocene record for Cetacea is quite poor in comparison to the Eocene and the Miocene. However, the initial and rapid radiation Of the Odontoceti (toothed whales) and the Mysticeti (baleen whales) occurred in the Oligocene, and this is considered to be an important period in the evolution of these modern suborders. 2 Odontocetes and mysticetes developed very specialised cranial features related to feeding: mysticetes developed baleen plates to filter-feed plankton, and odontocetes developed the ability to echolocate to aid in hunting and navigation. The observation of the zoogeography of modern whales and their dependence on nutrient-rich upwell areas has led to the hypothesis that the evolution of whales in the Oligocene is a result of new, abundant food resources in upwelling areas resulting from changing ocean currents and shifting continents. The break-up of Gondwanaland and the formation of the cool Southern Ocean could be important factors relating to this. Other/Unknown Material baleen whales Southern Ocean toothed whales University of Canterbury, Christchurch: UC Research Repository Austral Southern Ocean |
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Open Polar |
collection |
University of Canterbury, Christchurch: UC Research Repository |
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ftunivcanter |
language |
English |
description |
The Oligocene record for Cetacea is quite poor in comparison to the Eocene and the Miocene. However, the initial and rapid radiation Of the Odontoceti (toothed whales) and the Mysticeti (baleen whales) occurred in the Oligocene, and this is considered to be an important period in the evolution of these modern suborders. 2 Odontocetes and mysticetes developed very specialised cranial features related to feeding: mysticetes developed baleen plates to filter-feed plankton, and odontocetes developed the ability to echolocate to aid in hunting and navigation. The observation of the zoogeography of modern whales and their dependence on nutrient-rich upwell areas has led to the hypothesis that the evolution of whales in the Oligocene is a result of new, abundant food resources in upwelling areas resulting from changing ocean currents and shifting continents. The break-up of Gondwanaland and the formation of the cool Southern Ocean could be important factors relating to this. The Oligocene record for Cetacea is quite poor in comparison to the Eocene and the Miocene. However, the initial and rapid radiation Of the Odontoceti (toothed whales) and the Mysticeti (baleen whales) occurred in the Oligocene, and this is considered to be an important period in the evolution of these modern suborders. 2 Odontocetes and mysticetes developed very specialised cranial features related to feeding: mysticetes developed baleen plates to filter-feed plankton, and odontocetes developed the ability to echolocate to aid in hunting and navigation. The observation of the zoogeography of modern whales and their dependence on nutrient-rich upwell areas has led to the hypothesis that the evolution of whales in the Oligocene is a result of new, abundant food resources in upwelling areas resulting from changing ocean currents and shifting continents. The break-up of Gondwanaland and the formation of the cool Southern Ocean could be important factors relating to this. |
format |
Other/Unknown Material |
author |
Green, Vanessa |
spellingShingle |
Green, Vanessa The Evolution of Whales in Response To the Changing Circulation Patterns in Austral Seas |
author_facet |
Green, Vanessa |
author_sort |
Green, Vanessa |
title |
The Evolution of Whales in Response To the Changing Circulation Patterns in Austral Seas |
title_short |
The Evolution of Whales in Response To the Changing Circulation Patterns in Austral Seas |
title_full |
The Evolution of Whales in Response To the Changing Circulation Patterns in Austral Seas |
title_fullStr |
The Evolution of Whales in Response To the Changing Circulation Patterns in Austral Seas |
title_full_unstemmed |
The Evolution of Whales in Response To the Changing Circulation Patterns in Austral Seas |
title_sort |
evolution of whales in response to the changing circulation patterns in austral seas |
publisher |
University of Canterbury |
publishDate |
2002 |
url |
http://hdl.handle.net/10092/14023 |
geographic |
Austral Southern Ocean |
geographic_facet |
Austral Southern Ocean |
genre |
baleen whales Southern Ocean toothed whales |
genre_facet |
baleen whales Southern Ocean toothed whales |
op_relation |
http://hdl.handle.net/10092/14023 |
op_rights |
All Rights Reserved |
_version_ |
1766367588408885248 |