Could whales have maintained a high abundance of krill? Evol Ecol Res 9: 651–662
Question: Several million large whales were killed between 1900 and 1970. All these whales preyed on krill (Euphausia superba). Why has krill population abundance declined after the elimination of their primary predator? Hypothesis: Krill have changed their behaviour due to the absence of whales and...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.578.8700 2023-05-15T16:08:28+02:00 Could whales have maintained a high abundance of krill? Evol Ecol Res 9: 651–662 Jay Willis The Pennsylvania State University CiteSeerX Archives 2007 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.578.8700 http://www.iwcoffice.co.uk/_documents/sci_com/SC59docs/SC-59-ForInformation41.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.578.8700 http://www.iwcoffice.co.uk/_documents/sci_com/SC59docs/SC-59-ForInformation41.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.iwcoffice.co.uk/_documents/sci_com/SC59docs/SC-59-ForInformation41.pdf computer model IBM regime change text 2007 ftciteseerx 2016-01-08T12:53:17Z Question: Several million large whales were killed between 1900 and 1970. All these whales preyed on krill (Euphausia superba). Why has krill population abundance declined after the elimination of their primary predator? Hypothesis: Krill have changed their behaviour due to the absence of whales and this change in behaviour has resulted in a decrease in krill abundance. Methods: I reproduced a computer model of krill life history. I then extended the model as an individual-based model to show the effects of habitat choice on individual lifetime reproductive success and abundance. Conclusions: In the context of our current understanding of krill physiology, predator-invoked behaviour may lead to increased population abundance and, without the predator, natural selection may favour behaviour that would lead to lower abundance. This reverses the predictions of mass balance ecosystem models. Text Euphausia superba Unknown |
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computer model IBM regime change |
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computer model IBM regime change Jay Willis Could whales have maintained a high abundance of krill? Evol Ecol Res 9: 651–662 |
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computer model IBM regime change |
description |
Question: Several million large whales were killed between 1900 and 1970. All these whales preyed on krill (Euphausia superba). Why has krill population abundance declined after the elimination of their primary predator? Hypothesis: Krill have changed their behaviour due to the absence of whales and this change in behaviour has resulted in a decrease in krill abundance. Methods: I reproduced a computer model of krill life history. I then extended the model as an individual-based model to show the effects of habitat choice on individual lifetime reproductive success and abundance. Conclusions: In the context of our current understanding of krill physiology, predator-invoked behaviour may lead to increased population abundance and, without the predator, natural selection may favour behaviour that would lead to lower abundance. This reverses the predictions of mass balance ecosystem models. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Jay Willis |
author_facet |
Jay Willis |
author_sort |
Jay Willis |
title |
Could whales have maintained a high abundance of krill? Evol Ecol Res 9: 651–662 |
title_short |
Could whales have maintained a high abundance of krill? Evol Ecol Res 9: 651–662 |
title_full |
Could whales have maintained a high abundance of krill? Evol Ecol Res 9: 651–662 |
title_fullStr |
Could whales have maintained a high abundance of krill? Evol Ecol Res 9: 651–662 |
title_full_unstemmed |
Could whales have maintained a high abundance of krill? Evol Ecol Res 9: 651–662 |
title_sort |
could whales have maintained a high abundance of krill? evol ecol res 9: 651–662 |
publishDate |
2007 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.578.8700 http://www.iwcoffice.co.uk/_documents/sci_com/SC59docs/SC-59-ForInformation41.pdf |
genre |
Euphausia superba |
genre_facet |
Euphausia superba |
op_source |
http://www.iwcoffice.co.uk/_documents/sci_com/SC59docs/SC-59-ForInformation41.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.578.8700 http://www.iwcoffice.co.uk/_documents/sci_com/SC59docs/SC-59-ForInformation41.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766404514139602944 |