Factors Affecting the Harvest Vulnerability of Trumpeter Swans
Two species of swan are regularly found in Utah, tundra swans (Cygnus columbianus) and trumpeter swans (Cygnus buccinator). Tundra swans migrate through Utah. During the fall migration period they are hunted in the state under guidelines established by the United States Fish and Wildlife Service (US...
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ftutahsudc:oai:digitalcommons.usu.edu:etd-7653 2023-08-27T04:09:07+02:00 Factors Affecting the Harvest Vulnerability of Trumpeter Swans Tangermann, Heidi L. 2002-05-01T07:00:00Z application/pdf https://digitalcommons.usu.edu/etd/6588 https://doi.org/10.26076/56dc-106e https://digitalcommons.usu.edu/context/etd/article/7653/viewcontent/2002_Tangermann_Heidi.pdf unknown DigitalCommons@USU https://digitalcommons.usu.edu/etd/6588 doi:10.26076/56dc-106e https://digitalcommons.usu.edu/context/etd/article/7653/viewcontent/2002_Tangermann_Heidi.pdf Copyright for this work is held by the author. Transmission or reproduction of materials protected by copyright beyond that allowed by fair use requires the written permission of the copyright owners. Works not in the public domain cannot be commercially exploited without permission of the copyright owner. Responsibility for any use rests exclusively with the user. For more information contact digitalcommons@usu.edu. All Graduate Theses and Dissertations harvestability trumpeter swans migration hunting education regulation Animal Sciences Environmental Sciences text 2002 ftutahsudc https://doi.org/10.26076/56dc-106e 2023-08-10T17:37:11Z Two species of swan are regularly found in Utah, tundra swans (Cygnus columbianus) and trumpeter swans (Cygnus buccinator). Tundra swans migrate through Utah. During the fall migration period they are hunted in the state under guidelines established by the United States Fish and Wildlife Service (USFWS). Trumpeter swans are occasional visitors to Utah during the same migration period. Because trumpeter swans are difficult to distinguish from tundra swans in flight, they 11 are at risk of being harvested during the swan hunt. In my thesis, I examine the factors that may influence trumpeter swan vulnerability to harvest. Specifically, I evaluated height and velocity of foraging flights for both species of swans and identified characteristics of Utah swan hunters. This information could assist the Utah Division of Wildlife Resources in developing an educational program to reduce trumpeter swan vulnerability. I applied flight dynamics theory to 86 trumpeter and 178 tundra swan measurements. Both speed and height of short-range foraging flights were used to predict trumpeter and tundra swan vulnerability. The theory predicted that trumpeter swans fly slower and lower than tundra swans, and thus may be more vulnerable to harvest. The predicted flight height of tundra swans was compared to observations of tundra swans made at the USFWS Bear River Migratory Bird Refuge. Average body area of the two species of swans was compared. Trumpeter swans had, on average, a 30% larger body area. Combining the lower predicted flight and larger body size, trumpeter swans may be up to 26% more vulnerable on a 3.8-km flight and 15% more vulnerable on a 10-km flight than tundra swans on the same flight path. In addition to current regulations, the Utah Division of Wildlife Resources is interested in implementing a swan hunter education course to further reduce the likelihood of a trumpeter swan being harvested during the swan hunt. I surveyed a representative sample of Utah swan hunters to determine if they would participate in the ... Text Cygnus columbianus Tundra Tundra Swan Utah State University: DigitalCommons@USU |
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Utah State University: DigitalCommons@USU |
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topic |
harvestability trumpeter swans migration hunting education regulation Animal Sciences Environmental Sciences |
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harvestability trumpeter swans migration hunting education regulation Animal Sciences Environmental Sciences Tangermann, Heidi L. Factors Affecting the Harvest Vulnerability of Trumpeter Swans |
topic_facet |
harvestability trumpeter swans migration hunting education regulation Animal Sciences Environmental Sciences |
description |
Two species of swan are regularly found in Utah, tundra swans (Cygnus columbianus) and trumpeter swans (Cygnus buccinator). Tundra swans migrate through Utah. During the fall migration period they are hunted in the state under guidelines established by the United States Fish and Wildlife Service (USFWS). Trumpeter swans are occasional visitors to Utah during the same migration period. Because trumpeter swans are difficult to distinguish from tundra swans in flight, they 11 are at risk of being harvested during the swan hunt. In my thesis, I examine the factors that may influence trumpeter swan vulnerability to harvest. Specifically, I evaluated height and velocity of foraging flights for both species of swans and identified characteristics of Utah swan hunters. This information could assist the Utah Division of Wildlife Resources in developing an educational program to reduce trumpeter swan vulnerability. I applied flight dynamics theory to 86 trumpeter and 178 tundra swan measurements. Both speed and height of short-range foraging flights were used to predict trumpeter and tundra swan vulnerability. The theory predicted that trumpeter swans fly slower and lower than tundra swans, and thus may be more vulnerable to harvest. The predicted flight height of tundra swans was compared to observations of tundra swans made at the USFWS Bear River Migratory Bird Refuge. Average body area of the two species of swans was compared. Trumpeter swans had, on average, a 30% larger body area. Combining the lower predicted flight and larger body size, trumpeter swans may be up to 26% more vulnerable on a 3.8-km flight and 15% more vulnerable on a 10-km flight than tundra swans on the same flight path. In addition to current regulations, the Utah Division of Wildlife Resources is interested in implementing a swan hunter education course to further reduce the likelihood of a trumpeter swan being harvested during the swan hunt. I surveyed a representative sample of Utah swan hunters to determine if they would participate in the ... |
format |
Text |
author |
Tangermann, Heidi L. |
author_facet |
Tangermann, Heidi L. |
author_sort |
Tangermann, Heidi L. |
title |
Factors Affecting the Harvest Vulnerability of Trumpeter Swans |
title_short |
Factors Affecting the Harvest Vulnerability of Trumpeter Swans |
title_full |
Factors Affecting the Harvest Vulnerability of Trumpeter Swans |
title_fullStr |
Factors Affecting the Harvest Vulnerability of Trumpeter Swans |
title_full_unstemmed |
Factors Affecting the Harvest Vulnerability of Trumpeter Swans |
title_sort |
factors affecting the harvest vulnerability of trumpeter swans |
publisher |
DigitalCommons@USU |
publishDate |
2002 |
url |
https://digitalcommons.usu.edu/etd/6588 https://doi.org/10.26076/56dc-106e https://digitalcommons.usu.edu/context/etd/article/7653/viewcontent/2002_Tangermann_Heidi.pdf |
genre |
Cygnus columbianus Tundra Tundra Swan |
genre_facet |
Cygnus columbianus Tundra Tundra Swan |
op_source |
All Graduate Theses and Dissertations |
op_relation |
https://digitalcommons.usu.edu/etd/6588 doi:10.26076/56dc-106e https://digitalcommons.usu.edu/context/etd/article/7653/viewcontent/2002_Tangermann_Heidi.pdf |
op_rights |
Copyright for this work is held by the author. Transmission or reproduction of materials protected by copyright beyond that allowed by fair use requires the written permission of the copyright owners. Works not in the public domain cannot be commercially exploited without permission of the copyright owner. Responsibility for any use rests exclusively with the user. For more information contact digitalcommons@usu.edu. |
op_doi |
https://doi.org/10.26076/56dc-106e |
_version_ |
1775350224060940288 |