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Evaluating Resource Tracking and the Benefit of Migration for a Temperate Ungulate.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Evaluating Resource Tracking and the Benefit of Migration for a Temperate Ungulate./
作者:	Ortega, Anna C.
面頁冊數:	1 online resource (185 pages)
附註:	Source: Dissertations Abstracts International, Volume: 84-11, Section: B.
Contained By:	Dissertations Abstracts International84-11B.
標題:	Ecology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30487454click for full text (PQDT)
ISBN:	9798379562311

Evaluating Resource Tracking and the Benefit of Migration for a Temperate Ungulate.
Ortega, Anna C.

Evaluating Resource Tracking and the Benefit of Migration for a Temperate Ungulate. - 1 online resource (185 pages)

Source: Dissertations Abstracts International, Volume: 84-11, Section: B.

Thesis (Ph.D.)--University of Wyoming, 2023.

Includes bibliographical references

Ungulates make some of the longest terrestrial migrations in the world, including the 1500-km migration of caribou (Rangifer tarandus) across the Arctic tundra. Over the last century, ecologists have theorized that ungulates migrate to escape snow, acquire forage, avoid predation or ease competition for limited food. For example, growing evidence suggests that temperate ungulates acquire high-quality forage by pacing their spring migrations with the flush of green-up across the landscape, known as "green-wave surfing." Although migration is a common behavior among ungulates, the fitness benefits that have allowed migration to evolve and be maintained remain elusive. Herein, I studied a partially migratory population of mule deer (Odocoileus hemionus) in western Wyoming, USA to identify the fitness benefits of migration. Specifically, I evaluated (1) how deer fine-tune their spring migrations to track green-up, (2) if deer optimize high-quality forage as available plants grow and senesce on summer range, (3) how deer pace their autumn migration to minimize exposure to snow but maximize acquisition of residual forage, and (4) whether better foraging opportunities translate into fitness benefits for deer that migrate long distances. By combining 9 years of detailed movement data with seasonal estimates of fat, survival and reproduction, I found that by migrating out of a desert ecosystem each spring, deer can acquire superior foraging opportunities and replenish enough fat reserves to sustain population growth. My dissertation highlights the importance of identifying and conserving migration corridors so that ungulates can freely move between habitat and maximize the fitness benefits of migration.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798379562311Subjects--Topical Terms:

516476
Ecology.
Subjects--Index Terms:

Fitness benefitsIndex Terms--Genre/Form:

542853
Electronic books.

Evaluating Resource Tracking and the Benefit of Migration for a Temperate Ungulate.
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