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A Comprehensive Study of Predator Diets in Lake Huron.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	A Comprehensive Study of Predator Diets in Lake Huron./
作者:	Kierczynski, Katie Elline.
面頁冊數:	1 online resource (95 pages)
附註:	Source: Masters Abstracts International, Volume: 84-06.
Contained By:	Masters Abstracts International84-06.
標題:	Natural resource management. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29399364click for full text (PQDT)
ISBN:	9798358478787

A Comprehensive Study of Predator Diets in Lake Huron.
Kierczynski, Katie Elline.

A Comprehensive Study of Predator Diets in Lake Huron. - 1 online resource (95 pages)

Source: Masters Abstracts International, Volume: 84-06.

Thesis (M.S.)--Michigan State University, 2022.

Includes bibliographical references

Lake Huron has a history of overfishing, habitat degradation, and introductions of non-native species that have resulted in a dynamic ecosystem with a prey base of primarily non-native species. In the mid-2000s, a massive shift in the ecosystem occurred when Alewife and Chinook Salmon populations collapsed. This led to an increase in native Lake Trout and Walleye populations, despite the continued low prey biomass. Alternative prey such as non-native Round Goby and Rainbow Smelt have supported predator foraging, but it is unclear if current prey biomass levels can support the continued expansion of Lake Trout and Walleye populations. I conducted a comprehensive diet study of angler-caught predators in 2017 and 2018 to evaluate current spatial and temporal trends in the diets of the major predators of Lake Huron within the context of historical foraging conditions. I observed several prominent spatiotemporal trends for the majority of Lake Huron predator diets, including a shift in consumption from Round Goby to Rainbow Smelt between spring and summer, and an overall reduced consumption of Round Goby in Saginaw Bay compared to the main basin. I also found an increased reliance on Round Goby by native Walleye and Lake Trout compared to previous studies while Chinook Salmon continued to rely upon Rainbow Smelt and Alewife. Evidence from gut fullness indices and size distributions of consumed prey indicate that forage conditions in Lake Huron continue to decline. Overall, the predator community continues to be reliant on non-native prey, and forage conditions may be indicative of prey limitation for the foreseeable future.

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

Mode of access: World Wide Web

ISBN: 9798358478787Subjects--Topical Terms:

589570
Natural resource management.
Subjects--Index Terms:

Predator dietsIndex Terms--Genre/Form:

542853
Electronic books.

A Comprehensive Study of Predator Diets in Lake Huron.
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