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Do Didymosphenia geminata Blooms Aff...
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Clancy, Niall G.
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Do Didymosphenia geminata Blooms Affect Fishes in the Kootenai River Basin?
紀錄類型:
書目-電子資源 : Monograph/item
正題名/作者:
Do Didymosphenia geminata Blooms Affect Fishes in the Kootenai River Basin?/
作者:
Clancy, Niall G.
出版者:
Ann Arbor : ProQuest Dissertations & Theses, : 2020,
面頁冊數:
61 p.
附註:
Source: Masters Abstracts International, Volume: 82-04.
Contained By:
Masters Abstracts International82-04.
標題:
Ecology. -
電子資源:
https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28092182
ISBN:
9798672180212
Do Didymosphenia geminata Blooms Affect Fishes in the Kootenai River Basin?
Clancy, Niall G.
Do Didymosphenia geminata Blooms Affect Fishes in the Kootenai River Basin?
- Ann Arbor : ProQuest Dissertations & Theses, 2020 - 61 p.
Source: Masters Abstracts International, Volume: 82-04.
Thesis (M.S.)--Utah State University, 2020.
This item must not be sold to any third party vendors.
Didymosphenia geminata (Didymo) is a nuisance algae that can cover entire streambeds under certain environmental conditions. Numerous studies have shown that it changes the composition of stream invertebrates. Fishes in many headwaters are known to feed almost exclusively on invertebrates. Thus, there is concern changes to the amount or type of invertebrates caused by Didymo blooms will impact fishes such as trout, charr, and sculpin. In the Kootenai River basin of Montana and British Columbia, we examined stream invertebrates and fish diets, condition, and growth across 25 streams during the summers of 2018 and 2019. The severity of Didymo blooms in these streams ranged from 0 -80% coverage of the entire streambed. In 2018, we observed significant shifts in the types of stream invertebrates available to trout in Didymo-affected streams. However, trout diets and growth rate were not affected. In 2019, trout, charr, and sculpin diets in streams with severe Didymo blooms were similar to streams with little to no Didymo. Condition of all three types of fish were unaffected. We therefore conclude that summer Didymo blooms have no obvious impacts on the diet, condition, or growth of these fishes. We suggest further studies document potential impacts during winter months and on sensitive invertebrates such as freshwater mussels.
ISBN: 9798672180212Subjects--Topical Terms:
516476
Ecology.
Subjects--Index Terms:
Bull Trout
Do Didymosphenia geminata Blooms Affect Fishes in the Kootenai River Basin?
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Didymosphenia geminata (Didymo) is a nuisance algae that can cover entire streambeds under certain environmental conditions. Numerous studies have shown that it changes the composition of stream invertebrates. Fishes in many headwaters are known to feed almost exclusively on invertebrates. Thus, there is concern changes to the amount or type of invertebrates caused by Didymo blooms will impact fishes such as trout, charr, and sculpin. In the Kootenai River basin of Montana and British Columbia, we examined stream invertebrates and fish diets, condition, and growth across 25 streams during the summers of 2018 and 2019. The severity of Didymo blooms in these streams ranged from 0 -80% coverage of the entire streambed. In 2018, we observed significant shifts in the types of stream invertebrates available to trout in Didymo-affected streams. However, trout diets and growth rate were not affected. In 2019, trout, charr, and sculpin diets in streams with severe Didymo blooms were similar to streams with little to no Didymo. Condition of all three types of fish were unaffected. We therefore conclude that summer Didymo blooms have no obvious impacts on the diet, condition, or growth of these fishes. We suggest further studies document potential impacts during winter months and on sensitive invertebrates such as freshwater mussels.
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https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28092182
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