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Conservation and Recovery of Hornyhead Chub
Başlık:
Conservation and Recovery of Hornyhead Chub
Yazar:
Hickerson, Brian T., author.
ISBN:
9780438021167
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Fiziksel Tanımlama:
1 electronic resource (147 pages)
Genel Not:
Source: Masters Abstracts International, Volume: 57-06M(E).
Advisors: Annika W. Walters Committee members: Melanie Murphy; Frank Rahel; Mark Smith.
Özet:
Glacial relict fish populations may be especially susceptible to common stressors like stochastic disturbance events or impacts of nonnative fishes, because of small population sizes, fragmented distributions and poor dispersal abilities. Nonnative predators are of particular concern because they represent a novel threat to glacial relict fish populations that are not adapted to their presence. Translocation of isolated glacial relict fishes into suitable, but naturally inaccessible, habitats may improve the resiliency of glacial relict fish populations to stressors like nonnative predators and stochastic disturbance events. I evaluated the effects of nonnative predators (Rainbow Trout, Brown Trout, Brook Trout, Smallmouth Bass) on an isolated glacial relict population of Hornyhead Chub in the Laramie River, Wyoming. I found that all four nonnative species preyed upon and competed with native cyprinids, including Hornyhead Chub, but that Smallmouth Bass have the greatest effect on abundance and distribution of Hornyhead Chub. I also evaluated potential translocation sites for Hornyhead Chub within the North Platte River drainage using fish community and habitat similarity. My analyses suggest that optimal translocation sites occur on the Sweetwater River, a historical Hornyhead Chub locality. By identifying limiting factors and establishing redundant populations on the landscape, glacial relict Hornyhead Chub will be more resilient to impacts of nonnative predators and stochastic disturbance events in the future.
Notlar:
School code: 0264
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Yer Numarası | Demirbaş Numarası | Shelf Location | Lokasyon / Statüsü / İade Tarihi |
---|---|---|---|
XX(692788.1) | 692788-1001 | Proquest E-Tez Koleksiyonu | Arıyor... |
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