Status and Biology of the Spawning Population of Red Rock Lakes Arctic Grayling PDF Download
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Author: James Tory Mogen
Publisher:
ISBN:
Category : Arctic grayling
Languages : en
Pages : 180
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Author: James Tory Mogen
Publisher:
ISBN:
Category : Arctic grayling
Languages : en
Pages : 180
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Author: Laura Marie Katzman
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ISBN:
Category : Arctic grayling
Languages : en
Pages : 414
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Author: Michael Nordstrom Davis
Publisher:
ISBN:
Category : Arctic grayling
Languages : en
Pages : 115
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Arctic grayling (Thymallus arcticus) are a now rare, glacial relict species occupying only a fraction of their historic range in Montana. The population in Upper Red Rock Lake is the only significant remaining native, adfluvial population and has undergone significant declines in abundance and distribution. Previous studies have documented instances of very low winter DO in the lake and low overwinter survival due to winter hypoxia has been hypothesized as a potential limiting factor for this population. We tested this hypothesis using a combined laboratory and telemetry study to document extent of hypoxia in Upper Red Rock Lake over two winters and assess the physiological tolerance, behavioral response and winter survival rate to hypoxia. In the laboratory study we observed a significant behavioral and physiological response to DO 4 mg/L and determined 24-hr LD 50 values of 0.75 mg/L for adults and 1.50 - 1.96 for juveniles at temperatures of 1 - 3°C. In the field study we recorded a period of significantly lower lakewide average DO as well as high spatial variability in DO concentration (
Author:
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Category : Chemistry
Languages : en
Pages : 442
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Author:
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Category : Aquatic sciences
Languages : en
Pages : 676
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Author: Michael Matthew Gangloff
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ISBN:
Category : Arctic grayling
Languages : en
Pages : 202
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Author:
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Category :
Languages : en
Pages : 440
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Category : Wildlife conservation
Languages : en
Pages : 28
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Author:
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Category : Biodiversity
Languages : en
Pages : 994
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Author: Bradley Bernard Shepard
Publisher:
ISBN:
Category : Arctic grayling
Languages : en
Pages : 0
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