Winter Survival and Habitat as Limiting Factors for Arctic Grayling at Red Rock Lakes National Wildlife Refuge PDF Download
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Author: Michael Nordstrom Davis
Publisher:
ISBN:
Category : Arctic grayling
Languages : en
Pages : 115
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Book Description
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: Michael Nordstrom Davis
Publisher:
ISBN:
Category : Arctic grayling
Languages : en
Pages : 115
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Book Description
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: Michael Matthew Gangloff
Publisher:
ISBN:
Category : Arctic grayling
Languages : en
Pages : 202
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Author: Laura Marie Katzman
Publisher:
ISBN:
Category : Arctic grayling
Languages : en
Pages : 414
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Author: James Tory Mogen
Publisher:
ISBN:
Category : Arctic grayling
Languages : en
Pages : 180
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Author: Mike Stamford
Publisher:
ISBN:
Category : Arctic grayling
Languages : en
Pages : 136
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Author:
Publisher:
ISBN:
Category : Fishes
Languages : en
Pages : 8
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Author: Geoffrey a McMichael
Publisher: Palala Press
ISBN: 9781341586064
Category :
Languages : en
Pages : 46
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Book Description
This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Author: Geoffrey A. McMichael
Publisher: Legare Street Press
ISBN: 9781017475784
Category : History
Languages : en
Pages : 0
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Book Description
This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Author: Alberta Conservation Association
Publisher: Government of] Alberta
ISBN: 9780778536741
Category : Arctic grayling
Languages : en
Pages : 41
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Author: David W. Wiswar
Publisher:
ISBN:
Category : Animal radio tracking
Languages : en
Pages : 24
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