Population Dynamics of Arctic Grayling in the Upper Susitna Basin PDF Download
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Author: Dana C. Schmidt Publisher: ISBN: Category : Arctic grayling Languages : en Pages : 23
Book Description
Presents population dynamics model to determine effects of catch and release management strategies in anticipation of a sport fishery of arctic grayling. Improved access to such a fishery in the upper Susitna River basin would be associated with the hydroelectric project. Sampling sites were located along tributaries (mostly at areas of confluence) of the Susitna River above the Devil Canyon dam site.
Author: Dana C. Schmidt Publisher: ISBN: Category : Arctic grayling Languages : en Pages : 23
Book Description
Presents population dynamics model to determine effects of catch and release management strategies in anticipation of a sport fishery of arctic grayling. Improved access to such a fishery in the upper Susitna River basin would be associated with the hydroelectric project. Sampling sites were located along tributaries (mostly at areas of confluence) of the Susitna River above the Devil Canyon dam site.
Author: Jenny Lou Neyme Publisher: ISBN: Category : Arctic grayling Languages : en Pages : 122
Book Description
"I compared the life-history and population dynamics of arctic grayling Thymallus arcticus in western and Interior Alaska. Fish in western Alaska grew rapidly to a large maximum size, adult mortality rates were low and juvenile mortality rates were high. As a result, western populations consisted mainly of larger, older fish. Fish in Interior streams grew more slowly to a smaller maximum size, adult mortality rates were higher and juvenile mortality rates lower than in western streams. As a result, Interior populations consisted mainly of smaller, younger fish. The relationship between body size and ovary mass was similar between regions, but Interior fish allocated a greater proportion of their annual energy budget to reproduction. I also used a foraging model to test the hypothesis that regional differences in drift-feeding opportunities were responsible for faster growth and larger size in arctic grayling in western Alaska and to determine the relative contribution of invertebrate drift density and physical habitat characteristics to regional differences in profitability. The model predicted that drift-feeding would be more profitable in western Alaska and that regional differences in invertebrate drift density and size composition were responsible for this difference"--Leaf iii.
Author: Charles O. Swanton Publisher: ISBN: Category : Arctic grayling fisheries Languages : en Pages : 90
Book Description
Wild arctic grayling Thymallus arcticus distribution, life history, and past stock assessment in the Arctic-Yukon-Kuskokwim Region and the Upper Copper/Upper Susitna Management Area are presented. As a basis for this management plan, sport fisheries that target arctic grayling in this geographic area are characterized along with the known growth and population characteristics of the species. Management options are presented that would maintain harvest at sustainable levels, including harvest restrictions and special management areas.
Author: Joseph R. Spencer Publisher: ISBN: Category : Arctic grayling Languages : en Pages : 0
Book Description
This project will describe the size composition and movements of Arctic grayling Thymallus arcticus susceptible to catch in a 16-km index area of Mendeltna Creek, from Old Man Lake down to the Glenn Highway Bridge, during spring and summer 2023. Resulting data will be used to determine if Sport Fish regulations for this fishery can be liberalized. Mendeltna Creek in the Tazlina River drainage is one of the few clearwater streams with easy shore access in the Upper Copper/Upper Susitna Management Area. In the mid-1990s, the creek supported relatively large harvests of Arctic grayling (nearly 1,000 fish annually), but studies conducted in the late 1990s indicated that the population was unlikely to sustain this level of harvest, and conservative regulations were introduced to protect the easily accessible population. Harvests of Arctic grayling from Mendeltna Creek have since declined substantially (to
Author: Andrew D. Gryska Publisher: ISBN: Category : Arctic grayling Languages : en Pages : 42
Book Description
The Gulkana River, located along the Richardson Highway near Glennallen, Alaska, supports the largest Arctic grayling (Thymallus arcticus) fishery in the Upper Copper Upper Susitna Management Area. Most of the fishing effort and harvest occurs in a 75 km section of the mainstem river between Paxson Lake and Sourdough Creek. From 1989 until present, the Arctic grayling daily bag limit downstream of Paxon Lake has been 5 fish, only one of which can be over 14 inches. To evaluate the effectiveness of this regulation, a stock assessment was performed for the Arctic grayling population inhabiting the 75 km section in July and August 2017. Mark-recapture techniques were used to estimate abundance and length composition of the population. Using hook and line gear, a total of 3,002 Arctic grayling ≥240 mm fork length (FL) were captured; however, too few fish were recaptured (m2 = 6) to estimate abundance without bias. Data collected during this study was compared to previous stock assessments, and it was concluded that the mainstem Gulkana River does not support substantial numbers of large Arctic grayling during the summer. Given the composition of the population (numerous Arctic grayling
Author: Dana C. Schmidt
Author: Dana C. Schmidt
Author: Stephen Thaddeus Grabacki
Author: Jenny Lou Neyme
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Author: Charles O. Swanton
Author: Rolland A. Holmes
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Author: Joseph R. Spencer
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Author: Andrew D. Gryska