Download or read book Seasonal Distributions and Migrations of Arctic Grayling in the Goodpaster River written by Andrew D. Gryska and published by . This book was released on 2019 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Alaska Department of Fish and Game and the Sumitomo Metal Mining Pogo LLC cooperated on a radiotelemetry project that investigated the seasonal distributions and migrations of Arctic grayling Thymallus arcticus inhabiting the Middle and Upper Goodpaster River, relative to the Pogo Mine. Radio tags were surgically implanted into 178 Arctic grayling of adult size (281-460 mm fork length [FL]) during August 2014, and locations were periodically determined through 12 aerial surveys occurring between September 2014 and December 2015. Before winter arrived, Arctic grayling vacated all small tributaries and most fish (95%) overwintered throughout the mainstem Goodpaster River, while a few individuals resided in the Tanana River. The largest concentration of radiotagged fish (57%; SE = 4.3%) was located in the 32.5 km Upper Goodpaster River section, between Glacier Creek and the Eisenmenger Fork (), and the smallest concentration (8%; SE = 2.4%) was located adjacent to the mine in the Middle Goodpaster River section, between Glacier and Central creeks (32.5 km). The Lower Goodpaster River section, from Central Creek to the mouth (104 km), held 30% (SE = 4.0%) of fish during winter, half of which were in the lower 25 km. Most grayling spawned near their overwintering area. After spawning, the tagged fish quickly vacated the Lower Goodpaster River and dispersed throughout the Middle and Upper Goodpaster River mainstem and tributaries. Fidelity to their summer feeding areas was observed but varied among individuals, including one fish that left the Goodpaster River and migrated to the Delta Clearwater River. These results indicate that impacts to the Arctic grayling population by a disturbance are lessened because the population is widely distributed and has an ability to disperse and recolonize. Nonetheless, the water quality and quantity of the migration corridor are key to the resilience of the population. Finally, these seasonal locations and the timing to and from all seasonal habitats can be used to avoid or greatly reduce impacts due to ongoing and future development.
Download or read book Seasonal Distributions and Migrations of Arctic Grayling in the Five Mile Clearwater Creek written by Andrew D. Gryska and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Alaska Department of Fish and Game investigated the summer residence and spring spawning areas of Arctic grayling Thymallus arcticus inhabiting the Five-Mile Clearwater Creek. To describe seasonal distributions and migrations, radio tags were surgically implanted into 73 Arctic grayling of adult size (297-410 mm FL) during Summer 2016, and locations were periodically determined through 8 aerial surveys occurring between July 2016 and October 2017. Additionally, residency time in the river was determined by detecting entry and exit timing of tagged fish at a tracking station at the mouth of the Five-Mile Clearwater Creek. Radiotagged Arctic grayling were found in 8 different spawning areas that were up to 225 river km apart from each other. Most tagged fish resided in the Five-Mile Clearwater Creek during summer for less than 75 days.
Download or read book Seasonal Distribution and Migration of Arctic Grayling in the Gulkana River 2016 2017 written by Corey J. Schwanke and published by . This book was released on 2019 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gulkana River Arctic grayling Thymallus arcticus were radiotagged in fall 2016 and tracked for the following 14 months to describe seasonal distributions, migration patterns, and to identify spawning areas. Radio tags were surgically implanted into 126 Arctic grayling ≥320 mm fork length (FL) in a 64.5 river kilometer (rkm) reach of the Gulkana River mainstem from the confluence of the Middle Fork Gulkana River down to a point approximately 5 rkm above Sourdough Creek. A total of 15 aerial tracking surveys were flown from 7 November 2016 through 3 November 2017. Arctic grayling located during tracking surveys exhibited migratory behavior. Fish that survived a full year had a mean home range of 60.9 rkm and 8 fish had home ranges >100 rkm. Migrations for spawning were generally upstream and began in early May. Most fish made post spawning movements upriver to summering locations in June and July, then downstream migrations to overwintering areas starting in August. Several new spawning areas were documented with Stump Creek and the West Fork Gulkana River being the most significant. Radiotagged fish were also present in other smaller unnamed tributaries around the West Fork Gulkana River confluence during the spawning period. Already recognized spawning tributaries such as the Middle Fork Gulkana River, Twelvemile Creek, and Sourdough Creek had radiotagged Arctic grayling in them during the spawning period, but Poplar Grove did not.
Download or read book Seasonal Distribution of Arctic Grayling Summering in Hungry Hollow Creek Gulkana River written by Corey J. Schwanke and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gulkana River Arctic grayling Thymallus arcticus were radiotagged in July 2020 and tracked for the following 15 months to describe seasonal distributions, migration patterns, and to identify spawning areas. Radio tags were surgically implanted into 100 Arctic grayling ≥320 mm FL in the lower 6 river kilometers (RKM) of Hungry Hollow Creek, located in the Middle Fork Gulkana River drainage. A total of 8 aerial tracking surveys were flown from 29 September 2020 through 14 October 2021, and a fixed tracking station was installed below the confluence of Hungry Hollow Creek and the Middle Fork Gulkana River. Arctic grayling located during tracking surveys exhibited strong migratory patterns. The general seasonal movements of radiotagged fish were extensive, with all radiotagged fish leaving Hungry Hollow Creek in late summer or fall and migrating downstream for overwintering. All fish that survived the winter left Hungry Hollow Creek from 16 July–7 October 2020, and had a mean date of passage of 1 September. Radiotagged fish remained stationary for most of the winter before generally moving upstream in spring for spawning, then moving even further upstream for summering. Fish that survived a full year had a mean home range of 85.2 RKM and a maximum home range of 137.6 RKM. The radiotagged Arctic grayling in this study dispersed throughout the drainage for overwintering and spawning, representing most previously documented seasonal use areas and reinforcing the importance of this small reach of river to the population.
Download or read book Seasonal Distributions of Arctic Grayling in the Upper Delta River written by Andrew D. Gryska and published by . This book was released on 2015 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Alaska Department of Fish and Game and the U.S. Bureau of Land Management cooperated in a radiotelemetry project that investigated the seasonal distributions of Arctic grayling inhabiting a 17 km portion of the Delta River in the central Alaska Range that is designated as Wild and Scenic and is adjacent to potential mineral development. Radio tags were surgically implanted into 100 Arctic grayling of adult size during July 2008, and 12 surveys (aerial and boat) occurred through December 2009 to describe seasonal locations.
Download or read book Abundance and Age and Length Composition of Arctic Grayling in the Goodpaster River in 2003 written by James F. Parker and published by . This book was released on 2006 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: Arctic grayling, Thymallus arcticus, were sampled in July 2003 to estimate abundance, and age and length composition in the North Fork Goodpaster River.
Download or read book Annual Performance Report for Distribution Abundance and Natural History of the Arctic Grayling in the Tanana River Drainage written by Stephen L. Tack and published by . This book was released on 1974 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annual Performance Report for Migrations and Distributions of Arctic Grayling Thymallus Arcticus Pallas in Interior and Arctic Alaska written by Stephen L. Tack and published by . This book was released on 1980 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chena River Arctic Grayling Stock Assessment written by Andrew D. Gryska and published by . This book was released on 2021 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project plan details a study to estimate the abundance and size composition of spawning Arctic grayling Thymallus arcticus within a 149-km index area of the Chena River, describe Arctic grayling migrations between Badger Slough and the Chena River, and describe the seasonal distribution and migratory behavior of the spawning stock of Arctic grayling residing in the lower 149 km of the Chena River during spring. A combination of mark-recapture, Passive Integrated Transponder (PIT) tagging, and radiotelemetry techniques will be used to enumerate and track fish. Resulting data will provide managers with a contemporary assessment to evaluate the effects of proposed regulatory changes on the Chena River Arctic grayling population during the January 2023 Arctic-Yukon-Kuskokwim Board of Fisheries meeting.
Download or read book Abundance Composition and Emigration of Arctic Grayling in the Goodpaster River 1995 1997 written by William P. Ridder and published by . This book was released on 1998 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annual Performance Report for Distribution Abundance and Natural History of the Arctic Grayling in the Tanana River Drainage written by Alaska. Division of Sport Fish and published by . This book was released on 1974 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hungry Hollow Creek Arctic Grayling Telemetry written by Corey J. Schwanke and published by . This book was released on 2020 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study will describe the seasonal distribution of Arctic grayling Thymallus arcticus captured in Hungry Hollow Creek of the Middle Fork Gulkana River during summer. Arctic grayling will be captured using hook-and-line gear in mid-July. One hundred adult Arctic grayling ≥320 mm FL will be surgically implanted with radio tags that will operate for ~17 months. Radiotagged Arctic grayling will be tracked throughout the year to determine overall distribution, including overwintering, spawning, and summering areas, as well as migration timing among these locations. The seasonal proportion of the tagged fish residing in Hungry Hollow Creak and the mainstem of the Gulkana River will also be estimated.
Download or read book Fishery Management Plan for Arctic Grayling in the Goodpaster River 2001 2004 written by James F. Parker and published by . This book was released on 2003 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Abundance and Composition of Arctic Grayling of the Goodpaster River 1999 written by James F. Parker and published by . This book was released on 2002 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Age Length Sex and Abundance of Arctic Grayling in the Goodpaster River 1956 Through 1988 written by William P. Ridder and published by . This book was released on 1989 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Abundance and Length and Age Composition of Arctic Grayling in the Delta Clearwater River 2000 written by Andrew D. Gryska and published by . This book was released on 2001 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stock Assessment of Arctic Grayling in Beaver and Nome Creeks 2023 written by Lisa Ann Stuby and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project plan outlines a two-event mark recapture experiment on Arctic grayling Thymallus arcticus in Beaver and Nome Creeks. Sampling will be conducted in 36 river kilometers (rkm) of the mostly road-accessible portion of Nome Creek and in the 44 rkm floatable portion of Nome Creek to the confluence of Beaver and Wickersham Creeks during July 2023. This follows a 2-year radiotelemetry study on Arctic grayling in the Beaver Creek drainage, where information acquired on life history such as migration timing, seasonal habitat preferences, and distribution has informed the timing, index area, and future data analyses for this mark-recapture experiment. The marking event will occur in early July, where three 2-person crews will sample a total of 6 rkm each day (i.e., 2 rkm per crew) and deploy approximately 1,000 Floy tags in Arctic grayling ≥250 mm FL. The recapture event will occur in late July, where Arctic grayling will be captured throughout the index area using the same methodologies employed during the first event and fish will be examined for tags. The population estimates acquired in 2023 will be compared to the last assessment conducted in 2000.
