Download or read book Seasonal Movements of Arctic Grayling in a Small Stream on the Arctic Coastal Plain Alaska written by Kurt C. Heim and published by . This book was released on 2014 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: In watersheds of the Arctic Coastal Plain (ACP) of Alaska, Arctic Grayling adopt a migratory life history strategy to persist in a landscape with long (~ 8 month), cold winters that cause shallow aquatic habitats to freeze solid. We investigated movement patterns of adult and juvenile Arctic Grayling in a shallow beaded stream (Crea Creek), a dominant headwater stream type on the ACP. From 2012-2013 Arctic Grayling (N = 1035) were tagged with passive integrated transponder tags and monitored using an array of stream-wide antennae. Migration into Crea Creek peaked immediately after ice break-up in the main channel of the study area. Fish caught within the stream in June were in relatively poor body condition compared to fish captured later in summer. In both years, fish entering the stream during high flow and colder temperatures swam farther upstream than those entering during low flow and warmer temperatures. Migration of adult fish out of the stream was most strongly correlated with decreasing stream discharge, whereas juvenile downstream migration occurred in two peaks and was negatively correlated to minimum stream temperature and discharge. Among juveniles, fish of larger size and higher body condition tended to emigrate earlier. These results indicate that the population level migratory response is strongly tied to seasonal changes in hydrology, though heterogeneity among individuals also influences the response to seasonal change. This work demonstrates the importance of environmental cues, and surface-water flow mediated connectivity during the open-water period, and provides information needed to identify susceptibilities of migratory fishes to climate change and petroleum development on the ACP.
Download or read book Trophic Pathways Supporting Arctic Grayling in a Small Stream on the Arctic Coastal Plain Alaska written by Jason John McFarland and published by . This book was released on 2015 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Arctic Grayling (Thymallus arcticus) are widely distributed on the Arctic Coastal Plain (ACP) of Alaska, and are one of the few upper level consumers in streams, but the trophic pathways and food resources supporting these fish are unknown. Grayling migrate each summer into small beaded streams, which are common across the landscape on the ACP, and appear to be crucial foraging grounds for these and other fishes. I investigated prey resources supporting different size classes of grayling in a beaded stream, Crea Creek, where petroleum development is being planned. The specific objectives were to measure terrestrial prey subsidies entering the stream, quantify prey ingested by Arctic Grayling and Ninespine Stickleback (Pungitius pungitius), determine if riparian plant species affect the quantity of terrestrial invertebrates ingested by grayling, and determine if prey size and type ingested were a function of predator size. Results indicated that small grayling ( 15 cm fork length (FL)) consumed mostly aquatic invertebrates (caddisflies, midges, and blackflies) early in the summer, and increasing quantities of terrestrial invertebrates (wasps, beetles, and spiders) later in summer, while larger fish ( 15 cm FL) foraged most heavily on stickleback. Riparian plant species influenced the quantity of terrestrial invertebrates entering the stream, however these differences were not reflected in fish diets. This study showed that grayling can be both highly insectivorous and piscivorous, depending upon fish size class, and that both aquatic and terrestrial invertebrates, and especially stickleback, are the main prey of grayling. These results highlight the importance of beaded streams as summer foraging habitats for grayling. Understanding prey flow dynamics in these poorly studied aquatic habitats, prior to further petroleum development and simultaneous climate change, establishes essential baseline information to interpret if and how these freshwater ecosystems may respond to a changing Arctic environment.
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 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 Movements and Habitat Use of Arctic Grayling Thymallus Arcticus Burbot Lota Lota and Broad Whitefish Coregonus Nasus Within the Fish Creek Drainage of the National Petroleum Reserve Alaska 2001 2002 written by William A. Morris and published by . This book was released on 2003 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Arctic National Wildlife Refuge Alaska Coastal Plain Resource Assessment written by U.S. Fish and Wildlife Service and published by . This book was released on 1986 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fly Fishing for Alaska s Grayling written by Cecilia Kleinkauf and published by Frank Amato Publications. This book was released on 2009-11 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: An intriguing creature with its graceful sail-like dorsal fin, and willing to take your fly almost endlessly, the Arctic grayling is a fish like no other. Add to that its preferred habitat of the cold, clear streams of the northern wilderness and some of your dreams of fishing perfection will come true. A well-respected guide, instructor, award-winning writer, and volunteer, Pudge Kleinkauf has owned and operated Women's Flyfishing for 22 of the 39 years she has lived and fished in Alaska. An admitted Arctic grayling fanatic, Pudge Kleinkauf is just the person to write on this unique fish. With an entertaining style and in-depth information, "Fly-Fishing for Alaska's Arctic Grayling" includes: the fish and its lifecycle; the art of catching grayling; productive fly patterns; Arctic grayling around Alaska and the world; protecting Arctic grayling; and so much more. The biology and history of Arctic grayling, their habitat and feeding habits, where and how to find them, fly-fishing techniques and equipment, fly patterns, conservation, lots of Alaska information-everything you need to know about Arctic grayling, "the flower of the fishes." Don't be surprised if you come under its spell, as have so many anglers before you.
Download or read book Toolik Lake written by James J. O'Brien and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: The limnological study of Toolik Lake began in the Summer of 1975. This research was an outgrowth of the arctic IBP project which had focused mainly on small Arctic pond ecosystems on the Alaskan Arctic coastal plain. It was thought desirable to study larger, deeper lakes which contained fish to further generalizations developed during the IBP study. Initial research on Toolik Lake and the surrounding lakes and ponds focused on process studies such as annual primary productivity of the lake or the vertical migration patterns of the resident zooplankton. In 1983 the philosophy of the research changed with the funding of a more integrated programme. The fundamental question posed was whether Arctic lake and stream ecosystems are regulated from the bottom up by nutrient availability or from the top down by the density and activity of top predators. In 1987 the Toolik Lake area was designated an LTER (Long-Term Ecological Research) site, one of 18 such sites throughout the United States, Puerto Rico and the Antarctic. The research theme for the Arctic LTER also focuses on the regulation of Arctic ecosystems, whether regulation comes from the top down or bottom up. The Arctic LTER also incorporates a terrestrial component as well as a lake and stream component.
Download or read book Arctic National Wildlife Refuge Alaska Coastal Plain Resource Assessment written by United States. Department of the Interior and published by . This book was released on 1987 with total page 1246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 The Natural History of an Arctic Oil Field written by Joe C. Truett and published by Elsevier. This book was released on 2000-06-09 with total page 461 pages. Available in PDF, EPUB and Kindle. Book excerpt: In spite of the harsh conditions that characterize the Arctic, it is a surprisingly fragile ecosystem. The exploration for oil in the Arctic over the past 30 years has had profound effects on the plants and animals that inhabit this frozen clime. The Natural History of an Arctic Oil Field synthesizes decades of research on these myriad impacts. Specialists with years of field experience have contributed to this volume to create the first widely available synopsis of the ecology and wildlife biology of animals and plants living in close association with an actively producing oil field. - First widely available synthesis of arctic oil field ecology and wildlife biology - Concise yet readable treatment of a diverse polar ecosystem - Useful for land managers, policy makers as well as ecologists, and population biologists - Chapters authored by recognized authorities and contributions are peer-reviewed for accuracy and scientific rigor - Illustrations attractively designed to enhance comprehension
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 Fishery Resources of Waters Along the Route of the Trans Alaska Pipeline Between Yukon River and Atigun Pass in North Central Alaska written by Norval F. Netsch and published by . This book was released on 1975 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Data collected from June 1971 to April 1974 along the Trans-Alaska pipeline route. 2,226 arctic grayling were tagged.
Download or read book Life History and Migration Patterns of Arctic Grayling Thymallus Arcticus Pallas in the Tanana River Drainage of Alaska written by Roger J. Reed and published by . This book was released on 1964 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Arctic National Wildlife Refuge N W R Coastal Plain Resource Assessment written by and published by . This book was released on 1987 with total page 1012 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Growth Foraging Behavior and Distribution of Age 0 Arctic Grayling in an Alaskan Stream written by Cheryl Ann Dion and published by . This book was released on 2002 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: "I evaluated the ability of three models to relate habitat characteristics to habitat quality for age-0 Arctic grayling Thymallullus arcticus in an Alaska stream. A temperature-based growth model made accurate predictions, showing it can reliably assess thermal habitat quality. Deviations between predicted and observed growth were useful because they identified the timing of possible critical periods, when competition for food or space may cause density-dependent mortality and emigration. A foraging model consistently overestimated the mean prey size of fish, showing that such models need further work before then can accurately assess food availability from invertebrate drift. A habitat selection model accurately predicted small fish would occupy the stream margins and the ontogenetic shift into faster, deeper water, but its detailed predictions for larger fish were not very precise. These models were useful tools for assessing habitat quality and gave insight into possible interactions between habitat characteristics and population dynamics"--Leaf iii.
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.
