Assessment of the Migrational Habits, Growth and Abundance of the Arctic Grayling Stocks of the Gulkana River During 1989 PDF Download

Author: Douglas S. Vincent-Lang
Publisher:
ISBN:
Category : Arctic grayling
Languages : en
Pages : 59

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Book Description
Estimates of stocks of Arctic grayling (Thymallus arcticus) available for sport fishing in the Gulkana River in southeast Alaska, and details of migration.

Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 722

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Author: Andrew D. Gryska
Publisher:
ISBN:
Category : Arctic grayling
Languages : en
Pages : 42

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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: David Huddart
Publisher: Springer Nature
ISBN: 3030186237
Category : Science
Languages : en
Pages : 475

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This textbook presents a comprehensive overview of the environmental impacts of various types of adventure tourism and how these can be best managed. This volume follows on from the authors previous textbook – ‘Outdoor Recreation: Environmental Impacts and Management’ and continues the aim of developing a deeper understanding of how tourist numbers impact the environment and to provide practical solutions to these problems. Combining their own first-hand experience and research with extensive literature review the authors' present several popular adventure tourism destinations from across the globe, including the Arctic, the Himalayas, Africa, Australia and Scotland as case studies. Chapters cover the particular challenges faced by each region: including impacts on animals and birds; the spread of invasive plant species and diseases; trail impacts on vegetation; impacts on geological, historical and archaeological sites and pollution and waste issues. A discussion and evaluation of the possible management actions for minimising these impacts and how outdoor recreation tourists can be regulated concludes each chapter. This practical and engaging textbook will be invaluable to students and scholars of adventure tourism and outdoor recreation as well as practitioners and managers working in the field.

Author: Thomas Biolsi
Publisher: John Wiley & Sons
ISBN: 1405182881
Category : Social Science
Languages : en
Pages : 594

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This Companion is comprised of 27 original contributions by leading scholars in the field and summarizes the state of anthropological knowledge of Indian peoples, as well as the history that got us to this point. Surveys the full range of American Indian anthropology: from ecological and political-economic questions to topics concerning religion, language, and expressive culture Each chapter provides definitive coverage of its topic, as well as situating ethnographic and ethnohistorical data into larger frameworks Explores anthropology’s contribution to knowledge, its historic and ongoing complicities with colonialism, and its political and ethical obligations toward the people 'studied'

Author: Corey J. Schwanke
Publisher:
ISBN:
Category : Arctic grayling
Languages : en
Pages : 35

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A 2-event mark–recapture study was conducted to estimate the abundance of Arctic grayling in a 9-river kilometer (RKM) reach of Lower Hungry Hollow Creek and Middle Fork Gulkana River in 2019. Intensive hook and line sampling occurred 18–22 July for the first event and 26–29 July for the second event. A total of 2,469 Arctic grayling ≥270 mm fork length (FL) were captured and marked during the first event and 2,270 were captured and examined during the second event, 204 of which were marked during the first event. A length-stratified Bailey estimator was used to estimate the abundance of Arctic grayling ≥270 mm FL in the 9-RKM study area and, because of uncertainty associated with movement at the lower end of this area, in a truncated portion of the study area encompassing only the lower 6-RKM of Hungry Hollow Creek. The estimated abundance of Arctic graying ≥270 mm FL was 40,952 (95% CI = 29,732–52,732) in the 9-RKM study area and 28,894 (95% CI = 17,975–39,813) in the 6-RKM area. Because precision requirements for these estimates were not met due to low capture probabilities for fish 270–289 mm FL, abundance was also more precisely estimated for Arctic grayling ≥290 mm FL. The estimated abundances of Arctic grayling ≥290 mm FL in the 9-RKM and 6-RKM study areas were 16,356 (95% CI = 14,050–18,663) and 10,416 (95% CI = 8,774–12,058) fish, respectively. Individual length strata abundance estimates are presented in this report. Length compositions for Arctic grayling ≥270 mm FL were very similar in both study areas, with fish 270–289 mm accounting for >60% of the estimated population, whereas larger fish (i.e., fish ≥320 mm FL) accounted for

Author: Peter N. Peregrine
Publisher: Springer
ISBN: 9780306462559
Category : Social Science
Languages : en
Pages : 381

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The Encyclopedia of Prehistory represents also defined by a somewhat different set of an attempt to provide basic information sociocultural characteristics than are eth on all archaeologically known cultures, nological cultures. Major traditions are covering the entire globe and the entire defined based on common subsistence prehistory of humankind. It is designed as practices, sociopolitical organization, and a tool to assist in doing comparative material industries, but language, ideology, research on the peoples of the past. Most and kinship ties play little or no part in of the entries are written by the world's their definition because they are virtually foremost experts on the particular areas unrecoverable from archaeological con and time periods. texts. In contrast, language, ideology, and The Encyclopedia is organized accord kinship ties are central to defining ethno ing to major traditions. A major tradition logical cultures. is defined as a group of populations sharing There are three types of entries in the similar subsistence practices, technology, Encyclopedia: the major tradition entry, and forms of sociopolitical organization, the regional sub tradition entry, and the which are spatially contiguous over a rela site entry. Each contains different types of tively large area and which endure tempo information, and each is intended to be rally for a relatively long period. Minimal used in a different way.

Author:
Publisher:
ISBN:
Category : Gypsy moth
Languages : en
Pages : 326

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Author: United States. Federal Highway Administration
Publisher:
ISBN:
Category : Air
Languages : en
Pages : 48

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Book Description
The Intermodal Surface Transportation Efficiency Act of 1991 (ISTEA) established the Congestion Mitigation and Air Quality Improvement (CMAQ) Program. The CMAQ Program emphasizes the importance of the link between transportation and air quality, by providing 6 billion dollars between 1992-1997 for transportation projects and programs to improve air quality. Consequently, many areas will be able to implement transportation control measures (TCMs), in compliance with the mandates of the Clean Air Act Amendments of 1990 (CAAA).

Author: Corey J. Schwanke
Publisher:
ISBN:
Category : Arctic grayling
Languages : en
Pages : 32

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Book Description
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.