Download or read book River Features Associated with Chinook Salmon Spawning Habitat in Southwest Alaska written by Deena M. Jallen and published by . This book was released on 2009 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Chinook salmon Oncorhynchus tshawytscha are a highly valued traditional, subsistence, and commercial resource in southwest Alaska. Stream habitat availability is a major component influencing salmon productivity. The objective of this study is to identify river features associated with spawning habitat, and describe upper and lower boundaries of Chinook salmon spawning on the Tuluksak River. River distances, elevation, salmon locations, spawning sites, and habitat observations were collected along 75 rkm (river kilometers) of the Tuluksak River primarily within the Yukon Delta National Wildlife Refuge. Habitat and salmon observations were grouped into strata along the length of the river for comparison and analysis. Chinook salmon were observed spawning in the upper 45 rkm of the study area. Map-based observations of elevation and channel sinuosity correlate better with Chinook salmon spawning than in stream habitat measurements along the Tuluksak River. The upper boundary of Chinook salmon spawning in the Tuluksak River was outside of our study area. The lower boundary for Chinook salmon spawning habitat on similar rivers might be determined by examining elevation, sinuosity, and channel features from remote images or maps prior to conducting field studies"--Leaf iii.

Download or read book Factors Influencing Chinook Salmon Spawning Distribution in the Togiak River Alaska written by Stephanie L. Meggers and published by . This book was released on 2018 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Salmonids are heavily dependent on specific habitat characteristics for survival, yet few studies in Alaska have examined the relationship between habitat and spawning distribution, using remote sensing approaches. To better understand the relationship between Chinook Salmon Oncorhynchus tshawytscha spawning distribution and environmental variables like habitat type (e.g., run, riffle, pool), temperature, and proximity to channel islands, optical and thermal imagery were collected on the Togiak and Ongivinuk rivers in southwest Alaska. Object-based image analysis was used to classify and quantify habitat types, while thermal characteristics and the proximity of spawning locations to channel islands were determined in a GIS framework. Object-based image analysis was useful for classifying habitat and may provide a better alternative to pixel-based image analysis. However, rule sets were nontransferable and inconsistent among river reaches, and caution should be taken when these methods are used on large river sections. Chinook Salmon showed a preference for spawning in river runs, 80% of fish spawned in water temperatures between 8.6° and 9.4°C, and nearly 61% of Chinook Salmon spawned within 100 m of a channel island. This study provided a baseline understanding of environmental correlates of spawning for Chinook Salmon at the northern extent of their range.

Download or read book Relation of Scale Characteristics to River of Origin in Four Stocks of Chinook Salmon oncorhynchus Tshawytscha in Alaska written by Richard G. Rowland and published by . This book was released on 1969 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Status of Chinook Salmon Spawning and Rearing Habitat in the Salmon River Drainage written by William S. Platts and published by . This book was released on 1992 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study of Chinook Salmon in Southeast Alaska written by Dennis Hubartt and published by . This book was released on 1987 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of a Spawning Habitat Enhancement Site for Chinook Salmon in a Regulated California River written by Stephen Monismith and published by . This book was released on 2003 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Kenai River Juvenile Chinook Salmon Distribution and Habitat Utilization written by Alaska. Division of Fisheries Rehabilitation, Enhancement, and Development and published by . This book was released on 1984 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Characterization of Geomorphology and Hyporheic Conditions of Spring Chinook Salmon Spawning Habitat Within the Yakima River Basin Washington written by Amanda Brooke Asbury and published by . This book was released on 2003 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Escapements of Chinook Salmon in Southeast Alaska and Transboundary Rivers in 2022 written by Philip Richards and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Estimates of Chinook salmon Oncorhynchus tshawytscha spawning escapement in 2022 will be summarized for 11 Southeast Alaska river systems: Situk River, Alsek River, Chilkat River, Taku River, King Salmon River, Stikine River, Unuk River, Chickamin River, Blossom River, Keta River, and Andrew Creek. Spawning escapements will be estimated using aerial surveys, foot surveys, mark–recapture studies, and weirs. The Alaska Department of Fish and Game and Fisheries and Oceans Canada use these data, along with age composition data to make terminal and regional management decisions, and the Pacific Salmon Commission uses these data for coastwide management and stock assessment.

Download or read book The Bears of Brooks Falls Wildlife and Survival on Alaska s Brooks River written by Michael Fitz and published by The Countryman Press. This book was released on 2021-03-09 with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt: A natural history and celebration of the famous bears and salmon of Brooks River. On the Alaska Peninsula, where exceptional landscapes are commonplace, a small river attracts attention far beyond its scale. Each year, from summer to early fall, brown bears and salmon gather at Brooks River to create one of North America’s greatest wildlife spectacles. As the salmon leap from the cascade, dozens of bears are there to catch them (with as many as forty-three bears sighted in a single day), and thousands of people come to watch in person or on the National Park Service’s popular Brooks Falls Bearcam. The Bears of Brooks Falls tells the story of this region and the bears that made it famous in three parts. The first forms an ecological history of the region, from its dormancy 30,000 years ago to the volcanic events that transformed it into the Valley of Ten Thousand Smokes. The central and longest section is a deep dive into the lives of the wildlife along the Brooks River, especially the bears and salmon. Readers will learn about the bears’ winter hibernation, mating season, hunting rituals, migration patterns, and their relationship with Alaska’s changing environment. Finally, the book explores the human impact, both positive and negative, on this special region and its wild population.

Download or read book Comparison of Spawning Areas and Times for Two Runs of Chinook Salmon Oncorhynchus Tshawtscha in the Kenai River Alaska written by Carl V. Burger and published by . This book was released on 1984 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Spawning Escapement of Chinook Salmon in the Stikine River 2022 2024 written by Kristin Courtney and published by . This book was released on 2022 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: The inriver abundance of large (fish =660 mm mid eye to tail fork [METF] length) Chinook salmon Oncorhynchus tshawytscha above the U.S./Canada border (border) will be estimated annually from 2022 to 2024 in the Stikine River, near Wrangell, Alaska. A modified Petersen 2-event mark–recapture project will be conducted using drift gillnets to mark large Chinook salmon in the first event, and collection of samples in the Canadian commercial fishery, Little Tahltan River video weir, and on the spawning grounds will serve as the second event. Additional project objectives are to a) estimate the annual spawning escapement of large Chinook salmon above the border, b) estimate the age, sex, and length composition of both the inriver run and spawning escapement, and c) estimate the proportion of large radiotagged Chinook salmon that cross the border. The Alaska Department of Fish and Game (ADF&G) and Fisheries and Oceans Canada (DFO) use these data to make terminal and regional management decisions, and the Pacific Salmon Commission (PSC) uses the data for coastwide management and stock assessment through the Chinook Technical Committee (CTC 2021).

Download or read book Operational Plan Escapements of Chinook Salmon in Southeast Alaska and Transboundary Rivers in 2021 written by Philip Richards and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Estimates of Chinook salmon Oncorhynchus tshawytscha spawning escapement will be summarized for 2021 in 11 Southeast Alaska river systems. Chinook index salmon systems include: Situk River, Alsek River, Chilkat River, Taku River, King Salmon River, Stikine River, Unuk River, Chickamin River, Blossom River, Keta River, and Andrew Creek. Spawning escapements will be estimated using aerial and foot surveys, mark-recapture studies, and weirs. The Alaska Department of Fish and Game and Fisheries and Oceans Canada use these data, along with age composition data to make terminal and regional management decisions, and the Pacific Salmon Commission uses these data for coastwide management and stock assessment.

Download or read book Evaluation of Chinook Salmon Spawning Habitat Quality in the Shasta and South Fork Trinity Rivers 1994 written by Howard W. Jong and published by . This book was released on 1997 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Large Wood Aids Chinook Salmon Oncorhynchus Tshawytscha Spawning in Marginal Habitat on a Regulated River in California written by Anne Elizabeth Senter and published by ProQuest. This book was released on 2008 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: To determine whether large wood (LW,>̲1 m length,>̲10 cm diameter) plays a role in Chinook salmon redd (i.e. egg nests) placements in a regulated, medium-sized, Mediterranean-climate river, characteristics of 542 large wood pieces, locations of 650 redds, and habitat unit delineations (riffle, run, glide, pool) were collected during a spawning season along a 7.7 km reach directly below Camanche Dam on the Mokelumne River (average width 31 m). Large wood was regularly distributed across the study reach with an average of 70 LW pieces km−1. Some LW clustering was evident at islands. Chinook spawners built 75% of observed redds at spawning habitat rehabilitation sites, and 85% of redds were within one average channel width of large wood. At the hydraulic scale of ~10−1 channel widths, redds were within a 10-m radius of large wood 36% of the time. These results suggest that spawners had the opportunity to utilize large wood as cover and refugia. In the lower 4.7 km where marginal habitat was prevalent, redds were within a 5-m radius of large wood 21% of the time and within a 2.5 m radius 10% of the time, indicating use of the hydraulic properties of instream large wood structures. Results from randomized tests indicate that large wood-redd interactions systematically occurred at a greater rate than by random chance alone in the lower 4.7 km, but not in the upper 3 km, which implies that large wood aids spawning in marginal habitats. Key Words: large wood, gravel rivers, Chinook salmon, ecohydraulics, fluvial geomorphology, river rehabilitation.

Download or read book The Complete Angler written by Izaak Walton and published by . This book was released on 1903 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Operational Plan Escapements of Chinook Salmon in Southeast Alaska and Transboundary Rivers in 2020 written by Philip Richards and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Estimates of Chinook salmon Oncorhynchus tshawytscha spawning escapement will be summarized for 2020 in 11 Southeast Alaska river systems. Chinook index salmon systems include: Situk River, Alsek River, Chilkat River, Taku River, King Salmon River, Stikine River, Unuk River, Chickamin River, Blossom River, Keta River, and Andrew Creek. Spawning escapements will be estimated using aerial and foot surveys, mark-recapture studies, and weirs. The Alaska Department of Fish and Game and Fisheries and Oceans Canada use these data, along with age composition data to make terminal and regional management decisions, and the Pacific Salmon Commission uses these data for coastwide management and stock assessment.