Author: T. Mark Willette Publisher: ISBN: Category : Escapement (Fisheries) Languages : en Pages : 56
Book Description
Estimates of sockeye salmon Oncorhynchus nerka escapement to the Kenai River were determined using mark-recapture methods. Radiotelemetry was used to determine the distribution of sockeye salmon spawners within the Kenai River watershed and estimate the migratory timing of major spawning stocks and the migration rates of scokeye salmon in the Kenai River in 2006-2008.
Author: Richard Yanusz Publisher: ISBN: Category : Escapement (Fisheries) Languages : en Pages : 38
Book Description
Estimates of sockeye salmon Oncorhynchus nerka escapement to the Susitna River drainage were determined via a capture-recapture experiment, which was conducted using radio tags, fish wheels, and weirs in 2008.
Author: Robert J. Ellis Publisher: Forgotten Books ISBN: 9781333895938 Category : Business & Economics Languages : en Pages : 70
Book Description
Excerpt from Distribution, Abundance, and Growth of Juvenile Sockeye Salmon, Oncorhynchus Nerka, and Associated Species in the Naknek River System, 1961-64 In the summers of 1961 to 1963, juvenile sockeye salmon in the pelagic areas had a characteristic pattern of abundance. For the entire system: abundance (catch per tow) of age 0 increased from early summer to midsummer and then declined to late August. The abundance in late August varied about threefold and, in general, was independent of variations in the number of parents from 1960 to 1963. In July the abundance of age 0 fish in each basin was proportional to the amount of known contiguous spawning ground, but by late August this relation no longer existed. This change was at least partly due to migration of the age 0 fish - generally from basins of greater abundance of fish to those of lesser abun dance. The larger and faster growing fish were the first to migrate. Not all basins were involved in these migrations. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: Richard Yanusz Publisher: ISBN: Category : Escapement (Fisheries) Languages : en Pages : 44
Book Description
Estimates of sockeye salmon Oncorhynchus nerka escapement to the Susitna River were determined via a capture-recapture experiment, which was conducted using radio tags, fish wheels, and weirs in 2007.
Author: Kristin Courtney Publisher: ISBN: Category : Fish stock assessment Languages : en Pages : 0
Book Description
The 2022 forecast of Stikine River sockeye salmon, Oncorhynchus nerka, run abundance is poor and we anticipate very little harvest opportunity for either U.S. or Canadian fisheries. Since 1994, we have almost exclusively relied on the Canadian lower river commercial fishery to provide the stock-specific information that is used to complete the mixed stock run reconstruction for Stikine River sockeye salmon. It is highly likely there will be little commercial fishing opportunity in 2022 to gather this pertinent information. To obtain stock composition data necessary to estimate the inriver abundance, we will continue to conduct a sockeye salmon stock assessment program at Kakwan Point that began in 2021. The project will be conducted in conjunction with the existing Stikine River Chinook salmon, O. tshwaytscha, stock assessment program, and will extend the project through the end of the sockeye salmon run in mid-August. Tissue samples will be collected from sockeye salmon for genetic mixed stock analysis and for use in a genetic mark–recapture study to estimate inriver abundance based on an expansion of the Tahltan stock that is monitored via weir. We will also gather daily CPUE information, capture and spaghetti tag sockeye salmon, and estimate the age, sex, and length composition for sockeye salmon captured at Kakwan Point.
Author: Julie Bednarski Publisher: ISBN: Category : Fish populations Languages : en Pages : 0
Book Description
Estimates of the inriver abundance of Taku River sockeye salmon, Oncorhynchus nerka, are needed to assess the achievement of the spawning escapement goal and international harvest sharing arrangements for stocks specified by the U.S./Canada Pacific Salmon Treaty (Treaty). The Taku River capture-recapture project has been conducted annually since 1984 as a joint U.S./Canada program involving the Alaska Department of Fish and Game (ADF&G), Fisheries and Oceans Canada (DFO), and the Taku River Tlingit First Nation (TRTFN). The objectives of the studies are to provide estimates of the inriver abundance of Taku River sockeye salmon and to document biological characteristics (migratory timing, migratory rates, final fates, and age, sex, and size composition) of stocks. Sockeye salmon are captured via fish wheels at Canyon Island on the U.S. side of the border and the recapture consists of sampling (inspecting) sockeye salmon for tags above border in the Canadian commercial and assessment fisheries. Tagged-to-untagged ratios of salmon harvested in the Canadian inriver gillnet fisheries are used to develop the estimates of the inriver abundance of sockeye salmon. Additionally, ADF&G, in cooperation with DFO and TRTFN, will continue a sockeye salmon radiotelemetry study on the Taku River to clarify recent insights into key assumptions of annual Taku River sockeye salmon capture–recapture studies that have potential to influence abundance estimates. An array of fixed towers throughout the drainage and fixed-wing aerial surveys will be used to track radiotagged sockeye salmon to determine final fates in the drainage, to determine annual fish dropout rates (defined as any fish tagged during event one at the Canyon Island fish wheels that did not cross the border and therefore was not available for recapture in event two of the capture–recapture project), and to estimate the proportion of mainstem and lake spawners.
Author: Alyssa Frothingham Publisher: ISBN: Category : Fish populations Languages : en Pages : 55
Book Description
In 2017, the southern offshore test fishery (OTF) conducted from July 1 through July 31 captured 2,586 sockeye salmon Oncorhynchus nerka, which represented 2,194 catch per unit of effort (CPUE) index points. The midpoint of the 2017 sockeye salmon run at the southern OTF occurred on July 20. A formal inseason estimate of the 2017 run size was made on July 24 and this analysis predicted a total run to Upper Cook Inlet (UCI) of 7.11 million sockeye salmon. Therefore, the first best-fit total run estimate from the formal inseason projection of the 2017 run was approximately 54.2% higher than the actual run size. An inseason estimate was also made for the Kenai River sockeye salmon run on July 24; the July 24 analysis predicted a total run to the Kenai River that range of 1.6-4.3 million fish. Sockeye salmon and coho salmon O. kisutch genetic samples were collected from the OTF and archived for future analysis.
Author: T. Mark Willette
Author: Richard Yanusz
Author: Richard Yanusz
Author: Robert J. Ellis
Author: Robert J. Ellis
Author: Michael L. Dahlberg
Author: Richard Yanusz
Author: Kristin Courtney
Author: Julie Bednarski
Author: Alyssa Frothingham