Download or read book Production Potential of Sockeye Salmon Nursery Lakes in Southern Southeast Alaska written by T. P. Zadina and published by . This book was released on 1995 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Potential sockeye Oncorhynchus nerka salmon production for 112 anadromous lake systems in southern Southeast Alaska were calculated using an euphotic volume model"--Page vi.
Download or read book Growth of Juvenile Chilkat Lake Sockeye Salmon in Response to Density dependent and Environmental Factors written by Jodi Neil (C.) and published by . This book was released on 2018 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chilkat Lake, in northern Southeast Alaska, is home to a Sockeye Salmon Oncorhynchus nerka population that is an important component in local commercial, sport, and subsistence fisheries, and has been monitored since the late 1960s. The population began declining in the late 1980s, prompting fishery managers to evaluate the production potential of Chilkat Lake to determine if it could be a candidate for enhancement efforts such as fry stocking or lake fertilization. Sockeye Salmon fry were stocked into Chilkat Lake intermittently from 1989 to 2004 in both small- (
Download or read book Possible Management Procedures for Increasing Production of Sockeye Salmon Smolts in the Naknek River System Bristol Bay Alaska written by Robert J. Ellis and published by . This book was released on 1979 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Limnological and Fishery Investigations Concerning Sockeye Salmon Production in Delight and Desire Lakes written by Jim A. Edmundson and published by . This book was released on 1998 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a comprehensive assessment of the physical, chemical, and biological aspects of Delight and Desire lakes (part of Nuka Bay Watershed, southeast Kenai Peninsula), the objective being to determine and compare each lake's existing and potential rearing capacity for juvenile sockeye salmon.
Download or read book Biological Characteristics and Population Status of Anadromous Salmon in Southeast Alaska written by and published by . This book was released on 2000 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Assessing the Production of Sockeye Salmon Oncorhynchus Nerka at Chilkat Lake Southeast Alaska Using Current Trophic Conditions and the Paleolimnologic Sediment Record written by David Barto and published by . This book was released on 2004 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Anadromous sockeye salmon are the only Pacific salmon that require an extensive rearing period in a lake environment. Recent studies suggest changes in lake nutrient inputs are directly related to the magnitude of annual spawning populations (escapement), and can be quantified by sediment stable isotope analysis of nitrogen 15N). Marine nitrogen supplied by returned salmon is enriched in 15N relative to the freshwater nitrogen, which is derived from atmospheric N2 (ð15N=0 0/00). Recent (1987-1996) limnological investigations of Chilkat Lake, Alaska, matched to brood year escapement estimates, indicate that sockeye marine-derived phosphorus and nitrogen contributed up to 87% and 20%, respectively, of the lake nutrient pool. Since salmon populations fluctuate annually, the resulting marine derived nutrient (MDN) inputs and ð15N also fluctuate. Sedimentary ð15N is positively correlated (r2=0.8605, p=0.0076, df=5) with observed escapement. Additionally, ð15N is positively related to lake paleoproductivity and inversely correlated with high concentrations of CaCO3 and glacial silt. The frequency and duration of these CaCO3 inputs are believed to be the result of climate related glacial meltwater intrusions from the Tsirku River. Thus, fluctuations in MDN can be shown to influence the overall sockeye salmon production at Chilkat Lake by controlling lake productivity"--Leaf iii.
Download or read book Possible Management Procedures for Increasing Production of Sockeye Salmon Smolts in the Naknek River System Bristol Bay Alaska Classic Reprint written by Robert J. Ellis and published by Forgotten Books. This book was released on 2018-02-28 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Possible Management Procedures for Increasing Production of Sockeye Salmon Smolts in the Naknek River System, Bristol Bay, Alaska In freshwater, juvenile sockeye salmon typically occupy four successive habitats for varying periods: spawning gravels of streams or lake beaches for several months, littoral of lakes for a few weeks, Open water areas of the lakes for several months to 2 or 3 yr, and an outlet river through which the smolts travel for a few hours or days to reach the ocean. Two factors seem most likely to limit the production of smolts: the quan tity and quality of spawning grounds, which may limit the number of fry produced, and the productivity of the pelagic waters of the lakes where juvenile salmon do most of their feeding and growing. 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.
Download or read book General Technical Report PNW GTR written by and published by . This book was released on 1999 with total page 990 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hugh Smith Lake Sockeye Salmon 2016 written by Malika T. Brunette and published by . This book was released on 2017 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2016, we continued long-term sockeye salmon population studies at Hugh Smith Lake designed to evaluate adult sockeye salmon abundance and juvenile production. An estimated 32,000 sockeye salmon smolt were counted through a smolt weir operated at the outlet of the lake from 20 April to 4 June. We estimated 85% of the smolt were freshwater age-1 and 14% were freshwater age-2. From 17 June to 13 November we enumerated the adult salmon escapement through a weir, conducted an ancillary mark-recapture study to confirm the weir count, and collected biological information to estimate the age, length, and sex composition of the sockeye salmon escapement. The weir count of 12,868 adult sockeye salmon was the 12th escapement in the past 14 years to exceed the lower bound of the optimal escapement goal range of 8,000-18,000 adult sockeye salmon. Age-1.3 adults were the dominant returning age class, representing an estimated 67% of the total spawning population. A count of 1,810 live spawners was observed in Buschmann Creek on 15 September. The reported subsistence harvest (404 fish) was the fifth largest harvest on record. Results from genetic stock identification analysis were used to estimate the contribution of Hugh Smith Lake sockeye salmon to southern Southeast Alaska commercial net fisheries. We estimated 35,600 Hugh Smith Lake fish were harvested in District 101-108 net fisheries in 2016 at an estimated commercial harvest rate of 73%.
Download or read book Limnological and Fisheries Assessment of the Potential Production of Sockeye Salmon Oncorhynchus Nerka in Spiridon Lake written by Gary B. Kyle and published by . This book was released on 1990 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Commercial Harvest of Klawock Lake Sockeye Salmon in the District 103 and 104 Purse Seine Fisheries Southeast Alaska 2018 2021 written by Chase S. Jalbert and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Genetic mixed-stock analysis of sockeye salmon (Oncorhynchus nerka) harvested in the commercial purse seine fisheries was used to estimate the harvest of Klawock Lake sockeye salmon in southern Southeast Alaska over a 4-year period (2018–2021). The commercial fisheries in management Districts 103 and 104 were targeted because they are terminal to Klawock Lake and most of the commercial harvest of Klawock Lake sockeye salmon probably occurs in those districts. We further split District 103 into 2 spatial strata: Northern District 103 (subdistricts 50–90) and Southern District 103 (subdistricts 11–40). The harvest of Klawock Lake sockeye salmon was highest in Northern District 103 in 3 of 4 years (2018–2020). The total commercial harvest (Districts 103 and 104) of Klawock Lake sockeye salmon was 2,619 fish in 2018, 5,523 fish in 2019, 3,352 fish in 2020, and 6,677 fish in 2021. These data, combined with escapement and subsistence harvests, were used to produce the first estimates of total run size for Klawock Lake sockeye salmon. The total run size varied from year to year, with 13,147 fish in 2018, 14,953 fish in 2019, 19,702 fish in 2020, and 13,600 fish in 2021. Similarly, overall harvest rates varied from 43.9% in 2018 to 59.9% in 2021 (average = 50.9%). Commercial harvest rates were higher in odd years (43.0%) than even years (18.5%), presumably due to increased fishing pressure on more abundant odd-year pink salmon. The subsistence harvest rate averaged 20.1% across all years and averaged higher (27.9%) than the commercial harvest rate in even years.
Download or read book Ecological Studies of Sockeye Salmon and Related Limnological and Climatological Investigations Brooks Lane Alaska 1957 written by Theodore R. Merrell and published by . This book was released on 1964 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ecological studies on the fresh-water phases of the life history of sockeye salmon and studies on related limnology and climatology were made at Brooks Lake, Alaska, in 1957. Data are presented and interpreted on adult sockeye salmon spawning distributions and behavior, age, sex, length, fecundity, and bear predation; on juvenile sockeye salmon ages, food, growth, migration from the lake, relative abundance, and distribution in the lake; and on climatological and limnological factors that may influence sockeye salmon behavior and abundance.
Download or read book An In season Management System for Sockeye Salmon Returns to Lynn Canal Southeast Alaska written by Scott Alan McPherson and published by . This book was released on 1990 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Master thesis aimed at providing an information system to the managers of the Lynn Canal (southeastern Alaska) sockeye salmon (Oncorhynchus nerka) resource which will provide the tools to harvest the optimal annual harvest in numbers of fish.
Download or read book Feeding Ecology of Juvenile Sockeye Salmon in Afognak Lake Alaska written by Natura Richardson and published by . This book was released on 2016 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Much attention has been given to juvenile Sockeye Salmon (Oncorhynchus nerka) ecology with particular focus on pelagic food webs in deep nursery lakes. In contrast, this study took place at Afognak Lake, Alaska, to better understand juvenile Sockeye Salmon foraging ecology, potential consumer interactions, and metabolic opportunities and constraints in a shallow nursery lake. I collected fish every two weeks from Afognak Lake from May through August, 2013. I described ontogenetic and temporal variation in the diets of juvenile Sockeye Salmon and a potential competitor, adult Threespine Stickleback (Gasterosteus aculeatus). Notably, this study revealed that adult aquatic insects are an important prey item for lake rearing juveniles. Threespine Stickleback diets showed some overlap with diets of juvenile Sockeye Salmon; however, significant differences in diet composition suggest that Sockeye Salmon and Threespine Stickleback partition prey and habitat resources. I then used my field-derived temperature, demographic, and diet data as inputs to a bioenergetics model to estimate summer consumption rate and growth efficiency of juvenile Sockeye Salmon from Afognak Lake across a range of foraging scenarios. Consumption rate was greater and mean growth efficiency was lower for all littoral-use scenarios relative to pelagic-use scenarios. Further, daily consumption was lowest and mean growth efficiency was highest for model scenarios in which insects were a dominant component of the diet relative to scenarios in which zooplankton were the dominant prey. My findings highlight the importance of benthic-pelagic coupling in Sockeye Salmon nursery lakes and the potential for juveniles to navigate trade-offs between energy acquisition and thermal conditions across lake habitats.
Download or read book The Development of a Natural Sockeye Salmon Run Into Virginia Lake Southeast Alaska written by Jim A. Edmundson and published by . This book was released on 1991 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Distribution and Run Timing of Hugh Smith Lake Sockeye Salmon in the District 101 Commercial Net Fisheries of Southern Southeast Alaska 2004 to 2006 written by Steven C. Heinl and published by . This book was released on 2007 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Enhancement of Sockeye Salmon in Auke Lake Juneau Alaska 1986 1989 written by Sidney G. Taylor and published by . This book was released on 1992 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of a stocking program in which sockeye salmon (Oncorhynchus nerka) fry reared in the Auke Creek hatchery in southeastern Alaska near Juneau were released at various stages into Auke Lake during 1988, 1989 and 1990 and survival rates monitored.
