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Smolt Scale Characteristics And Yield Of Coho Salmon Oncorhynchus Kisutch Smolts And Adults From Porcupine Creek Southeastern Alaska
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Book Synopsis Smolt Scale Characteristics and Yield of Coho Salmon, Oncorhynchus Kisutch, Smolts and Adults from Porcupine Creek, Southeastern Alaska by : John F. Thedinga
Download or read book Smolt Scale Characteristics and Yield of Coho Salmon, Oncorhynchus Kisutch, Smolts and Adults from Porcupine Creek, Southeastern Alaska written by John F. Thedinga and published by . This book was released on 1985 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fishery Bulletin written by and published by . This book was released on 1988 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Canadian Journal of Zoology written by and published by . This book was released on 1993 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fish and Wildlife Relationships in Old-growth Forests by : William R. Meehan
Download or read book Fish and Wildlife Relationships in Old-growth Forests written by William R. Meehan and published by . This book was released on 1984 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Canadian Journal of Fisheries and Aquatic Sciences by :
Download or read book Canadian Journal of Fisheries and Aquatic Sciences written by and published by . This book was released on 1996 with total page 722 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Smolt Length and Emigration Timing on Marine Survival and Age at Maturity of Wild Coho Salmon (Oncorhynchus Kisutch) at Auke Creek, Juneau Alaska by : Judith Lynn Lum
Download or read book Effects of Smolt Length and Emigration Timing on Marine Survival and Age at Maturity of Wild Coho Salmon (Oncorhynchus Kisutch) at Auke Creek, Juneau Alaska written by Judith Lynn Lum and published by . This book was released on 2003 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Coho salmon Oncorhynchus kisutch smolt were collected during the 1993-1997 emigrations at Auke Creek near Juneau, Alaska. Each day emigrants were separated into four size categories: small 90 mm), medium (90 - 110 mm), large (111 - 125 mm), and extra large ( 125 mm), tagged with a sequentially coded-wire tag, and released at tidewater. Tags from returning adults and jacks were collected and decoded in 1993-1998. Most survivors originated from the large and extra large categories, 40.5% and 43.1%, respectively. Large smolts contributed 28.9% to smolt-to-jack returns, significantly less than the smolt-to-jack survival contributed by extra large smolts, 67.8%. Smolt year, emigration date, and smolt length were significant in determining the length of returning jacks. In the 1993 and 1997 smolt years, significantly smaller returning adults originated from smolts that migrated later. Larger smolts produced significantly larger returning adults in all smolt years except 1994"--Leaf iii.
Book Synopsis Production of Coho Salmon from the 2008 Smolt Emigration from Chuck Creek in Southeast Alaska by : Steven J. McCurdy
Download or read book Production of Coho Salmon from the 2008 Smolt Emigration from Chuck Creek in Southeast Alaska written by Steven J. McCurdy and published by . This book was released on 2010 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary purpose of this study was to estimate smolt production, marine survival, exploitation rates, and escapements of coho salmon Oncorhynchus kisutch from the 2008 smolt emigration from the Chuck Creek watershed in Southeast Alaska. Additional objectives were to determine if smolt size and the date of smolt emigration influenced survival to maturity, and/or the date of return to freshwater (of jacks).
Book Synopsis Production of Coho Salmon from the 2007 Smolt Emigration from Chuck Creek in Southeast Alaska by : Steven J. McCurdy
Download or read book Production of Coho Salmon from the 2007 Smolt Emigration from Chuck Creek in Southeast Alaska written by Steven J. McCurdy and published by . This book was released on 2010 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary purpose of this study was to estimate smolt production, marine survival, exploitation rates, and escapements of coho salmon Oncorhynchus kisutch from the 2007 smolt emigration from the Chuck Creek watershed in Southeast Alaska. Additional objectives were to determine if smolt size and the date of smolt emigration influenced survival to maturity, and/or the date of return to fresh water (of jack salmon).
Author :H. T. Bilton Publisher :Nanaimo, B.C. : Department of Fisheries and the Environment, Pacific Biological Station ISBN 13 : Total Pages :82 pages Book Rating :4.:/5 (318 download)
Book Synopsis Returns of Adult Coho Salmon in Relation to Mean Size and Time at Release of Juveniles by : H. T. Bilton
Download or read book Returns of Adult Coho Salmon in Relation to Mean Size and Time at Release of Juveniles written by H. T. Bilton and published by Nanaimo, B.C. : Department of Fisheries and the Environment, Pacific Biological Station. This book was released on 1978 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Production of Coho Salmon from the 2009 Smolt Emigration from Chuck Creek in Southeast Alaska by : Steven J. McCurdy
Download or read book Production of Coho Salmon from the 2009 Smolt Emigration from Chuck Creek in Southeast Alaska written by Steven J. McCurdy and published by . This book was released on 2012 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary purpose of this study was to estimate smolt production, marine survival, exploitation rates, and escapements of coho salmon (Oncorhynchus kisutch) from the 2009 smolt emigration from the Chuck Creek watershed in Southeast Alaska. Additional objectives were to determine if smolt size and the date of smolt emigration influenced survival and age-at-maturity.
Book Synopsis Factors Affecting the Smolt Yield of Coho Salmon (Oncorhynchus Kisutch) in Three Oregon Streams by : Ned Jay Knight
Download or read book Factors Affecting the Smolt Yield of Coho Salmon (Oncorhynchus Kisutch) in Three Oregon Streams written by Ned Jay Knight and published by . This book was released on 1979 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: Data from the coho salmon migration were examined from three streams of the Alsea Watershed Study, conducted on tributaries to Drift Creek, Oregon, from 1959 through 1973. With the migration season defined as November 1 through May 31, the mean seasonal smolt count was 2022 fish in Deer Creek, 665 in Flynn Creek, and 277 in Needle Branch. A general decline in numbers in the later years of the study was countered by a significant increase in mean length. The peak migration time was in late March and early April in each stream. A general approach to correlate physical and biological factors to the total seasonal smolt count in each stream through single regression analyses was mostly unsuccessful. A hypothesized positive relationship between summer discharge and smolt yield could not be supported, either by using mean monthly or mean maximum flows. A negative relationship between winter discharge and smolt count was hypothesized, due to increased mortality from higher flows. This hypothesis was supported by significant regressions that included mean January flows and mean highest flows. Summer temperatures (mean monthly and mean maximum for 7, 15, and 30 days) showed little correlation with the smolt output. Suspended sediment concentrations were negatively correlated with the number of smolts, as expected from the close relationship between sediment and streamflow. September biomass of juveniles in Flynn Creek was significantly related to the smolt output, though the relationships were weaker in the other two streams. The number of spawning females was positively related to the resulting smolt count but the correlations were not significant. Cutthroat trout biomass showed very little correlation with the coho smolt output. Combinations of variables in multiple regression analyses proved generally more successful than the single correlations with smolt count, but interpretation of the variables that proved significant was not always clear. For Deer Creek, 63.9% of the variability in smolt yield could be explained by the regression with September biomass and mean May maximum temperatures. September biomass, January discharge, and mean sediment concentration accounted for 80.7% of the variability in Flynn Creek smolt output. Only 53.8% of the variability in Needle Branch smolt count could be adequately explained (from January discharge and timing of the mean lowest discharge for 15 days), perhaps due to changes in stream variables following logging. When total smolt weight (biomass) was used as the dependent variable instead of count, only the Flynn Creek regression was significant (R2=0.888, with September biomass, mean lowest discharge for 15 days, and spawning female count). It is evident from these analyses that the juvenile populations in each stream have different relationships with various physical and biological factors. Other studies have shown strong positive relationships between commercial catch of coho salmon off Oregon and Washington and streamflow two years previously, corresponding to the freshwater residence period of the juveniles. In this study, however, negative relationships between winter discharge and smolt output were found. It seems that this negative correlation is masked by downstream, estuary, or ocean factors that are inherent in the relationships between catch and flow.
Book Synopsis Coho Salmon Smolt Production, Adult Harvest, and Escapement from Jordan and Duck Creeks, Southeast Alaska, 2002-2003 by : Judith Lynn Lum
Download or read book Coho Salmon Smolt Production, Adult Harvest, and Escapement from Jordan and Duck Creeks, Southeast Alaska, 2002-2003 written by Judith Lynn Lum and published by . This book was released on 2007 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study was to determine smolt production and estimate the marine survival, exploitation rates, and harvest of Jordan and Duck Creek coho salmon, Oncorhynchus kisutch.
Book Synopsis Coho Salmon Smolt Production, Adult Harvest, and Escapement from Jordan and Duck Creeks, Southeast Alaska, 2003-2005 by : Ryan Jordan Briscoe
Download or read book Coho Salmon Smolt Production, Adult Harvest, and Escapement from Jordan and Duck Creeks, Southeast Alaska, 2003-2005 written by Ryan Jordan Briscoe and published by . This book was released on 2008 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study was to determine smolt production and estimate the marine survival, exploitation rates, and harvest of Jordan and Duck Creek coho salmon, Oncorhynchus kisutch.
Book Synopsis Production of Coho Salmon from the 2005 Smolt Emigration from Chuck Creek in Southeast Alaska by : Steven J. McCurdy
Download or read book Production of Coho Salmon from the 2005 Smolt Emigration from Chuck Creek in Southeast Alaska written by Steven J. McCurdy and published by . This book was released on 2008 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary purpose of this study was to estimate smolt production, marine survival, exploitation rates, and escapements of coho salmon, Oncorhynchus kisutch, from the 2005 smolt emigration from the Chuck Creek watershed in Southeast Alaska. Additional objectives were to determine if the date of smolt emigration influenced survival to maturity, and/or the date of return to freshwater (of jacks).
Book Synopsis Coho Salmon Smolt Abundance, Harvest, and Escapement at Cottonwood Creek During 1999-2001 by : Thomas B. Namtvedt
Download or read book Coho Salmon Smolt Abundance, Harvest, and Escapement at Cottonwood Creek During 1999-2001 written by Thomas B. Namtvedt and published by . This book was released on 2017 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1999 and 2000, a coded-wire-tagging (CWT) project was conducted on coho salmon (Oncorhynchus kisutch) smolt at Cottonwood Creek near Wasilla, Alaska. An estimated 63.6% and 77.5% of coho salmon smolt were counted, injected with CWTs, and marked by clipping the adipose fin in 1999 and 2000, respectively. Estimates of the total smolt outmigration at the Cottonwood Creek weir were 53,651 (SE 1,021) in 1999 and 51,254 (SE 462) in 2000. In 2000 and 2001, returning tagged adult coho salmon were recovered in gillnet fisheries and from sport anglers, and were censused at the Cottonwood Creek weir. Based on CWT recoveries in 2000, an estimated 643 (SE 61) Cottonwood Creek coho salmon were caught in the drift gillnet fishery, 34 (SE 10) in the Central District Eastside set gillnet fishery, 791 (SE 28) in the Northern District set gillnet fishery, and 282 (SE 143) by sport anglers. During 2001, an estimated 160 (SE 25) Cottonwood Creek coho salmon were caught in the drift gillnet fishery, 40 (SE 28) in the Central District Eastside set gillnet fishery, 608 (SE 22) in the Northern District set gillnet fishery, and 647 (SE 204) by sport anglers. The estimated Cottonwood Creek coho salmon adult returns were 3,646 (SE 158) and 4,980 (SE 209) for 2000 and 2001, respectively. In 2000, the estimated commercial and sport exploitation rates were 40.3% (SE 1.9%) and 7.7% (SE 3.6%), respectively. In 2001, these were 16.2% (SE 1.0%) and 13.0% (SE 3.6%), respectively. The estimated marine survival rate of emigrating coho salmon smolt was 6.8% (SE 0.3%) in 1999 and 9.7% (SE 0.4%) in 2000. CWT recovery data suggest that marine survival was positively related to smolt length and earlier emigration (tagging). Sockeye salmon (O. nerka) smolt and adults were also counted and sampled at the Cottonwood Creek weir.
Book Synopsis Effects of Several Metals on Smolting of Coho Salmon by : Harold W. Lorz
Download or read book Effects of Several Metals on Smolting of Coho Salmon written by Harold W. Lorz and published by . This book was released on 1978 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Coho Salmon Smolt Production, Adult Harvest, and Escapement in Jordan and Duck Creeks, Southeast Alaska, 2005-2006 by : Carol L. Coyle
Download or read book Coho Salmon Smolt Production, Adult Harvest, and Escapement in Jordan and Duck Creeks, Southeast Alaska, 2005-2006 written by Carol L. Coyle and published by . This book was released on 2009 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study was to determine smolt production and estimate the marine survival, exploitation rates, and harvest of coho salmon, Oncorhynchus kisutch, in Jordan and Duck Creeks near Juneau, Alaska in 2005-2006.