Download or read book Steelhead Studies from the Situk River in Southeast Alaska 2009 2011 written by Brian Marston and published by . This book was released on 2016 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: As a continuation of a monitoring project begun in 1994, a bipod and picket weir was used to count and sample steelhead Oncorhynchus mykiss kelts emigrating from the Situk River in Southeast Alaska from 2009 to 2011. Counts were 7,302, 5,335, and 7,458, emigrating kelts for 2009-2011 respectively. The 2009-2011 counts were below the long term (18 years: 1994-2011) average of 8,487 (-21%), and represent a 60% drop off the recent peak counts (10-15,000) seen within the last decade, but they were similar or above the previous low counts recorded historically (

Download or read book Steelhead Studies from the Situk River in Southeast Alaska 2002 2008 written by Brian Marston and published by . This book was released on 2012 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Southeast Alaska Steelhead Studies 1997 written by Robert E. Johnson and published by . This book was released on 1998 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Southeast Alaska Steelhead Studies 2000 written by Robert E. Johnson and published by . This book was released on 2001 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Southeast Alaska Steelhead Studies 2001 written by Robert E. Johnson and published by . This book was released on 2003 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Southeast Alaska Steelhead Studies 1999 written by Robert E. Johnson and published by . This book was released on 2000 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Southeast Alaska Steelhead Studies 1998 written by Robert E. Johnson and published by . This book was released on 1999 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Steelhead Studies Situk River 1989 written by Robert E. Johnson and published by . This book was released on 1990 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study of numbers of steelhead (Oncorhynchus mykiss) in the Situk River near Yakutat in southeast Alaska uses both visual and recording fathometer (sonar) methods.

Download or read book Situk River Steelhead Studies 1990 written by Robert E. Johnson and published by . This book was released on 1991 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study used recording fathometer (sonar) and visual observations to count the early portion of the spring steelhead (Oncorhynchus mykiss) immigration to the Situk River near Yakutat in southeast Alaska.

Download or read book Biological Characteristics and Population Status of Steelhead Oncorhynchus Mykiss in Southeast Alaska written by Samuel Clark Lohr and published by . This book was released on 1999 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Steelhead Usable Habitat Area in Southeast Alaska written by Kercia Schroeder and published by . This book was released on 2012 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: To better understand steelhead (Oncorhynchus mykiss) populations and habitat capability in Southeast Alaska, stream habitat and fish use surveys were conducted in Ratz Creek watershed on Prince of Wales Island, Southeast Alaska, from 2009 to 2011. The overall goal of this project was to develop a model to assess the carrying capacity of steelhead in Southeast Alaska streams, based on the relationship between usable habitat area and steelhead production. Ratz Creek was the fourth watershed out of eight to be surveyed for this project. During habitat surveys, the stream network was mapped and individual stream reaches were classified according to fluvial process group and channel type. Several stream reach characteristics were measured, including reach length and channel bed width. Large woody debris and macro-pools were counted to characterize the available habitat. These data have been found to be important indicators of fish habitat in other streams occupied by salmonids, and were used to describe existing conditions of the stream reaches surveyed for this project. Snorkel surveys and minnow traps were used during fish use surveys to identify stream reaches occupied by steelhead. When steelhead were observed in a reach, the channel bed width and reach length were multiplied together to estimate steelhead usable habitat area for that reach. Adult steelhead occupied a total of 10 stream reaches, including reaches in the mainstem and in a significant tributary stream, resulting in a total adult usable habitat area of 9.46 ha. In addition to the reaches occupied by adults, juvenile steelhead were observed in 10 additional reaches, for a combined total of 12.52 ha of usable habitat area. Existing production data for Ratz Creek were used to calculate an estimated 45 adults/ha and 126 smolts/ha of total usable habitat area.

Download or read book Steelhead Trout Production Studies at Sitkoh Creek Alaska 2003 2009 and 2009 Final Report written by David Champlain Love and published by . This book was released on 2012 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discusses the need for life history information on steelhead Oncorhynchus mykiss in Southeast Alaska, which prompted a multi-year study, whereby steelhead adults and smolts were counted through a weir on Sitkoh Creek each spring from April-June, 2003-2009. The ultimate goal of this project was to estimate demographic parameters necessary for describing spawner-recruit relationships such as the number of steelhead smolt produced per spawner.

Download or read book Situk River Steelhead Trout Studies 1994 written by Robert E. Johnson and published by . This book was released on 1996 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Early Marine Growth Patterns of Situk River Steelhead Oncorhynchus Mykiss written by Matthew R. Catterson and published by . This book was released on 2017 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: Steelhead Oncorhynchus mykiss exhibit complex life-history patterns described by variable freshwater and marine residency periods, maturation patterns, and reproductive characteristics. Over 300 small populations of Steelhead are present in Southeast Alaska, and similar trends in abundance among these populations suggest the influence of population-regulating forces operating on a regional scale. The Situk River, near Yakutat, Alaska, supports the largest known population of Steelhead in Alaska. Stock assessment studies on this river have collected the longest set of biological data and scale samples for Steelhead in the state. For this study, retrospective scale pattern analysis of samples from Situk River Steelhead was synthesized with regional abundance information to investigate patterns in early marine growth among different life-history and demographic groups, as well as to explore linkages between growth, abundance, and marine environmental variables. Positive correlations were identified between freshwater growth, first ocean-year growth, and adult length, while first ocean-year growth was negatively correlated with second ocean-year growth. Early maturing Steelhead were found to have increased first ocean-year growth and reduced adult length relative to later maturing Steelhead, confirming connections between growth and maturation. Correlations in abundance among Southeast Alaska Steelhead populations suggest that marine and climatic drivers may impact these populations in a regionally coherent manner. Correlations among patterns in abundance also varied along a distance gradient: populations located closer to the Situk River were more correlated with the Situk River than more distant populations. Positive relationships between Gulf of Alaska sea surface temperature, North Pacific Gyre Oscillation, and Situk River Steelhead abundance further supported the importance of climate-driven marine conditions to Steelhead productivity. While conservation concerns for Steelhead in Southeast Alaska are currently minimal, proactive investigations into life-history diversity and population linkages may become more relevant with increased marine ecosystem variability related to climate change.

Download or read book A Study of Cutthroat Steelhead in Southeast Alaska written by Alaska. Division of Sport Fish and published by . This book was released on 19?? with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Situk River Steelhead Trout Counts 1992 written by Brian J. Glynn and published by . This book was released on 1993 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Report of a count of steelhead trout (Oncorhynchus mykiss) obtained at a weir on the Situk River (southeastern Alaska near Yakutat) using a float survey. This 1992 count was the lowest recorded suggesting abundance of steelhead in the Situk River remains low.

Download or read book Incidental Harvest and Voluntary Release of Steelhead and Chinook Salmon in the Situk River Commercial Set Gill Net Fishery During 1990 written by Aloysius J. Didier and published by . This book was released on 1991 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of a survey of the commercial fishery for steelhead (Oncorhynchus mykiss), and chinook salmon (Oncorhynchus tshawytscha) in the Situk and Ahrnklin rivers near Yakutat in southeast Alaska.