Download or read book Natural Reproduction and Recruitment of Chinook Salmon in the Salmon River NY written by Nathan Gail Smith and published by . This book was released on 2005 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Natural Reproduction and Recruitment of Chinook Salmon in the Salmon River New York An Application of Otolith Microstructure Analysis written by Nathan Gail Smith and published by . This book was released on 2005 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stocking of hatchery-reared Chinook salmon (Oncorhynchus tshawytscha) in Lake Ontario has led to the development of a sport fishery that provides high economic returns to local communities. Changes in habitat quality, including changes in flow associated with Federal Energy Regulatory Commission reauthorization protocols since the mid 1990s in the Salmon River, NY, may have led to increased natural reproduction in this river. Increases in natural production of Chinook in Lake Ontario could lead to changing management practices in the fishery. In order to measure wild reproduction I used known origin young-of-the-year (YOY) Chinook salmon from hatchery and wild sources as a baseline for separating these groups using otolith microstructure. Measuring 20 days growth from 300 mum inward toward the origin correctly classified 100% of known hatchery fish, and 89% of known wild fish. These measurements were used to determine the origin of Chinook salmon smolts caught in the nearshore of Lake Ontario adjacent to the Salmon River, NY in 2000 (85%) and 2001 (89%). I also evaluated the potential for carbon and oxygen stable isotopes in otoliths for differentiation of hatchery and wild YOY Chinook. Stable isotope methods show promise in separating hatchery and wild fish based on known-origin otoliths from 1999 and 2001, but further research is required before large scale application in Lake Ontario. In addition to sampling outmigrating smolts, I applied the 300 mum method to a sample of adults returning to the Salmon River from 2000-2002. Wild origin fish contributed between 10 and 25% of the returning adults for the 6 year classes 1995-2000. There was no time trend in the proportion of wild fish and therefore no evidence for an increase in natural production due to water flow changes in the Salmon River during the late 1990s. Because of the life history of Chinook salmon and time limitations of the study, I was unable to directly compare estimates of smolts from 2000-2001 with returning adults from those year classes, however my results for both YOY and adult Chinook indicate that natural reproduction may play a larger role in Lake Ontario than previously thought.
Download or read book Natural Reproduction and Spawning Site Characteristics of Chinook Salmon Oncorhynchus Tshawytscha in the Salmon River New York written by Dustin W. Everitt and published by . This book was released on 2006 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Food web constraints on Chinook salmon recruitment in a large Lake Michigan tributary written by Damon M. Krueger and published by . This book was released on 2010 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Natural reproduction of Chinook salmon now supplies half of all recruits to the Lake Michigan sport fishery but may vary greatly due to environmental variability and biotic interactions in tributary nursery areas. From 2004 to 2007, I evaluated the relative effect of predation by stocked sport fish species on Chinook salmon recruitment variability in the Muskegon River, a large Lake Michigan tributary. Together, walleye and brown trout annually consumed from 17 to 47% of available Chinook salmon parr. Although brown trout consumed large quantities of Chinook parr, I found that hatchery trout dominated walleye diets. Walleye were size-selective for small hatchery trout but prey size was independent of predator size. In general, walleye showed neutral selection for prey species although they positively selected for rainbow trout and selected against Chinook parr in some years. Brown trout consumed smaller-than-average Chinook salmon parr although prey size was also independent of predator size. Chinook parr were positively selected as prey by brown trout but only in April when parr were
Download or read book Fishery Bulletin written by and published by . This book was released on 1990 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2006 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spatial and Temporal Distribution of Wild and Hatchery Juvenile Chinook Salmon in Nearshore Lake Ontario written by Micah John Dean and published by . This book was released on 2002 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rearing of Chinook Salmon in Tributaries of the South Fork Salmon River Idaho written by William S. Platts and published by . This book was released on 1978 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Coastlines written by and published by . This book was released on 2002 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Potential for Natural Reproduction of Chinook Salmon in the Chippewa River Isabella County Michigan written by Dennis Jay Hamlin and published by . This book was released on 1993 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of Factors Influencing the Population Dynamics of Chinook Salmon Oncorhynchus Tshawytscha in Central California written by Robert Glenn Kope and published by . This book was released on 1987 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comprehensive Assessment and Monitoring Program CAMP written by and published by . This book was released on 1995 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Collected Reprints written by Southwest Fisheries Center (U.S.) and published by . This book was released on 1990 with total page 944 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Captive Rearing Program for Salmon River Chinook Salmon written by David Allan Venditti and published by . This book was released on 2003 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book New York Fish and Game Journal written by and published by . This book was released on 1981 with total page 984 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Collected Reprints written by and published by . This book was released on 1994 with total page 856 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book New Publications written by and published by . This book was released on 2002 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
