Download or read book Effects of Commercial Fishing on an Unexploited Lake Whitefish Population in Michigan s Waters of Lake Superior 1983 1989 written by James W. Peck and published by . This book was released on 1994 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Institute for Fisheries Research Report Michigan Institute for Fisheries Research written by and published by . This book was released on 1994 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fisheries Research Report written by and published by . This book was released on 1995 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Canadian Journal of Fisheries and Aquatic Sciences written by and published by . This book was released on 2003 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Commercial and Sport Fisheries for Lake Whitefish in Michigan Waters of Lake Superior 1983 96 written by Richard G. Schorfhaar and published by . This book was released on 1997 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1996 with total page 924 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recent History and Management of the State licensed Commercial Fishery for Lake Whitefish in the Michigan Waters of Lake Michigan written by Ronald W. Rybicki and published by . This book was released on 1990 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Characteristics of a Population of Whitefish as Affected by Commercial Fishing in Red Lakes Minnesota written by John J. Peterka and published by . This book was released on 1964 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Whitefish Fishery of Lakes Huron and Michigan with Special Reference to the Deep trap net Fishery written by John Van Oosten and published by . This book was released on 1946 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fish and Wildlife Reference Service Newsletter written by and published by . This book was released on 1997 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physical and Ecological Effects of Waste Heat on Lake Michigan written by U.S. Fish and Wildlife Service and published by . This book was released on 1970 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lake Superior written by Michael J. Hansen and published by . This book was released on 1990 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Trophic Disruption Effects on the Diet and Condition of Lake Whitefish written by Kelly-Anne Fagan and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Recently, the growth and condition of Lake Whitefish (Coregonus clupeaformis), an important commercial fishery commodity, has declined in some areas of the Great Lakes. As Lake Whitefish are benthic feeders, historically the bulk of their diet was made up of the energy rich Diporeia hoyi, an amphipod whose abundances declined concurrently with reductions in Lake Whitefish growth and condition. Lake Whitefish populations from lakes Michigan, Erie and Superior have been used to determine whether there is a plausible link between the declines in Lake Whitefish condition and Diporeia abundance as indicated by stable isotope analysis, dietary and condition indices for Lake Whitefish. The first study was Lake Michigan specific and tested the hypothesis that condition, in terms of relative weight, percent lipid and docosahexaenoic acid (DHA), improved as the proportion of high quality prey (e.g., Diporeia) in the diet increased. Samples of spawning whitefish from four regions (northwest, Naubinway, Elk Rapids and southeast) around Lake Michigan had distinct mean carbon and nitrogen isotope signatures. The signatures indicated Lake Whitefish may be using a variety of prey items, especially the Naubinway population where fish occupy the largest isotopic niche space. Relative weight was significantly higher in the southeast and lower for all northern regions. The mean measured lipid from Lake Whitefish dorsal skinless muscle biopsies was highest for northwest region fish. DHA was significantly different among studied regions, with higher mean values in Elk Rapids and the northwest. No linear relationships between stable isotope measures and condition metrics were found. These results suggest that Lake Whitefish are coping with declining Diporeia abundances by feeding on alternate prey. Results do not substantiate the hypothesis of a relationship between condition and prey use, although Lake Whitefish from Elk Rapids and the northwest had high quality prey and good condition. The second study incorporated eight spawning populations around lakes Michigan, Erie and Superior to determine if there were differences in energy available to female Lake Whitefish. The hypotheses tested were three fold: (1) observed differences in growth and reproduction among populations were driven by energy availability, (2) populations with low energy reserves exhibit reproductive trade-offs and (3) high energy reserves are related to Diporeia consumption. Lake Whitefish from lakes Erie and Superior both displayed high growth and no trade-offs between egg size and number. Populations from Lake Michigan all had low investment in growth, significantly lower gonadosomatic index (GSI) and four of these populations displayed significant trade-offs between egg size and number. Growth and GSI tended to increase with mean total lipid stored in muscle and populations displaying reproductive trade-offs had significantly lower muscle lipid, however, these trends were not evident when using DHA as a measure of good nutrition. No relationship was evident between Diporeia consumption and populations with high muscle lipid stores. Overall, my results suggest that while changes in the availability of prey resources has had an effect on Lake Whitefish populations, the impact of declining abundances of Diporeia alone cannot explain the systemic changes in Lake Whitefish condition across the Great Lakes basin.
Download or read book Plans for Promoting the Whitefish Production of the Great Lakes written by Seth W. Downing and published by . This book was released on 1910 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Changes in Growth Condition Fecundity and Egg Lipid Content of Lake Whitefish in the Upper Great Lakes Between 1986 87 and 2003 05 written by Jud Fisher Kratzer and published by . This book was released on 2006 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Population Dynamics and Stock Differentiation of Lake Whitefish Coregonus Clupeaformis in Grand Traverse Bay Lake Michigan written by Mark William Prout and published by . This book was released on 1989 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Increasing the Economic Use of Upper Michigan s Commercial Fishery written by Michigan State University. Department of Fisheries and Wildlife and published by . This book was released on 1975 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
