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Book Food Web Interactions of Larval Yellow Perch Perca Flavescens in Lake Michigan Implications for Recruitment

Download or read book Food Web Interactions of Larval Yellow Perch Perca Flavescens in Lake Michigan Implications for Recruitment written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Variability in annual recruitment for many fishes is correlated with survival during the larval phase. Yellow perch in Lake Michigan have experienced sustained recruitment failure since 1990 and this has been blamed on low larval survival. Direct examination of factors important to larval yellow perch survival in Lake Michigan is complicated by the large size of the lake (52,000 km2) and the short length of the pelagic larval period (30-40 days). Individual-based modeling is a valuable indirect method for assessing the importance of multiple factors to larval survival. I used an individual-based modeling approach combined with field data collection to test four hypotheses regarding factors limiting survival of larval yellow perch in Lake Michigan. I tested whether larval survival is limited by prey community composition, size-selective predation, advection of larvae into offshore habitat or an interaction of these factors. I sampled larval and zooplankton abundance in Lake Michigan along a transect from 1 - 32 km from shore in 2000 and 2001. I conducted laboratory experiments to quantify larval vulnerability to predation by three typical predators as a function of both predator and prey size. I also conducted laboratory experiments to quantify larval selectivity for different zooplankton prey as a function of larval size and prey community composition. I used the results of these experiments to develop an individual-based model specifically to describe growth and survival of larval yellow perch. Field data suggest that larval yellow perch are being transported from the nearshore to the offshore zone of Lake Michigan, but the timing of this transport varies between years. Model simulations in which the offshore prey community and the timing of larval advection were both varied suggested that larval survival will be highest in years when advection occurs within two weeks of peak hatch, allowing larvae to exploit offshore prey resources early during ontogeny. The.

Book Spatio temporal Dynamics of Yellow Perch alewife Interactions in Lake Michigan

Download or read book Spatio temporal Dynamics of Yellow Perch alewife Interactions in Lake Michigan written by Matthew P. Balge and published by . This book was released on 2003 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Predicting Survival of Young of year Yellow Perch in Lake Michigan

Download or read book Predicting Survival of Young of year Yellow Perch in Lake Michigan written by R. A. Herendeen and published by . This book was released on 1992 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Food Web Interactions of Larval Yellow Perch Perca Flavescens in Lake Michigan

Download or read book Food Web Interactions of Larval Yellow Perch Perca Flavescens in Lake Michigan written by Richard Stewart Fulford and published by . This book was released on 2003 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keywords: system-size, individual-based model, foraging, predation, perch, larvae.

Book Zooplankton of the Great Lakes

Download or read book Zooplankton of the Great Lakes written by Mary D. Balcer and published by Univ of Wisconsin Press. This book was released on 1984 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: Researchers, instructors, and students will appreciate this compilation of detailed information on the crustacean zooplankton of the Great Lakes. The authors have gathered data from more than three hundred sources and organized into a useful laboratory manual. The taxonomic keys are easy to use, suitable for both classroom and laboratory identifications. Detailed line drawings are provided to help confirm the identification of the major species. Zoologists, limnologists, hydrobiologists, fish ecologists, and those who study or monitor water quality will welcome this dependable new identification tool. A concise summary of pertinent information on the ecology of these zooplankton is provided in the main body of the text. A check-list of all species reported from each of the Great Lakes and notes on the distribution and abundance of more than a hundred species were compiled from an extensive search of existing literature. In addition, the authors collected samples from several locations on Lake Superior, in order to provide information on the abundance and life histories of the major crustacean species.

Book Program and Abstracts

Download or read book Program and Abstracts written by and published by . This book was released on 2003 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Factors Affecting Feeding Survival and Growth of Larval and Early Juvenile Yellow Perch perca Flavescens Mitchill

Download or read book Factors Affecting Feeding Survival and Growth of Larval and Early Juvenile Yellow Perch perca Flavescens Mitchill written by Jeffrey Maynard Hinshaw and published by . This book was released on 1986 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Spatial and Temporal Variability in Post larval Yellow Perch Density

Download or read book Spatial and Temporal Variability in Post larval Yellow Perch Density written by Steve Hauschildt and published by . This book was released on 2019 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Yellow Perch Perca flavescens are important as forage for other species and for sport fishing in many northern lakes. However, estimating post-larval Yellow Perch populations can be difficult because of many environmental factors that cause unexplained variation. The objective of this study was to help reduce unexplained variation by determining a post-larval Yellow Perch population density estimate on Blackduck Lake, MN, provide guidance to help dete1mine the number of trawls required for trawling-based recruitment indices to achieve varying levels of precision, and test for the effects of wind speed and direction on post-larval Yellow Perch spatial variability. This study estimated a density of 0.45 fish/m3 (0.58 SD) during the sampling period (26 Jun - 07 Jul 2017). It was determined that between 10-15 trawls produced a precise density estimate; however, trawls should be taken over multiple days in varying wind speeds to avoid over/under estimation. Trawling should also be performed in-line with wind direction to ensure non-bias estimates are calculated from both upwind and downwind sectors. This study determined wind speed and direction had a significant influence on the distribution of post-larval Yellow Perch, as more fish were caught in the downwind sector until winds reached 15 kmph. At 15 kmph, fish densities were equal in the upwind and downwind sectors of the lake. Wind did not have a significant influence though on how post-larval Yellow Perch were distributed by total length. During high wind events, more fish were found in the upwind sector of the lake, suggesting that post¬larval fish are being moved laterally out of non-towable areas. From the results of this study it appears Yellow Perch must continually relocate back into shallow areas after each high wind event moves them out of the non-towable areas, until they are strong enough to resist the wind."-Abstract.

Book An Evaluation of Variables and Potential Management Strategies Influencing the Commercial Harvest of Yellow Perch Perca F l a v e s c e n s on Southern Green Bay Lake Michigan

Download or read book An Evaluation of Variables and Potential Management Strategies Influencing the Commercial Harvest of Yellow Perch Perca F l a v e s c e n s on Southern Green Bay Lake Michigan written by David M. Griffin and published by . This book was released on 1979 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: