Food of Alewives, Yellow Perch, Spottail Shiners, Trout-perch, and Slimy and Fourhorn Sculpins in Southeastern Lake Michigan
Food of Alewives, Yellow Perch, Spottail Shiners, Trout-perch, and Slimy and Fourhorn Sculpins in Southeastern Lake Michigan

Author: LaRue Wells

Publisher:

Published: 1980

Total Pages: 20

ISBN-13:

DOWNLOAD EBOOK

Stomachs of 1,064 alewives, 1,103 yellow perch, 246 spottail shiners, 288 trout-perch, 454 slimy sculpins, and 562 fourhorn sculpins from Lake Michigan were examined for food contents. Fish were sampled primarily from March to November and nearly all were caught at the bottom in the southeastern part of the lake near Saugatuck, Michigan. Pontoporeia was the most commonly reprented food item in the stomach contents of the fish examined, with immature midges, Mysis (a type of freshwater shrimp), copepods, cladocerans, fingernail clams and crayfish also being represented. Different species consumed different proportions of foods. Zooplankton was the principle food of alewives and spottail shiners, but was also consumed in small quantities by yellow perch and trout perch. Mysis was important to fourhorn sculpins, in addition to Pontoporeia. Immature midges were a major portion of spottail shiners and trout perch, also being consumed by alewives. Fish were often the most important food of yellow perch in the largest size category. Crayfish were a sizable portion of the diet of yellow perch on rocky bottoms, but sparingly on smooth bottoms. Spottail shiners also ate substantial numbers of fingernail clams.

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

Author:

Publisher:

Published: 2001

Total Pages:

ISBN-13:

DOWNLOAD EBOOK

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.

GIS and Environmental Modeling
GIS and Environmental Modeling

Author: Michael F. Goodchild

Publisher: John Wiley & Sons

Published: 1996-09-30

Total Pages: 536

ISBN-13: 9780470236772

DOWNLOAD EBOOK

GIS and Environmental Modeling: Progress and Research Issues Michael F. Goodchild, Louis T. Steyaert, Bradley O. Parks, Carol Johnston, David Maidment, Michael Crane, and Sandi Glendinning, Editors With growing pressure on natural resources and landscapes there is an increasing need to predict the consequences of any changes to the environment. Modelling plays an important role in this by helping our understanding of the environment and by forecasting likely impacts. In recent years moves have been made to link models to Geographical Information Systems to provide a means of analysing changes over an area as well as over time. GIS and Environmental Modeling explores the progress made to date in integrating these two software systems. Approaches to the subject are made from theoretical, technical as well as data stand points. The existing capabilities of current systems are described along with important issues of data availability, accuracy and error. Various case studies illustrate this and highlight the common concepts and issues that exist between researchers in different environmental fields. The future needs and prospects for integrating GIS and environmental models are also explored with developments in both data handling and modelling discussed. The book brings together the knowledge and experience of over 100 researchers from academic, commercial and government backgrounds who work in a wide range of disciplines. The themes followed in the text provide a fund of knowledge and guidance for those involved in environmental modelling and GIS. The book is easily accessible for readers with a basic GIS knowledge and the ideas and results of the research are clearly illustrated with both colour and black and white graphics.

State of Lake Michigan
State of Lake Michigan

Author: T. Edsall

Publisher: Aquatic Ecosystem Health & Mgmt Soc

Published: 2005

Total Pages: 668

ISBN-13:

DOWNLOAD EBOOK

This volume, cataloging and analyzing the current science on the state of Lake Michigan, is an important part of Great Lakes recovering science. It carries forward the singular contribution that the binational Great Lakes scientific community has made not only to restoring the Great Lakes but also to the world's body of knowledge about large lake ecology, the long-range transport of pollutants, and the importance of habitat in ensuring ecosystem health.

Fisheries in a Changing Climate
Fisheries in a Changing Climate

Author: Nature A. McGinn

Publisher:

Published: 2002

Total Pages: 328

ISBN-13:

DOWNLOAD EBOOK

Introduction / Nature A. McGinnForeword / Ronald C. BairdOverview of the Symposium / Brian J. Shuter, Robert F. Carline and Nature A. McGinnSignals from Ice Cover Trends and Variability / John J. MagnusonGlobal Warming Influences on Water Levels, Ice, and Chemical and Biological Cycles in Lakes: Some Examples / Brent M. LofgrenImpacts of Sea Level Rise on Tidal Wetlands and Shallow-Water Habitats: A Case Study from Chesapeake Bay / J. Court Stevenson, Michael S. Kearney and Evamaria W. KochEffects of Temperature, Global Extremes, and Climate Change on Year-Class Production of Warmwater, Coolwater, and Coldwater Fishes in the Great Lakes Basin / John M. CasselmanClimate Change: Implications for Fish Growth Performance in the Great Lakes / Stephen B. Brandt, Doran M. Mason, Michael J. McCormick, Brent Lofgren, Timothy S. Hunter and Jeffrey A. TylerClimate Change, Freshwater Fish, and Fisheries: Case Studies from Ontario and Their Use in Assessing Potential Impacts / Brian J. Shuter, Charles K. Minns and Nigel LesterChanging Fish Biodiversity: Predicting the Loss of Cyprind Biodiversity Due to Global Climate Change / Donald A. Jackson and Nicholas E. MandrakUsing Current Biogeographic Limits to Predict Fish Distributions Following Climate Change / Frank J. RahelA Review of the Role of Climate Variability in the Decline of Northern Cod / K. F. DrinkwaterInfluence of Rising Sea Temperature on Commercial Bivalve Species of the U.S. Atlantic Coast / James R. Weinberg, Thomas G. Dahlgren and Kenneth M. HalanychReef Faunal Response to Warming Middle U.S. Continental Shelf Waters / R. O. Parker, Jr. and R. L. DixonDecadal Oscillations and Regime Shifts, a Characterization of the Chesapeake Bay Marine Climate / Herbert M. AustinFuture Consequences of Climate Change for the Chesapeake Bay Ecosystem and Its Fisheries / Robert J. Wood, Donald F. Boesch and Victor S. KennedyPotential Consequences of Climate Change for the Fish Resources in the Mid-Atlantic Region / David G. MountainClimate Variability and Pacific Sardine Populations and Fisheries / G. A. McFarlane, P. E. Smith, T. R. Baumgartner and J. R. HunterDynamic Response of California Current Populations to Environmental Variability / Louis W. Botsford, Cathryn A. Lawrence, M. Forrest Hill, Alan Hastings and Kevin S. McCannEffects of Climate and Stock Size on the Productivity of Pacific Halibut / William G. Clark and Steven R. HareThe Role of Climate in the Past, Present, and Future of Pacific Salmon Fisheries off the West Coast of Canada / Richard J. Beamish and Donald J. NoakesCooperating with the Environment: Case Studies of Climate and Fisheries in the Northern California Current / John C. Field and Robert C. FrancisUncertainty in Scenarios of Human-Caused Climate Change / Nathan J. Mantua and Philip W. MoteA Future of Adapting to Climate Change and Variability / John J. MagnusonSymposium and Contributed Paper Session AbstractsReport from the Stakeholders? Forum on Fisheries and Climate ChangeBibliography of Climate Change-Related Papers in AFS Journals.