

; Virginia Polytechnic Institute and State University; 1986
; National Marine Fisheries Service Laboratory; 2000
Evolutionary Implications of Modern Anthropogenic Extinctions; Workshop; National Academy of Science-National Research Council; 1995
Using the Best Available Scientific Information in Fisheries; Workshop; National Academy of Science-National Research Council; 2003
Evaluating the Experimental Manipulation of Natural Plant Communities; Annual Meeting, 40th Annual AIBS Meeting Symposium ; Ecological Society of America; 1989
Coevolution of Physicochemical Processes and Biological Patterns in Salt Marshes; Biocomplexity Workshop ; National Science Foundation; 2002
Amphibian Population Biology; 63rd Annual Meeting Symposium; American Society of Ichthyologists and Herpetologists;
Symposium: Environmental Influences on Phenotypic Expression of Morphology and Life History Traits; 69th Annual Meeting, Symposium; American Society of Ichthyologists and Herpetologists; 1989
Ecological Morphology; 101st Annual Meeting, Symposium; American Society of Zoologists; 1990
Evolutionary Biology; Workshop ; National Aeronautics and Space Administration & American Museum of Natural History; 1999
Beyond Equilibrium in Population and Community Dynamics; Annual Meeting Symposium; Ecological Society of America;
Regulation and Relative Abundance of Plant and Animal Populations; Discussion Meeting; Royal Society of London; 1990
The Future of Comparative Developmental Physiology; Workshop; National Science Foundation; 2002
Evolutionary, Population, and Community Responses to Global Change; Conference ; National Science Foundation; 1991
Genetical Approaches to Ecological Problems; 35th Annual AIBS Meeting; Ecological Society of America/Society for the Study of Evolution; 1984
Evolutionary Physiology; Annual Meeting Symposium; Society for Integrative and Comparative Biology; 1998
Research Challenges for the Naturalist; Annual Meeting; American Society of Naturalists; 2002
; National Science Foundation Conference on Theoretical Ecology; National Science Foundation; 1986
; Plenary Lecture in Ecology; Second World Congress of Herpetology; 1994
Life History Evolution: Theories and Tests; Fifth, Symposium; International Congress of Ecology; 1990
Observation and Experiment in Studies of Variable Species Interactions; Annual Meeting, Vice-Presidential Symposium; American Society of Naturalists; 1994
; Duke University, Department of Botany; 1977
; Savannah River Ecology Laboratory, Population Genetics Lab; 1979
; University of Pennsylvania, Department of Biology; 1979
; Brown University, Division of Biology and Medicine; 1980
; University of Vermont, Department of Zoology; 1980
; University of Virginia, Department of Biology; 1980
; Florida State University, Department of Biological Science; 1980
; University of Virginia, Mountain Lake Biological Station; 1980
; Florida State University, Department of Curriculum and Instruction; 1981
; Florida State University, Department of Statistics; 1981
; Wakulla Springs Conference on Community Ecology; Florida State University;
; University of Florida, Department of Zoology; 1982
; George Mason University, Department of Biology;
; Vanderbilt University, Department of General Biology;
; University of Virginia, Mountain Lake Biological Station;
; Biochemistry Colloquium; Florida State University;
; Genetics Alumni Conference; Florida State University;
; University of Alabama, Department of Biology; 1983
; University of Pennsylvania, Department of Biology; 1984
; Academy of Natural Sciences of Philadelphia; 1984
; Distinguished Speaker Series ; University of Maryland, Department of Zoology; 1984
; Rutgers University, Department of Biological Sciences; 1984
; Clemson University, Department of Zoology; 1984
; Princeton University, Department of Biology; 1984
; University of Florida, Department of Botany;
; Organization for Tropical Studies, Costa Rica; 1986
; University of Chicago, Department of Biology; 1986
; University of California (Berkeley), Department of Zoology; 1986
; University of Virginia, Mountain Lake Biological Station; 1986
Ecology and Evolutionary Biology; University Lecture Series; Oregon State University; 1986
; State University of New York at Stony Brook, Department of Ecology and Evoluntionary Biology; 1986
; Cornell University, Section of Ecology and Systematics; 1986
; State University of New York College at Cortland, Department of Biological Sciences; 1986
; Savannah River Ecology Laboratory, Population Genetics Laboratory; 1986
; University of Georgia, Department of Molecular and Population Genetics; 1986
; Michigan State University, Kellogg Biological Station; 1986
; Sigma Xi Lecture; Eckerd College; 1986
Patterns in Field Biology; Symposium; Virginia Polytechnic Institute and State University; 1986
; University of Utah, Department of Biology; 1988
; Wesleyan University, Department of Biology; 1988
; University of North Dakota, Department of Biology; 1988
; University of Texas, Department of Zoology; 1988
; University of Maryland, Appalachian Environmental Laboratory; 1988
; Rutgers University, Department of Biological Sciences; 1988
; Princeton University, Department of Biology; 1988
Recent Trends in Modern Biology: From Communities to Genes; Symposium; Duke University, Department of Botany; 1988
; University of Tennessee, Department of Zoology; 1989
; Vanderbilt University, Department of General Biology; 1980
; Mississippi State University, Department of Biological Sciences; 1989
; University of Virginia, Mountain Lake Biological Station; 1989
; University of Kentucky, Department of Biological Sciences; 1989
Optimal Sizes of Eggs and Clutches; Round Table; First World Congress of Herpetology; 1989
; Ecology Seminar Series; University of California (Davis); 1990
; University of Florida, Department of Fisheries and Agriculture; 1990
; University of Virginia, Mountain Lake Biological Station; 1990
; University of Missouri, Division of Biological Sciences; 1990
; Archbold Biological Station; 1990
; McGill University, Department of Biology; 1990
; University of Houston, Department of Biology; 1991
; University of North Carolina, Department of Biology; 1991
; University of Miami, Department of Biology; 1991
; Florida International University, Department of Biology; 1991
; University of Zurich, Zoologisches Institute; 1991
; University of Basel, Zoologisches Institute; 1991
; University of Lausanne, Institute of Zoology and Animal Ecology; 1991
Ecology and Evolution of Plant Reproduction: New Approaches; Conference; National Science Foundation University of Georgia; 1991
; University of Chicago, Department of Evolutionary Biology; 1992
; University of Florida, Department of Zoology; 1992
; Brown University, Division of Biology and Medicine; 1992
; Savannah River Ecology Laboratory, Population Genetics Laboratory; 1992
A National Center for Ecological Synthesis; Workshop ; National Science Foundation; 1992
; Old Dominion University, Department of Biological Sciences; 1993
; Dartmouth College, Department of Biology; 1993
; University of North Carolina, Department of Biology; 1993
; University of South Carolina, Department of Biological Sciences; 1993
; University of California, Davis, Section of Ecology and Evolution; 1994
; Colorado State University, Department of Biology; 1994
; Michigan State University, Kellogg Biological Station; 1994
; University of Virginia, Mountain Lake Biological Station; 1994
; Harvard University, Department of Organismal and Evolutionary Biology; 1995
; University of Miami, Department of Biology; 1995
; Arizona State University, Department of Zoology; 1996
; Dartmouth College, Department of Biology; 1996
; Tulane University, Department of Ecology, Evolution, and Organismal Biology; 1996
; University of Pennsylvania, Department of Biology; 1997
Rapid Evolution in Interspecific Interactions; Workshop; National Center for Ecological Analysis and Synthesis; 1997
; Loyola University, Department of Biology; 1999
; University of Florida, Department of Zoology; 1999
; University of British Columbia, Department of Zoology; 2001
; Georgia Southern University, Department of Biological Sciences; 2001
; Florida State University, Department of Civil Engineering; 2001
; University of Toronto, Department of Zoology; 2001
; Duke University, Department of Biology; 2002
; Florida International University, Department of Biological Sciences; 2002
; University of Florida, Department of Wildlife; 2002
; University of Maryland-Baltimore County, Department of Biological Sciences; 2002
; Center for the Study of Population, Florida State University; 2003
; National Marine Fisheries Service Laboratory, Panama City; 2003
; Yale University, Department of Ecology and Evolutionary Biology; 2003
Symposium; Fourth Congress ; European Society for Evolutionary Biology; 1993
Ecology Toward the Year 2000; Symposium; Italian Ecological Society; 1992