DANIEL J. HOWARD, REGENTS PROFESSOR AND CHAIR OF BIOLOGY

 

Department of Biology

New Mexico State University

Las Cruces, NM 88003-8001

Phone: 505-646-4324

Fax:                 505-646-5665

Email:             dahoward@nmsu.edu

 

Daniel J. Howard—Research Statement

The research in my laboratory, which has been generously supported by NSF since 1986, is evolutionary in nature and hence multidisciplinary in approaches and techniques. The evolutionary process that attracts most of our attention is species formation, the process responsible for the diversity of life on earth. The major model system for our studies is the hybrid zone between the ground crickets, Allonemobius fasciatus and A. socius. Over the course of the past 20 years work in my laboratory has demonstrated that these species are strongly, but incompletely, isolated by conspecific sperm precedence. In other words, females mate with males of both species, but their eggs are fertilized, for the most part, by the sperm of conspecific males. This the only well-studied species pair that appears to be isolated by a single reproductive barrier rather than multiple barriers.  More recent work has demonstrated that sperm precedence evolves quickly between allopatric populations of A. socius.  We are now engaged in investigations of the genetics of sperm precedence through QTL and candidate gene approaches.  This work, in combination with detailed field studies of the hybrid zone, should provide one of the most detailed looks at a speciation event that has yet been put together. It has already provided us with important insights into the antagonistic nature of male-female interactions during fertilization and into the contingent nature of the relative fitnesses of hybrid and pure species genotypes in nature. Students entering the Laboratory of Ecological and Evolutionary Genetics are welcome to develop a project centering on Allonemobius or to develop a more independent study.

Daniel J. Howard—CV

 

Address:           Department of Biology

                        New Mexico State University

                        Las Cruces, NM  88003-0001

 

Telephone:        (505)646-4324 (Office)

                        (505)526-9492 (Home)

 

E-mail:  dahoward@nmsu.edu

 

 

ACADEMIC DEGREES:

 

B.Sc.                Biology, June 1977

                        Stanford University

                        Degree received with distinction and honors in

                        Biology.

 

M.Phil. Biology, May 1981

                        Yale University

 

Ph.D.               Biology, December 1982

                        Yale University

                        Dissertation Advisor:  Richard G. Harrison

Title of Dissertation:  Speciation and Coexistence in a Group of Closely Related Ground Crickets.

 

 

POSTDOCTORAL WORK:

 

The role of bacterial symbionts in host race formation of obligate insect frugivores.  With Guy L. Bush, Department of Zoology, Michigan State University, East Lansing, Michigan, 1982-1985.

 

 


ACADEMIC JOBS:

 

Curator of Zoology, Museum of Northern Arizona, 1985-1988.

 

Adjunct Assistant Professor of Biology, Northern Arizona University, 1985-1988.

 

Assistant Director for Research, Museum of Northern Arizona, 1986-1988.  I was responsible for 30 research personnel working in the Departments of Biology, Geology, and Anthropology.  I was successful in this position, but dissatisfied because the position did not provide me with enough time to do research.  Therefore, I left the Museum and accepted a position as assistant professor of biology at New Mexico State University.

 

Assistant Professor of Biology, New Mexico State University, 1988-1994.

 

Associate Professor of Biology, New Mexico State University, 1994-1999.

 

Director, Laboratory of Ecological and Evolutionary Genetics, New Mexico State University, 1994-present.  I established this common use laboratory with four co-principal investigators using $300,000 in funding provided by the National Science Foundation and New Mexico State University.

 

Professor of  Biology, New Mexico State University, 1999-Present.

 

Director, Institute of Natural Resource Analysis and Management (INRAM), 2001-2003.  This is a statewide institute that focuses on biodiversity, hydrology, and forest conservation issues with cooperating PIs from University of New Mexico, Eastern New Mexico University, Western New Mexico University, New Mexico Highlands University, and Los Alamos National Laboratory.  The institute was originally funded by a three million dollar grant from NSF and two million dollars from participating universities as part of New Mexico EPSCoR.  I led the statewide effort to bring in the funding and was named the first director of the Institute.

 

Chair of Department of Biology, New Mexico State University, 2003-Present.  I stepped down as Director of INRAM to become Head of the Department of Biology at NMSU in the summer of 2003.  The Department of Biology has 22 faculty members, about 40 exempt and non-exempt staff, 74 graduate students, and 450 undergraduate students.  Total research and development funding in the Department is about 10 million dollars. 

 

Regents Professor of Biology, New Mexico State University, 2006-Present.

 

 


SCHOLARSHIPS, FELLOWSHIPS, GRANTS, AND CONTRACTS:

 

Yale University Graduate Fellowship, 1977.

 

Sigma Xi grant in aid of research, 1978.

 

National Science Foundation Predoctoral Fellow, 1978-79, 1981.

 

Research Fellow, Yale University, 1980.

 

Theodore Roosevelt Memorial Fund, American Museum of Natural History, grant in aid of research, 1980.

 

National Science Foundation Improvement of Dissertation Grant, 1981.  Title of grant:  A Study of Evolutionary Relationships and Reproductive Isolation in the genus Allonemobius (Orthoptera: Gryllidae).  Amount of Award: $4,500.

           

National Science Foundation Research Grant, 1983-1986.  Title of grant:  The Role of Bacterial Symbionts in Host Race Formation of Obligate Insect Frugivores.  Amount of Award: $140,000.  Co-PI.  Guy L. Bush was PI.

 

National Science Foundation Research Grant, 1986-88.  Title of grant:  The Evolution of Reproductive Isolation in a Zone of Overlap and Hybridization.  Amount of Award:  $67,846.  PI.

 

National Science Foundation Research Grant, 1990-1994.  Title of grant: A Study of Reinforcement in a Zone of Overlap and Hybridization.  Amount of Award:  $200,000.  PI.  John Doherty of Villanova University was co-PI.

 

National Science Foundation REU Supplement, 1991-1992.  $10,000

 

National Science Foundation REU Supplement, 1992-1993.  $10,000.

 

New Mexico State University Minigrant, 1991-1992.  Title of project: A Study of Genetic Variation in the Ground Crickets Allonemobius fasciatus and A. socius.  Amount of Award:  $1,000.

 

National Science Foundation Research Grant, 1992-1996.  Title of grant: Herbivory in Oak Hybrid Zones: General Patterns, Genetic Relationships, and Mechanisms.  Amount of Award: $350,000.  Co-PI.  William Boecklen of NMSU was PI.

 

National Science Foundation Infrastructure Grant, 1993-1995.  Title of grant: Consolidation of the Laboratory of Ecological and Evolutionary Genetics.  Amount of Award with NMSU match: $302,000.  PI.  Four other members of the NMSU faculty were co-PIs.

 

National Science Foundation Research Grant, 1994-1997.  Title of grant: The Isolating Potential of a Post-Insemination Barrier to Fertilization.  Amount of Award: $261,000.  PI.  Michael Cain of NMSU was co-PI.

 

National Science Foundation Research Grant, 1997-2000.  Title of grant: Biogeographic, Molecular Genetic, and Field-Experimental Analyses of Plant-Herbivore Interactions in Oak Hybrid Zones.  Amount  of Award: $300,000.  Co-PI.  William Boecklen of NMSU was PI.

 

New Mexico Department of Game and Fish Contract, 1996-1999.  Title of Contract: Introgressive Hybridization of Rio Grande Cutthroat Trout.  Amount of Contract: $111,000.  PI.

 

National Science Foundation Research Grant, 1998-2002.  Title of grant: The Genetic Control and Evolutionary Significance of a Barrier to Interspecific Hybridization. Amount of Award: $395,000.  PI.  Michael Cain of NMSU was co-PI.

 

National Science Foundation REU Supplement.  1998-1999.  $5,000.

 

National Science Foundation REU Supplement.  2000- 2001.  $5,000.

 

National Science Foundation Infrastructure Grant, 2000-2003.  Title of grant: Enhancement for Research and Teaching Capabilities in Ecological, Environmental and Evolutionary Biology.  Amount of Award: $118,750.  Co-PI along with three others.  Michelle Nishiguchi of NMSU was PI.

 

National Science Foundation Research Grant, Integrated Research Challenges in Environmental Biology, 2001-2006.  Title of Grant: The origin of barriers to fertilization and their role in speciation: from populations to proteins.  Amount of Award: $2,279,000.  This is a collaborative proposal; my collaborators are: Willie Swanson (UC Riverside), William Rice (UC Santa Barbara), Sergey Gavrilets (University of Tennessee), and Richard Harrison (Cornell University).

 

National Science Foundation EPSCoR grant, 2002-2005.  Establishment of an Institute for Natural Resource Analysis and Management.  Amount of award from NSF: $3,000,000.  State match: $1,900,000. This is a collaborative proposal that was part of a larger statewide EPSCoR effort.  PI for this portion of proposal.  Overall PI is James Gosz of UNM.  Resigned as PI in 2003 to become head of the Department of Biology at NMSU.  I had about 15 co-PIs. 

 

National Science Foundation Research Grant, 2003-2008.  Title of grant: Bimodal Hybrid Zones:  Understanding stasis in the A. fasciatus—A. socius hybrid zone.  Amount of Award:  $348,000.  PI. 

 

Howard Hughes Medical Institute Improvement of Undergraduate Science Education, 2006-2010.  Amount of Award: $1,500,000.  PI and Program Director.

 

 

SCIENTIFIC SOCIETY MEMBERSHIP:

 

American Association for the Advancement of Science

 

American Society of Naturalists

 

Entomological Society of America

 

Genetics Society of America

 

Sigma Xi

 

Society for the Study of Evolution

 

The Society for Molecular Biology and Evolution

 

 

SCIENTIFIC SOCIETY SERVICE:

 

Member, Dobzhansky Prize Selection Committee, Society for the Study of Evolution, 1986.

 

Co-Organizer, Endless Forms: Species and Speciation.  A Symposium in Honor of Guy L. Bush, 1996, Asilomar, California.

 

 

EDITORIAL SERVICE:

 

Associate Editor, EVOLUTION, 1994-1996.

 

Member, Editorial Board, Journal of Orthoptera Research, 2005-Present.

 

 

PANEL SERVICE:

 

Population Biology Program, National Science Foundation, April 1995, April 1998, April 2001, October 2003.

 

Population and Evolutionary Ecology Program, National Science Foundation, October 2004.

 

Predoctoral Fellowship Program, National Science Foundation, March 2000.

 

 

HONORS AND AWARDS:

 

First recipient of Fort Bliss Federal Credit Union Faculty Research Award for New Mexico State University, 2001.

 

Faculty of 1000, BioMed Central.  As part of the faculty of 1000 I write brief comments on recently published research articles and these comments are disseminated worldwide to libraries and to individual subscribers. 

 

Regents Professor, New Mexico State University.  The highest honor awarded to professors at New Mexico State University.  This is a lifetime professorship.

 

 

INVITED TALKS:

 

The Evolutionary Significance of Bacteria Associated with Rhagoletis.  Department of Zoology, Michigan State University, East Lansing, Michigan.  February, 1984.

 

Habitat Segregation Among Crickets.  Kellogg Biological Station, Hickory Corners, Michigan.  March, 1984.

 

The Evolutionary Significance of Bacteria Associated with Rhagoletis.  Department of Biological Sciences, Wayne State University, Detroit, Michigan.  February, 1985.

 

The Pleasant Nuisance of Hybrid Zones and the Application of Electrophoretic Techniques to their Study.  Symposium on The Application of Molecular Biological Tools to Entomological Studies.  Sponsored by the National Conference of the Entomological Society of America, Hollywood, Florida.  December, 1985.

 

(a)  Of Bacteria, Flies, and Mutualism.  (b)  Some Reasons for Studying Hybrid Zones.  Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, Arizona.  February, 1986.

 

Of Bacteria, Flies, and Mutualism.  Department of Biological Sciences, Northern Arizona University, Flagstaff, Arizona.  February, 1986.

 

The Evolutionary Dynamics of a Cricket Hybrid Zone. Department of Environmental and Forest Biology, SUNY College of Environmental Science and Forestry, Syracuse, New York.  December, 1987.

 

The Evolutionary Dynamics of a Cricket Hybrid Zone. Section of Ecology and Systematics, Cornell University, Ithaca, New York.  December, 1987.

 

The Structure and Evolutionary Dynamics of a Cricket Hybrid Zone.  Department of Biology, University of Pennsylvania, Philadelphia, Pennsylvania.  February, 1988.

 

Small Populations, Inbreeding, and  Speciation.  Symposium on The Natural History of Inbreeding and Outbreeding.  Sponsored by the Animal Behavior Society, Louisville,  Kentucky.  June, 1989.

 

Reinforcement: the Origin, Dynamics and Fate of an Evolutionary theory.  Symposium on Hybrid Zones.  Sponsored by the Fourth International Congress of Systematic and Evolutionary Biology, College Park, Maryland.  July, 1990.

 

Post-Insemination Signaling Systems and Reinforcement.  Royal Society of London Discussion Meeting on the Evolution and Design of Animal Signaling Systems,  London, England.  October, 1992. 

 

Reproductive Isolation Between the Ground Crickets Allonemobius fasciatus and A. socius: The Search for an Elusive Trait.  Department of Zoology, Arizona State University, Tempe, Arizona.  January, 1993.

 

The Structure and Dynamics of the Allonemobius Hybrid Zone.  Symposium on "Hybrid Zones".  Fourth Congress of the European Society for Evolutionary Biology.  Montpellier, France.  August, 1993.

 

Wrong, Wrong, and Wrong Again: Understanding Reproductive Isolation Between Two Closely Related Ground Crickets.  Department of Genetics, University of Georgia, Athens, Georgia.  February, 1994.

 

Reinforcement, Post-Insemination Signaling Systems, and Reproductive Isolation Between Two Closely Related Ground Crickets.  Department of Ecology and Evolutionary Biology, University of Chicago, Chicago, Illinois.  November, 1994.

 

Reinforcement, Post-Insemination Signaling Systems, and Reproductive Isolation Between Two Closely Related Ground Crickets.  Department of Entomology, Pennsylvania State University, State College, Pennsylvania.  October, 1995.

 

The Evolution of Barriers to Fertilization Between Closely Related Organisms.  Endless Forms: Species and Speciation.  A Symposium in Honor of Guy L. Bush.  Asilomar, California.  May, 1996.

 

The Evolution of a Barrier to Fertilization Between Two Closely Related Ground Crickets.  Symposium on Hybrid Zones, 20th International Congress of Entomology, Florence, Italy.  August 1996.

 

The Evolution of a Barrier to Fertilization Between Two Closely Related Ground Crickets.  Department of Biology, University of California, Riverside.  April 1997.

 

How Discrete are Oak Species?  Insights from a Hybrid Zone Between Quercus grisea and Q. gambelii. Department of Biology, University of California, Riverside.  April 1997.

 

The Evolution of Barriers to Fertilization Between Closely Related Species.  Rocky Mountain Biological Laboratory, Gothic, Colorado.  August, 1997.

 

The Evolution of Barriers to Fertilization Between Two Closely Related Ground Crickets.  Department of Biology, Western Carolina University, Cullowhee, North Carolina.  March, 1998.

 

Do Mosaic Hybrid Zones Matter?  International Congress of Ecology, Florence, Italy.  August, 1998.

 

Do Mosaic Hybrid Zones Matter?  Hybrid Zones and Speciation, A Symposium in Honor of Murray Littlejohn.  University of Missouri, Columbia.  June, 1999.

 

The Dynamics of a mosaic hybrid zone: a fourteen year perspective.  Department of Ecology and Evolutionary Biology, University of Arizona, November 1999.

 

The Dynamics of a mosaic hybrid zone: a fourteen year perspective.   Department of Biology, Syracuse University.  February 2000.

 

Spatio-temporal dynamics of the Allonemobius fasciatusA. socius mosaic hybrid zone: a fourteen year perspective.  Hybridization, Phylogeography, and Speciation:  A Conference in Honor of Godfrey M. Hewitt.  Aussois, France, April 2000. 

 

The genetics of reproductive isolation: a retrospective and prospective look with comments on ground crickets.  American Society of Naturalists Vice-Presidential Symposium at the joint Evolution/ASN meeting in Bloomington, Indiana.  June 2000.

 

The genetics of reproductive isolation: a retrospective and prospective look with comments on ground crickets.  Department of Ecology and Evolutionary Biology, Cornell University.  September, 2000.

 

The genetics of reproductive isolation: a retrospective and prospective look with comments on ground crickets.  Department of Ecology and Evolutionary Biology, U.C. Davis.  November, 2000.

 

The Genetics of Conspecific Sperm Precedence in Allonemobius fasciatus.  European Society for Evolutionary Biology 2001 Conference, Aarhus, Denmark.  August, 2001.

 

Genetic Aspects of Reproductive Isolation between the ground crickets Allonemobius fasciatus and A. socius.  Department of Biological Sciences, University of South Carolina, Columbia, SC.  September, 2001.

 

Genetic Aspects of Reproductive Isolation between the ground crickets Allonemobius fasciatus and A. socius.  Department of Entomology, University of Illinois, Urbana-Champaign, IL, October 2001.

 

Species Formation:  A History of Ideas with Comments on Ground Crickets.  Invited Seminar for the University Research Council Research and Creative Activities Fair, New Mexico State University, Las Cruces, NM.  October, 2001.

 

Genetic Aspects of Reproductive Isolation between the ground crickets Allonemobius fasciatus and A. socius.  Department of Biology, University of New Mexico, Albuquerque, NM, January 2002.

 

Genetic Aspects of Reproductive Isolation between the ground crickets Allonemobius fasciatus and A. socius.  School of Biological Sciences, University of Texas, Austin, TX, March 2002.

 

Evolution in Hybrid Zones.  Department of Biological Sciences, University of Maryland, College Park Maryland, December 2003.

 

The evolution and genetics of reproductive isolation in Allonemobius.  Department of Biology, Colorado State University, December 2004. 

 

The evolution and genetics of a barrier to gene flow between the ground crickets Allonemobius fasciatus and A. socius.  Department of Ecology and Evolutionary Biology, University of Michigan, January 2005.

 

The evolution and genetics of conspecific sperm precedence.  International Conference on “The Evolution of Biodiversity: Past and Future”.  Fundación Ramón Areces y Real Academia de Ciencias Exactas, Físicas y Naturales, Madrid, Spain, February 2005.

 

The evolution and genetics of reproductive isolation between two closely related ground crickets.  Division of Biological Sciences, University of Montana, Missoula, April 2005.

 

Evolution in a cricket hybrid zone.  Invited plenary talk, Ninth International Conference of the Orthopterists Society, Canmore, Canada. August 2005.

 

Evolution in a Cricket Hybrid Zone.  Université Paris-Sud, Orsay, France. March, 2006. 

 

Genetic Explorations of Reproductive Isolation in Allonemobius.  Invited Symposium Talk.  Annual Meeting of the Society for Integrative and Comparative Biology, Phoenix, Arizona.  January 2007.

 

 

WORKSHOPS:

 

One of four instructors for the eight hour workshop, Fish Genetics: Use and Misuse in Management.  Arizona/New Mexico Chapter of the American Fisheries Society, Sierra Vista, Arizona, February 1998.

 

 

PUBLICATIONS:

 

Tabachnick, W.J. and D.J. Howard.  1982.  Genetic control of hexokinase variation in insects.  Biochemical Genetics 20:47-57.

 

Howard, D.J.  1983.  Electrophoretic survey of eastern North American Allonemobius (Orthoptera: Gryllidae): evolutionary   relationships and the discovery of three new species. Annals of the Entomological Society of America 76:1014-1021.

 

Rossiter, M.C., D.J. Howard, and G.L. Bush.  1983.  Symbiotic bacteria of Rhagoletis pomonella, pp. 77-84.  In:  R. Cavalloro (ed.), Fruit Flies of Economic Importance.  A.A. Balkema, Rotterdam.

 

Howard, D.J. and R.G. Harrison.  1984.  Habitat segregation in ground crickets:  experimental studies of adult survival, reproductive success, and oviposition preference.  Ecology 65:61-68.

 

Howard, D.J. and R.G. Harrison.  1984.  Habitat segregation in ground crickets: the role of interspecific competition and habitat selection.  Ecology 65:69-76.

 

Howard, D.J., G.L. Bush, and J.A. Breznak.  1985.  The evolutionary significance of bacteria associated with Rhagoletis.  Evolution 39:405-417.

 

Howard, D.J.  1986.  A zone of overlap and hybridization between two ground cricket species.  Evolution  40:34-43.

 

Howard, D.J.  1986.  Review of The Evolutionary Process by Verne Grant.  American Scientist 74:677-678.

 

Howard, D.J. and D.G. Furth.  1986.  Review of the Allonemobius fasciatus (Orthoptera: Gryllidae) complex with the description of two new species separated by electrophoresis, songs, and morphometrics.  Annals of the Entomological Society of America 79:472-481.

 

Bush, G.L. and D.J. Howard.  1986.  Allopatric and non-allopatric speciation; assumptions and evidence, pp. 411-438.  In: S. Karlin and E. Nevo (eds.), Evolutionary Processes and Theory.  Academic Press,  Orlando.

 

Harris, M.O., C. Chilcote, and D.J. Howard.  1986.  Electrophoretic studies of three Delia species (Diptera: Anthomyiidae). Journal of the Kansas Entomological Society 59:384-387.

 

Howard, D.J.  1988.  The species problem.  Review of Modern Aspects of Species, edited by K. Iwatsuki, P.H. Raven, and W.J. Bock.  Evolution  42:1111-1112.

 

Wellso, S.G., D.J. Howard, J.L. Adams, and J. Arnold.  1988.  Electrophoretic monomorphism in six biotypes and two populations of the Hessian fly (Diptera: Cecidomyiidae).  Annals of the Entomological Society of America 81:50-53.

           

Howard, D.J.  1989.  The symbionts of Rhagoletis, pp. 121-129.  In: A.S. Robinson and G. Hooper (eds.), Fruitflies, Their Biology, Natural Enemies and Control. Elsevier, Amsterdam.

 

Howard, D.J. and G.L. Bush.  1989.  The influence of bacteria on larval survival and development in Rhagoletis (Diptera: Tephritidae).  Annals of the Entomological Society of America 82:633-640.

 

Howard, D.J. and W.M. Shields.  1990.  Patterns of genetic variation within and among species of Chauliognathus (Coleoptera: Cantharidae).  Annals of the Entomological Society of America 83:326-334.

 

Waring, G.L., W.G. Abrahamson, and D.J. Howard.  1990.  Genetic differentiation of host-associated populations in the gallformer Eurosta solidaginis (Diptera: Tephritidae).  Evolution 44:1648-1655.

 

Benedix, J.H. Jr. and D.J. Howard.  1991.  Calling song displacement in a zone of overlap and hybridization.  Evolution 45:1751-1759.

 

Howard, D.J. and G.L. Waring.  1991.  Topographic diversity, zone width, and the strength of reproductive isolation in a zone of overlap and hybridization.  Evolution 45:1120-1135.

 

Howard, D.J.  1993.  Small populations, inbreeding, and speciation, p. 118-142.  In: N.W. Thornhill (ed.), The Natural History of Inbreeding and Outbreeding: Theoretical and Empirical Perspectives.  The University of Chicago Press, Chicago.

 

Howard, D.J.  1993.  Reinforcement: the origin, dynamics, and fate of an evolutionary hypothesis, p. 46-69.  In: R.G. Harrison (ed.), Hybrid Zones and the Evolutionary Process, Oxford University Press, New York.

 

Howard, D.J. and P.G. Gregory.  1993.  Post-insemination signalling systems and reinforcement.  Philosophical Transactions of the Royal Society of London B 340:231-236.

 

Howard, D.J., G.L. Waring, C.A. Tibbets, and P.G. Gregory. 1993. Survival of hybrids in a mosaic hybrid zone.  Evolution 47:789-800.

 

Gregory, P.G. and D.J. Howard.  1993.  Laboratory hybridization studies of Allonemobius fasciatus and A. socius (Orthoptera: Gryllidae).  Annals of the Entomological Society of America 86:694-701.

 

Gregory, P.G. and D.J. Howard.  1994.  A post-insemination barrier to fertilization isolates two closely related ground crickets.  Evolution 48:705-710.

 

Chu, J., E. Powers, and D.J. Howard.  1995.  Gene exchange in a ground cricket hybrid zone.  Journal of Heredity 86:17-21.

 

Doherty, J. A. and D. J. Howard.  1996.  Lack of preference for conspecific calling songs in female crickets.  Animal Behaviour 51:981-990.

 

Gregory, P.G. and D.J. Howard.  1996.  Multiple mating in natural populations of ground crickets.  Entomologia Experimentalis et Applicata 78: 353-356.

 

Veech, J.A., J.H. Benedix Jr., and D.J. Howard.  1996.  Lack of calling song displacement between two closely related ground crickets.  Evolution 50:1982-1989.

 

Howard, D.J., R.W. Preszler, J. Williams, Sandra Fenchel, and W.J. Boecklen.  1997.  How discrete are oak species? Insights from a hybrid zone between Quercus grisea and Q. gambelii.  Evolution 51:747-755.

 

Boecklen, W.J. and D.J. Howard.  1997. Genetic analysis of hybrid zones: Number of markers and power of resolution.  Ecology 78:2611-2616.

 

Chu, J. and D.J. Howard.  1998.  Genetic linkage maps of the ground crickets Allonemobius fasciatus and Allonemobius socius using RAPD and allozyme markers.  Genome 41:841-847. 

 

Gregory, P.G. and D.J. Howard.  1998.  Patterns of mating between two closely related ground crickets are not influenced by sympatry. Entomologia Experimentalis et Applicata 87:263-270. 

 

Mousseau, T.A. and D.J. Howard 1998.  Genetic variation in cricket calling song across a hybrid zone between two sibling species.  Evolution 52:1104-1110.

 

Howard, D.J.  1998.  Unanswered questions and future directions in the study of speciation, pp. 439-448.  In: D.J. Howard and S.H. Berlocher (eds.), Endless Forms: Species and Speciation.  Oxford University Press, New York.

 

Howard, D.J., M. Reece, P.G. Gregory, J. Chu, and M.L. Cain.  1998.  The evolution of barriers to fertilization between closely related organisms, pp. 279-288.  In: D.J. Howard and S.H. Berlocher (eds.), Endless Forms: Species and Speciation.  Oxford University Press, New York.

 

Howard, D.J., P.G. Gregory, J. Chu, and M.L. Cain.  1998.  Conspecific sperm precedence is an effective barrier to hybridization between closely related species.  Evolution 52:511-516.

 

Roff, D.A., T.A. Mousseau, and D.J. Howard.  1999.  Variation in genetic architecture of calling song among populations of Allonemobius socius, A. fasciatus, and a hybrid population: Drift or selection?  Evolution 53: 216-224.

 

Cain, M.L, V. Andreasen, and D.J. Howard.  1999.  Reinforcing selection is effective under a relatively broad set of conditions in a mosaic hybrid zone.  Evolution 53:1343-1353.

 

Howard, D.J.  1999.  Conspecific sperm and pollen precedence and speciation.  Annual Review of Ecology and Systematics 30:109-132.

 

Howard, D.J.  2000.  Allopatric speciation.  Encyclopedia of Life Sciences.  Macmillan Reference Ltd., London.  (Online encyclopedia, 4,000 word article).

 

Weibel, A.C. and D.J. Howard.  2000.  Discovery of new populations of striped ground crickets in western North America: Distribution, subdivision, and introduction detected by allozyme data.  Journal of the Entomological Research Society 2(2):1-25.

 

Weibel, A.C. and D.J. Howard.  2000.  Canonical correlation of allozyme and morphological variation across distinct geological features in one species of striped ground crickets.  Journal of the Entomological Research Society 2(3):15-29.

 

Britch, S.C., M.L. Cain, and D.J. Howard.  2001.  Spatio-temporal dynamics of the Allonemobius fasciatusA. socius mosaic hybrid zone: a fourteen year perspective.  Molecular Ecology 10:627-638.

 

Howard, D. J., J. L. Marshall, W. E. Braswell, and J. A. Coyne.  2001.  Examining evidence of reproductive isolation in sockeye salmon.  Science 291:1853a.

 

Williams, J. H., D. J. Howard, and W. J. Boecklen.  2001.  Reproductive processes in two oak (Quercus) contact zones with different levels of hybridization.  Heredity 87:680-690.

 

Howard, D.J., J.L. Marshall, D.D. Hampton, S.C. Britch, M.L. Draney, J. Chu, and R.G. Cantrell. 2002.  The genetics of reproductive isolation: a retrospective and prospective look with comments on ground crickets.  The American Naturalist 159S:S8-S21. 

 

Marshall, J. L., M. L. Arnold, and D. J. Howard.  2002.  Reinforcement: The road not taken.  Trends in Ecology & Evolution 17:558-563.

 

Marshall, J. L., M. L. Arnold, and D. J. Howard.  2003.  Reinforcement with multiple mating.  Trends in Ecology & Evolution 18:166.

 

Howard, D.J., S.C. Britch, W.E. Braswell, and J.L. Marshall.  2003.  Evolution in hybrid zones, pp. 297-314. In R.S. Singh and M.K. Uyenoyama (eds.), The Evolution of Population Biology.  Cambridge University Press, Cambridge.

 

Swenson, N.G. and D.J. Howard.  2004.  Do suture zones exist?  Evolution 58: 2391-2397. 

 

Swenson, N.G. and D.J. Howard.  2005.  Clustering of contact zones, hybrid zones, and phylogeographic breaks in North America.  The American Naturalist 166:581-591.

 

Braswell, W.E., L.M. Birge, and D.J. Howard.  2006.  Allonemobius shalontaki, a new cryptic species of ground cricket (Orthoptera; Gryllidae; Nemobiinae) from the southeastern United States.  Annals of the Entomological Society of America 99:449-456.

 

Braswell, W.E., J.A. Andrés, L.S. Maroja, R.G. Harrison, D.J. Howard, and W.J. Swanson.  2006.  Identification and comparative analysis of accessory gland proteins in Orthoptera.  Genome 49:1069-1080.

 

 


BOOKS:

 

Howard, D.J. and S.H. Berlocher (eds.).  1998.  Endless Forms: Species and Speciation.  Oxford University Press, New York.

 

 

REPORTS:

 

Phillips, B.G., A.M. Phillips, III, and D.J. Howard.  1988.  Genetic studies of Purshia subintegra and Purshia stansburiana.  Final Report submitted to United States Bureau of Reclamation, Phoenix, Arizona.  Order No. 7-PG-32-20800.  42 pp.

 

 

IN PRESS:

 

Howard, D. J., S. R. Palumbi, L. Birge, M. K. Manier.  Sperm and speciation.  In T.R. Birkhead, D.J. Hosken and S. Pitnick (eds.), Sperm Biology: an Evolutionary Approach. Elsevier Press.

 

S.C. Britch, E.J. Swartout, D.D. Hampton, M.L. Draney, J. Chu, J.L. Marshall, and D.J. Howard.  Genetic architecture of conspecific sperm precedence.  Genetics, in press.

 

L. M. Birge, W. E. Braswell, and D. J. Howard.  A component of isolation between Allonemobius shalontaki (Orthoptera: Gryllidae: Nemobiinae) and a sympatric congener.  Annals of the Entomological Society of America, in press.

 

 

SUBMITTED:

C. H. Ross, J. H. Benedix, Jr. C. Garcia, K. Lambeth, R. Perry, V. Selwyn, and D. J. Howard.   Scale-independent criteria and scale-dependent agents determining the structure of a ground cricket mosaic hybrid zone.  Submitted to Evolution.

 

 

Master’s students:

 

Past:           Root Gorelick, Carleton University (assistant professor); Daniel Hampton, Duke University (medical resident); Andrea Hughes, Florida Department of Natural Resources; Joseph Veech, Colorado State University (postdoctoral fellow); Joseph Williams, University of Tennessee (assistant professor); Emma Swartout, private industry; Nathan Swenson, University of Arizona (Ph.D. student); Travis Traylor, deceased

 

 


PH.D. STUDENTS:

 

Past:           Jeb Bevers, Yavapai College (assistant professor); Leanna Birge, University of Maryland (postdoctoral fellow); W. Evan Braswell, University of British Columbia (postdoctoral fellow); Seth Britch, USDA, ARS (postdoctoral fellow); Jiming Chu, Doña Ana Branch Community College (associate professor); Pamela Gregory, USDA, ARS (staff scientist); Connie Keeler-Foster, U.S. Fish and Wildlife Service (research leader);

 

Present:      Aysegul Birand, Marcus Williams, Christin Slaughter

 

 

Postdoctoral Scholars:

 

Past:           Gwendolyn Waring, Grand Canyon Association; Michael Draney, Associate Professor, University of Wisconsin, Green Bay; Jeremy Marshall, Assistant Professor, Kansas State University

 

Present:      Charles Ross (has accepted tenure-track position at Hampshire College, will begin fall 2007)

 

 

COURSES TAUGHT:

 

Natural History of Life—Intro Bio

Zoology

Insect Biology—upper division and graduate

Evolution

Genetics of Populations—lecture, upper division and graduate

Hybrid Zones—seminar

Speciation—seminar

Speciation and Adaptation—graduate core course

Evolution of Signaling Systems—seminar

Evolution and Development—seminar