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Research and Publications
Current Research
Behavioral Ecology, Ecology, Evolutionary Biology
1).  Behavioral ecology of reproduction in the Barn Swallow (Hirundo rustica).  Current studies are designed to test alternate hypotheses on the causation and functions
of hatching asynchrony.  My current project is designed to test the "egg viability hypothesis".  For more details click here.

2)  Characterization of stock ponds and their role in the  winter ecology of Mallards (Anas platyrhynchos) in Northeast Texas.  Research sponsored by Texas Parks and Wildlife Department on mallard utilization of stock ponds in Northeast Texas.  Currently two projects are underway.  The first evaluates the feeding habits and body condition of female mallards utilizing stock ponds in late winter.  A detailed description of this project can be found here.  The second project, which has just been initiated, will characterize food availability in these stock ponds by evaluating vegetation and invertebrate abundance.  Two other projects evaluating water quality and chemistry are planned in the near future.

3) Stabilimenta in the Golden Garden Spider (Argiope aurantia): a test of the insect attraction hypothesis.  By manipulating stabilimentum color and UV reflectivity, we are testing the hypothesis that these web structures serve to attract insects into the spider's web.  Details are available here.

4)  Karyotypic studies among species of Zonotrichia and Junco.  We are evaluating chromosomal evolution using measurements from the karyotypes of Juncos (Junco hyemalis), White-throated Sparrows (Zonotrichia albicollis), White-crowned 
Sparrows (Zonotrichia leucophrys), and Harris' Sparrows (Zonotrichia querula).  From these data a cladogram will be constructed and compared to cladograms derived from studies using morphological characters and selectively neutral molecular markers.  From these comparisons we hope to determine whether chromosome morphology is selectively neutral (i.e.. evolves parallel to neutral molecular markers).

General Research Interests
1)  Behavioral ecology and reproductive strategies.  See Current Research above or click here or click here or click here.

2) Community, population, and restoration ecology: Ecology and management of tall-grass prairie ecosystems in northeast Texas, habitat and resource partitioning among Indigo and Painted Buntings, behavior and activity patterns of the Red-eared Slider.

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Selected Publications
Full Journal Papers

Kopachena, J.G.  1987.  Variations in the temporal spacing of Franklin's gull (Larus 
     pipixcan) flocks.  Canadian Journal of Zoology  65: 2450-2457.
Kopachena, J.G.  1991.  Food dispersion, predation, and the relative advantage of 
     colonial nesting.  Colonial Waterbirds  14: 7-12.
Kopachena, J.G. and C.J. Crist.  2000.  Micro-habitat features associated with Painted 
     and Indigo Buntings in northeast Texas.  Texas Journal of Science 52: 133-144.
Kopachena, J.G. and C.J. Crist.  2000.  Macro-habitat features associated with Painted 
     and Indigo Buntings in northeast Texas.  Wilson Bulletin 112: 108-114
Kopachena, J.G. and Evans, R.M.  1990.  Flock recruitment in Franklin's Gulls. 
     Colonial Waterbirds  13: 92-95.
Kopachena, J.G. and Falls, J.B.  1991.  An experimental study of brood division in 
     white-throated sparrows.  Animal Behaviour  42: 395-402.
Kopachena, J.G. and Falls, J.B.  1993.  Post-fledging parental care in the White-
     throated Sparrow (Zonotrichia albicollis).  Canadian Journal of Zoology  71: 
     227-232.
Kopachena, J.G. and Falls, J.B.  1993.  Re-evaluation of morph-specific variations in 
     parental behaviour of White-throated Sparrows.  Wilson Bulletin  105: 48-59.
Kopachena, J.G. and Falls, J.B.  1993.  Aggressive performance as a behavioral 
     correlate of plumage polymorphism in the White-throated Sparrow (Zonotrichia 
     albicollis). Behaviour 124: 249-266.
Kopachena, J.G. and Kollar, C.S.  1999.  A herpetological survey of three old-field 
     sites at Cooper Lake. Texas Journal of Science  51:211-224.
Kopachena, J.G., A.J. Buckley, and G.A. Potts.  2000.  Effects of the American 
     Swallow Bug (Oeciacus vicarius) on reproductive success in  the Barn Swallow 
     (Hirundo rustica).  Texas Journal of Science 52: 33-47.
Kopachena, J.G., A.J. Buckley, and G.A. Potts.  2000.  Some observations on the 
     effects of the Red Imported Fire Ant (Solenopsis invicta) on the reproductive 
     success of Barn Swallows (Hirundo rustica) in northeast Texas. Southwestern 
     Naturalist  45(4): in press.

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Student Masters Theses

Crist, C.J.  1998.  An evaluation of habitat selection among Painted Buntings (Passerina
     ciris) and Indigo Buntings (Passerina cyanea).  Masters Thesis, Texas A&M 
     University - Commerce.
Dees, D.  1998. The significance of spot patterns in the Convergent Lady Beetle. 
     Masters Thesis, Texas A&M University - Commerce.
Mays, M.Y.  1998.  A comparison of the karyotypes of Junco hyemalis, Zonotrichia 
     querula, and Z. leucophrys.  Masters Thesis, Texas A&M University - Commerce.
Wakoson, A.H.  1996  Chromosomal polymorphism in white-throated sparrows. 
     Masters Thesis, Texas A&M University - Commerce.
Wilkinson, J.R..  1997.  Comparison of fecundity, longevity and larval viability in four 
     lines of Drosophila melanogaster.  Masters Thesis, Texas A&M University - 
     Commerce.

Student Honors Theses

Healy, J.M.  1997.  Distribution of arsenic residues at the Commerce, Texas, SuperFund
     Site.  Honors Thesis, Texas A&M University - Commerce.
Kollar, C.M.  1995.  A herpetological survey of three degraded tall-grass prairie sites 
     around Cooper Lake. Honors Thesis, East Texas State University.
Miller, T.M.  1997.  A study of movement patterns and basking behavior of a turtle 
     population inhabiting a northeast Texas pond.  Honors Thesis, Texas A&M 
     University - Commerce.

Student Theses (in progress)

Dawson, L. E.  Chromosomal evaluation of phylogenetic relationships among the 
     Zonotrichia.  MSc Thesis, expected date of completion:  December 2000.
Strickland, K.  A test of the egg viability hypothesis in Barn Swallows (Hirundo 
     rustica).  Honors Thesis, expected date of completion:  May, 2002.
Simpson, E.  A test of the nest protection hypothesis in the Eastern Phoebe (Sayornis 
     phoebe).  Masters Thesis, expected date of completion:  May, 2002.
Wise, F.R.  A comparison of the bacterial flora of nestling of Barn Swallows (Hirundo 
     rustica) and Eastern Phoebes (Sayornis phoebe).  Honors Thesis, expected date 
     of completion:  December 2000.

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CONFERENCE PRESENTATIONS

Crist, C.J., and Kopachena, J.G.  1998.  An evaluation of gross habitat features around 
     the song perches of Indigo and Painted Buntings in Northeast Texas.  Proceedings of 
     the 101st annual meeting of the Texas Academy of Science, 5 March - 7 March, 
     1998, The University of Texas at Tyler, Tyler, TX.
Crist, C.J., and Kopachena, J.G.  1997.  A comparison of habitat selection by male 
     Painted and Indigo Buntings.  Proceedings of the 100th annual meeting of the Texas 
     Academy of Science, 6 March - 8 March, 1997, Sam Houston State University, 
     Huntsville TX.
Crist, C.J., and Kopachena, J.G.  1997.  A comparison of habitat selection by male 
     Painted and Indigo Buntings. Annual District Convention of the Tri-Beta Biological 
     Honors Society, 12 April - 14 April, 1997, University of Oklahoma Field Station, 
     Lake Texoma, Oklahoma.
Fulmer, J.R., Lee, D.R., and Kopachena, J.G.  1998.  A microbiological study of in 
     vitro soil and water microhabitats of ponds using a Winogradky method. 
     Proceedings of the 101st annual meeting of the Texas Academy of Science, 
     5 March - 7 March, 1998, The University of Texas at Tyler, Tyler, TX.
Healy, J.M., and Kopachena, J.G.  1997.  Distribution of arsenic residues at the 
     Commerce, Texas, SuperFund site.  Proceedings of the 100th annual meeting of the 
     Texas Academy of Science, 6 March - 8 March, 1997, Sam Houston State 
     University, Huntsville TX.
Healy, J.M., and Kopachena, J.G.  1997.  Distribution of arsenic residues at the 
     Commerce, Texas, SuperFund site. Annual District Convention of the Tri-Beta 
     Biological Honors Society, 12 April - 14 April, 1997, University of Oklahoma Field 
     Station, Lake Texoma, Oklahoma.
Kennedy, M., Price, D.M., Betts, J.G., and Kopachena, J.G.  1996.  Analysis of 
     biomass and productivity of the goldenrod (Solidago sp.).  Annual District 
     Convention of the Tri-Beta Biological Honors Society, 12 April - 14 April, 1996, 
     University of Oklahoma Field Station, Lake Texoma, Oklahoma.
Kollar, Cynthia M., and Kopachena, Jeffrey G.  1996.  A herpetological survey of three 
     degraded tall-grass prairies around Cooper Lake.  Proceedings of the 99th annual 
     meeting of the Texas Academy of Science, 29 February - 2 March, 1996, Texas 
     A&M University at Galveston, Galveston TX. p. 124.
Kollar, Cynthia M., and Kopachena, Jeffrey G.  1996.  A herpetological survey of three 
     degraded tall-grass prairies around Cooper Lake.  National Council on 
     undergraduate Research Meeting,  University of North Carolina at Asheville, 
     Asheville, North Carolina.
Kollar, Cynthia M., and Kopachena, Jeffrey G.  1996.  A herpetological survey of three 
     degraded tall-grass prairies around Cooper Lake.  Annual District Convention.  Beta 
     Beta Beta Biological Honors Society, University of Oklahoma Field Station, 
     Oklahoma.
Kopachena, J.G.  1985.  Spatial and temporal aspects of Franklin's gull flocks.  Special 
     Symposium:  The ecology and behavior of gulls.  Joint Meeting of the Colonial 
     Waterbird Group and the Pacific Seabird Group. 6 December 1985, San Francisco, 
     California.
Kopachena, J.G.  1995.  Polymorphisms in White-throated Sparrows (Zonotrichia 
     albicollis) - genetically based reproductive strategies? Proceedings of the 98th 
     annual meeting of the Texas Academy of Science, 3 March, 1995, Baylor 
     University, Waco, TX.
Kopachena, Jeffrey G.  1996.  Physical correlates of nest departure in a ground-nesting
     bird: the white-throated sparrow Zonotrichia albicollis.  Proceedings of the 99th 
     annual meeting of the Texas Academy of Science, 29 February - 2 March, 1996, 
     Texas A&M University at Galveston, Galveston TX.
Kopachena, J.G. and Falls, J.B.  1988.  Post-fledging parental care in the white-
     throated Sparrow.  Ontario Ethology and Ecology Colloquium.  18 April 1988, 
     University of Western Ontario, London, Ontario.
Kopachena, J.G. and Falls, J.B.  1989.  Behavioral correlates of polymorphism in the 
     White-throated Sparrow. Ontario Ethology and Ecology Colloquium.  15 April 
     1989, Queen’s University, Kingston, Ontario. 
Kopachena, J.G. and Falls, J.B.  1989.  Behavioral correlates of polymorphism in the 
     White-throated Sparrow. 101st Stated Meeting, American Ornithologists Union. 
     9 August 1989, Pittsburgh, Pennsylvania.
Kopachena, J.G., Buckley, A.J., and Potts, G.A.  1999.  Effect of the American 
     Swallow Bug (Oeciacus vicarius) on reproductive success in the Barn Swallow. 
     Proceedings of the 102nd annual meeting of the Texas Academy of Science, 
     4 March - 6 March, 1999, Texas Lutheran University, Seguin, Texas.
Kopachena, J.G., Robinson, K.E., Wing, M., Cooke, F., and Holden, J.J.A.  1993. 
     Characterization of a chromosomal polymorphism with phenotypic effect in the 
     White-throated Sparrow (Zonotrichia albicollis). Annual Meeting of the Genetics 
     Society of Canada.  11-14 June 1993, Lac Du Lage, Quebec.
Wilkinson, J.R., and Kopachena, J.G.  1997.  Comparison of fecundity, longevity and 
     larval viability in Drosophila.  Proceedings of the 100th annual meeting of the Texas 
     Academy of Science, 6 March - 8 March, 1997, Sam Houston State University, 
     Huntsville TX.
Simpson, E.M., and Kopachena, J.G.  2001.  A test of the nest protection hypothesis in
     the Eastern Phoebe (Sayornis phoebe).  Proceedings of the 104nd annual meeting of 
     the Texas Academy of Science, 2 March - 3 March, 2001,  Southwest Texas State
     University, San Marcos, Texas.

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