103 Illick Hall
1 Forestry Dr.
Syracuse, New York 13210
EFB 486 Ichthyology (3 credit hours). Two hours of lecture, three hours of laboratory. An introduction to the anatomy, physiology, ecology, behavior, and taxonomy of fishes.
EFB 523 and FOR 523 Tropical Ecology (3 credit hours). Field-oriented labs, lectures and independent research, including a 10-day study-trip to Dominica, the ‘Nature Island of the Caribbean’ during spring break. Focuses on structure and function of tropical ecosystems, biodiversity and natural resource management in the tropics. [Counts as 3 credits towards the EFB field experience requirement]
Graduate Research Topic
My thesis research is focused on quantifying the role that mixotrophic algae play in freshwater pelagic food webs. Mixotrophs, which are algae that combine photosynthetic production with heterotrophic consumption, are currently well identified in the literature, but their effects on both primary production and trophic transfer rate estimations are largely unknown. Utilizing stable isotopic tracers in conjunction with lab and field experimentation, I am developing a framework with which to address these questions for the first time.
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Doctoral Research Brief:
My research focuses on the ecology, conservation, and management of Amazonian arapaima, among the largest freshwater fish species in the world (More Information).
Research Key Words:
conservation biology, tropics, freshwater fish ecology, protected areas [and beyond], carbon, flagship, diversity
Before coming to ESF, I worked in several laboratories at Cornell. The focus of the work was broad in scope, including ichthyology, limnology, stable isotope analysis and microbiology. My graduate work focuses on the catfish of the family Pimelodidae, particularly the giants of the genus Brachyplatystoma, which undertake spawning migrations of thousands of kilometers in the Amazon River. Using microelemental analysis of otoliths, I aim to determine phylogenetic patterns of migration within the family.
Graduate Research Topic
Determining patterns of migration within the Amazonian catfish family, Pimelodidae, using otolith microelemental data.
I am a Ph. D. student majoring in Fish and Wildlife Biology and Management at SUNY ESF in Syracuse, NY. I also worked with Dr. Donald Stewarts lab for my MS Degree but before I came to ESF, I was a faculty member of the Aquatic Biology Program of Western Philippines University in Puerto Princesa, Philippines. My MS research focused on taxonomy and conservation of the minnow genus Puntius in northern Palawan, Philippines. Currently, my graduate research in ESF deals with fish community patterns in riverine and coastal ecosystems of Honda Bay Basin. My research aims to compare the species composition of fishes from rivers, estuaries, and coral reef areas in Honda Bay area in Palawan, Philippines. The main goal is to assess the connectivity of these ecosystems in terms of supporting the different life history stages of several commercially important species in Honda Bay. I hope that through the results of my study, sound management programs will be formulated and implemented to effectively delineate marine protected areas that will provide umbrella protection to the different ecosystems that support the Honda Bay area fish communities.
Graduate Research Topic
Riverine and Coastal Fish Community Patterns in Honda Bay, Puerto Princesa City, Philippines
74. Kaatz, I.M., and D.J. Stewart. 2012. Bioacoustic variation of swimbladder disturbance sounds in Neotropical doradoid catfishes (Siluriformes: Doradidae, Auchenipteridae): potential morphological correlates. Curr. Zool. 58: 171−188.
73. Castello, L., D.J. Stewart, and C.C. Arantes. 2011. Modeling population dynamics and conservation of arapaima in the Amazon. Rev. Fish Biol. Fisheries 21: 623-640.
72. Kaatz, I.M., D.J. Stewart, A.N. Rice, and P.S. Lobel. 2010. Differences in pectoral fin spine morphology between vocal and silent clades of catfishes (Order Siluriformes): Ecomorphological implications. Curr. Zool. 56: 73-89.
71. Lujan, N.K., M. Hidalgo, and D.J. Stewart. 2010. Revision of Panaque (Panaque), with descriptions of three new species from the Amazon Basin (Siluriformes, Loricariidae). Copeia 2010: 676-704.
70. Arantes, C.C., L. Castello, D.J. Stewart, M. Cetra, and H.L. Queiroz. 2010. Population density, growth and reproduction of arapaima in an Amazonian river-floodplain. Ecol. Freshw. Fish 19: 455-465.
69. Castello, L., and D.J. Stewart. 2010. Assessing CITES non-detriment findings procedures for Arapaima in Brazil. J. Appl. Ichthyol. 26: 49-56.
68. Murry, B.A., R. O’Gorman, M.J. Connerton, D.J. Stewart, and N.H. Ringler. 2010. Lake-wide estimates of alewife biomass and Chinook salmon abundance and consumption in Lake Ontario, 1989–2005: implications for prey fish sustainability. Trans. Amer. Fish. Soc. 139: 223-240.
67. Connerton, M.J., B.A. Murry, N.H. Ringler, and D.J. Stewart. 2009. Majority of age-3 Chinook salmon (Oncorhynchus tshawytscha) in Lake Ontario were wild from 1992 to 2005, based on scale pattern analysis. J. Great Lakes Res. 35: 419-429.
66. Lantry, B.F., L.G. Rudstam, J.L. Forney, A.J. VanDeValk, E.L. Mills, D.J. Stewart, and J.V. Adams. 2008. Comparisons between consumption estimates from bioenergetics simulations and field measurements for walleyes from Oneida Lake, New York. Trans. Amer. Fish. Soc. 137: 1406-1421.
65. Coghlan, S.M., Jr., M.J. Connerton, N.H. Ringler, D.J. Stewart, and J.M. Mead. 2007. Survival and growth responses of juvenile salmonines stocked in eastern Lake Ontario tributaries. Trans. Amer. Fish. Soc. 136: 56-71.
64. Murphy, M.H., M.J. Connerton, and D.J. Stewart. 2006. Evaluation of winter severity on growth of young-of-the-year Atlantic salmon. Trans. Amer. Fish. Soc. 135: 420-430.
63. Silva-Naranjo, E.A., and D.J. Stewart. 2006. Life history and migration patterns of the commercial fish Prochilodus nigricans (bocachico) in North-eastern Ecuador. Envir. Biol. Fish. 77: 63-77.
62. Wurster, C.M., W.P. Patterson, D. J. Stewart, J.N. Bowlby, and T.J. Stewart. 2005. Thermal histories, stress, and metabolic rates of chinook salmon (Oncorhynchus tshawytscha) in Lake Ontario: evidence from intra-otolith stable isotope analyses. Can. J. Fish. Aquat. Sci.. 62: 700-713.
61. He, J.X., L.G. Rudstam, J.L. Forney, A.J. VanDeValk, and D.J. Stewart. 2005. Long-term patterns in growth of Oneida Lake walleye: a multivariate and stage-explicit approach for applying the von Bertalanffy function. J. Fish. Biol. 66: 1-12.
60. Galacatos, K., R. Barriga-Salazar, and D.J. Stewart. 2004. Seasonal and habitat influences on fish communities within the lower Yasuni River basin of the Ecuadorian Amazon. Envir. Biol. Fish. 71: 33-51.
59. Madenjian, C.P., D. O’Conner, D.J. Stewart, M. Miller and R. Masnado. 2002. Field estimate of net trophic transfer efficiency of PCBs to Lake Michigan chinook salmon from their prey. Environ. Sci. Technol. 36: 5029-5033.
58. Stewart, D.J., M. Ibarra and R. Barriga-Salizar. 2002. Comparison of deep-river and adjacent sandy-beach fish assemblages in the Napo River basin, Eastern Ecuador. Copeia 2002: 333-343.
57. He, J., and D.J. Stewart. 2002. A stage-explicit expression of the von Bertalanffy growth model for understanding age at first reproduction of Great Lakes fishes. Can. J. Fish. Aquat. Sci. 59: 250-261. [PERSPECTIVE]
56. He, J., and D.J. Stewart. 2001. Age and size at first reproduction of fishes: predictive models based only on growth trajectories. Ecology 82: 784-791
55. Idrisi, N., E.L. Mills, L.G. Rudstam, and D.J. Stewart. 2001. Impact of zebra mussels (Dreissena polymorpha) on the pelagic lower trophic levels of Oneida Lake, New York. Can. J. Fish. Aquat. Sci. 58: 1430-1441.
54. Lantry, B.F., and D.J. Stewart. 2000. Population dynamics of rainbow smelt (Osmerus mordax) in Lakes Ontario and Erie: A modeling analysis of cannibalism effects. Can. J. Fish. Aquat. Sci. 57: 1594-1606.
53. Nelson, J.A., D.A. Wubah, M.E. Whitmer, E.A. Johnson, and D.J. Stewart. 1999. Wood-eating catfishes of the genus Panaque: gut microflora and cellulolytic enzyme activities. J. Fish Biol. 54: 1069-1082.
52. Lantry, B.F., D.J. Stewart, P.S. Rand, and E. L. Mills. 1999. Evaluation of total-body electrical conductivity to estimate whole-body water content of yellow perch, Perca flavescens, and alewife, Alosa pseudoharengus. Fish. Bull. 97: 71-79.
51. He, J., and D.J. Stewart. 1998. Ontogeny of energetic relationships and potential effects of tissue turnover: a comparative modeling study on lake trout. Can. J. Fish. Aquat. Sci. 55: 2518-2532. [PERSPECTIVE]
50. Rand, P.S., and D.J. Stewart. 1998. Dynamics of salmonine diets and foraging in Lake Ontario, 1983-1993: a test of a bioenergetic model prediction. Can. J. Fish. Aquat. Sci. 55: 307-317.
49. Rand, P.S., and D.J. Stewart. 1998. Prey fish exploitation, salmonine production, and pelagic food web efficiency in Lake Ontario. Can. J. Fish. Aquat. Sci. 55: 318-327.
48. Kaatz, I.M., and D.J. Stewart. 1997. The evolutionary origin and functional divergence of sound production in catfishes: stridulation mechanisms. J. Morphol. 232: 272.
47. He, J., and D.J. Stewart. 1997. Comment: Measuring the bioenergetic cost of fish activity in situ using a globally dispersed radio tracer (137Cs). Can. J. Fish. Aquat. Sci. 54: 1953C1954.
46. Galacatos, K., D.J. Stewart, and M. Ibarra. 1996. Fish community patterns of lagoons and associated tributaries in the Ecuadorian Amazon. Copeia 1996: 875-894.
45. Rudstam, L. [ed., with 11 Contributors]. 1996. A review of the current status of Lake Ontario's pelagic fish community. A report of the 1996 Lake Ontario Technical Panel. Great Lakes Research Review 2: 4-10.
44. Rand, P., D. Stewart, B. Lantry, L. Rudstam, O. Johannsson, A. Goyke, S. Brandt, R. O'Gorman, and G. Eck. 1995. Level and effect of whole-lake invertebrate predation by pelagic planktivores in lakes Michigan and Ontario. Can. J. Fish. Aquat. Sci. 52: 1546-1563.
43. Rand, P., B. Lantry, R. O'Gorman, R. Owens and D.J. Stewart. 1994. Energy density and size of pelagic prey fishes in Lake Ontario, 1978-90: implications for salmonine energetics. Trans. Am. Fish. Soc. 123: 519-534.
42. Schaefer, S.A., and D.J. Stewart. 1993. Systematics of the Panaque dentex species group (Siluriformes: Loricariidae), wood-eating armored catfishes from tropical South America. Ichthyol. Explor. Freshwaters 4: 309-342.
41. Rand, P., D.J. Stewart, P. Seelbach, M. Jones, and L. Wedge. 1993. Modeling steelhead trout population energetics in lakes Michigan and Ontario. Trans. Am. Fish. Soc. 122: 977-1001.
40. Lantry, B., and D.J. Stewart. 1993. Ecological energetics of rainbow smelt in the Laurentian Great Lakes: an interlake comparison. Trans. Am. Fish. Soc. 122: 951-976.
39. Fontaine, T., and D.J. Stewart. 1992. Exploring the effects of multiple management objectives and exotic species on Great Lakes foodwebs and contaminant dynamics. Environ. Manage. 16: 225-229.
38. Brandt, S.B., D.M. Mason, V. Patrick, R.L. Argyle, L. Wells, P.A. Unger, and D.J. Stewart. 1991. Acoustic measures of abundance and size of pelagic planktivores in Lake Michigan. Can. J. Fish. Aquat. Sci. 48: 894-908.
37. Stewart, D.J., and M. Ibarra. 1991. Predation and production by salmonine fishes in Lake Michigan, 1978-1988. Can. J. Fish. Aquat. Sci. 48: 909-922.
36. Sprules, W.G., S. Brandt, D. Stewart, M. Munawar, E. Jin, and J. Love. 1991. Biomass size structure of the Lake Michigan pelagic food web. Can. J. Fish. Aquat. Sci. 48: 105-115.
35. Fontaine, T.D., and D.J. Stewart. 1990. Trophic dynamics and ecosystem integrity in the Great Lakes: past, present and possibilities, p. 153-167. In: C.J. Edwards and H.A. Regier (eds.). An ecosystem approach to the integrity of the Great Lakes in turbulent times. Great Lakes Fish. Comm. Spec. Pub. 90-4.
34. Beauchamp, D.A., D.J. Stewart, and G.L. Thomas. 1989. Corroboration of a bioenergetics model for sockeye salmon. Trans. Am. Fish. Soc. 118: 597-607.
33. Hewett, S., and D.J. Stewart. 1989. Zooplanktivory by alewife in Lake Michigan: ontogenetic, seasonal and historical patterns. Trans. Am. Fish. Soc. 118: 581-596.
32. Ibarra, M., and D.J. Stewart. 1989. Longitudinal zonation of sandy beach fishes in the Napo River basin, eastern Ecuador. Copeia 1989: 364-381.
31. Stewart, D.J., R. Barriga-Salazar, and M. Ibarra. 1987. Ictiofauna de la cuenca del rio Napo, Ecuador oriental: lista anotada de especies. Politecnica, Ser. Biol. 1: 9-63.
30. Ibarra, M., and D.J. Stewart. 1987. Catalogue of type specimens of Recent fishes in the Field Museum of Natural History. Fieldiana: Zool., New Ser., No. 35, 112 pp.
29. Stewart, D.J., and F.P. Binkowski. 1986. Dynamics of consumption and food conversion by Lake Michigan alewives: an energetics-modeling synthesis. Trans. Am. Fish. Soc. 115: 643-661. [MOST SIGNIFICANT PAPER IN TRANSACTIONS, 1986]
28. Stewart, D.J. 1986. A new pimelodid catfish from the deep-river channel of the Rio Napo, eastern Ecuador (Pisces: Pimelodidae). Proc. Acad. nat. Sci. Phil. 138:46-52.
27. Stewart, D. J. 1986. Revision of Pimelodina and description of a new genus and species from the Peruvian Amazon (Pisces: Pimelodidae). Copeia 1986: 653-672.
26. Leslie, A.J., and D.J. Stewart. 1986. Systematics and distributional ecology of Etropus (Pisces, Bothidae) on the Atlantic coast of the United States, with description of a new species. Copeia 1986: 140-156.
25. Stewart, D.J. 1985. A review of the South American catfish tribe Hoplomyzontini (Pisces, Aspredinidae) with descriptions of new species from Ecuador. Fieldiana: Zoology, New Series, No. 25, 19 pp.
24. Stewart, D. J., and M.J. Pavlik. 1985. Revision of Cheirocerus (Pisces: Pimelodidae) from tropical freshwaters of South America. Copeia 1985: 356-367.
23. Stewart, D.J. 1985. A new species of Cetopsorhamdia (Pisces: Pimelodidae) from the Rio Napo Basin of Eastern Ecuador. Copeia 1985: 339-344.
22. Bailey, R.M., and D.J. Stewart. 1984. Bagrid catfishes from Lake Tanganyika, with a key and descriptions of new taxa. Misc. Publ. Mus. Zool., Univ. Mich. 168: 1-41.
21. Stewart, D.J., and T.R. Roberts. 1984. A new species of dwarf cichlid fish with reversed sexual dichromatism from Lac Mai-ndombe, Zaire. Copeia 1984: 82-86.
20. Balon, E.K., and D.J. Stewart. 1983. Fish assemblages in a river with unusual gradient (Luongo, Africa - Zaire system), reflections on river zonation, and description of another new species. Envir. Biol. Fish. 9: 225-252.
19. Bailey, R.M., and D.J. Stewart. 1983. Bagrus Bosc, 1816 (Pisces, Siluriformes): proposal to place on the official list. Z.N.(S.)2371. Bull. Zool. Nom. 40: 167-172.
18. Stewart, D. J., D. Weininger, D.V. Rottiers, and T.A. Edsall. 1983. An energetics model for lake trout, Salvelinus namaycush: application to the Lake Michigan population. Can. J. Fish. Aquat. Sci. 40: 681-698.
17. Magnuson, J.J., C.L. Harrington, D.J. Stewart, and G.N. Herbst. 1981. Responses of macrofauna to short-term dynamics of a Gulf Stream front on the continental shelf, pp. 441-448, In: F.A. Richards (ed.). Coastal Upwelling. Coastal and Estuarine Studies 1, American Geophysical Union, Washington, D.C.
16. Stewart, D.J., J.F. Kitchell and L.B. Crowder. 1981. Forage fishes and their salmonid predators in Lake Michigan. Trans. Am. Fish. Soc. 110 : 751-763.
[MOST SIGNIFICANT PAPER IN TRANSACTIONS, 1981]
15. Magnuson, J.J., S.B. Brandt, and D.J. Stewart. 1980. Habitat preferences and fishery oceanography, pp. 371-382. In: J.E. Bardach, J.J. Magnuson, R.C. May, and J.M. Reinhart (eds.). Fish Behavior and Its Use in the Capture and Culture of Fishes. International Center for Living Aquatic Resources Management, Manila.
14. Poll, M., and D.J. Stewart. 1977. Un nouveau Lamprologus du sud du Lac Tanganika (Zambia) (Pisces, Cichlidae). Rev. Zool. afr. 91: 1049-1056.
13. Kitchell, J.F., D.J. Stewart, and D. Weininger. 1977. Applications of a bioenergetics model to yellow perch (Perca flavescens) and walleye (Stizostedion vitreum vitreum). J. Fish. Res. Board Can. 34: 1922-1935.
12. Bailey, R.M., and D.J. Stewart. 1977. Cichlid fishes from Lake Tanganyika: additions to the Zambian fauna including two new species. Occ. Pap. Mus. Zool., Univ. Mich. 679: 1-30.
11. Stewart, D. J. 1977. Geographic variation in Barbus radiatus Peters, a widely distributed African cyprinid fish. Envir. Biol. Fish. 1: 113-125.
10. Liem, K.F., and D.J. Stewart. 1976. Evolution of the scale-eating cichlid fishes of Lake Tanganyika: A generic revision with a description of a new species. Bull. Mus. Comp. Zool. 147: 319-350.
9. Roberts, T., and D.J. Stewart. 1976. An ecological and systematic survey of fishes in the rapids of the Zaire or Congo River. Bull. Mus. Comp. Zool. 147: 239-317.
8. Poll, M., and D.J. Stewart. 1975. A new cichlid fish of the genus Xenotilapia from Lake Tanganyika, Zambia (Pisces, Cichlidae). Rev. Zool. afr. 89: 919-924.
7. Trewavas, E., and D.J. Stewart. 1975. A new species of Tilapia (Pisces, Cichlidae) in the Zambian Zaire system. Bull. Br. Mus. Nat. Hist. (Zool.) 28: 191-197.
6. Stewart, D.J., and P.J. Rago. 1975. Experimental design and statistical considerations for monitoring fish populations, pp. 3-23. In: Inshore Lake Michigan fish populations near the Donald C. Cook Nuclear Power Plant, 1973. D.J. Jude, et al., Special Report No. 52, Gr. Lk. Res. Div., Univ. Mich., Ann Arbor, MI. 267 pp.
5. Poll, M, and D.J. Stewart. 1975. Un Mochocidae et un Kneriidae nouveaux de la riviere Luongo (Zambia), affluent du basin du Congo (Pisces). Rev. Zool. afr. 89: 151-158.
4. Stewart, D.J., and R.A. Stein. 1974. Short-term fate of dietary dieldrin in the digestive tract of juvenile lake trout (Salvelinus namaycush). Bull. Envir. Contam. Toxicology 11: 563-566.
3. Lagler, K.F., J.M. Kapetsky, and D.J. Stewart. 1972. Mekong Fishery Survey-Study Plan. Resource Development Associates, Ann Arbor, Michigan. 178 pp.
2. Reinert, R.E., H.L. Seagran and D.J. Stewart. 1972. Effects of dressing and cooking on DDT concentrations in certain fish from Lake Michigan. J. Fish. Res. Board Can. 29: 525-529.
1. Lagler, K.F., J.F. Kapetski , and D.J. Stewart. 1971. The fisheries of the Kafue River Flats, Zambia, in relation to the Kafue Gorge Dam. Technical Report 1, Central Fisheries Research Institute, Chilanga, Zambia. 161 pp.