Stephen Trumbo

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[[Image:Trumbo_Steve.jpg|right|200px]] [[Image:feed solitary.jpg|left|250px]] <span style="font-size: large"> Welcome </span> to the homepage of Stephen Trumbo. I am interested in the integration of ecological, physiological and evolutionary approaches to animal behavior. Our primary experimental organisms (burying beetles) allow easy manipulation of reproduction, parental care, competition and hormonal state. Student projects at the Waterbury campus are primarily geared to undergraduates, although collaboration with graduate students from other campuses also has been possible. Current research projects can be found below.
 
[[Image:Trumbo_Steve.jpg|right|200px]] [[Image:feed solitary.jpg|left|250px]] <span style="font-size: large"> Welcome </span> to the homepage of Stephen Trumbo. I am interested in the integration of ecological, physiological and evolutionary approaches to animal behavior. Our primary experimental organisms (burying beetles) allow easy manipulation of reproduction, parental care, competition and hormonal state. Student projects at the Waterbury campus are primarily geared to undergraduates, although collaboration with graduate students from other campuses also has been possible. Current research projects can be found below.
 
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==Research Projects==
 
==Research Projects==
  
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===''Nicrophorus pustulatus'' as a parasitoid of snakes===
 
===''Nicrophorus pustulatus'' as a parasitoid of snakes===
[[Image:pustulatus pheromone.jpg |thumb|120px|left|N. pustulatus male releasing pheromone from a snake egg]][[Image:sikes2.jpg |thumb|200px|right|Derek Sikes collecting Nicrophorus on a badger carcass in Alaska]] ''N. pustulatus'' has been an enigmatic species of burying beetle because it was never found breeding on a small carcass. Drs. Gabriel Blouin-Demers and Patrick Weatherhead (University of Illinois-Urbana) found ''N. pustulatus'' adults and larvae in the nests of the black rat snake (''Elaphe obsoleta''). Working in our lab, '''Garrison Smith''' (M.S., University of Arizona) determined that this species is well adapted to exploiting reptile eggs using many of the same behaviors that congeners use when exploiting carcasses (see September, 2009 issue of ''Natural History''). The closest phylogenetic relatives of ''N. pustulatus'' (determined by '''Derek Sikes''', University of Alaska-Fairbanks Museum) have not been studied so it is unknown whether additional nicrophorine species act as parasitoids of reptiles.  
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[[Image:pustulatus pheromone.jpg |thumb|120px|left|N. pustulatus male releasing pheromone from a snake egg]][[Image:sikes2.jpg |thumb|200px|right|Derek Sikes collecting Nicrophorus on a badger carcass in China]] ''N. pustulatus'' has been an enigmatic species of burying beetle because it was never found breeding on a small carcass. Drs. Gabriel Blouin-Demers and Patrick Weatherhead (University of Illinois-Urbana) found ''N. pustulatus'' adults and larvae in the nests of the black rat snake (''Elaphe obsoleta''). Working in our lab, '''Garrison Smith''' (M.S., University of Arizona) determined that this species is well adapted to exploiting reptile eggs using many of the same behaviors that congeners use when exploiting carcasses (see September, 2009 issue of ''Natural History''). The closest phylogenetic relatives of ''N. pustulatus'' (determined by '''Derek Sikes''', University of Alaska-Fairbanks Museum) have not been studied so it is unknown whether additional nicrophorine species act as parasitoids of reptiles.  
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'''Reviews'''<br>
 
'''Reviews'''<br>
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Trumbo, S.T. 2012. Patterns of parental care in invertebrates. In: The Evolution of Parental Care (eds., Royle, N.J., Smiseth, P.T., Kölliker, M), pp.81-100. Oxford University Press, Oxford.
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Trumbo, S.T. 2007. Can the challenge hypothesis be applied to insects? ''Hormones and Behavior'' 51: 281-285. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/2007-H&B.pdf}}
  
 
Trumbo, S.T. 2002. Hormonal regulation of parental behavior in insects. In: Hormones, Brain and Behavior, Volume 3 (eds., Pfaff, D.W., Arnold, A.P., Etgen, A.M., Fahrbach, S.E., Moss, R.L., Rubin, R.R.), pp. 115-139. Academic Press, New York.
 
Trumbo, S.T. 2002. Hormonal regulation of parental behavior in insects. In: Hormones, Brain and Behavior, Volume 3 (eds., Pfaff, D.W., Arnold, A.P., Etgen, A.M., Fahrbach, S.E., Moss, R.L., Rubin, R.R.), pp. 115-139. Academic Press, New York.
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{{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/2002-HormBrBehav-chapter.pdf}}
  
Trumbo, S.T. 1999. Using integrative biology to explore constraints on evolution. ''Trends in Ecology & Evolution'' 14: 5-6.
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Trumbo, S.T. 1999. Using integrative biology to explore constraints on evolution. ''Trends in Ecology & Evolution'' 14: 5-6. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/1999-TREE.pdf}}
  
Trumbo, S.T. 1997. Juvenile hormone-mediated reproduction in burying beetles: from behavior to physiology. ''Archives of Insect Biochemistry and Physiology'' 35: 479-490.
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Trumbo, S.T. 1997. Juvenile hormone-mediated reproduction in burying beetles: from behavior to physiology. ''Archives of Insect Biochemistry and Physiology'' 35: 479-490. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/1997-ArchInsBiochem.pdf}}
  
Trumbo, S.T. 1996. Parental care in invertebrates. ''Advances in the Study of Behavior'' 25: 3-51.
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Trumbo, S.T. 1996. Parental care in invertebrates. ''Advances in the Study of Behavior'' 25: 3-51. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/1996-AdStBehav.pdf}}
  
  
 
'''Research'''<br>
 
'''Research'''<br>
  
Trumbo, S.T. 2009. Age-related reproductive performance in the parental burying beetle, ''Nicrophorus orbicollis''. ''Behavioral Ecology'' 20: 951-956.
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Trumbo, S.T. 2012. Contest behavior and other reproductive efforts in aging breeders: a test of residual reproductive value and state-dependent models. "Behavioral Ecology and Sociobiology" DOI 10.1007/s00265-012-1406-4.
  
Trumbo, S.T. 2009. Naturalist at Large: From Gravedigger to Assassin. ''Natural History'' September 24-25.
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Trumbo, S.T. 2009. Age-related reproductive performance in the parental burying beetle, ''Nicrophorus orbicollis''. ''Behavioral Ecology'' 20: 951-956. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/2009-BE-age.pdf}}
  
Sikes, D.S., Vamosi, S.M., Trumbo, S.T., Ricketts, M. and Venables, C. 2008. Molecular systematics and biogeography of Nicrophorus in part - the ''investigator'' species group (Coleoptera: Silphidae) using mixture model MCMC. ''Molecular Phylogenetics and Evolution'' 48: 646-666.
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Trumbo, S.T. 2009. Naturalist at Large: From Gravedigger to Assassin. ''Natural History'' September 24-25. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/2009-TrumboNaturalist.pdf}}
  
Trumbo, S.T. & Robinson, G.E. 2008. Social and nonsocial stimuli and juvenile hormone titer in a male burying beetle, ''Nicrophorus orbicollis''. J''ournal of Insect Physiology'' 54: 630-635.
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Sikes, D.S., Vamosi, S.M., Trumbo, S.T., Ricketts, M. and Venables, C. 2008. Molecular systematics and biogeography of Nicrophorus in part - the ''investigator'' species group (Coleoptera: Silphidae) using mixture model MCMC. ''Molecular Phylogenetics and Evolution'' 48: 646-666.
  
Smith, G., Trumbo, S.T., Sikes, D.S., Scott, M.P. & Smith, R.L. 2007. Host shift by the burying beetle, ''Nicrophorus pustulatus'', a parasitoid of snake eggs. ''Journal of Evolutionary Biology'' 20: 2389-2399.
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Trumbo, S.T. & Robinson, G.E. 2008. Social and nonsocial stimuli and juvenile hormone titer in a male burying beetle, ''Nicrophorus orbicollis''. J''ournal of Insect Physiology'' 54: 630-635. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/2008-JIP.pdf}}
  
Trumbo, S.T. 2007. Defending young biparentally: female risk-taking with and without a male in the burying beetle, ''Nicrophorus pustulatus''. ''Behavioral Ecology and Sociobiology'' 61: 1717-1723.
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Smith, G., Trumbo, S.T., Sikes, D.S., Scott, M.P. & Smith, R.L. 2007. Host shift by the burying beetle, ''Nicrophorus pustulatus'', a parasitoid of snake eggs. ''Journal of Evolutionary Biology'' 20: 2389-2399.  {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/2007-JEB.pdf}}
  
Trumbo, S.T. & Valletta, R.C. 2007. The costs of confronting infanticidal intruders in a burying beetle. ''Ethology'' 113: 386-393.
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Trumbo, S.T. 2007. Defending young biparentally: female risk-taking with and without a male in the burying beetle, ''Nicrophorus pustulatus''. ''Behavioral Ecology and Sociobiology'' 61: 1717-1723. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/2007-BES.pdf}}
  
Trumbo, S.T. 2007. Can the challenge hypothesis be applied to insects? ''Hormones and Behavior'' 51: 281-285.
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Trumbo, S.T. & Valletta, R.C. 2007. The costs of confronting infanticidal intruders in a burying beetle. ''Ethology'' 113: 386-393. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/2007-ethology.pdf}}
  
Sikes, D.S., Madge, R.B. & Trumbo, S.T. 2006. Revision of ''Nicrophorus'' in part: new species and inferred phylogeny of the ''nepalensis''-group based on evidence from morphology and mitochondrial DNA (Coleoptera: Silphidae: Nicrophorinae). ''Invertebrate Systematics'' 20: 305-366.
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Sikes, D.S., Madge, R.B. & Trumbo, S.T. 2006. Revision of ''Nicrophorus'' in part: new species and inferred phylogeny of the ''nepalensis''-group based on evidence from morphology and mitochondrial DNA (Coleoptera: Silphidae: Nicrophorinae). ''Invertebrate Systematics'' 20: 305-366. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/2006-invertsysematics-sikes,madge,trumbo.pdf}}
  
Trumbo, S.T. 2006. Infanticide, sexual selection and task specialization in a biparental burying beetle. ''Animal Behaviour'' 72: 1159-1167.
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Trumbo, S.T. 2006. Infanticide, sexual selection and task specialization in a biparental burying beetle. ''Animal Behaviour'' 72: 1159-1167. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/2006-animalbehaviour.pdf}}
  
Suzuki, S., Nagano, M. & Trumbo, S.T. 2005. Intrasexual competition and mating behavior in ''Ptomascopus morio'' (Coleoptera: Silphidae: Nicrophorinae). ''Journal of Insect Behavior'' 18: 233-242.
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Suzuki, S., Nagano, M. & Trumbo, S.T. 2005. Intrasexual competition and mating behavior in ''Ptomascopus morio'' (Coleoptera: Silphidae: Nicrophorinae). ''Journal of Insect Behavior'' 18: 233-242. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/2005-ptomascopus-suzuki.pdf}}
  
Trumbo, S.T. & Robinson, G.E. 2004. Nutrition, hormones and life history in burying beetles. ''Journal of Insect Physiology'' 50: 383-391.
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Trumbo, S.T. & Robinson, G.E. 2004. Nutrition, hormones and life history in burying beetles. ''Journal of Insect Physiology'' 50: 383-391. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/2004-JIP.pdf}}
  
Trumbo, S.T. & Bloch, P.L. 2002. Competition between ''Nicrophorus orbicollis'' and ''Nicrophorus defodiens'': resource locating efficiency and temporal partitioning. ''Northeastern Naturalist'' 9: 13-26.
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Trumbo, S.T. & Bloch, P.L. 2002. Competition between ''Nicrophorus orbicollis'' and ''Nicrophorus defodiens'': resource locating efficiency and temporal partitioning. ''Northeastern Naturalist'' 9: 13-26. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/2002-N-Nat.pdf}}
  
Trumbo, S.T., Kon, M. & Sikes, D.S. 2001. The reproductive biology of ''Ptomascopus morio'', a brood parasite of ''Nicrophorus'' . ''Journal of Zoology, London'' 255: 543-560.
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Trumbo, S.T., Kon, M. & Sikes, D.S. 2001. The reproductive biology of ''Ptomascopus morio'', a brood parasite of ''Nicrophorus'' . ''Journal of Zoology, London'' 255: 543-560. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/2001-JZoology.pdf}}
  
Scott. M.P., Trumbo, S.T., Neese, P.A., Bailey, W.D. & Roe, R.M. 2001. Changes in biosynthesis and degradation of juvenile hormone during breeding by burying beetles: a reproductive or social role? ''Journal of Insect Physiology'' 47: 295-302.
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Scott. M.P., Trumbo, S.T., Neese, P.A., Bailey, W.D. & Roe, R.M. 2001. Changes in biosynthesis and degradation of juvenile hormone during breeding by burying beetles: a reproductive or social role? ''Journal of Insect Physiology'' 47: 295-302. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/2001-JIP.pdf}}
  
Trumbo, S.T. & Bloch, P.L. 2000. Habitat fragmentation and burying beetle (Coleoptera: Silphidae) communities. ''Journal of Insect Conservation'' 4: 245-252 .
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Trumbo, S.T. & Bloch, P.L. 2000. Habitat fragmentation and burying beetle (Coleoptera: Silphidae) communities. ''Journal of Insect Conservation'' 4: 245-252 . {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/2000-JIConservation.pdf}}
  
Trumbo, S.T. & Sikes, D.S. 2000. Sexual selection and leg morphology in ''Nicrophorus orbicollis'' and ''Ptomascopus morio''. ''Entomological Science'' 3: 585-590.
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Trumbo, S.T. & Sikes, D.S. 2000. Sexual selection and leg morphology in ''Nicrophorus orbicollis'' and ''Ptomascopus morio''. ''Entomological Science'' 3: 585-590. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/2000-EntomolSci.pdf}}
  
Trumbo, S.T. & Thomas, S. 1998. Burying beetles of the Apostle Islands, Wisconsin: species diversity, population density and body size. ''Great Lakes Entomologist'' 31: 85-95.
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Trumbo, S.T. & Thomas, S. 1998. Burying beetles of the Apostle Islands, Wisconsin: species diversity, population density and body size. ''Great Lakes Entomologist'' 31: 85-95. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/1998-GrLakesEntomol.pdf}}
  
Trumbo, S.T., Huang, Z-Y. & Robinson, G.E. 1997. Division of labor between undertaker specialists and other middle-age honey bees. ''Behavioral Ecology and Sociobiology'' 41: 151-163.
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Trumbo, S.T., Huang, Z-Y. & Robinson, G.E. 1997. Division of labor between undertaker specialists and other middle-age honey bees. ''Behavioral Ecology and Sociobiology'' 41: 151-163. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/1997-BES.pdf}}
  
Trumbo, S.T. & Robinson, G.E. 1997. Learning and task interference by undertaking specialists in honey bee colonies. ''Ethology'' 103: 966-975.
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Trumbo, S.T. & Robinson, G.E. 1997. Learning and task interference by undertaking specialists in honey bee colonies. ''Ethology'' 103: 966-975. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/1997-Ethology.pdf}}
  
Trumbo, S.T., Borst, D.W. & Robinson, G.E. 1995. Rapid elevation of JH titre during behavioural assessment of the breeding resource by the burying beetle Nicrophorus orbicollis. ''Journal of Insect Physiology'' 41: 535-543.
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Trumbo, S.T., Borst, D.W. & Robinson, G.E. 1995. Rapid elevation of JH titre during behavioural assessment of the breeding resource by the burying beetle Nicrophorus orbicollis. ''Journal of Insect Physiology'' 41: 535-543. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/1995-JIP.pdf}}
  
Trumbo, S.T. & Fernandez, A.G. 1995. Regulation of brood size by male parents and cues employed to assess resource size by burying beetles. ''Ethology Ecology & Evolution'' 7: 313-322.
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Trumbo, S.T. & Fernandez, A.G. 1995. Regulation of brood size by male parents and cues employed to assess resource size by burying beetles. ''Ethology Ecology & Evolution'' 7: 313-322. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/1995-EEE.pdf}}
  
Trumbo, S.T. 1995. Nesting failure in burying beetles and the origin of communal associations. ''Evolutionary Ecology'' 9: 125-130.
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Trumbo, S.T. 1995. Nesting failure in burying beetles and the origin of communal associations. ''Evolutionary Ecology'' 9: 125-130. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/1995-EvolEcol.pdf}}
  
Trumbo, S.T. & Fiore, A.J. 1994. Interspecific competition and the evolution of communal breeding in burying beetles. ''American Midland Naturalist'' 131: 169-174.
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Trumbo, S.T. & Fiore, A.J. 1994. Interspecific competition and the evolution of communal breeding in burying beetles. ''American Midland Naturalist'' 131: 169-174. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/1994-AMN.pdf}}
  
Trumbo, S.T. 1994. Interspecific competition, brood parasitism, and the evolution of biparental cooperation in burying beetles. ''Oikos'' 69: 241-249.
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Trumbo, S.T. 1994. Interspecific competition, brood parasitism, and the evolution of biparental cooperation in burying beetles. ''Oikos'' 69: 241-249. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/1994-Oikos.pdf}}
  
Trumbo, S.T. & Eggert, A.-K. 1994. Beyond monogamy: territory quality influences sexual advertisement in male burying beetles. ''Animal Behaviour'' 48: 1043-1047.
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Trumbo, S.T. & Eggert, A.-K. 1994. Beyond monogamy: territory quality influences sexual advertisement in male burying beetles. ''Animal Behaviour'' 48: 1043-1047. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/1994-AnimBehav.pdf}}
  
Trumbo, S.T. & Wilson, D.S. 1993. Brood discrimination, nestmate discrimination and determinants of social behavior in facultatively quasisocial beetles (''Nicrophorus'' spp.). ''Behavioral Ecology'' 4: 332-339.
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Trumbo, S.T. & Wilson, D.S. 1993. Brood discrimination, nestmate discrimination and determinants of social behavior in facultatively quasisocial beetles (''Nicrophorus'' spp.). ''Behavioral Ecology'' 4: 332-339. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/1993-BehEcol.pdf}}
  
Trumbo, S.T. 1992. Monogamy to communal breeding: exploitation of a broad resource base in burying beetles (Silphidae: ''Nicrophorus''). ''Ecological Entomology'' 17: 289-297.
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Trumbo, S.T. 1992. Monogamy to communal breeding: exploitation of a broad resource base in burying beetles (Silphidae: ''Nicrophorus''). ''Ecological Entomology'' 17: 289-297. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/1992-EcolEntomol.pdf}}
  
Trumbo, S.T. 1991. Reproductive benefits and the duration of paternal care in a biparental burying beetle, ''Necrophorus orbicollis''. ''Behaviour'' 117: 82-105.
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Trumbo, S.T. 1991. Reproductive benefits and the duration of paternal care in a biparental burying beetle, ''Necrophorus orbicollis''. ''Behaviour'' 117: 82-105. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/1991-Behaviour.pdf}}
  
Trumbo, S.T. & Fiore, A.J. 1991. A genetic marker for investigating paternity and maternity in the burying beetle ''Nicrophorus orbicollis'' (Coleoptera: Silphidae) . ''Journal of the New York Entomological Society'' 99: 637-642.
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Trumbo, S.T. & Fiore, A.J. 1991. A genetic marker for investigating paternity and maternity in the burying beetle ''Nicrophorus orbicollis'' (Coleoptera: Silphidae) . ''Journal of the New York Entomological Society'' 99: 637-642. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/1991-JNYEntomolSoc.pdf}}
  
Trumbo, S.T. 1990. Interference competition among burying beetles (Silphidae, ''Nicrophorus''). ''Ecological Entomology'' 15: 347-355.
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Trumbo, S.T. 1990. Interference competition among burying beetles (Silphidae, ''Nicrophorus''). ''Ecological Entomology'' 15: 347-355. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/1990-EcolEntomol.pdf}}
  
Trumbo, S.T. 1990. Reproductive benefits of infanticide in a biparental burying beetle, ''Nicrophorus orbicollis''. ''Behavioral Ecology and Sociobiology'' 27: 269-273.
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Trumbo, S.T. 1990. Reproductive benefits of infanticide in a biparental burying beetle, ''Nicrophorus orbicollis''. ''Behavioral Ecology and Sociobiology'' 27: 269-273. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/1990-BES.pdf}}
  
Trumbo, S.T. 1990. Reproductive success, phenology and biogeography of burying beetles (Silphidae, ''Nicrophorus''). ''American Midland Naturalist'' 124: 1-11.
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Trumbo, S.T. 1990. Reproductive success, phenology and biogeography of burying beetles (Silphidae, ''Nicrophorus''). ''American Midland Naturalist'' 124: 1-11. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/1990-AmMidlNat.pdf}}
  
Trumbo, S.T. 1990. Regulation of brood size in a burying beetle, Nicrophorus tomentosus (Silphidae). ''Journal of Insect Behavior'' 3: 491-500.
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Trumbo, S.T. 1990. Regulation of brood size in a burying beetle, Nicrophorus tomentosus (Silphidae). ''Journal of Insect Behavior'' 3: 491-500. {{pdf|http://hydrodictyon.eeb.uconn.edu/people/trumbo/1990-JIB.pdf}}
  
  
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Trumbo, S.T. 2000. Introducing students to the genetic information age. ''The American Biology Teacher'' 62: 259-261.
 
Trumbo, S.T. 2000. Introducing students to the genetic information age. ''The American Biology Teacher'' 62: 259-261.
  
Trumbo, S.T.  1996. The role of conflict in breeding systems: burying beetles as experimental organisms. ''The American Biology Teacher'' 58: 118-121.
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Trumbo, S.T.  1996. The role of conflict in breeding systems: burying beetles as experimental organisms. ''The American Biology Teacher'' 58: 118-121.
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==Images of burying beetles==
 
==Images of burying beetles==
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Image:Ptomascopus and Nicrophorus adults.jpg |''Ptomascopus morio'' compared to ''Nicrophorus''
 
Image:Ptomascopus and Nicrophorus adults.jpg |''Ptomascopus morio'' compared to ''Nicrophorus''
 
Image:ptoma-larva.jpg |''Ptomascopus'' larva
 
Image:ptoma-larva.jpg |''Ptomascopus'' larva
Image:Silpha and Nicrophorus larvae.jpg |''Nicrophorus'' and ''Silpha'' larvae
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Image:Silpha and Nicrophorus larvae.jpg |''Nicrophorus'' and ''Silphinae'' larvae
 
Image:punctured larva-2.jpg |Larva killed but not cannibalized by intruder
 
Image:punctured larva-2.jpg |Larva killed but not cannibalized by intruder
 
Image:pustulatus larvae.jpg |Small ''N. pustulatus'' brood in a single snake egg
 
Image:pustulatus larvae.jpg |Small ''N. pustulatus'' brood in a single snake egg
 
</gallery>
 
</gallery>
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==Video of burying beetles==
 
==Video of burying beetles==
  
From Our Lab:
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'''From Our Lab:''' Video from our lab may be used for noncommercial educational purposes. <br>
[http://www.youtube.com/watch?v=yRarHKpOf_8/ Parental care and brood reduction in ''Nicrophorus orbicollis'']
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Parental care and brood reduction in ''Nicrophorus orbicollis''  http://www.youtube.com/watch?v=yRarHKpOf_8
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''Nicrophorus pustulatus'' exploiting a snake egg  http://www.youtube.com/watch?v=Zy2vxstcWiQ
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Infanticidal takeover of a carcass  http://www.youtube.com/watch?v=CQ9fFslNx_E&NR=1
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'''Other Video:'''
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Theatrical view of burying beetles  http://www.youtube.com/watch?v=enazNu0YgPs
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National Geographic view of burying beetles  http://www.youtube.com/watch?v=CUOPx1q5bjk
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American Burying Beetle - Saint Louis Zoo  http://www.youtube.com/watch?v=H75rJGLaSNk
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Tracking the American Burying Beetle - Saint Louis Zoo  http://www.youtube.com/watch?v=cPJRu-celQ0
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==Websites & Links==
 
==Websites & Links==
Sikes, D. S., S. T. Trumbo, S. B. Peck. 1999. [http://collections2.eeb.uconn.edu/nicroweb/nicrophorus.htm/ Nicrophorus Central] A website developed by Derek Sikes for all things nicrophorine
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Sikes, D. S., S. T. Trumbo, S. B. Peck. 1999. '''Nicrophorus Central''' http://collections2.eeb.uconn.edu/nicroweb/nicrophorus.htm A website developed by Derek Sikes for all things nicrophorine
  
Sikes, D. S., S. T. Trumbo, S. B. Peck. 2005. [http://tolweb.org/tree?group=Silphidae/ Silphidae node on the Tree of Life] Created by Derek Sikes  
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Sikes, D. S., S. T. Trumbo, S. B. Peck. 2005. '''Silphidae node on the Tree of Life'''  http://tolweb.org/tree?group=Silphidae Created by Derek Sikes  
  
 
[[Image:sikes1.jpg |thumb|200px|left|Derek Sikes]] <br>
 
[[Image:sikes1.jpg |thumb|200px|left|Derek Sikes]] <br>
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[http://bugguide.net/node/view/4954/bgimage?from=0/ BugGuide of Nicrophorus] Iowa State University Entomology
 
[http://bugguide.net/node/view/4954/bgimage?from=0/ BugGuide of Nicrophorus] Iowa State University Entomology
  
Hoback, W.W., Snethen, D.G., Brust, M.L. [http://www.lopers.net/student_org/NebraskaInverts/cbeetles/Genera/nicrophorus/home.htm/ Carrion Beetles of Nebraska] University of Nebraska at Kearney
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Hoback, W.W., Snethen, D.G., Brust, M.L. http://www.lopers.net/student_org/NebraskaInverts/cbeetles/Genera/nicrophorus/home.htm
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Carrion Beetles of Nebraska developed at the University of Nebraska at Kearney
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==Contact Information==
 
==Contact Information==
[[Image:Trumbo-family.jpg |thumb|200px|right|Biparental care required]]
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[[Image:Trumbo-family.jpg |thumb|200px|right|Steve Trumbo and family, 2007]]
  
 
'''Office:''' Waterbury 307 / [[TLS]] 83<br>
 
'''Office:''' Waterbury 307 / [[TLS]] 83<br>

Revision as of 16:05, 13 September 2012

Professor (Ph.D., University of North Carolina, Chapel Hill) trumbo@uconn.edu

Trumbo Steve.jpg
Feed solitary.jpg
Welcome to the homepage of Stephen Trumbo. I am interested in the integration of ecological, physiological and evolutionary approaches to animal behavior. Our primary experimental organisms (burying beetles) allow easy manipulation of reproduction, parental care, competition and hormonal state. Student projects at the Waterbury campus are primarily geared to undergraduates, although collaboration with graduate students from other campuses also has been possible. Current research projects can be found below.



Contents

Research Projects

Aging

There have been three primary approaches to the study of aging: evolutionary ecology asks why and when we senesce, molecular biology examines the cellular mechanisms of aging, and behavioral ecology addresses how aging affects reproductive effort. We are examining how reproductive effort and performance vary with age, and whether all components of reproduction are similarly altered. Burying beetles provide a useful model because alternative hypotheses for improvements with age (more experience and the loss of less fit individuals from the older cohort) can be controlled easily in the laboratory.


Juvenile hormone

Parent regurgitating to larvae
Juvenile hormone (JH) has numerous physiological and behavioral effects in larval and adult insects. In burying beetles, high levels of JH are correlated with periods of intense parental activity. Manipulation of JH levels, however, seems to have minimal effects on care-giving. In collaboration with Dr. Claudia Rauter (University of Nebraska-Omaha), we are broadening the study of JH to include JH effects on metabolic rates, which are known to vary predictably during the parental cycle.


Microbiology of carcass preparation

Gram stain of anal secretion
Paula Philbrick
Burying beetles are thought to control the decomposition of a small carcass by burying, removing hair or feathers, rounding, and applying antimicrobial anal and oral secretions. These secretions, however, are loaded with their own particular microbial community that will proliferate once on the carcass. Working with Dr. Paula Philbrick (UConn-Waterbury) we are investigating whether burying beetles are manipulating the microbial community to their advantage rather than simply disinfecting the carcass.


Parental care

Biparental care
Biparental care is increasingly viewed as a conflict. On the other hand, there is much attention to how cooperation can evolve among individuals in groups, particularly in the social insects. I feel that it will be instructive to view these two situations from a common perspective: biparental care as a potentially cooperative effort of two unrelated individuals in which both individuals benefit from greater group productivity (more offspring) while attempting to minimize costs by manipulating the partner to provide more care. As in social insects, specialization may promote stable groups because a deserted individual will not be able to perform nonspecialist tasks as efficiently as its partner.


Nicrophorus pustulatus as a parasitoid of snakes

N. pustulatus male releasing pheromone from a snake egg
Derek Sikes collecting Nicrophorus on a badger carcass in China
N. pustulatus has been an enigmatic species of burying beetle because it was never found breeding on a small carcass. Drs. Gabriel Blouin-Demers and Patrick Weatherhead (University of Illinois-Urbana) found N. pustulatus adults and larvae in the nests of the black rat snake (Elaphe obsoleta). Working in our lab, Garrison Smith (M.S., University of Arizona) determined that this species is well adapted to exploiting reptile eggs using many of the same behaviors that congeners use when exploiting carcasses (see September, 2009 issue of Natural History). The closest phylogenetic relatives of N. pustulatus (determined by Derek Sikes, University of Alaska-Fairbanks Museum) have not been studied so it is unknown whether additional nicrophorine species act as parasitoids of reptiles.




Publications

Reviews

Trumbo, S.T. 2012. Patterns of parental care in invertebrates. In: The Evolution of Parental Care (eds., Royle, N.J., Smiseth, P.T., Kölliker, M), pp.81-100. Oxford University Press, Oxford.

Trumbo, S.T. 2007. Can the challenge hypothesis be applied to insects? Hormones and Behavior 51: 281-285. Pdficon small.gif

Trumbo, S.T. 2002. Hormonal regulation of parental behavior in insects. In: Hormones, Brain and Behavior, Volume 3 (eds., Pfaff, D.W., Arnold, A.P., Etgen, A.M., Fahrbach, S.E., Moss, R.L., Rubin, R.R.), pp. 115-139. Academic Press, New York. Pdficon small.gif

Trumbo, S.T. 1999. Using integrative biology to explore constraints on evolution. Trends in Ecology & Evolution 14: 5-6. Pdficon small.gif

Trumbo, S.T. 1997. Juvenile hormone-mediated reproduction in burying beetles: from behavior to physiology. Archives of Insect Biochemistry and Physiology 35: 479-490. Pdficon small.gif

Trumbo, S.T. 1996. Parental care in invertebrates. Advances in the Study of Behavior 25: 3-51. Pdficon small.gif


Research

Trumbo, S.T. 2012. Contest behavior and other reproductive efforts in aging breeders: a test of residual reproductive value and state-dependent models. "Behavioral Ecology and Sociobiology" DOI 10.1007/s00265-012-1406-4.

Trumbo, S.T. 2009. Age-related reproductive performance in the parental burying beetle, Nicrophorus orbicollis. Behavioral Ecology 20: 951-956. Pdficon small.gif

Trumbo, S.T. 2009. Naturalist at Large: From Gravedigger to Assassin. Natural History September 24-25. Pdficon small.gif

Sikes, D.S., Vamosi, S.M., Trumbo, S.T., Ricketts, M. and Venables, C. 2008. Molecular systematics and biogeography of Nicrophorus in part - the investigator species group (Coleoptera: Silphidae) using mixture model MCMC. Molecular Phylogenetics and Evolution 48: 646-666.

Trumbo, S.T. & Robinson, G.E. 2008. Social and nonsocial stimuli and juvenile hormone titer in a male burying beetle, Nicrophorus orbicollis. Journal of Insect Physiology 54: 630-635. Pdficon small.gif

Smith, G., Trumbo, S.T., Sikes, D.S., Scott, M.P. & Smith, R.L. 2007. Host shift by the burying beetle, Nicrophorus pustulatus, a parasitoid of snake eggs. Journal of Evolutionary Biology 20: 2389-2399. Pdficon small.gif

Trumbo, S.T. 2007. Defending young biparentally: female risk-taking with and without a male in the burying beetle, Nicrophorus pustulatus. Behavioral Ecology and Sociobiology 61: 1717-1723. Pdficon small.gif

Trumbo, S.T. & Valletta, R.C. 2007. The costs of confronting infanticidal intruders in a burying beetle. Ethology 113: 386-393. Pdficon small.gif

Sikes, D.S., Madge, R.B. & Trumbo, S.T. 2006. Revision of Nicrophorus in part: new species and inferred phylogeny of the nepalensis-group based on evidence from morphology and mitochondrial DNA (Coleoptera: Silphidae: Nicrophorinae). Invertebrate Systematics 20: 305-366. Pdficon small.gif

Trumbo, S.T. 2006. Infanticide, sexual selection and task specialization in a biparental burying beetle. Animal Behaviour 72: 1159-1167. Pdficon small.gif

Suzuki, S., Nagano, M. & Trumbo, S.T. 2005. Intrasexual competition and mating behavior in Ptomascopus morio (Coleoptera: Silphidae: Nicrophorinae). Journal of Insect Behavior 18: 233-242. Pdficon small.gif

Trumbo, S.T. & Robinson, G.E. 2004. Nutrition, hormones and life history in burying beetles. Journal of Insect Physiology 50: 383-391. Pdficon small.gif

Trumbo, S.T. & Bloch, P.L. 2002. Competition between Nicrophorus orbicollis and Nicrophorus defodiens: resource locating efficiency and temporal partitioning. Northeastern Naturalist 9: 13-26. Pdficon small.gif

Trumbo, S.T., Kon, M. & Sikes, D.S. 2001. The reproductive biology of Ptomascopus morio, a brood parasite of Nicrophorus . Journal of Zoology, London 255: 543-560. Pdficon small.gif

Scott. M.P., Trumbo, S.T., Neese, P.A., Bailey, W.D. & Roe, R.M. 2001. Changes in biosynthesis and degradation of juvenile hormone during breeding by burying beetles: a reproductive or social role? Journal of Insect Physiology 47: 295-302. Pdficon small.gif

Trumbo, S.T. & Bloch, P.L. 2000. Habitat fragmentation and burying beetle (Coleoptera: Silphidae) communities. Journal of Insect Conservation 4: 245-252 . Pdficon small.gif

Trumbo, S.T. & Sikes, D.S. 2000. Sexual selection and leg morphology in Nicrophorus orbicollis and Ptomascopus morio. Entomological Science 3: 585-590. Pdficon small.gif

Trumbo, S.T. & Thomas, S. 1998. Burying beetles of the Apostle Islands, Wisconsin: species diversity, population density and body size. Great Lakes Entomologist 31: 85-95. Pdficon small.gif

Trumbo, S.T., Huang, Z-Y. & Robinson, G.E. 1997. Division of labor between undertaker specialists and other middle-age honey bees. Behavioral Ecology and Sociobiology 41: 151-163. Pdficon small.gif

Trumbo, S.T. & Robinson, G.E. 1997. Learning and task interference by undertaking specialists in honey bee colonies. Ethology 103: 966-975. Pdficon small.gif

Trumbo, S.T., Borst, D.W. & Robinson, G.E. 1995. Rapid elevation of JH titre during behavioural assessment of the breeding resource by the burying beetle Nicrophorus orbicollis. Journal of Insect Physiology 41: 535-543. Pdficon small.gif

Trumbo, S.T. & Fernandez, A.G. 1995. Regulation of brood size by male parents and cues employed to assess resource size by burying beetles. Ethology Ecology & Evolution 7: 313-322. Pdficon small.gif

Trumbo, S.T. 1995. Nesting failure in burying beetles and the origin of communal associations. Evolutionary Ecology 9: 125-130. Pdficon small.gif

Trumbo, S.T. & Fiore, A.J. 1994. Interspecific competition and the evolution of communal breeding in burying beetles. American Midland Naturalist 131: 169-174. Pdficon small.gif

Trumbo, S.T. 1994. Interspecific competition, brood parasitism, and the evolution of biparental cooperation in burying beetles. Oikos 69: 241-249. Pdficon small.gif

Trumbo, S.T. & Eggert, A.-K. 1994. Beyond monogamy: territory quality influences sexual advertisement in male burying beetles. Animal Behaviour 48: 1043-1047. Pdficon small.gif

Trumbo, S.T. & Wilson, D.S. 1993. Brood discrimination, nestmate discrimination and determinants of social behavior in facultatively quasisocial beetles (Nicrophorus spp.). Behavioral Ecology 4: 332-339. Pdficon small.gif

Trumbo, S.T. 1992. Monogamy to communal breeding: exploitation of a broad resource base in burying beetles (Silphidae: Nicrophorus). Ecological Entomology 17: 289-297. Pdficon small.gif

Trumbo, S.T. 1991. Reproductive benefits and the duration of paternal care in a biparental burying beetle, Necrophorus orbicollis. Behaviour 117: 82-105. Pdficon small.gif

Trumbo, S.T. & Fiore, A.J. 1991. A genetic marker for investigating paternity and maternity in the burying beetle Nicrophorus orbicollis (Coleoptera: Silphidae) . Journal of the New York Entomological Society 99: 637-642. Pdficon small.gif

Trumbo, S.T. 1990. Interference competition among burying beetles (Silphidae, Nicrophorus). Ecological Entomology 15: 347-355. Pdficon small.gif

Trumbo, S.T. 1990. Reproductive benefits of infanticide in a biparental burying beetle, Nicrophorus orbicollis. Behavioral Ecology and Sociobiology 27: 269-273. Pdficon small.gif

Trumbo, S.T. 1990. Reproductive success, phenology and biogeography of burying beetles (Silphidae, Nicrophorus). American Midland Naturalist 124: 1-11. Pdficon small.gif

Trumbo, S.T. 1990. Regulation of brood size in a burying beetle, Nicrophorus tomentosus (Silphidae). Journal of Insect Behavior 3: 491-500. Pdficon small.gif


Pedagogical

Trumbo, S.T., Smith, G., Sikes, D.S. 2005. Number vs. body size of offspring in biparental burying beetles. In: Learning the Skills of Research: Animal Behavior Exercises in the Laboratory and Field (eds., Jakob, E.M. & Hodge, M.). Compact Disc. Sinauer, New York (2nd edition, 2009).

Trumbo, S.T. 2000. Introducing students to the genetic information age. The American Biology Teacher 62: 259-261.

Trumbo, S.T. 1996. The role of conflict in breeding systems: burying beetles as experimental organisms. The American Biology Teacher 58: 118-121.

Images of burying beetles

All images of beetles on this webpage may be used for noncommercial educational purposes. Click on thumbnail for higher resolution image.



Video of burying beetles

From Our Lab: Video from our lab may be used for noncommercial educational purposes.
Parental care and brood reduction in Nicrophorus orbicollis http://www.youtube.com/watch?v=yRarHKpOf_8

Nicrophorus pustulatus exploiting a snake egg http://www.youtube.com/watch?v=Zy2vxstcWiQ

Infanticidal takeover of a carcass http://www.youtube.com/watch?v=CQ9fFslNx_E&NR=1

Other Video:

Theatrical view of burying beetles http://www.youtube.com/watch?v=enazNu0YgPs

National Geographic view of burying beetles http://www.youtube.com/watch?v=CUOPx1q5bjk

American Burying Beetle - Saint Louis Zoo http://www.youtube.com/watch?v=H75rJGLaSNk

Tracking the American Burying Beetle - Saint Louis Zoo http://www.youtube.com/watch?v=cPJRu-celQ0

Websites & Links

Sikes, D. S., S. T. Trumbo, S. B. Peck. 1999. Nicrophorus Central http://collections2.eeb.uconn.edu/nicroweb/nicrophorus.htm A website developed by Derek Sikes for all things nicrophorine

Sikes, D. S., S. T. Trumbo, S. B. Peck. 2005. Silphidae node on the Tree of Life http://tolweb.org/tree?group=Silphidae Created by Derek Sikes

Derek Sikes

BugGuide of Nicrophorus Iowa State University Entomology


Hoback, W.W., Snethen, D.G., Brust, M.L. http://www.lopers.net/student_org/NebraskaInverts/cbeetles/Genera/nicrophorus/home.htm

Carrion Beetles of Nebraska developed at the University of Nebraska at Kearney







Contact Information

Steve Trumbo and family, 2007

Office: Waterbury 307 / TLS 83
Voice: (203) 236-9878
Fax: (203) 236-9805
E-mail: trumbo@uconn.edu

Mailing address (1):
Department of EEB
99 E. Main St.
Waterbury, CT 06702

Mailing address (2):
Department of EEB
75 N. Eagleville Road, U-3043
Storrs, CT 06269

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