Abstract
We examined behavioral mechanisms underlying aggregation and mate location in the red milkweed beetle, Tetraopes tetrophthalmus (Forster) (Coleoptera: Cerambycidae). Larvae of this species feed on rhizomes of common milkweed, Asclepias syriaca L., and adults feed on the flowers and foliage, aggregating on individual stems within milkweed patches. Adults preferred to aggregate on milkweeds that had multiple, large inflorescences. Males actively searched for females, often flying between host plants. Mate location did not appear to involve long-range pheromones or vision, but rather males landed on milkweed stems arbitrarily, whether or not females were present. Males remained for longer periods, and so tended to accumulate, on milkweed stems that had female-biased sex ratios. We conclude that aggregation of T. tetrophthalmus is cued by host plant characteristics but dynamically influenced by the sex ratio of conspecifics present on individual stems.
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REFERENCES
Chemsak, J. A. (1963). Taxonomy and bionomics of the genus Tetraopes. Univ. Calif. Publ. Entomol. 30: 1–90.
Eanes, W. F., Gaffney, P. M., Koehn, R. K., and Simon, C. M. (1977).Astudy of sexual selection in natural populations of the milkweed beetle, Tetraopes tetraophthalmus. In Christiansen, F.B., and Fenchel, T.M.(eds.), Measuring Selection in NaturalPopulations, Springer-Verlag, New York, pp. 49–64.
Gardiner, L.M. (1961).Anote on oviposition and larval habits of the milkweed beetle,Tetraopes tetrophthalmus Forst. (Coleoptera: Cerambycidae). Can. Entomol. 93: 678–679.
Ginzel, M. D., and Hanks, L. M. (2002a). Evaluation of synthetic hydrocarbons for markrecapture studies on the red milkweed beetle. J. Chem. Ecol. 28: 1041–1047. Aggregation and Mate Location in the Red Milkweed Beetle 829
Ginzel, M. D., and Hanks, L.M. (2002b). The role of contact pheromones in mate location and recognition in Xylotrechus colonus. J. Chem. Ecol. (in press).
Gleason, H. A., and Cronquist, A. (1963). Manual of Vascular Plants of Northeastern United States and Adjacent Canada, Willard Grant Press, Boston.
Godfray, H. C. J., and Cook, J. M. (1997). Mating systems of parasitoid wasps. InChoe, J. C., and Crespi, B. J. (eds.), The Evolution of Mating Systems in Insects and Arachnids, Cambridge University Press, Cambridge pp. 211–225.
Hanks, L.M. (1999). Influence of the larval host plant on reproductive strategies of cerambycid beetles. Annu. Rev. Entomol. 44: 483–505.
Hanks, L. M., Millar, J. G., and Paine, T. D. (1998). Dispersal of the eucalyptus longhorned borer (Coleoptera: Cerambycidae) in urban landscapes. Environ. Entomol. 27: 1418–1424.
Harman, D. M., and Harman, A. L. (1987) Distribution pattern of adult locust borers, (Coleoptera: Cerambycidae) on nearby goldenrod, Solidago spp. (Asteraceae), at a forest-field edge. Proc. Entomol. Soc. Am. 89: 706–710.
Hartman, F. (1977). The Ecology and Coevolution of Common Milkweed (Asclepias syriaca) and Milkweed Beetles (Tetraopes tetraophthalmus: Cerambycidae), Ph.D. dissertation, University of Michigan, Ann Arbor.
Isman, M. B., Duffey, S. S., and Scudder, G. G. F. (1977). Cardenolide content of some leafand stem-feeding insects on temperate North American milkweeds (Asclepias spp.). Can. J. Zool. 55: 1024–1028.
Jones, F. M. (1932). Insect coloration and the relative acceptability of insects to birds. Trans. Entomol. Soc. London 80: 345–385.
Lawrence, W. S. (1982). Sexual dimorphism in between and within patch movement of a monophagous insect: Tetraopes (Coleoptera: Cerambycidae). Oecologia 51: 245–250.
Lawrence, W. S. (1986). Male choice and competition in Tetraopes tetraophthalmus: Effects of local sex ratio variation. Behav. Ecol. Sociobiol. 18: 289–296.
Lawrence, W. S. (1988). Movement ecology of the red milkweed beetle in relation to population size and structure.J. Anim. Ecol. 57: 21–35.
Matter, S. F., Landry, J. B., Greco, A. M., and Lacourse, C. D. (1999). Importance of floral phenology and florivory for Tetraopes tetraophthalmus (Coleoptera: Cerambycidae): Tests at the population and individual level. Environ. Entomol. 28: 1044–1051.
McCauley, D. E. (1982). The behavioral components of sexual selection in the milkweed beetle Tetraopes tetraophthalmus. Anim. Behav. 30: 23–28.
McCauley, D.E. (1983). Gene flow distance in natural populations of Tetraopes tetraophthalmus. Evolutio 37: 1239–1246.
McCauley, D. E. (1991). The effect of host plant patch size variation on the population structure of a specialist herbivore insect, Tetraopes tetraophthalmus. Evolution 45: 1675–1684.
McCauley, D. E., and Eanes, F. E. (1987). Hierachical population structure analysis of the milkweed beetle, Tetraopes tetraophthalmus (Forster). Heredity 58: 193–201.
McCauley, D. E., and Lawson, E.C. (1986). Mating reduces predation on male milkweed beetles. Am. Nat. 127: 112–117.
McCauley, D. E., and Reilly, L.M. (1984). Sperm storage and sperm precedence in the milkweed beetle Tetraopes tetraophthalmus (Forster) (Coleoptera: Cerambycidae). Ann. Entomol. Soc. Am. 77: 526–530.
McCauley, D. E., Ott, J. R., Stine, A., and McGrath, S. (1981). Limited dispersal and its effect on population structure in the milkweed beetle Tetraopes tetraophthalmus. Oecologia 51: 145–150.
McLain, D. K., and Boromisa, R.D. (1987). Male choice, fighting ability, assortative mating, and the intensity of sexual selection in the milkweed longhorn beetle Tetraopes tetraophthalmus (Coleoptera: Cerambycidae). Behav. Ecol. Sociobiol. 20: 239–246.
Price, P.W. (1997). Insect Ecology, 3rd ed.,Wiley & Sons, New York.
Price, P. W., and Willson, M. F. (1976). Some consequences for a parasitic herbivore, the milkweed longhorn beetle Tetraopes tetrophthalmus, of a host-plant shift from Asclepias syriaca to A. verticillata. Oecologia 25: 331–340.
SAS Institute (2001). SAS/STAT User's Guide for Personal Computers, release 8.01, SAS Institute, Cary, NC.
Sokal, R. R., and Rohlf, F. J. (1995). Biometry, 3rd ed.,W. H. Freeman, New York.
Southwood, T. R. E., and Henderson, P. A. (2000). Ecological Methods 3rd ed., Blackwell Science, Oxford.
Thornhill, R., and Alcock, J. (1983). The Evolution of Insect Mating Systems, Harvard University Press, Cambridge, MA.
Wells, H., Strauss, E. G., Rutter, M. A., and Wells, P. H. (1998). Mate location, population growth and species extinction. Biol. Conserv. 86: 317–324.
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Reagel, P.F., Ginzel, M.D. & Hanks, L.M. Aggregation and Mate Location in the Red Milkweed Beetle (Coleoptera: Cerambycidae). Journal of Insect Behavior 15, 811–830 (2002). https://doi.org/10.1023/A:1021127624215
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DOI: https://doi.org/10.1023/A:1021127624215