Artículos de revistas
Larval Competition In Weevils Revena Rubiginosa (coleoptera: Curculionidae) Preying On Seeds Of The Palm Syagrus Romanzoffiana (arecaceae)
Registro en:
Naturwissenschaften. , v. 92, n. 6, p. 265 - 268, 2005.
281042
10.1007/s00114-005-0620-6
2-s2.0-21244472684
Autor
Alves-Costa C.P.
Knogge C.
Institución
Resumen
Inter- and intraspecific local resource competition may lead to the selection of specific adaptive individual characteristics to overcome interference competition. A highly selective scenario is predictable for interference competition among seed preying weevil larvae that live in and feed upon a single host seed. This scenario is found in Syagrus romanzoffiana palm seeds which are predated by Revena rubiginosa (Curculionidae) larvae. Although multiple infestation of one seed by weevil larvae can occur, invariably only one individual survives and develops in each host seed. A strong competition between the first instar larvae in a restricted window of host fruit development stages leads to physical interactions of conspecifics by ovicide or direct fighting using falcate mandibles. The occurrence of this type of mandible is synchronized with fruit development and restricted to instars with probable competition, as infestation occurs only while the endocarp is soft. Only after lignification of the endocarp the larva changes into the next instar. Mandibles of subsequent instars differ markedly from those of the first instar. The new mandibles can scrape the solid endosperm but are unable to perforate and kill conspecifics. These findings give strong evidence for the selective pressure of intraspecific competition, where special behaviour, mandible morphology and synchronization of its changes with the seed development contribute to individual benefit that involves the killing of conspecifics, since one host seed can only maintain a single larva throughout its complete development. © Springer-Verlag 2005. 92 6 265 268 Bondar, G., Notas entomológicas de Baía XIII (1943) Rev Entomol (Rio de Janeiro), 14, pp. 337-388 Guedes, R.N., Smith, R.H., Guedes, N.M.P., Host suitability, respiration rate and the outcome of larval competition in strains of the cowpea weevil, Callosobruchus maculatus (2003) Phys Entomol, 28, pp. 298-305 Guix, J.C., Ruiz, X., Weevil larvae dispersal by guans in Southeastern Brazil (1997) Biotrpica, 29 (4), pp. 522-525 Ishihara, M., Shimada, M., Female-biased sex ratio in a wild bruchid seed-predator, Kytorhinus sharpianus. I. Larval competition and other factors (1993) Ecol Entomol, 18, pp. 54-60 Janzen, D.H., Intra- and interhabitat variations in Guazuma ulmifolia (Sterculiaceae) seed predation by Amblycerus cistelinus (Bruchidae) in Costa Rica (1975) Ecology, 56, pp. 1009-1013 Johnson, C.D., Ecology of Neltumius texanus (Coleoptera Bruchidae) in the seeds of Candalia (Rhamnaceae) (1978) J Kans Entomol Soc, 51, pp. 432-440 Kirkpatrick, R.L., Wilbur, D.A., The development and habits of the granary weevil Sitophilus granarius within the kernel of wheat (1965) J Econ Entomol, 58, pp. 979-985 May, B.M., An introduction to the immature stages of Australian Curculionoidea (1994) Australian Weevils, 2, pp. 367-755. , Zimmerman EC (ed) CSIRO Publishing, Melbourne Nénon, J.-P., Boivin, G., Le Lannic, J., Van Baaren, J., Functional morphology of the mymariform and sacciform larvae of the egg parasitoid Anaphes victus Huber (Hymenoptera: Mymaridae) (1995) Can Zool, 73, pp. 996-1000 Sanz, M.J., Gurrea, P., Life-cycles and competition-avoiding strategies of seed-eating weevil species on broom species (Coleoptera: Curculionidae/Leguminosae: Genisteae) (2000) Entomol Gen, 24, pp. 237-254 Salt, G., Competition among insect parasitoids (1961) Symp Soc Exp Biol, 15, pp. 96-119 Scherf, H., Die Entwicklungsstadien der mitteleuropäischen Curculioniden (Morphologie, Bionomie, Ökologie) (1964) Abh Senckenb Naturf Ges, 506, pp. 1-335 Stehr, F.W., (1991) Immature Insects, 2. , Kendal/Hunt, Dubuque, Iowa Thanthianga, C., Mitchell, R., Vibrations mediate prudent resource exploitation by competing larvae of the bruchid bean weevil Callosobruchus maculatus (1987) Entomol Exp Appl, 44, pp. 15-21 Van Alphen, J.J.M., Visser, M.E., Superparasitism as an adaptive strategy for insect parasitoids (1990) Annu Rev Entomol, 35, pp. 59-79 Van Baaren, J., Boivin, G., Nénon, J.P., Intraspecific hyperparasitism in a primary Hymenopteran parasitoid (1995) Behav Ecol Sociobiol, 36, pp. 237-242 Van Baaren, J., Boivin, G., Le Lannic, J., Nénon, J.P., The male and female first instar larvae of Anaphes victus and A. listronoti (Hymenoptera, Myrmaridae) (1997) Zoomorphology, 117, pp. 89-197 Van Baaren, J., Landry, B.L., Boivin, G., Sex allocation and larval competition in a superparasitizing solitary egg parasitoid: Competing strategies for an optimal sex ratio (1999) Funct Ecol, 13, pp. 66-71 Wang, R., Kok, L.T., Life history of Megacerus discoidits (Coleoptera: Bruchidae), a seedfeeder of hedge bindweed, in Southwestern Virginia (1986) Annu Entomol Soc Am, 79, pp. 359-363