Abstract
Many insular vertebrates have unusually high population densities and are characterized by behavioural shifts including reduced territory size and reduced situation-specific aggressiveness. Compared to their mainland counterparts, Blue Tits on the island of Corsica exhibit many traits that fit the trends observed in crowded insular populations. We demonstrate from behavioural observations in aviaries and from hormone measurements that Corsican its are less aggressive than mainland ones. These shifts, as well as changes in reproductive patterns, support the defense hypothesis.
Similar content being viewed by others
References
Stamps, J. A., and Buechner, M., Q. Rev. Biol.60 (1985) 155.
Abbott, L., Advances in Ecological Research2 (1980) 329.
Williamson, M., Island Populations. Oxford Univ. Press 1981.
Blondel, J., J. Anim. Ecol.54 (1985) 531.
Blondel, J., Perret, P., and Maistre, M., J. Evol. Biol.3 (1990) 469.
Blondel, J., Dervieux, A., Maistre, M., and Perret, P. Oecologica88 (1991) 9.
Blondel, J., Pradel, R., and Lebreton, J. D., J. Anim. Ecol.61 (1992) 205.
Perrins, C. M., J. Anim. Ecol.34 (1965) 601.
Trivers, R. L., Am. Zool.14 (1974) 249.
Zandt, H., Strijkstra, A., Blondel, J., and van Balen H., Population Biology of Passerine Birds. Springer-Verlag, Berlin, Heidelberg 1990.
Floret, C., Galan, M. J., Le Floc'h, E., Leprince, F., and Romane, F., Plant Phenomorphological Studies in Mediterranean Type Ecosystems. Kluwer Academic Publ., Dordrecht 1989.
Bercovitz, A. B., Czekala, N. M., and Lasley, B. L., Proc. Soc. Stud. Reprod., 10th Ann. Meet., Austin, Texas 1977.
Colomb, B., PhD thesis, Montpellier 1984.
Van Noordwijk, A., van Balen, H., and Scharloo, W., Oecologia49 (1981) 158.
Lofts, B., and Murton, R. K., Avian Biology, vol. III. Academic Press, New York 1973.
Hinde, R. A., Avian Biology, vol. III. Academic Press, New York 1973.
Wingfield, J. C., Acta XIX Congr. Int. Orn., Ottawa 1986.
Rost, R., J. Orn.131 (1990) 403.
Brown, J. L., The Evolution of Behavior. W. W. Norton & Company, New York 1975.
Ydenberg, R. C., Giraldeau, L. A., and Falls, J. B., Anim. Behav.36 (1988) 343.
Blondel, J., Chessel, D., and Frochot, B., Ecology69 (1988) 1899.
Schoener, T. W., Am. Nat.121 (1983) 608.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Perret, P., Blondel, J. Experimental evidence of the territorial defense, hypothesis in insular Blue Tits. Experientia 49, 94–98 (1993). https://doi.org/10.1007/BF01928800
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF01928800