Summary
Obligately monogynous and facultatively polygynous forms ofCamponotus nawai Ito was compared.
The seasonal changes of colony composition were similar in the two forms except for the season in which alates were found in nests. Collection data suggested that new colonies are founded only by single foundresses in the monogynous form, but mainly by colony budding in the polygynous form.
All or most queens in polygynous nests were fertile, thus polygyny is functional. The body size and ovarian volume of queens were larger in the monogynous forms. Queens of the polygynous form showed bimodal size distribution, though smaller queens were less frequent. In the polygynous form, the number of queens was positively correlated with the number of immatures, but negatively correlated with the number of immatures per queen.
It seems that the polygynous form occupies more northern regions than the monogynous one and their ranges contact parapatrically.
The monogynous and polygynous forms ofC. nawai may be different species because of the differing mating seasons.
Zusammenfassung
Eine obligatorisch monogyne und eine fakultativ polygyne Form vonCamponotus nawai Ito wurden vergleichen. Jahreszeitliche Veränderungen der Koloniezusammensetzung waren bei beiden Formen ähnlich, abgesehen von der Zeit, in der geflügelte Geschlechtstiere in den Nestern zu finden sind. Die Sammelergebnisse lassen annehmen, daß bei der monogynen Form neue Kolonien nur von einzelnen Königinnen gegründet werden, während sie bei der polygynen Form durch Kolonieteilung entstehen.
In polygynen Völkern waren alle oder fast alle Königinnen fertil, sa daß eine funktionelle Polygynie vorliegt. Königinnen der monogynen Form sind größer und haben größere Ovarien. Die Königinnen der polygynen Form zeigen eine bimodale Grossen-verteilung doch sind die kleineren Königinnen seltener. Bei der polygynen Form war die Anzahl der Königinnen mit der Menge der Brutstadien positiv korreliert, aber negativ mit der Menge der Brustadien pro Königin.
Anscheinend besiedelt die polygyne Form mehr nördliche Gebiete als die monogyne, ihre Areale überschneiden sich kaum.
Aufgrund der jahreszeitlich verschiedenen Schwarmzeiten sind die monogyne und die polygyne Form vonC. nawai möglicherweise zwei verschiedene Arten.
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References
Brian M. V., 1983. — Social insects: ecology and behavioural biology.Chapman and Hall Ltd., publi., London, 377 p.
Fletcher D. J. C., Blum M. S., Whitt T. V., Temple N., 1980. — Monogyny and polygyny in the fire ant,Solenopsis invicta.Ann. Entomol. Soc. Am., 73, 658–661.
Greenberg L., Fletcher D. J. C., Vinson S. B., 1985. — Differences in worker size and mound distribution in monogynous and polygynous colonies of the fire antSolenopsis invicta Buren.J. Kansas Entomol. Soc., 58, 9–18.
Herbers J. M., 1986. — Nest site limitation and facultative polygyny in the antLeptothorax longispinosus.Behav. Ecol. Sociobiol., 19, 115–122.
Hölldobler B., Wilson E. O., 1977. — The number of queens: an important trait in ant evolution.Naturwissenschaften, 64, 8–15.
Janzen D. H., 1973. — Evolution of polygynous obligate acacia-ants in western Mexico.J. Anim. Ecol., 42, 727–750.
König W. D., Pitelka F. A., 1981. — Ecological factors and kin selection in the evolution of cooperative breeding in birds. In Natural selection and social behavior, Eds. R. D. Alexander and D. W. Tinkle,Chiron Press, New York.
Michener C. D., 1964. — Reproductive efficiency in relation to colony size in hymenopterous societies.Insectes Soc., 11, 317–342.
Pamilo P., Rosengren R., 1984. — Evolution of nesting strategies of ants: genetic evidence from different population types ofFormica ants.Biol. J. Linn. Soc., 21, 331–348.
Roisin Y., Pasteels J. M., 1985. — Imaginal polymorphism and polygyny in the Neo-Guinean termiteNasutitermes princeps (Desneux).Insectes Soc., 32, 140–157.
Ross K. G., Fletcher D. J. C., 1985.— Comparative study of genetic and social structure in two forms of the fire antSolenopsis invicta (Hymenoptera: Formicidae).Behav. Ecol. Sociobiol., 17, 349–356.
Wilson E. O., 1974. — The population consequences of polygyny in the antLeptothorax curvispinosus.Ann. Entomol. Soc. Am., 67, 781–786.
Yamaoka H., 1977. — Colony composition ofCamponotus nawai.Anima, 52, 80–81.Heibonshya, Tokyo. (In Japanese.)
Yamaoka H., 1978. — Arboreal ants of Chiba pref.- ant fauna and colony composition, second report.Chiba-Seibutsusi, 27, 114–118. (In Japanese.)
Yamauchi K., Kinomura K., Miyake S., 1981. — Sociobiological studies of the polygynic antLasius sakagamii. I: General features of its polydomous system.Insectes Soc., 28, 279–296.
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Satoh, T. Comparisons between two apparently distinct forms ofCamponotus nawai ITO (Hymenoptera: Formicidae). Ins. Soc 36, 277–292 (1989). https://doi.org/10.1007/BF02224881
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DOI: https://doi.org/10.1007/BF02224881