, Volume 68, Issue 1, pp 1–6 | Cite as

The reproductive strategy of the gregarious parasitoid, Pteromalus puparum (Hymenoptera: Pteromalidae)

1. Optimal number of eggs in a single host
  • Masami Takagi
Original Papers


Pteromalus puparum is a gregarious parasitoid of many butterfly pupae. Adult size, mortality, and sex ratio of P. puparum, as a parasitoid of Papilio xuthus, were unit weight of the host. Effects of female size on fecundity, wing load, and longevity were also examined.

The highest total weight of progeny from the host was attained when the number of eggs per gram of the host was approximately 150. Positive correlations were observed between the size of the females and their fecundity and wing load. The maximum longevity of the female kept with honey but without hosts was attained when the initial number of parasitoids per g of the host was 150.

Considering the total fecundity of all female progeny, the reproductively most efficient number of eggs to be deposited per g of the host was estimated to be approximately 300. However, as shortage of food for the adult females strongly affects their fecundity, the reproductively most efficient number of eggs to be deposited per g of the host was about 70 when the adult female progeny was not provided with food.

The optimal number of eggs to be deposited when the emale oviposits in the host under field conditions is discussed.


Field Condition Adult Female Total Weight Optimal Number Unit Weight 
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  1. Bouletreau M (1971) Croissance larvaire et utilisation de l'hôte chez Pteromalus puparum (Hym., Chalc.): influence de la densité de population. Ann Zool Ecol Anim 3:305–318Google Scholar
  2. Bouletreau M (1974) Influence de la densité de population larvaire sur quelques caractères biométriques des adultes. Étude chez un hyménoptère parasite: Pteromalus puparum. Ann Zool Ecol Anim 6:200–204Google Scholar
  3. Charnov EL (1976) Optimal foraging, the marginal value theorem. Theor Popul Biol 9:129–136PubMedGoogle Scholar
  4. Charnov EL (1982) The theory of sex allocation. Princeton University Press, Princeton, New Jersey, 355 ppGoogle Scholar
  5. Comins HN, Hassell MP (1979) The dynamics of optimally foraging predators and parasitoids. J Anim Ecol 48:335–351Google Scholar
  6. Cook RM, Hubbard SF (1977) Adaptive searching strategies in insect parasites. J Anim Ecol 46:115–125Google Scholar
  7. Doten SB (1911) Cohcerning the relation of food to reproductive activity and longevity in certain hymenopterous parasites. Tech Bull Nevada Agric Exp Stn: 78:7–30Google Scholar
  8. Emlen JM (1966) The role of time and energy in food preference. Am Nat 100:611–617Google Scholar
  9. Hamilton WD (1967) Extraordinary sex ratios. Science: 156:477–488PubMedGoogle Scholar
  10. Hirose Y, Suzuki Y, Takagi M, Hiehata K, Yamasaki M, Kimoto H, Iga M, Yamaguchi K (1980) Population dynamics of the citrus swallowtail, Papilio xuthus Linné (Lepidoptera: Papilionidae): mechanisms stabilizing its numbers. Res Popul Ecol 21:260–285Google Scholar
  11. Hubbard SF, Cook RM (1978) Optimal foraging by parasitoid wasps. J Anim Ecol 47:593–604Google Scholar
  12. Klomp H, Teerink BJ (1967) The significance of oviposition rates in the egg parasite, Trichogramma embryophagum Htg. Arch Néerl Zool 18:350–375Google Scholar
  13. Krebs JR (1973) Behavioral aspects of predation. In: Bateson PPG, Klopfer PH (eds). Perspectives in Ethology, Vol. 1, Plenum Press New York and London, pp 73–111Google Scholar
  14. MacArthur RH, Pianka ER (1966) On optimal use of a patchy environment. Am Nat 100:603–609CrossRefGoogle Scholar
  15. Murakami Y (1975) An experimental study of intraspecific competition in two parasitoids of Comstock mealybug. J Facul Agric Kyushu Univ 20:15–25Google Scholar
  16. Oaten A (1977) Optimal foraging in patches: a case for stochasticity. Theor Popul Biol 12:263–285PubMedGoogle Scholar
  17. Peck O (1963) A catalogue of the Nearctic Chalcidoidea (Insecta: Hymenoptera). Can Ent, suppl 30:1–1092Google Scholar
  18. Pyörnila M (1977) Parasitism in Aglais urticae (L.) (Lep., Nymphalidae). IV. Pupal parasitoids. Ann Ent Fenn 43:21–27Google Scholar
  19. Salt G (1961) Competition among insect parasitoids. Symp Soc Exp Biol 15:96–119Google Scholar
  20. Schoener TW (1971) Theory of feeding strategies. Ann Rev Ecol Syst 2:369–404CrossRefGoogle Scholar
  21. Shiga M, Nakanishi A (1968) Intraspecific competition in a field population of Gregopimpla himalayensis (Hymenoptera: Ichneumonidae) parasitic on Malacosoma neustria testacea (Lepidoptera: Lasiocampidae). Res Popul Ecol 10:69–86Google Scholar
  22. Takagi M (1976) Ecology of Pteromalus puparum (Linné) (Hymenoptera: Pteromalidae) parasitic on the pupa of Papilio xuthus Linné (Lepidoptera: Papilionidae). Japanese J Appl Ent Zool 20:157–163Google Scholar
  23. Takagi M (1981) Ecology of Pteromalus puparum (Linné) (Hymenoptera: Pteromalidae), with particular reference to its effectiveness as a natural enemy of Papilio xuthus Linné (Lepidoptera: Papilionidae). PhD thesis, Kyushu University, pp 206 (in Japanese)Google Scholar
  24. Waage JK (1979) Foraging for patchily-distributed hosts by the parasitoid, Nemeritis canescens. J Anim Ecol 48:353–371Google Scholar
  25. Waage JK, Ming NS (1984) The reproductive strategy of a parasitic wasp I. Optimal progeny and sex allocation in Trichogramma evanescens. J Anim Ecol 53:401–415Google Scholar
  26. Waage JK, Lane JA (1984) The reproductive strategy of a parasitic wasp II. Sex allocation and local mate competition in Trichogramma evanescens. J Anim Ecol 53:417–426Google Scholar
  27. Wylie HG (1976) Interference among females of Nasonia vitripennis (Hymenoptera: Pteromalidae) and its effect on sex ratio of their progeny. Can Ent 108:655–661Google Scholar

Copyright information

© Springer-Verlag 1985

Authors and Affiliations

  • Masami Takagi
    • 1
  1. 1.Division of Insect Natural Enemies, Institute of Biological Control, Faculty of AgricultureKyshu UniversityFukuokaJapan

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