The parasitic Hymenoptera in a beech forest on limestone. 2, study of the sex ratios and their dependence on ecological factors

• Autorzy: Ulrich W.
• Języki publikacji: EN

Abstrakty

EN

The sex ratio of the parastic Hymenoptera of a beech forest on limestone near Gottingen (FRG) was studied using ground-photo-eclectors. Judged from the mean sex ratios the parasitoids could be separated into 4 groups. Parasitoids of miners and gall-makers had the highest sex ratios (30 to 40% males) and less than 5% of the species were thelytokous. The species which attack soil-living sapro- or mycetophagous Diptera as well as the parasitoids of ectophytophages had (on average) 20 to 30% males and only 1.5% of them were thelytokous. Parasitoids of sap-suckers and egg-parasitoids usually had sex ratios below 20% males and 29% of them were thelytokous. The lowes sex ratios (below 10% males) and the highest number of thelytokous species (30%) were found among hyperparasitoids and parasitoids of soil-living Staphylinidae. No clear trend was detectable between the sex ratio and the density of the species. The density fluctuations and the degree of aggregation of the species influenced the sex ratio. The data are consistent with the hypothesis that K-selected parasitoid species have higher sex ratios on average. Koinobiontic species (mostly parasitoids of gall-makers and miners) had (on average) significantly higher sex ratios if their host lives in the herb or crown layer (32% versus 21%). They also produced more males if they are univoltine (32% versus 22%) and hibernate as larvae or pupae (30% versus 17%). After a MANOVA-analysis the voltinism turned out to be the main infuencing factor. There was a trend towards higher percentages of males in the summer generation.

Słowa kluczowe

EN

ground-photo-eclectors; Hymenoptera; local mate competition; parasitoids; sex ratio

• Wydawca: Museum and Institute of Zoology, Polish Academy of Sciences
• Czasopismo: Polish Journal of Ecology
• Rocznik: 1998
• Tom: Vol. 46, no 3
• Strony: 291--310
• Opis fizyczny: Bibliogr. 32 poz., tab., wykr.

Twórcy

autor

Ulrich W.

• Nicholas Copernicus University in Toruń, Department of Animal Ecology, Gagarina 9, 87-100 Toruń: Poland

Bibliografia

• [1]. Askew R.R., Ruse J.M. 1974 - Biology and taxonomy of species of the genus Enaysma DELUCCHI (Hymenoptera, Eulophidae, Entedontinae), with special reference to the British fauna - Trans. R. Ent. Soc. Lond. 125: 257-294.
• [2]. Askew R.R., Shaw M.R. 1986 - Parasitoid communities: their size, structure and development - In J.K. Waage, Greathead D.J. (Ed.): Insect Parasitoids - l3th Symp. R. Entomol. Soc. London - London (Academic Press): 225-264.
• [3]. Charnov E.L. 1982 - The Theory Of Sex Allocation - Princeton (Univ. Press).
• [4]. Delucchi V.D. 1958 - Lithocolletis messaniella Zeller (Lepidoptera, Gracillariidae). Analysis of some mortality factors with particular reference to its parasit complex - Entomophaga 3: 203-270.
• [5]. Dierschke H., Song Y. 1982 - Vegetationsgliederung und kleinraumige Horizontalstrulctur eines submontanen Kalkbuchenwaldes - In: H. Dierschke (Ed.): Struktur und Dynamik von Wäldern. Berichte der intemationalen Symposien der intemationalen Vereinigung fiir Vegetationskunde - Rinteln 1981,513-539.
• [6]. Gauthier N., Monge J.P., Huignard J. 1997 - Sex-allocation behavior of a solitary ectoparasitoid: Effects of hostpatch characteristics and female density - Entomol. Exper. Appl. 82: 167-174.
• [7]. Godfray H.C.J., Shaw M.R. 1987 - Seasonal variation in the reproductive strategy of the parasitic wasp Eulophus larvarum (Hymenoptera: Chalcidoidea: Eulophidae) - Ecol. Entomol. 12: 251-256.
• [8]. Haeselbarth E. 1979 - Zur Parasitierung der Puppen von Foreule (Panolis flammea (Schiff.)), Kiefemspanner (Bupalus piniarius (L.)) und Heidelbeerspanner (Boarmia bistortana (Goeze)) in bayerischen Kiefernwaldern - Z. Ang. Entomol. 87: 186-202; 311-322.
• [9]. Hamilton W.D. 1967 - Extraordinary sex ratios - Science 156: 477-488.
• [10]. Hilpert H. 1989 - Zur Hautflüglerfauna eines sadbadischen Eichen-Hainbuchen-mischwaldes - Spixiana 12: 57-90.
• [11]. Jackson D.J. 1958 - Obersations on the biology of Caraphractus cinctus Walker (Hymenoptera: Mymaridae), a parasitoid of the eggs of Dytiscidae - Trans. R. Entomol. Soc. Lond. 110: 533-554.
• [12]. King B.H. (1987) - Offspring sex ratios in parasitoid wasps - Quart. Rev. Biol. 62: 367-396.
• [13]. King B.H. (1996) - Sex ratio responses to other parasitoid wasps: Multiple adaptive explanations - Behavioral Ecology and Sociobiology 39: 367-374.
• [14]. Mayhew P.J., Godfray H.C.J. 1997 - Mixed sex allocation strategies in a parasitoid wasp - Oecologia 110: 218-221.
• [15]. Sandlan K. (1979) - Sex ratio regulation in Coccygomimus turionella LINNAEUS (Hymenoptera: Ichneumonidae) and its ecological implications - Ecol. Entomol. 4: 365-378.
• [16]. Ode P.J., Antolin M.F., Strand M.R. 1997 - Constrained oviposition and female-biased sex allocation in a parasitic wasp - Oecologia 109: 547-555.
• [17]. Schaefer M. 1990 - The soil fauna of a beech forest on limestone: trophic structure and energy budget - Oecologia 82: 128-136.
• [18]. Schaefer M., SchauerMann J. 1990 -The soil fauna of beech forests: comparison between a muli and a moder soil - Pedobiologia 34: 299-314.
• [19]. Strand M.R. 1988 - Variable sex ratio strategy of Telenomus heliothidis (Hymenoptera, Scelionidae) - adaptation to host and conspecific density - Oecologia 77: 219-224.
• [20]. Strohm E., Linsenmair K.E. 1997 - Low resource availability causes extremely male-biased investment ratios in the European beewolf, Philanthus triangulum F. (Hymenoptera, Sphecidae) - Proceedings of the Royal Society of London Series B Biological Sciences 264(1380): 423-429.
• [21]. Thiede U. 1975 - Untersuchungen über die Arthropodenfauna in Fichtenforsten (Populationstikologie, Energieumsatz) - Thesis Göttingen.
• [22]. Townes H., Townes M. 1981 - A Revision Of The Serphidae - Mem. Am. Entomol. Inst. 32. Ann Arbor.
• [23]. Trjapizyn W.A. 1978 - Proctotrupoidea. In Trjapizyn W.A., Alekseev W.N., Dzhanokmen K.A., Zerova M.D., Koslow M.A., Kostjukow W.W., Nikol'skaja M.N., Ponomarenko N.G., Sorokina A.P., Sugonjaev E.S., Jasnosh W.A. 1978: Bethyloidea, Chalcidoidea, Proctotrupoidea, Ceraphronoidea - Opred. Fauna SSSR 120. Leningrad: 516-538.
• [24]. Ulrich W. 1987 - Wirtsbeziehungen der parasitoiden Hautflügler in einem Kalkbuchenwald - Zool. Jahrb. Syst. 114: 303-342.
• [25]. Ulrich W. 1988 - Welche Faktoren beein-flussen die Populationen und die Strukturen der Gemeinschaften von bodenlebenden parasitoiden Hymenopteren in einem Buchenwlad - Thesis Göttingen.
• [26]. Ulrich W. 1998a - The parasitic Hymenoptera in a beech forest on limestone I: Species composition, species turnover, abundance and biomass - Pol. J. Ecol. 46: 261-289.
• [27]. Ulrich W. 1998b - Species composition, coexistence and mortality factors in a carrion exploiting community composed of necrophagous Diptera and their parasitoids - Pol. J. Ecol. in press.
• [28]. Ulrich W. 1998c - The Hymenoptera of a dty meadow on limestone I: Species composition, abundance and biomass - Pol. J. Ecol. in press.
• [29]. Van Alphen J.J.M., Thunnissen I. 1983 - Host selection and sex allocation by Pachycrepoideus vindemiae RON-DANI (Pteromalidae) as a facultative hyperparasitoid of Asobara tabida NEES (Braconidae: Alysiinae) and Leptopilina heterotoma (Cynipoidea: Eucoilidae) - Neth. J. Zool. 33: 497-514.
• [30]. Waage J.K. 1986 - Family planning in parasitoids: adaptive patterns of progeny and sex allocation - In: Waage J.K, Greathead D.J. (Ed.): Insect Parasitoids - 13th Symp. R. Entomol. Soc. London. London (Academic Press): 63-95.
• [31]. Waage J.K., N G S.M. 1984 - The reproductive strategy of a parasitic wasp. I. Optimal progeny and sex allocation in Trichogramma evanescens - J. Animal Ecol. 53: 401-416.
• [32]. Weidemann G. (1965) - Okologische und biometrische Untersuchungen an Proctotrupiden (Hymenoptera: Proctotrupidae s. str.) der Nordseektiste und des Binnenlandes - Z. Morph. skol. Tiere 55: 425-514.