Levels of Parasitism by Xenos moutoni du Buysson (Strepsiptera, Stylopidae) and their Seasonal Changes in Hornets (Hymenoptera : Vespidae, Vespa) Caught with Bait Traps

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概要

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• Parasitism by Xenos moutoni was studied in four Vespa species collected with bait (fruit juice and liquor) traps in forests in Miyazaki Prefecture, southern Japan. Stylopized hornets were seen between May and mid October. The overall rate of stylopized female hornets (queens or workers) was largest in V. analis insularis (11.2%), followed by V. mandarinia japonica (4.3), V. ducalis pulchra (4.2), and V. simillima xanthoptera (1.7). Male hornets were also stylopized in V. analis (6.4%) and V. ducalis (1.7). The number of parasites per host varied from one to five, though 60% of hosts were singly parasitized. Male parasites did not occur before late July, but they outnumbered females in September and early October. Female parasites were almost always found between the 5th and 6th gastral tergites of hosts, and most males between the 4th and 5th or the 3rd and 4th. Cephalothorax widths of female parasites were positively correlated with head widths of female hosts in V. analis, V. mandarinia and V. ducalis. Multiple parasitism on single females decreased the average size of female parasites in V. analis. The percentage of stylopized individuals among overwintered queens was estimated at 15% in V. analis and 4% in V. mandarinia and V. ducalis. Stylopized workers that had overwintered were found : they accounted for 24 to 44% of overwintered stylopized females. Workers were most frequently stylopized in August in V. mandarinia and in September in V. analis and V. ducalis.

• 日本昆虫学会の論文
• 1998-12-25

著者

• Makino S

  Forest Entomology Laboratory Kyushu Research Center Forestry And Forest Products Research Institute:

• Makino Shunichi

  Forest Entomology Laboratory Kyushu Research Center Forestry And Forest Products Research Institute

• YAMASHITA Yoshiharu

  Forest Technical Center

関連論文

• Invasion pathway and potential risks of a bamboo-nesting carpenter bee, Xylocopa tranquebarorum (Hymenoptera: Apidae), and its micro-associated mite introduced into Japan
• Nest Contents and Colonial Adult Productivity in a Common Hornet, Vespa simillima simillima SMITH, in Northern Japan (Hymenoptera, Vespidae)
• Levels of Parasitism by Xenos moutoni du Buysson (Strepsiptera, Stylopidae) and their Seasonal Changes in Hornets (Hymenoptera : Vespidae, Vespa) Caught with Bait Traps
• Defensive Behavior of the Gall Aphid Epipemphigus niisimae (Homoptera), with Notes on the Secondary Host

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