Identification of the Sex of Eggs and the Mating Status of Female Adults in Echthrodelphax fairchildii (Hymenoptera : Dryinidae) Based on Oviposition Behavior

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概要

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• Oviposition behavior of Echthrodelphax fairchildii females was observed. Mated females ceased moving their stings for 2-3.5s before inserting an egg when laying female eggs and for less than 1.5s when laying male eggs. Unmated females, when laying eggs, ceased moving their stings according to a bimodal distribution with maximums of about 1s and about 20s. These findings enabled identification of the sex of eggs and the mating status of females based on oviposition behavior. When ovipositing into 4th-instar hosts, each female, whether mated or unmated, showed pauses of sting movement of 1.8s or less with frequencies of around 86%. When ovipositing into 5th-instar hosts, each female showed short pause times with frequencies of about 6%. These findings present circumstantial evidence that E. fairchildii females have no memory of their mating status. Unmated females attempting to lay a female egg may be transferring sperm from the spermatheca to an egg in vain, resulting in a long pause time.

• 日本昆虫学会の論文
• 2000-12-25

著者

• Imai Nobuhiro

  Insect Ecology Laboratory Faculty Of Bioresources Mie University

• YAMADA Yoshihiro

  Insect Ecology Laboratory, Faculty of Bioresources, Mie University

• Yamada Y

  Mie Univ. Mie Jpn

• Yamada Yoshihiro

  Insect Ecology Laboratory Faculty Of Bioresources Mie University

関連論文

• Identification of the Sex of Eggs and the Mating Status of Female Adults in Echthrodelphax fairchildii (Hymenoptera : Dryinidae) Based on Oviposition Behavior
• Payoff from Self and Conspecific Superparasitism in a Parasitoid, Haplogonatopus atratus (Hymenoptera: Dryinidae) : the Case of Third Instar Hosts(Behavior and Ecology)

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