Strongly biased sex ratio in cuckoo wasp Chrysura hirsuta (Hymenoptera: Chrysididae), a parasitoid of the mason bee Osmia orientalis

Strongly biased sex ratio in cuckoo wasp Chrysura hirsuta (Hymenoptera: Chrysididae), a parasitoid of the mason bee Osmia orientalis

We examined the rate of parasitism and sex ratio of the cuckoo wasp Chrysura hirsuta (Gerstaecker) (Hymenoptera: Chrysididae) that emerged from nests of the mason bee Osmia orientalis Benoist (Hymenoptera: Megachilidae) in Nara, Japan. Nests of O. orientalis were found in empty shells of two snail s...

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Bibliographic Details
Published in:Entomological science Vol. 15; no. 2; pp. 250 - 252
Main Authors: YOKOI, Tomoyuki, HIROOKA, Takuto, TERADA, Takeshi, SUGIMOTO, Shusaku, TAMARU, Mayumi, SATOH, Sachiko, KANDORI, Ikuo
Format: Journal Article
Language:English
Published: Melbourne, Australia Blackwell Publishing Asia 01-04-2012
Blackwell Publishing Ltd
Subjects:
Bees
Chrysididae
cocoons
Entomology
Euhadra
Hymenoptera
Insects
Megachilidae
nest
Nests
Osmia
Parasites
Parasitism
Parasitoids
Parthenogenesis
Sex ratio
Shells
snail shell
snails
thelytokous parthenogenesis
Japan
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Summary:We examined the rate of parasitism and sex ratio of the cuckoo wasp Chrysura hirsuta (Gerstaecker) (Hymenoptera: Chrysididae) that emerged from nests of the mason bee Osmia orientalis Benoist (Hymenoptera: Megachilidae) in Nara, Japan. Nests of O. orientalis were found in empty shells of two snail species, Satsuma japonica (Pfeiffer) and Euhadra amaliae (Kobelt). The percentage of parasitism by cuckoo wasps per all collected cocoons tended to be high (20–50%) even though interannual variation and the average number of cocoons per nest did not differ across snail shell species within each year. Our results from three years of observation, combined with previous reports, showed that the adult sex ratio of C. hirsuta was strongly female‐biased, which suggests that the species reproduces by thelytokous parthenogenesis.
Bibliography:http://dx.doi.org/10.1111/j.1479-8298.2011.00500.x
ArticleID:ENS500
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ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1343-8786
1479-8298
DOI:10.1111/j.1479-8298.2011.00500.x