Variation in wing dimorphism of oriental mole cricket Gryllotalpa orientalis: Comparative study in Okinawa and Hyogo populations

The oriental mole cricket Gryllotalpa orientalis exhibits variation in wing dimorphism. In an Okinawa population, no short-winged individuals were observed, and wing dimorphism has not been detected. Flight behavior of G. orientalis was observed from April to October in Okinawa. In contrast, a Hyogo...

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Bibliographic Details
Published in:Entomological science 2011-01, Vol.14 (1), p.103-105
Main Authors: ENDO, Chihiro, IKEDA, Yusuke, SATOH, Aya
Format: Article
Language:English
Subjects:
Anatomy & physiology
Animal populations
Comparative studies
Dimorphism
Entomology
Flight
Flight activity
flight period
geographic variation
Gryllidae
Gryllotalpa
Insects
Life cycle
seasonal wing dimorphism
Temperature effects
Wings
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Summary:The oriental mole cricket Gryllotalpa orientalis exhibits variation in wing dimorphism. In an Okinawa population, no short-winged individuals were observed, and wing dimorphism has not been detected. Flight behavior of G. orientalis was observed from April to October in Okinawa. In contrast, a Hyogo population exhibited seasonal wing dimorphism and long-winged individuals appear from June to September. The flight period of the long-winged morph coincided with this period. Short-winged individuals appeared from September to the following June and they never fly. Both populations showed univoltine life cycles. Considering the possible flight period, wing pattern and life cycle of mole crickets in these two areas, it is presumed that flightlessness is expected to arise when adults can not experience suitable temperatures for flight activity.
ISSN:1343-8786
1479-8298
DOI:10.1111/j.1479-8298.2010.00419.x