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Masaki, Shinzo
概要:
The ground cricket, tentatively identified as Pteronemobius tapro-banensis WALKER, regulates its egg diapause, growth ra
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te, and wing form in response to photoperiod. These responses seem to be physiologically independent of one another, for each of them shows not only a photoperiodic curve, but also a geographic pattern, of its own. Geographic variations in diapause and development indicate at least three different life cycles. (i) A univoltine cycle with eggoverwintering would be prevalent to the north of about 35°N, because the egg enters diapause even in long days (>14 hr), and the nymph controls its growth by a response of short-day type. (ii) A multivoltine cycle with egg-overwintering would be common between 28 and 35°N, because the egg averts diapause in long days, and the long-day retardation of nymphal growth is somewhat reduced. (iii) A multivoltine cycle with nymphal overwintering would occur to the south of about 28°N, because the egg diapause is virtually absent and the nymphal growth is retarded in short days (<14 hr). The last type probably represents a distinct species.
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豊嶋, 秋彦
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豊嶋, 秋彦 ; 清, 俊夫 ; 芳野, 晴男
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横山, 弘
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増川, 栄一
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蛯名, 俊一
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山内, 均
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竹内, 進
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落合, 哲夫
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| 10.
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佐々木, 栄子
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