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The Distribution of Pholidoptera griseoaptera (Degeer) (Orthoptera: Tettigoniidae) in England and Wales Related to Accumulated Temperatures

J. C. Hartley and A. C. Warne
Journal of Animal Ecology
Vol. 42, No. 3 (Oct., 1973), pp. 531-537
DOI: 10.2307/3122
Stable URL: http://www.jstor.org/stable/3122
Page Count: 7
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The Distribution of Pholidoptera griseoaptera (Degeer) (Orthoptera: Tettigoniidae) in England and Wales Related to Accumulated Temperatures
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Abstract

(1) In Pholidoptera griseoaptera the egg stage lasts from late summer of year 1, through year 2, and hatching occurs in the spring of year 3. Diapause occurs in the whole embryo, normally towards the end of year 2. (2) Most of the embryonic development occurs during the summer of year 2 and is dependent on a heat input of at least 800 day-degrees C above 11 degrees C. (3) There is a reasonable correlation between distribution and accumulated temperature.

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