Interactions between photoperiodism and temperature with respect to the control of dormancy in the adult stage of Pterostichus oblongopunctatus F. (Col., Carabidae) : I. Experiments on gonad maturation under different climatic conditions in the laboratory.

Pterostichus oblongopunctatus belongs to the type of spring breeding carabids with adult hibernation. Ovarian maturation is under the control of photoperiod: the females need a change of day length to mature. The first step of egg maturation (previtellogenesis) is bound to short day, the second step (vitellogenesis) to long day.

[Not Available].

The control of annual rhythmicity in Agonum assimile was investigated by dissections and by breeding experiments both with specimens captured in the field and these reared in the laboratory. A. assimile is a spring breeder with summer larvae.

The control of larval hibernation and of adult aestivation in the Carabid beetlesNebria brevicollis F. andPatrobus atrorufus stroem.

1. Nebria brevicollis andPatrobus atrorufus have hibernating larvae and adults that breed in autumn. The young adults hatch in spring and early summer and undergo an aestivation diapause before maturation and reproduction.

[Not Available].

Carabid beetles of forest habitats are mostly hygrophilous and darkpreferring species. Nearly all of them are nocturnal, and the majority are autumn breeders. Most carabids from open field habitats are xerophilous, light-preferring and diurnal species, or they are indifferent to humidity and light and can be active by day and night.

[Experiments on adult emergence rhythms in Carabid bettles].

The emergence times of the following species of Carabid beetles were investigated in a long day of LD 18/6: Agonum assimile Payk., Pterostichus angustatus Dft., P.