J P Lachaud

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We describe a technique based on automatic photography as an alternative to the visual scanning method for behavioural investigations of insect societies. This technique opens up the possibilities for studying poorly-populated colonies over prolonged periods. The reliability of this technique as compared to the direct observational method was demonstrated(More)
Within the theoretical framework of adaptive significance, it is often claimed that insects learn just what they are genetically programmed to learn. Consequently, because of the alleged lack of plasticity of their behaviour, many learning tests applied to insects are limited to very simple associative Stimulus-Response research paradigms. If the(More)
A model of individual foraging in social insects as presented that formalises the dynamics of foraging and concentrates on the collective rather than the individual benefit, quantifying the relationships between a colony's foraging area, number of foragers and foraging energy budget and the food sources' rate of arrival, disappearance and capture. A series(More)
Thirteen colonies of Dinoponera quadriceps were studied in the field in Brazil. Dissection of all workers showed that each worker has ovaries with 6 ovarioles/ovary and a functional spermatheca. Moreover, the continuity of ovarian physiological states among workers is remarkable. Egg laying is performed by mated worker ( = gamergates) but also by few(More)
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