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Absence of individual sterility in thelytokous colonies of the ant Cerapachys biroi Forel (Formicidae, Cerapachyinae)
This reproductive strategy, scarce among Formicidae, was studied in C. biroi, an obligatory thelytokous cerapachyine ant and it was revealed that no sterile caste was present in the colonies and reproduction was linked both to a temporal polyethism and to a morphologicalpolyethism.
The reproductive cycle of thelytokous colonies of Cerapachys biroi Forel (Formicidae, Cerapachyinae)
This repeated phasic reproductive cycle where adult activity and development of the brood are synchronised reminds that of true army ants (subfamily Ecitoninae), which brings new arguments in favour of a filiation between both groups.
Firstborns’ Disadvantage in Kinship Detection
In simple cognitive tasks based on matching face pictures, later-borns surpassed firstborns in detecting kinship among strangers; this pattern was found in populations of different ages and in two countries.
Brood stimulation controls the phasic reproductive cycle of the parthenogenetic ant Cerapachys biroi
A primacy of larval influence is suggested: the foraging phase was triggered and sustained by larvae- induced excitement rather than by stimulation from the newly-emerged callows, suggesting the periodicity of the cycle is not controlled by an endogenous rhythm in adults.
The evolutionary fate of parthenogenetic ants ' societies
The hypothesis that evolution towards parthenogenesis may be constrained by some aspects of social organisation that would act as proximate mechanisms for the maintenance of sex is venture.