Abstract
SummaryUnder the subtropical climate of Ribeirao Preto, Brazil, the relationships between age and survival in worker bees were studied with Apis mellifera and a stingless bee (Plebeia droryana), using 3 colonies of each. In contrast to colonies in the temperate region, winter workers of A. mellifera did not show a prolongation of life span. A marked prolongation was observed in workers of two broodless colonies of P. droryana, one queenless and the other not, compared with a normal brood-rearing colony. In the normal colony, workers changed activities in relation to age as they do in A. mellifera, but their mean life span was much longer.
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