Haemolymph esterases in the female larval honeybee, Apis mellifera L., during caste development

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Abstract
The haemolymph esterase patterns were obtained for eight ages during larval development of the two female castes of the honeybee, Apis mellifera L., by starch gel electrophoresis. Qualitatively, the patterns differed markedly with age within and between the castes. Quantitatively, esterase activity is higher in workers up to 72 hours of age and thereafter shows a general decline, whereas in queens the activity is lower up to 72 hours of age and is followed by a general increase. In both castes the activity is slightly increased towards prepupal stage. The significance of these results is discussed in relation to female dimorphism.

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