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life span

Ted Brummel tbrummel at cco.caltech.edu
Tue Jan 5 05:23:30 EST 1999


The life span of flies varies according to temperature and strain and
media used for feeding.  For standard strains at 29 C life span is 25
days mean and 32-34 max., while at 25 it is 60 days mean and 80-92 max.
Their reproduction rate is also temperature dependent but at 25 C and
70% humidity it takes approximately 10 days from egg lay to adult, with
a 2-3 day lag until maximum egg laying rate.  Females will continue to
lay eggs well for several weeks.  The reproductive potential of properly
maintained flies is very high so you should have no problem getting more
flies than you know what to do with.  Flies will develop somewhat
faster at 29 but this is offset by a reduction in viability of many
stocks at high temperature.  At lower temperatures down to 16 C, flies
will develop slower and live longer in a temperature dependent manner,
so you can adjust the temperature to suit your needs.

good luck,

Ted

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Ted Brummel
Division of Biology
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California Institute of Technology
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Email : tbrummel at cco.caltech.edu
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