X-Message-Number: 21798
Date: Sat, 24 May 2003 12:34:54 -0700 (PDT)
From: Doug Skrecky <>
Subject: 89'th update on fly longevity experiments

    This is the 89'th update of my fly longevity experiments. Average
temperature was 19.8 C during this run. Estimated maximal longevity using
the formula (363 - T*11.2) is 141 days.
    Here I repeat run #75, which examined the effect of fly number per
bottle on longevity. That experiment found that longevity was best with
fly numbers below 10, though this result was not statistically
significant. The current run suggests that the previous result was due to
chance.
    The 13 fly bottle has set a new record for "control" maximum
longevity, beating the previous record of 93 days set back in run #39.

Run #89                               Percent Survival on Day
supplement 13  19  26  32  37  43 48 53 60 67 72 77 82 89 95 101
________________________________________________________________
24 flies   96  96  96  96  92  92 88 88 67 50 21 17 13  0  -   -
13 flies   92  92  85  85  77  77 69 62 46 38 38 31 31 15  8   0
11 flies  100 100  82  73  64  64 55 55 18 18 18  9  0  -  -   -
11 flies  100 100 100 100 100 100 91 73 55 45 27 18 18  0  -   -
9 flies   100  89  89  89  78  67 67 67 44 44 33 22 11  0  -   -
4 flies    75  75  50  50  50  50 25  0  -  -  -  -  -  -  -   -

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