X-Message-Number: 22811
Date: Sun, 9 Nov 2003 15:17:59 -0800 (PST)
From: Doug Skrecky <>
Subject: 112'th update on fly longevity experiments

    This is the 112'th update of my fly longevity experiments. Average
temperature was 25.8 C during this run. Estimated maximal longevity using
the formula (363 - T*11.2) is 74 days.
    Here I retest some previous items. Beet, canned coffee/milk, and
spinach all improved survival in earlier experiments. Both the coffee, and
milk components of coffee/milk are examined separately as well. Since all
flies are stored in the dark, I also check to see if a vitamin D
deficiency may be influencing survival.
    Neither beet nor spinach increased survival this time, so the previous
results must have been due to chance. No benefit was seen for vitamin D,
but 10% skim milk may have been helpful. Coffee by itself, and to a lesser
degree coffee/milk appeared to offer a survival advantage early in the
experiment.

Run #112                  Percent Survival on Day
supplement          4   9 15 20 25 30 35 40 46 52 57 63 69
__________________________________________________________
control one        98  91 82 70 57 43 30 23 11  2  2  2  0
control two       100  83 83 61 44 22 11 11  6  0  -  -  -
beet 50%           96  92 88 79 63 58 21 17  4  0  -  -  -
coffee 1/2 tsp    100  89 89 89 85 81 41 22 15  0  -  -  -
coffee/milk       100  91 87 83 70 48 39 22 13  0  -  -  -
skim milk 10%      96 100 96 88 72 56 40 36 20  8  0  -  -
skim milk 20%      97  93 90 73 57 40 30  7  3  0  -  -  -
skim milk 100%    100  95 90 75 60 35 10  0  -  -  -  -  -
spinach 13%       100  92 83 75 50 33 25 21 13  8  0  -  -
spinach 50%       100 100 87 87 73 53 20  7  0  -  -  -  -
vitamin D 25 IU   100  94 77 59 35 35 24 12  6  0  -  -  -
vitamin D 100 IU  100 100 84 79 74 63 26 11  5  0  -  -  -

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