X-Message-Number: 23628
Date: Sun, 14 Mar 2004 20:57:20 -0800 (PST)
From: Doug Skrecky <>
Subject: 129'th update on fly longevity experiments
This is the 129'th update of my fly longevity experiments. Average
temperature was 20.8 C during this run. Estimated maximal longevity using
the formula (363 - T*11.2) is 130 days.
Here I retest French lentils. Although maximum lifespan was again
increased, I'm still not convinced that this was not due to chance.
The most intriguing result this time was not something that would show
up in the survival statistics. Flies fed New Roots brand of sterols &
sterolins showed an unusual ability to continue flying at advanced ages.
I'd been recording flying ability on a four point scale for quite some
time, but had never mentioned this before since no note worthy results had
showed up, before this run. At 90 days of age all sterol fed flies were
still capable of flight, as defined by being able to remain aloft for the
full width of the milk bottle (3 inches). By comparison none of control
flies could fly at 83 days of age. Even at 99 days of age, some sterol fed
flies could still take flight, which is an anomaly I have never before
observed. Run #137 takes a second look at sterols, both by themselves, as
well as in combination with some other supplements, to try to counter the
negative effect sterols apparently have on early mortality.
Run #129 Percent Survival on Day
supplement 25 31 37 46 58 69 78 83 90 99 110 119
____________________________________________________________________
control one 84 80 68 48 36 28 16 12 8 0 - -
control two 83 78 78 44 39 26 9 4 4 0 - -
coffee 1/2 tsp 71 71 62 48 24 14 5 5 5 0 - -
coffee 2 tsp 100 87 80 67 60 33 27 20 13 13 0 -
lentils, French 5% 78 70 65 57 30 17 9 9 4 0 - -
lentils, French 20% 60 60 47 27 27 13 7 7 7 7 7 0
sterols 108 mg 53 53 53 53 47 42 42 42 26 16 0 -
sterols 432 mg 65 65 65 60 50 40 35 35 35 15 0 -
tea leaf,green,decaf 1/2 tsp 75 75 75 58 58 42 33 17 0 - - -
tea leaf,green,decaf 2 tsp 67 56 56 56 33 11 11 11 0 - - -
tea leaf,OrangePekoe 1/2 tsp 100 100 90 90 70 60 40 30 10 10 0 -
tea leaf,OrangePekoe 2 tsp 100 67 58 50 25 25 17 0 - - - -
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