X-Message-Number: 29686
Date: Sat, 28 Jul 2007 21:34:25 -0700 (PDT)
From:
Subject: 238'th update on fly longevity experiments
This is the 238'th update of my fly longevity experiments. Average
temperature was 24.4 C during this run. Estimated maximal longevity using
the formula (363 - T*11.2) is 90 days.
This run was started immediately after a water advisory was lifted in
Vancouver, BC. I was interested in seeing if the still somewhat dirty tap
water would affect fly longevity. Phylloquinone showed an advantage in
run #193, and this run retests this item. I heated some fly food in an
oven for 30 minutes at about 150 C to see if glycotoxins can affect fly
longevity.
Dirty tap water was no trouble for flies, possibly because of
increased use of chloride. Phylloquinone turned out to be a dud this
time. Heated fly food did indeed reduce longevity. However this could be
due to one of two possible explanations. Either glycotoxins were harming
the flies, or the heating had destroyed enough heat labile nutrients to
cause malnutrition. Run #239 will further examine these two
explanations.
Run #238 Percent Survival on Day
supplement 4 11 20 27 35 42 51 63 71 81 87 94 107
______________________________________________________________
control one 97 97 79 76 61 49 33 18 6 3 3 3 0
control two 100 97 87 62 57 43 27 3 0 - - - -
chrysin 63 mg 100 92 90 74 61 40 32 8 0 - - - -
" 125 mg 97 94 76 70 55 33 24 6 0 - - - -
dandelion 125 mg 97 88 82 61 39 24 21 6 3 0 - - -
" 500 mg 100 90 87 83 73 60 40 7 7 0 - - -
phylloquinone 1250 mg 100 96 80 76 64 36 32 20 12 0 - - -
" 2500 mg 100 97 91 85 67 58 27 6 0 - - - -
heated fly food 100 97 86 78 28 6 3 0 - - - - -
heated fly food 91 88 85 64 18 0 - - - - - - -
"dirty" tap water 100 90 81 74 58 52 19 10 7 3 3 0 -
"dirty" tap water 97 91 88 84 72 63 50 19 3 0 - - -
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