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| Science Forum Index » Life Extension Forum » 199'th update on fly longevity experiments |
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| Doug Skrecky |
 Posted: Sun Oct 09, 2005 8:47 am |
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Guest
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This is the 199'th update of my fly longevity experiments. Average
temperature was 27.8 C during this run. Estimated maximal longevity using
the formula (363 - T*11.2) is 52 days.
This run retests some spices. Cardamon in run #8, and marjoram in run
#10 offered a slight advantage over controls, while tarragon at a 1/4 tsp
dosage offered far better survival than controls in runs #55 and #63.
I wasn't too surprised to see that cardamon and marjoram turned out
to be duds this time, given their unconvincing performances in past runs.
However tarragon did prove to be a major disappointment. Although
tarragon bested both cardamon and marjoram at all doses, it still could
not beat the control bottles. I attribute this difference to the fact
that I use only relatively fresh fly food in my experiments now. I order
smaller amounts of this, on a more frequent basis. I suspect many of my
earlier "hits" occurred when additives helped suppress bacterial growth
when "old" fly food was used.
The maximum survival of just 32 days in this run is probably due to
the use of an "old" breeding bottle. In fact so few flies were found in
one breeder, that it has to be combined with a second to yield enough
flies to start this run. An increase in breeding bottle turnover has
since been instituted.
Run #199 Percent Survival on Day
supplement 13 20 26 32 38
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control one 41 22 15 0 -
control two 63 40 13 7 0
cardamon 1/8 tsp 29 19 5 0 -
" 1/4 tsp 19 10 5 0 -
" 1/2 tsp 6 6 0 - -
marjoram 1/8 tsp 20 7 0 - -
" 1/4 tsp 13 6 0 - -
" 1/2 tsp 0 - - - -
tarragon 1/8 tsp 46 39 8 0 -
" 1/4 tsp 44 17 6 6 0
" 1/2 tsp 23 8 0 - - |
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| DZ |
| Posted: Sun Oct 09, 2005 2:08 pm |
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Guest
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Doug Skrecky <oberonSPAMBLOCK@vcn.bc.ca> wrote:
[quote:735b50c5ee]This is the 199'th update of my fly longevity experiments. Average
temperature was 27.8 C during this run. Estimated maximal longevity using
the formula (363 - T*11.2) is 52 days.
This run retests some spices. Cardamon in run #8, and marjoram in run
#10 offered a slight advantage over controls, while tarragon at a 1/4 tsp
dosage offered far better survival than controls in runs #55 and #63.
I wasn't too surprised to see that cardamon and marjoram turned out
to be duds this time, given their unconvincing performances in past runs.
However tarragon did prove to be a major disappointment.
[/quote:735b50c5ee]
For this to make sense to a reader there should at least be another
column to the tables showing the number of flies in each group. You
wouldn't be able to publish it the way you're presenting the data. For
all I know all the reported differences in every of your experiments
are just sampling noise.
DZ
[quote:735b50c5ee]Although tarragon bested both cardamon and marjoram at all doses, it
still could not beat the control bottles. I attribute this
difference to the fact that I use only relatively fresh fly food in
my experiments now. I order smaller amounts of this, on a more
frequent basis. I suspect many of my earlier "hits" occurred when
additives helped suppress bacterial growth when "old" fly food was
used.
The maximum survival of just 32 days in this run is probably due to
the use of an "old" breeding bottle. In fact so few flies were found in
one breeder, that it has to be combined with a second to yield enough
flies to start this run. An increase in breeding bottle turnover has
since been instituted.
Run #199 Percent Survival on Day
supplement 13 20 26 32 38
________________________________
control one 41 22 15 0 -
control two 63 40 13 7 0
cardamon 1/8 tsp 29 19 5 0 -
" 1/4 tsp 19 10 5 0 -
" 1/2 tsp 6 6 0 - -
marjoram 1/8 tsp 20 7 0 - -
" 1/4 tsp 13 6 0 - -
" 1/2 tsp 0 - - - -
tarragon 1/8 tsp 46 39 8 0 -
" 1/4 tsp 44 17 6 6 0
" 1/2 tsp 23 8 0 - -
[/quote:735b50c5ee] |
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