From:
Tonytclarke@aol.com
Date: 2006-06-21 21:53:57 UTC
Subject: [ferrethealth] RE: Light and Dark issue
To: ferrethealth@smartgroups.com
>From the table below it is clear that ferrets in South Florida (26 deg N) =
compared to ferrets in Seattle (50 deg N) have a smaller difference in Dece=
mber/June daylight hrs. 4 hrs compared to 8 hrs.. Also the further north y=
ou are the longer the dawn/dusk (crepescular) periods.
Has anyone attempted to analyse the rates of adrenal disease at extremes of=
latitude. For instance low rates of adrenal disease in the UK may be due m=
ore to latitude (50-60 deg approx, the same as Canada) and not, as sometime=
s postulated,
genetic and/or husbandry.
Does anyone in Canada have experience to support this latitude idea.
Apologies to anyone in the southern hemisphere, I haven't ignored you but y=
ou get the idea ;).
Length of Day at Various Latitudes (in Hours and Minutes on the 15th of Eac=
h Month) =
Month Equator 10=B0 20=B0 30=B0 40=B0 50=B0 60=B0 70=B0 80=B0 Pol=
es
January 12:07 11:35 11:02 10:24 9:37 8:30 6:38 0:00 0:00 0:00 =
February 12:07 11:49 11:21 11:10 10:42 10:07 9:11 7:20 0:00 0:00 =
=
March 12:07 12:04 12:00 11:57 11:53 11:48 11:41 11:28 10:52 0:00 =
=
April 12:07 12:21 12:36 12:53 13:14 13:44 14:31 16:06 24:00 24:00=
=
May 12:07 12:34 13:04 14:22 15:22 17:04 22:13 24:00 24:00 24:00 =
=
June 12:07 12:42 13:20 14:04 15:00 16:21 18:49 24:00 24:00 24:00 =
=
July 12:07 12:40 13:16 13:56 14:49 15:38 17:31 24:00 24:00 24:00
August 12:07 12:28 12:50 13:16 13:48 14:33 15:46 18:26 24:00 24:0=
0 =
Sept 12:07 12:12 12:17 12:23 12:31 12:42 13:00 13:34 15:16 24:00 =
=
October 12:07 11:55 11:42 11:28 11:10 10:47 10:11 9:03 5:10 0:00 =
=
Nov 12:07 11:40 11:12 10:40 10:01 9:06 7:37 3:06 0:00 0:00 =
Dec 12:07 11:32 10:56 10:14 9:20 8:05 5:54 0:00 0:00 0:00
I haven't worked out how to get a formatted table to post correctly so the =
above may become scrambled.
Tony
=
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