Subject: Seal Mac Data (the answers) (fwd)
mike williamson (williams@www1.wheelock.edu)
Fri, 5 Sep 1997 14:47:01 -0400 (EDT)
Date: Fri, 05 Sep 1997 12:44:22 -0500
From: Greg Early <gearly@neaq.org>
To: williams@whale.simmons.edu
Subject: Mac Data (the answers)
DEPTH
depth in meters 0-40 40-104 104-200 200-300 300-400 400-504 504-600 600-704
704-1000 >1000 TOTAL
DATE DIVES
7/28-8/6 117 147 42 31 1 0 0 0 0 0 338
35% 43% 12% 9% 0% 0% 0% 0% 0% 0%
8/7-8/16 56 6 20 24 0 0 0 0 0 0 106
53% 6% 19% 23% 0% 0% 0% 0% 0% 0%
8/16-8/25 121 14 74 159 29 6 0 0 0 0 403
30% 3% 18% 39% 7% 1% 0% 0% 0% 0%
8/26-9/4 66 7 34 115 7 0 0 0 0 0 229
29% 3% 15% 50% 3% 0% 0% 0% 0% 0%
TOTAL 360 174 170 329 37 6 0 0 0 0 1076
33% 16% 16% 31% 3% 1% 0% 0% 0% 0%
DURATION
minutes 0-2 2-5 5-10 10-15 15-20 20-25 25-35 35-45 45-60 >60 TOTAL
DATE DIVES
7/28-8/6 161 3 231 6 9 0 0 0 0 3 413
39% 1% 56% 1% 2% 0% 0% 0% 0% 1%
8/7-8/16 81 2 81 1 0 1 0 0 0 5 171
47% 1% 47% 1% 0% 1% 0% 0% 0% 3%
8/16-8/25 42 0 38 37 3 0 0 0 0 0 120
35% 0% 32% 31% 3% 0% 0% 0% 0% 0%
8/26-9/4 66 1 48 133 4 0 1 1 0 0 254
26% 0% 19% 52% 2% 0% 0% 0% 0% 0%
TOTAL 350 6 398 177 16 1 1 1 0 8 958
37% 1% 42% 18% 2% 0% 0% 0% 0% 1%
Time at Depth
depth in meters 0-40 40-104 104-200 200-300 300-400 400-504 504-600 600-704
704-1000 >1000
DATE
7/28-8/6 44% 35% 19% 1% 0% 0% 0% 0% 0% 0%
8/7-8/16 34% 33% 20% 13% 0% 0% 0% 0% 0% 0%
8/16-8/25 32% 24% 27% 17% 1% 0% 0% 0% 0% 0%
8/26-9/4 29% 17% 26% 27% 1% 0% 0% 0% 0% 0%
TOTAL 34% 25% 24% 16% 1% 0% 0% 0% 0% 0%
OK,
So here are the answers plus some "Time at Depth" data as well. It looks
like Mac is spending most of his time around 200-300 meters deep. The
pattern seems to show that he is gradually going deeper since his release.
This would be a good thing as he grows and gets used to deep diving again.
This looks like what is going on because although he splits about half and
half between shallow dives and dives to 200-300 meters, in the past 10 days
over half of his dives have been to the deeper depth (in contrast to only
@12% immediately after he was released)
His duration pattern seems to be similar, with longer dives starting to show
up more frequently in the last ten days. He now appears to be doing about
half of his dives in the 10-15 minute range. Although every so often he
does aa really long dive of over 60 minutes.
The time at depth data also looks like he is spending more time at deeper
depths recently than immediately after he was released. This looks like he
is spending about 27% of his time between 200-300 meters. It also looks
like his very longs dives may be relatively shallow.
Although things are still pretty sketchy that's what I think is going on.
Regards,
ge
Greg Early
Edgerton Research Laboratory
New England Aquarium
Central Wharf
Boston, Mass 02110
617-973-5246 (phone)
617-723-6207 (FAX)
gearly@neaq.org