day
night
+
X
o
•
o •
o •
o .
o e
75' 30' W
~
.s
r
... a. w
o
-100
·200
-300
·500
0 .1-10
10-100
100-1000
1000-10000
>10000
73' 30'W
PACIFIC AREA
11
13
15
-700 '---'----'-__.__~---"----'
o 10
10' 10 5
Ind. 100 m· 3
.s
r
... a. w o
Depth range of occurrence: O - 700 m
Population core: 50 - 100 m
Temperature (T): 8.20 - 9.80 o c
Oxygen: 348.4 - 437.2 J.Jmol dm- 3
Chl fluorescence (F) 0.04 - 0.39
Obtusoecia antarctica 199
-- ----------· - ·- ----------------------------------- - - -
PATAGONIA
71 " 30' W
CENTRAL AREA
F o
.01
10
----'
11
13
15
T 5
O rr~-~-;-~-100
-21l0
-300
T
1 F
-40QLL_ll__ _
_ll_____.__-"-0
10
10 2 10 1
10'
10 '
Ind. 100 m · 3
.s
r
... a.
w
o
Depth range of occurrence: O - 400 m
Population core: 100 - 150 m
Temperature (T): 6.70 - 9.01 oc
Oxygen: 346.1 - 407.3 j.Jmol dm 3
Chl fluorescence (F) 0.05 - 0.27
53' 45' s
TIERRA DEL FU EGO
54' 45' s 1
69' 30' W
67 30'W
ATLANTIC AREA
F o
.o1
_1
1
10
'------'-- ._____ ---'-----'
T 5
11
13
15
a r-~-~~--~~
-100 '-----~-~------'----'
o 10 10 2 10 1 10' 10°
Ind. 100 m · 3
Depth range of occurrence: O - 80 m
Population core: 75 - 80 m
Temperature (T): 8.68 - 9.02 o c
Oxygen: 390.4 - 410.9 j.Jmol dm- 3
Chl fluorescence (F): 0.16 - 0.44
Fig. 6.8.3. Obtusoecia antarctica. Distribution in the Straits of Magellan in February-March 1991