Le Bohec et al10.1073/pnas.0712031105XXYYYYY104.
Table 3. Environmental variables examined
|
Study periods |
||||||
|
Variables |
Annual breeding cycle |
Winter |
Summer |
Spring and summer |
Chla bloom |
Time lag, years |
|
Sea surface temperature (SST) |
||||||
|
Sectors |
Mean mini and maxi (date) |
Mean |
Mean |
0-2 |
||
|
Crozet: |
Mean |
Mean |
||||
|
South Crozet: |
Mean per each 2° of latitude |
Mean per each 2° of latitude |
Ø |
Ø |
0-2 |
|
|
Chlorophyll-a concentration [Chla] |
||||||
|
Crozet : |
Mean |
Ø |
Maxi (date) |
Mean |
Mean |
0 |
|
Southern Oscillation Index (SOI) |
Mean |
Mean |
Mean |
Ø |
Mean |
0-2 |
Mean values of sea surface temperature (SST, °C) and Chlorophyll-a concentration ([Chla], mg.m-3) in the area centered on Crozet Islands (43-47°S, 46-56°E), of SST in the South sector of Crozet Archipelago (48-60°S, 46-56°E) and of SOI were calculated according to different periods. Minimum SST, maximum SST, maximum [Chla] and their associated time were also determined for the sector of Crozets. Time lags were tested from 0 (year t) to 2 (year t - 2). Ø, not tested.