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Table 5 Results of stepwise multiple regression analyses for the dependent variables copepod density or biomass considering each copepod size fraction and their sum (log transform data) and the independent environmental variables (AVHRR-SST, AVHRR-SSTa, SeaWIFS Chl a, seawater temperature, salinity) during the three cruises

From: Interannual fluctuations in copepod abundance and contribution of small forms in the Drake Passage during austral summer

Dependent variable Statistically significant independent variable B SE B P-value R 2
Biomass
 <300-μm fraction SST 0.588 0.081 <0.001 0.72
SSTa −0.366 0.084   
 Total SST 0.634 0.082 <0.001 0.69
SSTa −0.376 0.084   
 Oithona similis SST 0.567 0.085 <0.001 0.68
SSTa −0.355 0.089   
 Nauplii SST 0.557 0.090 <0.001 0.64
SSTa −0.379 0.093   
 >300-μm fraction SST 0.532 0.115 <0.001 0.40
SSTa −0.289 0.119   
Density
 Total SSTa −0.387 0.118 <0.001 0.39
SST 0.412 0.111   
 < 300 μm fraction SSTa −0.403 0.121 <0.001 0.36
SST 0.341 0.113   
 Nauplii SST 0.399 0.113 <0.001 0.36
SSTa −0.329 0.121   
 Oithona similis SSTa −0.363 0.124 0.002 0.22
SST 0.275 0.124   
 >300-μm fraction SST 0.329 0.127 0.011 0.20
SSTa −0.309 0.135   
  1. Only significant relationships are shown
  2. SST AVHRR sea surface temperature, SSTa AVHRR sea surface temperature anomaly, Chl a: SeaWIFS chlorophyll a, B (beta) is the standardized regression coefficient or the slope of the least squares line. SE B is the standard error of beta