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Table 4 Summary of two-way ANOVA with fixed factors (year and site) for the analysis of copepod density and biomass considering each copepod size fraction and their sum

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

  All >300 μm fraction <300 μm fraction
df F-ratio P df F-ratio P df F-ratio P
Factor—DENSITY DATA
 Site (SA, A) 1.46 39.86 <0.001 1.46 17.15 <0.001 1.46 25.86 <0.001
 Year (2000, 2001 & 2003) 2.46 8.72 <0.001 2.46 1.57 0.217 2.46 7.52 0.001
 Site × Year 2.46 1.56 0.22 2.46 1.51 0.230 2.46 0.86 0.429
Factor—BIOMASS DATA
 Site (SA, A) 1.46 110.01 <0.001 1.46 99.07 <0.001 1.46 64.32 <0.001
 Year (2000, 2001 & 2003) 2.46 12.50 <0.001 2.46 5.80 0.005 2.46 11.44 <0.001
 Site × Year 2.46 0.30 0.741 2.46 7.12 0.002 2.46 1.62 0.207
  1. SA samples from Subantarctic waters (N: 20), A samples from Antarctic waters (N: 32), df degrees of freedom, significant P values are indicated in bold