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Table 1 Extrinsic and intrinsic variables considered in the analysis, and variables included in the IT-AICc models

From: Inter-annual variability of the effects of intrinsic and extrinsic drivers affecting West Nile virus vector Culex pipiens population dynamics in northeastern Italy

Variable Description Included in IT-AICc approacha
GMP Density dependent variables measuring the saturation of the carrying capacity Yes
DT.h Length of daylight (hours) Yes
DMI15d De Martonne aridity index in 15 days prior to capture (mm/°C) Yes
GDD15d Growing degree days in 15 days prior to capture Yes
NDVI15d Maximum normalized difference vegetation index in 15 days prior to capture Yes
PREC Daily cumulative precipitation (mm) Yes
PREC.avg15d Average cumulative precipitation in 15 days prior to capture (mm) No
PREC.k15d Precipitation kurtosis in 15 days prior to capture (mm) Yes
PREC.sd15d Precipitation standard deviations in 15 days prior to capture (mm) No
T.avg15d Average temperature in 15 days prior to capture (°C) No
T.k15d Temperature kurtosis in 15 days prior to capture (°C) Yes
T.sd15d Temperature standard deviations in 15 days prior to capture (°C) Yes
T.night Average temperature recorded during the overnight capture period (18:00–6:00 h) (°C) Yes
  1. aSome variables were excluded due to collinearity