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Table 1 Geographical origin, climatic data, values of reproductive function (e.g. clutch size) and biometry (mass of nestlings) for two populations of Rayaditos during the study year 2012

From: The relationship of telomere length to baseline corticosterone levels in nestlings of an altricial passerine bird in natural populations

Population Precipitations (SD) Coefficient of variation Temperature (SD) Coefficient of variation DMi (SD) Coefficient of variation Clutch size Nestling mass
North 124.63 1.23 11.18 17.31 0.45 (0.34) 120.64 2.44 (0.64) 12.75 (1.88)
(33° S) (1.83)   (1.89)
South 318.35 0.57 4.35 9.45 2.10 (1.13) 12.00 4.69 (0.89) 14.66 (1.25)
(55° S) (1.50)   (4.12)
  1. The de Martonne (DMi) aridity index was calculated following di Castri and Hajek (1976), based on the average of monthly temperatures and precipitation. The index is low in hot, dry deserts (low productivity) and high in cool, wet areas (high productivity). The mean annual temperature (calculated as the average of the monthly temperatures) and total annual precipitation are reported. The variances of precipitation (σ2 P) temperature (σ2 T) and de Martonne index (σ2 DMi) were estimated from the mean of monthly values
  2. DMi Martonne aridity index, Clutch size number of eggs, Nestling mass (g) weight of nestlings at 13 days old
  3. Climatic data were collected from < http://www.ceazamet.cl, http://www.meteochile.gob.cl/