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Table 1 Mean and SD of δ 15 N and δ 13 C values and range (minimum and maximum) C/N ratio in blood

From: Resource partitioning between incubating and chick-rearing brown boobies and red-tailed tropicbirds on Christmas Island

  Sample,n δ15N (‰) δ13C (‰) C/N
   Mean (SD) Mean (SD) Range
BRBO     
Incubation   12.17 (0.11) −16.71 (0.14) 0.29 to 0.32
  Males 10 12.12 (0.07) −16.72 (0.11) 0.31 to 0.32
  Females 9 12.23 (0.12) −16.68 (0.18) 0.29 to 0.32
Chick rearing   12.31 (0.23) −16.88 (0.22) 0.30 to 0.33
  Males 27 12.25 (0.18) −16.88 (0.24) 0.31 to 0.32
  Females 27 12.35 (0.28) −16.84 (0.18) 0.31 to 0.34
RTTB     
Incubation   12.63 (0.23) −16.96 (0.17) 0.30 to 0.32
  Males 10 12.62 (0.31) −16.99 (0.18) 0.30 to 0.32
  Females 9 12.63 (0.13) −16.94 (0.16) 0.31 to 0.32
Chick rearing   12.68 (0.27) −16.91 (0.19) 0.29 to 0.32
  Males 14 12.74 (0.27) −17.09 (0.38) 0.31 to 0.32
  Females 13 12.62 (0.41) −16.93 (0.27) 0.29 to 0.31