Table 4

Species distribution of markers

Fecal sourceNo. of samplesNo. (%) of samples that amplified with the following marker:
TotalFrom New ZealandGFBGFCGFDTotala
Gull731219 (26)47 (64)43 (59)51 (70)
Goose106121 (1)3 (3)72 (68)73 (69)
Duck76120 (0)3 (4)58 (76)59 (78)
Chicken9886 (6)4 (4)42 (43)44 (45)
Human110 (0)0 (0)0 (0)0 (0)
Sewage11110 (0)0 (0)0 (0)0 (0)
Cat940 (0)0 (0)0 (0)0 (0)
Dog16120 (0)0 (0)0 (0)0 (0)
Cow24120 (0)0 (0)0 (0)0 (0)
Horse1860 (0)0 (0)0 (0)0 (0)
Sheep34120 (0)12 (35)0 (0)12 (35)
Goat12120 (0)0 (0)0 (0)0 (0)
Deer90 (0)0 (0)0 (0)0 (0)
Pig50 (0)0 (0)0 (0)0 (0)
Rabbit12122 (17)0 (0)0 (0)2 (17)
Rodent30 (0)0 (0)0 (0)0 (0)
Possum12120 (0)0 (0)0 (0)0 (0)
Sea lion220 (0)0 (0)0 (0)0 (0)
Dolphin90 (0)0 (0)0 (0)0 (0)
Elephant seal100 (0)0 (0)0 (0)0 (0)
Harbor seal10/00 (0)0 (0)0 (0)
Godwit21 (50)1 (50)0 (0)2 (100)
Sandpiper131 (8)3 (23)4 (31)7 (54)
Coot21 (50)0 (0)2 (100)2 (100)
Pigeon131 (8)0 (0)2 (15)3 (23)
Cormorant30 (0)0 (0)2 (67)2 (67)
Egret30 (0)0 (0)2 (67)2 (67)
Pelican40 (0)1 (25)4 (100)4 (100)
Tern30 (0)0 (0)1 (33)1 (33)
Crow10 (0)0 (0)1 (100)1 (100)
Swan884 (50)1 (13)8 (100)8 (100)
Pukeko10100 (0)9 (90)0 (0)9 (90)
Avian specificityb0.990.981.00
Avian sensitivityc0.080.170.57
Gull specificityd0.970.940.64
Gull sensitivitye0.260.640.58
  • a The total number (percentage) of each source that was detected by at least one marker.

  • b Avian specificity = true negativenonavian/(true negativenonavian + false positivenonavian).

  • c Avian sensitivity = true positiveavian/(true positiveavian + false negativeavian).

  • d Gull specificity = true negativenongull/(true negativenongull + false positivenongull).

  • e Gull sensitivity = true positivegull/(true positivegull + false negativegull).