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Table 1 Camera trapping sampling design and outcome of the pilot study and the two sessions (2014 and 2015) carried out in the study area (Arezzo province, Italy)

From: Estimation of pack density in grey wolf (Canis lupus) by applying spatially explicit capture-recapture models to camera trap data supported by genetic monitoring

 

Pilot Study

Session 2014

Session 2015

Total

Time period

1 April - 18 June 2014

19 June – 28 August 2014

10 January – 11 June 2015

 

MCP trap array (Km2)

–

414

560

 

Camera stations

7–20

26

45

 

Sampling occasions (days)

79

71

153

303

Mean sampling occasion/trap (SD)

 

58.9 (12.5)

55.9 (12.6)

 

Trap days

1094

1533

2570

5197

Wolf videos

194

265

450

909

Independent capture events (CE)

147

188

322

657

CE/100 trap days

13.44

12.26

12.53

12.64

Unusable CEa

31

24

75

130

Unassigned CEb

26

21

53

100

CE assigned to a pack

90

143

194

427

CE with focal animal (used)

69

98

128

295

  1. aLow quality videos (wolves far from the camera, passing without stopping, partially captured, presence of fog)
  2. bGood quality videos (but no focal animal identified)