Demography of a small, isolated tiger (Panthera tigris tigris) population in a semi-arid region of western India

Table 1 Sampling details and parameters estimates of tiger density from camera trap based spatial capture-recapture analysis in Ranthambhore Tiger Reserve

Year	No. of camera locations	Camera trap Polygon (km²)	Trap Nights	M_t + 1 ^a	\( \widehat{N} \) ^b(SE)	P^e	Known tiger population > 1 Year			\( \widehat{D} \) (SE)^d /100km² (CI_95%)	Known density^c /100km²	g0 (SE)	σ (SE) Km
Year	No. of camera locations	Camera trap Polygon (km²)	Trap Nights	M_t + 1 ^a	\( \widehat{N} \) ^b(SE)	P^e	♂	♀	Cub	\( \widehat{D} \) (SE)^d /100km² (CI_95%)	Known density^c /100km²	g0 (SE)	σ (SE) Km
2006	40	139	48	16	16 (0.73)	1.0	5^f	15^f	15^f	4.62 (1.19) (2.81–7.59)	–	♀: 0.06 (0.009)	2023.0 (131.6)
2006	40	139	48	16	16 (0.73)	1.0	5^f	15^f	15^f	4.62 (1.19) (2.81–7.59)	–	♂: 0.03 (0.007)	4162.6 (430.4)
2009	48	162	28	25	26 (1.52)	0.96	19^f	17^f	2^f	8.75 (1.79) (5.88–13.02)	–	♀: 0.05 (0.009)	1547.0 (110.2)
2009	48	162	28	25	26 (1.52)	0.96	19^f	17^f	2^f	8.75 (1.79) (5.88–13.02)	–	♂: 0.05 (0.009)	1564.4 (104.3)
2012	60	223	45	22	30 (3.9)	0.73	12	16	6	5.68 (1.22) (3.74–8.64)	5.60	♀: 0.08 (0.008)	1529.0 (81.7)
2012	60	223	45	22	30 (3.9)	0.73	12	16	6	5.68 (1.22) (3.74–8.64)	5.60	♂: 0.08 (0.007)	2136.9 (97.2)
2013	76	464	51	37	40 (2.62)	0.92	18	20	14	7.56 (1.25) (5.47–10.44)	7.60	♀: 0.05 (0.005)	1480.7 (85.5)
2013	76	464	51	37	40 (2.62)	0.92	18	20	14	7.56 (1.25) (5.47–10.44)	7.60	♂: 0.05 (0.005)	1948.7 (83.3)
2014	182	492	48	39	39 (1.38)	1.0	21	21	12	7.22 (1.16) (5.27–9.88)	7.63	♀: 0.05 (0.006)	1496.5 (73.3)
2014	182	492	48	39	39 (1.38)	1.0	21	21	12	7.22 (1.16) (5.27–9.88)	7.63	♂: 0.04 (0.003)	2161.7 (78.4)

^aM_t + 1: Unique adult tigers photo-captured in camera traps
^b \( \widehat{N} \): Population estimates derived from spatially explicit capture recapture technique (regional population size using ‘region.N’);
^cKnown density: Known tiger population/ tiger occupied area ♂: Male; ♀: Female
^d \( \widehat{D} \): Density estimates (model averaged); g0: detection probability at home range center; σ: movement parameter
^eP: Proportion of the population detected by camera trap survey
^fSince all tigers were not photo-captured, here we have reported the minimum number of known individuals

ISSN: 2056-3132