BMC Ecology

Table 1 Western burrowing owl population density between 2010 and 2011 in Mexican prairie dog colonies in NL and SLP, Mexico

From: Population density of the western burrowing owl (Athene cunicularia hypugaea) in Mexican prairie dog (Cynomys mexicanus) colonies in northeastern Mexico

Model^a	D^b	N^c	Estimated density (owl/ha)			CV^f	No. colony^g	Area (ha)
Model^a	D^b	N^c	Average	95 % IC^d	95 % IC^e	CV^f	No. colony^g	Area (ha)
Global
2010
	0.1	119	949	788	1039	0.107	9	9620*
			2026	1765	2326		50	20,529**
2011
	0.09	116	944	783	1035	0.108	9	9620*
			2015	1753	2317		50	20,529**
NL
2010
	0.08	100	809	698	937	0.114	6	9170*
			1747	1508	2024		50	20,529**
2011
	0.074	82	678	578	794	0.124	6	9170*
			1464	1248	1716		50	20,529**
SLP
2010
	0.26	19	118	37	87	0.236	3	450*
			190	60	141		12	727**
2011
	0.47	34	211	48	167	0.180	3	450*
			341	170	397		12	727**

^*Total area of sampled colonies
^**Total area of colonies in SLP and NL
^aModel base done AIC criteria: half-normal + cosine
^bWestern burrowing owl density (owl/ha)
^cTotal number of detections in both years
^dUpper confidence intervals
^eLower confidence intervals
^fVariation coefficient for the estimated density
^gNumber of Mexican prairie dog colonies

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ISSN: 1472-6785

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