An assessment of spatio-temporal relationships between nocturnal bird migration traffic rates and diurnal bird stopover density

Table 2 Spring and fall nightly correlations preceding and following daily transect counts

Season	Method	Metric	Preceding night			Following night
Season	Method	Metric	r	95 % CI	n	r	95 % CI	n
Spring	WSR	Magnitude	0.316	0.021 to 0.572	65	0.435	0.145 to 0.672	61
	WSR	Flux	0.161	−0.121 to 0.428	63	0.547	0.324 to 0.726	59
	TI	Magnitude	0.015	−0.238 to 0.265	68	0.174	−0.127 to 0.452	61
	TI	Flux	0.059	−0.206 to 0.320	66	0.598	0.386 to 0.760	59
Fall	WSR	Magnitude	0.538	0.292 to 0.734	47	0.457	0.186 to 0.677	47
	WSR	Flux	−0.143	−0.442 to 0.172	45	−0.010	−0.334 to 0.315	45
	TI	Magnitude	0.067	−0.481 to 0.566	26	0.004	−0.481 o 0.481	26
	TI	Flux	−0.001	−0.439 to 0.437	24	−0.029	−0.457 to 0.403	24

Bayesian Pearson’s correlation coefficients (r) of pairwise correlation tests among migration traffic rates across nights during the spring (2011–12) and fall (2011–12). Daily mean stopover estimates were correlated with mean nocturnal traffic estimates preceding the transect count and following to the transect count. Comparisons were made on trended (magnitude) and detrended (flux) traffic and stopover measures. Credible intervals not overlapping zero are highlighted in bold. WSR = weather surveillance radar, TI = thermal infrared camera

ISSN: 2051-3933