ref	dens	surv
"Gavotte et al., 2009"	50	0.988458624
"Gavotte et al., 2009"	125	0.98576749
"Gavotte et al., 2009"	250	0.990271721
"Gavotte et al., 2009"	500	0.975004
"Gavotte et al., 2009"	1000	0.938130153
"Gavotte et al., 2009"	2000	0.9402638
