. 2011 Sep 13;65(12):2305–2317. doi: 10.1007/s00265-011-1241-z

Table 2.

Models of the relationships between the distance a sedge warbler male shifts territory between season “t” and season “t + 1” (response variable in GLM analysis) and an explanatory binary variable describing a measure of breeding success (mating or nesting success in season “t”), the vegetation quality of season “t” territory, and the change of arrival date between consecutive seasons as covariates

Success measure	Change between seasons	Model					Underlying relationships and data
Success measure	Change between seasons	Predictors for season “t”	Estimate	SE	t	p	r	Previous-year success	Mean distance (m)	SD (n)	F
Mating success (all males)	1st vs 2nd	TWV	−0.86	0.233	−3.69	0.0003	−0.20*			(132)
		Success	−0.25	0.125	−1.97	0.051		0	310	365.4 (29)	7.98**
		Success	−0.25	0.125	−1.97	0.051		1	150	236.0 (103)	7.98**
		Δ arrival date	0.002	0.003	0.72	0.473
	2nd vs 3rd	TWV	−0.08	0.381	−0.21	0.832	−0.19			(39)
		Success	−0.13	0.179	−0.72	0.479		0	147	132.9 (11)	0.51
		Success	−0.13	0.179	−0.72	0.479		1	118	120.0 (28)	0.51
		Δ arrival date	−0.005	0.007	−0.73	0.471
	3rd vs 4th	TWV	−0.73	0.528	−1.38	0.198	−0.31			(14)
		Success	−0.60	0.315	−1.91	0.086		0	241	152.8 (3)	0.15
		Success	−0.60	0.315	−1.91	0.086		1	165	320.5 (11)	0.15
		Δ arrival date	−0.004	0.012	−0.35	0.732

Nesting success (mated males only)	1st vs 2nd	TWV	−0.83	0.277	−3.00	0.003	−0.09			(103)
		Success	−0.16	0.121	−1.32	0.189		0	215	328.8 (36)	4.40*
		Success	−0.16	0.121	−1.32	0.189		1	115	158.5 (67)	4.40*
		Δ arrival date	0.002	0.003	0.73	0.466
	2nd vs 3rd	TWV	0.137	0.536	0.26	0.800	0.01			(29)
		Success	−0.001	0.222	−0.01	0.995		0	111	101.3 (10)	0.04
		Success	−0.001	0.222	−0.01	0.995		1	120	128.3 (19)	0.04
		Δ arrival date	−0.001	0.010	−0.17	0.965
	3rd vs 4th	TWV	−0.658	0.632	−1.04	0.332	−0.38			(11)
		Success	0.012	0.356	0.03	0.974		0	79	32.8 (6)	0.95
		Success	0.012	0.356	0.03	0.974		1	268	480.5 (5)	0.95
		Δ arrival date	0.002	0.021	0.11	0.912

Distance and territory quality were transformed (log10 and square root, respectively) in order to approximate a normal distribution. The second section of the table (underlying relationships and data) presents the basic relationships that underlie the model: correlation coefficients (r) of territory quality in the preceding year and the distance a sedge warbler male shifts territory between seasons, as well as the distance differences between males without (0) or with (1) mating or nesting success

TWV tall wetland vegetation, sum of cattail and reed area in a male's territory

*−0.01 < p < 0.05, **−p = 0.005