Life-history and hormonal control of aggression in black redstarts: Blocking testosterone does not decrease territorial aggression, but changes the emphasis of vocal behaviours during simulated territorial intrusions

Apfelbeck, Beate; Mortega, Kim G; Kiefer, Sarah; Kipper, Silke; Goymann, Wolfgang

doi:10.1186/1742-9994-10-8

Frontiers in Zoology

Table 2 Linear mixed model results for the effects of treatment (placebo- or Flut/Let-implanted) and day (3 or 10) after implantation on vocal behaviours

From: Life-history and hormonal control of aggression in black redstarts: Blocking testosterone does not decrease territorial aggression, but changes the emphasis of vocal behaviours during simulated territorial intrusions

	During STI		After STI
Song duration
Treatment	F_1,16 = 0.07	p = 0.8	F_1,18 = 2.8	p = 0.1
Day of STI	F_1,12 = 0.2	p = 0.7	F_1,17 = 0.3	p = 0.6
Treatment*day	F _1,12 = 8.4	p = 0.01
Duration pause A - B
Treatment	F_1,16 = 0.4	p = 0.6	F_1,18 = 1.5	p = 0.2
Day of STI	F _1,13 = 5.2	p = 0.04	F _1,13 = 5.8	p = 0.03
Treatment*day	F_1,13 = 3.8	p = 0.07
Elements in A
Duration A	F _1,12 =17.8	p = 0.001	F_1,12 = 0.2	p = 0.7
Treatment	F_1,16 = 0.1	p = 0.8	F_1,18 = 0.2	p = 0.7
Day of STI	F_1,12 = 4.2	p = 0.06	F _1,12 = 6.7	p = 0.02
Duration A*treatment	F_1,12 = 1.6	p = 0.2	F_1,12 = 4.0	p = 0.07
Duration A*day			F_1,12= 0.4	p = 0.5
Treatment*day			F_1,12 = 0.4	p = 0.5
Duration Atreatmentday			F _1,12 = 4.7	p = 0.05
Frequency bandwidth A
Duration A	F_1,12 = 2.5	p = 0.1	F _1,16 = 0.09	p = 0.8
Treatment	F_1,16 = 1.0	p = 0.3	F _1,18 = 5.2	p = 0.04
Day of STI	F_1,12 = 0.004	p = 1.0	F _1,16 = 4.4	p = 0.05
Duration A*treatment	F_1,12 = 3.4	p = 0.09
Frequency bandwidth B
Duration B	F_1,6 = 0.07	p = 0.8	F_1,15 = 3.1	0.1
Treatment	F_1,15 = 0.02	p = 0.9	F _1,18 = 6.2	p = 0.02
Day of STI	F _1,6 = 13.7	p = 0.01	F_1,15 = 4.2	p = 0.06
Duration B*treatment	F _1,6 = 56.1	p = 0.0003
Duration B*day	F _1,6 = 23.5	p = 0.003
Treatment*day	F _1,6 = 31.3	p = 0.001
Duration Btreatmentday	F_1,6 = 4.6	p = 0.07
Elements in C
Duration C	F _1,11 = 13.7	p = 0.004	F _1,15 = 8.1	0.01
Treatment	F_1,16 = 0.3	p = 0.6	F_1,18 = 0.005	p = 1.0
Day of STI	F_1,11 = 1.2	p = 0.3	F _1,15 = 6.3	p = 0.02
Frequency bandwidth C
Duration C	F_1,11 = 1.3	p = 0.3	F_1,15 = 0.3	p = 0.6
Treatment	F_1,16 = 0.5	p = 0.5	F_1,18 = 0.07	p = 0.8
Day of STI	F_1,11 = 0.01	p = 1.0	F_1,15 = 0.8	p = 0.4

To control for repeated measures the ID of each territory owner was included as random intercept. Significant results are highlighted in bold.

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ISSN: 1742-9994

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