sperm trait |
predictor |
slope |
t |
p |
λ |
r |
CL |
(a) Fringillidae (n=12) |
head |
testis mass |
−0.65 |
−2.03 |
0.07 |
<0.001*,n.s
|
−0.58 |
−0.83 to 0.07 |
|
body mass |
−0.21 |
−0.77 |
0.46 |
|
−0.26 |
−0.07 to 0.40 |
midpiece |
testis mass |
397.91 |
3.01 |
0.02 |
<0.001*,n.s
|
0.73 |
0.18 to 0.89 |
|
body mass |
−144.34 |
−1.30 |
0.23 |
|
−0.42 |
−0.76 to 0.27 |
flagellum |
testis mass |
365.38 |
3.06 |
0.01 |
<0.001*,n.s
|
0.73 |
0.19 to 0.89 |
|
body mass |
−144.96 |
−1.45 |
0.18 |
|
−0.46 |
0.78 to 0.23 |
total length |
testis mass |
355.98 |
3.04 |
0.01 |
<0.001*,n.s
|
0.73 |
0.19 to 0.89 |
|
body mass |
−148.35 |
−1.51 |
0.17 |
|
−0.47 |
−0.78 to 0.21 |
(b) Sylviidae (n=14) |
head |
testis mass |
0.03 |
1.17 |
0.27 |
<0.001n.s.,n.s
|
0.35 |
−0.06 to 0.79 |
|
body mass |
−0.24 |
−2.86 |
0.02 |
|
−0.67 |
−0.85 to −0.15 |
midpiece |
testis mass |
−0.10 |
−4.43 |
0.001 |
0.14n.s.,n.s
|
−0.81 |
−0.91 to −0.46 |
|
body mass |
−0.25 |
−3.94 |
0.002 |
|
−0.78 |
−0.90 to −0.38 |
flagellum |
testis mass |
−0.09 |
−3.69 |
0.004 |
0.69n.s.,n.s
|
−0.76 |
−0.89 to −0.33 |
|
body mass |
−0.21 |
−3.55 |
0.005 |
|
−0.75 |
−0.89 to −0.33 |
total length |
testis mass |
−0.07 |
−3.40 |
0.006 |
0.80n.s.,n.s
|
−0.73 |
−0.88 to −0.27 |
|
body mass |
−0.29 |
−4.12 |
0.002 |
|
−0.79 |
−0.91 to −0.41 |
(c) monogamous Sylviidae (n=7) |
head |
testis mass |
0.73 |
0.29 |
0.79 |
<0.001n.s.,n.s
|
0.17 |
−0.70 to 0.79 |
|
body mass |
−13.60 |
−3.26 |
0.03 |
|
−0.88 |
−0.97 to 0.02 |
midpiece |
testis mass |
−0.50 |
−3.69 |
0.02 |
<0.001n.s.,n.s
|
−0.91 |
−0.97 to −0.13 |
|
body mass |
−0.55 |
−2.49 |
0.07 |
|
−0.82 |
−0.95 to 0.18 |
flagellum |
testis mass |
−35.28 |
−3.09 |
0.04 |
<0.001n.s.,n.s
|
−0.87 |
−0.96 to 0.02 |
|
body mass |
−25.93 |
−1.40 |
0.23 |
|
−0.63 |
−0.90 to 0.47 |
total length |
testis mass |
−33.90 |
−3.31 |
0.03 |
<0.001n.s.,n.s
|
−0.89 |
−0.97 to −0.03 |
|
body mass |
−33.85 |
−2.04 |
0.11 |
|
−0.76 |
−0.93 to 0.30 |
(d) across passerine species (n=50) |
head |
testis mass |
0.04 |
2.21 |
0.03 |
0.37n.s, *
|
0.31 |
0.04 to 0.61 |
|
body mass |
−0.08 |
−3.82 |
<0.001 |
|
−0.49 |
−0.82 to −0.25 |
midpiece |
testis mass |
3.83 |
0.52 |
0.61 |
0.84n.s.,*
|
0.08 |
−0.21 to 0.37 |
|
body mass |
−17.68 |
−1.88 |
0.07 |
|
−0.27 |
−0.56 to 0.01 |
flagellum |
testis mass |
0.07 |
1.29 |
0.20 |
0.93n.s.,*
|
0.19 |
−0.09 to 0.48 |
|
body mass |
−0.20 |
−2.59 |
0.01 |
|
−0.26 |
−0.55 to 0.02 |
total length |
testis mass |
7.44 |
1.15 |
0.25 |
0.80n.s.,*
|
0.17 |
−0.11 to 0.46 |
|
body mass |
−17.56 |
−2.19 |
0.04 |
|
−0.31 |
−0.61 to −0.35 |