Table 2

Female fitness traits across nuptial gift mating treatments, PG (protein gift), FG (fly gift), WG (worthless gift) and NG (no gift), data are presented as means and standard error.

PG

FG

WG

NG

Statistics

P

DF


% Egg hatching success

0.66 ± 0.10 a

(nes = 12)

0.50 ± 0.15 a

(nes = 11)

0.48 ± 0.13 a

(nes = 8)

0.33 ± 0.33 b

(nes = 3)

χ2yates = 91.4

<0.0001

3

Clutch-size

45.5 ± 4.5 a

(nes = 12)

38.0 ± 4.7 a

(nes = 11)

43.8 ± 5.5 a

(nes = 8)

27.3 ± 9.0 a

(nes = 3)

F = 1.30

0.29

3

Number of spiderlings per egg-sac

31.7 ± 6.1 a

(nes = 12)

18.2 ± 6.5 a

(nes = 11)

23.7 ± 7.6 a

(nes = 8)

6.3 ± 12.3 a

(nes = 3)

F = 1.45

0.24

3

Size of spiderlings (mm+SE)

0.649 ± 0.003 a

(nsp = 211;

nes = 12)

0.672 ± 0.004 b

(nsp = 107;

nes = 7)

0.674 ± 0.004 b

(nsp = 103;

nes = 7)

n/a

χ2overall = 86.92

χ2group= 56.11

χ2clutch-size = 52.49

χ2group*clutch-size= 27.56

<0.0001

<0.0001

<0.0001

<0.0001

5

2

1

2


nsp = spiderlings sample size; nes= egg-sac sample size.

Spiderling size was analyzed with GLM with clutch size as covariate. Groups with the same letter were not significantly different (p > 0.05).

Albo et al. BMC Evolutionary Biology 2011 11:329   doi:10.1186/1471-2148-11-329

Open Data