Table 1

Phenotypic variation among C. briggsae isolates

Character

Grand mean

SD

N

df

F

ρ


Early fecundity

31.99 surviving offspring

20.86

210

8

13.26***

-0.432**

Late fecundity

103.8 surviving offspring

58.03

210

8

14.93***

-0.482**

Total fecundity

135.7 surviving offspring

66.74

210

8

22.89***

-0.554***

Intrinsic rate of increase (r)

0.808

0.250

210

8

17.93***

-0.426***

Total lifespan

16.96 days

6.358

160

8

5.192***

-0.228***

Pharyngeal pumping

181.6 pumps/min

79.99

110

8

8.215***

-0.582***

ATP content

4.499 nM/mg protein

1.545

85

8

25.09***

-0.120

Paraquat resistance

61.03 min

21.70

127

8

7.139***

-0.204***

Superoxide level

224.20 relative fluorescence units

18.55

99

8

8.388***

0.119


Grand means, standard deviations, and sample sizes for all traits measured. F is the test statistic for one-way analyses of variance for each phenotype in C. briggsae isolates. ρ is the Pearson correlation coefficient between isolate-specific trait means and deletion frequencies. *, **, and *** denote significance at the 0.05, 0.01, and 0.001 levels, respectively.

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

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