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Table 1 Summary of parameters for D. magna females: first and second samples

From: Assessment of parasite virulence in a natural population of a planktonic crustacean

 

First sample

(7. June 2015)

Second sample

(28. June 2015)

Total number of collected females

309

408

Females on sampling day (= day of capture)

 Percentage infected females on day of capture

4.8%

38.2%

 Number of females with eggs

  Uninfected

17

1

  Infected

0

0

 Average number of eggs in broodpouch

  Uninfected

0.383 (± 1.136)

0.027 (± 0.001)

  Infected

0 (± 0)

0 (± 0)

 Number of females with ephippia

  Uninfected

10

0

  Infected

0

0

 Average body length

  Uninfected

2.37 mm (± 0.65)

2.10 mm (± 0.41)

  Infected

3.26 mm (± 0.40)

3.21 mm (± 0.40)

Females at the end of the observation period

 Percentage infected at the end of observation period

40.1%

88.0%

 Number of days for infection to be recognized

13.7 (± 4.9)

10.1 (± 6.79)

 Number of clutches prior to parasitic castration

0.89 (± 0.8)

0.09 (± 0.4)

  1. Where appropriate, means ± standard deviations are given