Skip to main content

Table 2 Components of reproductive isolation (RIi) and absolute (ACn) and relative (RCn) contributions to total reproductive isolation for the reproductive barriers (RIB) between Daphnia pulex and Daphnia pulicaria examined in this study. Components of reproductive isolation values are calculated based on modifications of [20], with C representing intrapopulation conspecific crosses, and vary from 0 (complete gene flow) to 1 (complete isolation). Components of reproductive isolation values are shown for D. pulex x D. pulicaria (px x pc), reciprocal D. pulicaria x D. pulex (pc x px), and the mean. Absolute and relative contributions are calculated based on [4], and in brackets showing total contributions of prezygotic and postzygotic isolating barriers. Total reproductive isolation is based on the sum of the absolute contributions of RIB. 95% confidence intervals are indicated in brackets

From: The evolution of reproductive isolation in Daphnia

Reproductive barriers

Components of reproductive isolation (RIi)

Absolute contribution (ACn)

Relative contribution (RCn)

Mean

px x pc

pc x px

Mean

Mean

Habitat

0.979 (± 0.029)

–

–

0.979

0.983

Temporal

0.313 (± 2.139)

–

–

0.007

0.007

Mating-Fertilization

0.134 (± 0.073)

0.192 (± 0.110)

0.060 (± 0.087)

0.002

0.002

Total Prezygotic

(0.988)

(0.992)

F1 Zygotic Mortality

0.134 (± 0.084)

0.137 (± 0.110)

0.132 (± 0.136)

0.002

0.002

F1 Hatching

0.366 (± 0.176)

0.296 (± 0.246)

0.446 (± 0.263)

0.004

0.004

F1 Survivorship

0.266 (± 0.147)

0.343 (± 0.224)

0.159 (± 0.183)

0.002

0.002

Total Postzygotic

(0.008)

(0.008)

Total Isolation

0.996

1.000