Postzygotic Isolation Evolves before Prezygotic Isolation between Fresh and Saltwater Populations of the Rainwater Killifish, Lucania parva
Figure 2
L. parva survival differences in fresh and salt water. Mean survival probabilities (+ standard error) for Pecos River (white bars), Indian River (black bars), and Indian-Pecos hybrid crosses (gray bars) across different water chemistries: reverse osmosis water (RO), soft water (KH3), hard water (KH8), saline (20 ppt), and hypersaline (40 ppt). All crosses were raised in the absence of methylene blue. Arrows indicate mean survival probability of zero. (a) The proportion of eggs hatched, (b) proportion of fry that survived to 14 days after hatch, (c) total survival (proportion of eggs that survived to 14 days after hatch).
