Postzygotic Isolation Evolves before Prezygotic Isolation between Fresh and Saltwater Populations of the Rainwater Killifish, Lucania parva
Figure 4
L. parva and L. goodei survival differences in fresh water. Mean survival probabilities (+ standard error) for Pecos River (white bars), Indian River (black bars), Indian-Pecos hybrids (gray bars), and L. goodei (hatched bars) crosses in soft (KH3) and hard fresh water (KH8). 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).
