Postzygotic Isolation Evolves before Prezygotic Isolation between Fresh and Saltwater Populations of the Rainwater Killifish, Lucania parva
Table 3
Analyses of L. parva survival in the presence or absence of methylene blue (MB) for hard water (KH8) and salt water (20 ppt). Results of generalized linear model for (a) 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). Statistically significant values are indicated in bold. Number of families per water treatment: without MB KH8 = 25, 20 ppt = 25, with MB KH8 = 32, 20 ppt = 32; total = 114. Number of eggs per water treatment: without MB KH8 = 224, 20 ppt = 326, with MB KH8 = 1255, 20 ppt = 1019. Number of fry per water treatment: without MB KH8 = 44, 20 ppt = 242, with MB KH8 = 1129, 20 ppt = 908.