Landscape edges shape dispersal and population structure of a migratory fish
MA Kaemingk, SE Swearer, SJ Bury, JS Shima
OECOLOGIA | SPRINGER | Published : 2019
Many freshwater organisms have a life-history stage that can disperse through seawater. This has obvious benefits for colonization and connectivity of fragmented sub-populations, but requires a physiologically challenging migration across a salinity boundary. We consider the role of landscape boundaries between freshwater and seawater habitats, and evaluate their potential effects on traits and developmental histories of larvae and juveniles (i.e., dispersing life-history stages) of an amphidromous fish, Galaxias maculatus. We sampled juvenile fish on their return to 20 rivers in New Zealand: 10 rivers had abrupt transitions to the sea (i.e., emptying to an open coastline); these were paired..View full abstract
Awarded by National Science Foundation
We acknowledge funding from the National Science Foundation (DBI 1306226) and Victoria University of Wellington; logistic support from Victoria University Coastal Ecology Laboratory; and research assistance from J. Bottcher, C. McDowall, C. Neilson, V. Wood, T. Bates, B. Focht, D. McNaughton, B. Moginie, D. Crossett, B. Focht, A. Kaemingk, A. Kilimnik and J. Brown. We thank C. Chizinski for statistical advice and three anonymous reviewers for improving this manuscript.