Jense, Charlotte;
Adams, Mark;
Raadik, Tarmo A.;
Waters, Jonathan M.;
Morgan, David L.;
Barmuta, Leon A.;
Hardie, Scott A.;
Deagle, Bruce E.;
Burridge, Christopher P.
Cryptic diversity within two widespread diadromous freshwater fishes (Teleostei: Galaxiidae)
You can manage bookmarks using lists, please log in to your user account for this.
Media type:
E-Article
Title:
Cryptic diversity within two widespread diadromous freshwater fishes (Teleostei: Galaxiidae)
Contributor:
Jense, Charlotte;
Adams, Mark;
Raadik, Tarmo A.;
Waters, Jonathan M.;
Morgan, David L.;
Barmuta, Leon A.;
Hardie, Scott A.;
Deagle, Bruce E.;
Burridge, Christopher P.
Published:
Wiley, 2024
Published in:
Ecology and Evolution, 14 (2024) 5
Language:
English
DOI:
10.1002/ece3.11201
ISSN:
2045-7758
Origination:
Footnote:
Description:
AbstractIdentification of taxonomically cryptic species is essential for the effective conservation of biodiversity. Freshwater‐limited organisms tend to be genetically isolated by drainage boundaries, and thus may be expected to show substantial cryptic phylogenetic and taxonomic diversity. By comparison, populations of diadromous taxa, that migrate between freshwater and marine environments, are expected to show less genetic differentiation. Here we test for cryptic diversity in Australasian populations (both diadromous and non‐diadromous) of two widespread Southern Hemisphere fish species, Galaxias brevipinnis and Galaxias maculatus. Both mtDNA and nuclear markers reveal putative cryptic species within these taxa. The substantial diversity detected within G. brevipinnis may be explained by its strong climbing ability which allows it to form isolated inland populations. In island populations, G. brevipinnis similarly show deeper genetic divergence than those of G. maculatus, which may be explained by the greater abundance of G. maculatus larvae in the sea allowing more ongoing dispersal. Our study highlights that even widespread, ‘high‐dispersal’ species can harbour substantial cryptic diversity and therefore warrant increased taxonomic and conservation attention.