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Cryptic diversity within two widespread diadromous freshwater fishes (Teleostei: Galaxiidae).

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Title: Cryptic diversity within two widespread diadromous freshwater fishes (Teleostei: Galaxiidae).
Authors: Jense, Charlotte1 (AUTHOR) charlotte.jense@utas.edu.au, Adams, Mark2,3 (AUTHOR), Raadik, Tarmo A.4 (AUTHOR), Waters, Jonathan M.5 (AUTHOR), Morgan, David L.6 (AUTHOR), Barmuta, Leon A.1 (AUTHOR), Hardie, Scott A.1 (AUTHOR), Deagle, Bruce E.7 (AUTHOR), Burridge, Christopher P.1 (AUTHOR)
Source: Ecology & Evolution (20457758). May2024, Vol. 14 Issue 5, p1-16. 16p.
Subject Terms: *Biodiversity conservation, *Freshwater fishes, Osteichthyes, Mitochondrial DNA, Gene flow
Abstract: Identification 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. [ABSTRACT FROM AUTHOR]
Copyright of Ecology & Evolution (20457758) is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Cryptic diversity within two widespread diadromous freshwater fishes (Teleostei: Galaxiidae).
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  Data: <searchLink fieldCode="AR" term="%22Jense%2C+Charlotte%22">Jense, Charlotte</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> charlotte.jense@utas.edu.au</i><br /><searchLink fieldCode="AR" term="%22Adams%2C+Mark%22">Adams, Mark</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Raadik%2C+Tarmo+A%2E%22">Raadik, Tarmo A.</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Waters%2C+Jonathan+M%2E%22">Waters, Jonathan M.</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Morgan%2C+David+L%2E%22">Morgan, David L.</searchLink><relatesTo>6</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Barmuta%2C+Leon+A%2E%22">Barmuta, Leon A.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hardie%2C+Scott+A%2E%22">Hardie, Scott A.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Deagle%2C+Bruce+E%2E%22">Deagle, Bruce E.</searchLink><relatesTo>7</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Burridge%2C+Christopher+P%2E%22">Burridge, Christopher P.</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Ecology+%26+Evolution+%2820457758%29%22">Ecology & Evolution (20457758)</searchLink>. May2024, Vol. 14 Issue 5, p1-16. 16p.
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  Data: *<searchLink fieldCode="DE" term="%22Biodiversity+conservation%22">Biodiversity conservation</searchLink><br />*<searchLink fieldCode="DE" term="%22Freshwater+fishes%22">Freshwater fishes</searchLink><br /><searchLink fieldCode="DE" term="%22Osteichthyes%22">Osteichthyes</searchLink><br /><searchLink fieldCode="DE" term="%22Mitochondrial+DNA%22">Mitochondrial DNA</searchLink><br /><searchLink fieldCode="DE" term="%22Gene+flow%22">Gene flow</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Identification 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. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Ecology & Evolution (20457758) is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1002/ece3.11201
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        Text: English
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      – SubjectFull: Freshwater fishes
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      – SubjectFull: Osteichthyes
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      – SubjectFull: Mitochondrial DNA
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      – SubjectFull: Gene flow
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      – TitleFull: Cryptic diversity within two widespread diadromous freshwater fishes (Teleostei: Galaxiidae).
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              Text: May2024
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