Endemic and widespread coral reef fishes have similar mitochondrial genetic diversity

Erwan Delrieu-Trottin 1, 2 Jeffrey Maynard 3, 1, 2 Serge Planes 2, 1
1 LabEX CORAIL - Laboratoire d'Excellence CORAIL
2 CRIOBE - Centre de recherches insulaires et observatoire de l'environnement
3 Department of Ecology & Evolutionary Biology
Abstract : Endemic species are frequently assumed to have lower genetic diversity than species with large distributions, even if closely related. This assumption is based on research from the terrestrial environment and theoretical evolutionary modelling. We test this assumption in the marine environment by analysing the mitochondrial genetic diversity of 33 coral reef fish species from five families sampled from Pacific Ocean archipelagos. Surprisingly, haplotype and nucleotide diversity did not differ significantly between endemic and widespread species. The probable explanation is that the effective population size of some widespread fishes locally is similar to that of many of the endemics. Connectivity across parts of the distribution of the widespread species is probably low, so widespread species can operate like endemics at the extreme or isolated parts of their range. Mitochondrial genetic diversity of many endemic reef fish species may not either limit range size or be a source of vulnerability.
Keywords : endemism coral reef fish mitochondrial genetic diversity range size vulnerability
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Submitted on : Friday, June 17, 2016 - 11:34:47 AM
Last modification on : Wednesday, November 20, 2019 - 7:10:55 AM

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Erwan Delrieu-Trottin, Jeffrey Maynard, Serge Planes. Endemic and widespread coral reef fishes have similar mitochondrial genetic diversity. Proceedings of the Royal Society B: Biological Sciences, Royal Society, The, 2014, 281 (1797), ⟨10.1098/rspb.2014.1068 ⟩. ⟨hal-01333327⟩

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