Genetic hypervariability of a Northeastern Atlantic venomous rockfish

Understanding the interplay between climate and current and historical factors shaping genetic diversity is pivotal to infer changes in marine species range and communities' composition. A phylogeographical break between the Atlantic and the Mediterranean has been documented for several marine...

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Bibliographic Details
Published in:PeerJ (San Francisco, CA) CA), 2021-07, Vol.9, p.e11730-e11730, Article e11730
Main Authors: Francisco, Sara M, Castilho, Rita, Lima, Cristina S, Almada, Frederico, Rodrigues, Francisca, Šanda, Radek, Vukić, Jasna, Pappalardo, Anna Maria, Ferrito, Venera, Robalo, Joana I
Format: Article
Language:English
Subjects:
Aquaculture, Fisheries and Fish Science
Atlantic-Mediterranean transition
Biogeography
Climate change
Climate effects
Connectivity
Dispersal
Evolutionary Studies
Genetic diversity
Genetic structure
Geographical distribution
Haplotypes
Marine Biology
Marine organisms
Mitochondria
Phylogeography
Population
Population Biology
Population structure
Range expansion
Salinity
Scorpaena maderensis
Scorpaenidae
Species
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Summary:Understanding the interplay between climate and current and historical factors shaping genetic diversity is pivotal to infer changes in marine species range and communities' composition. A phylogeographical break between the Atlantic and the Mediterranean has been documented for several marine organisms, translating into limited dispersal between the two basins. In this study, we screened the intraspecific diversity of 150 individuals of the Madeira rockfish ( ) across its distributional range (seven sampling locations in the Atlantic and Mediterranean basins) using the mitochondrial control region and the nuclear S7 first intron. The present work is the most comprehensive study done for this species, yielding no genetic structure across sampled locations and no detectable Atlantic-Mediterranean break in connectivity. Our results reveal deep and hyper-diverse bush-like genealogies with large numbers of singletons and very few shared haplotypes. The genetic hyper-diversity found for the Madeira rockfish is relatively uncommon in rocky coastal species, whose dispersal capability is limited by local oceanographic patterns. The effect of climate warming on the distribution of the species is discussed.
ISSN:2167-8359
2167-8359
DOI:10.7717/peerj.11730