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Abstract(s)
Marine species exhibiting wide distributional ranges are frequently subdivided into discrete genetic
units over limited spatial scales. This is often due to specifc life-history traits or oceanographic barriers
that prevent gene fow. Fine-scale sampling studies revealed distinct phylogeographic patterns in
the northeastern Atlantic and the Mediterranean, ranging from panmixia to noticeable population
genetic structure. Here, we used mitochondrial sequence data to analyse connectivity in the bogue
Boops boops throughout most of its widespread distribution. Our results identifed the existence of
three clades, one comprising specimens from the Azores and eastern Atlantic/Mediterranean, another
with individuals from the Canary Islands, Madeira and Cape Verde archipelagos, and the third with
samples from Mauritania only. One of the branches of the northern subtropical gyre (Azores Current)
that drifts towards the Gulf of Cádiz promotes a closer connection between the Azores, southern
Portugal and the Mediterranean B. boops populations. The Almería-Oran Front, widely recognised as
an oceanographic barrier for many organisms to cross the Atlantic-Mediterranean divide, does not
seem to afect the dispersal of this benthopelagic species. The southward movement of the Cape Verde
Frontal Zone during the winter, combined with the relatively short duration of the pelagic larval stage
of B. boops, may be potential factors for preventing the connectivity between the Atlantic oceanic
archipelagos and Mauritania shaping the genetic signature of this species.
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Citation
Cunha, R. L., Faleh, A. B., Francisco, S., Šanda, R., Vukić, J., Corona, L., Dia, M., Glavičić, I., Kassar, A., Castilho, R., & Robalo, J. I. (2022). Three mitochondrial lineages and no Atlantic-Mediterranean barrier for the bogue Boops boops across its widespread distribution. Scientific Reports, 12(1), 1–9. https://doi.org/10.1038/s41598-022-26651-8
Publisher
Nature Publishing Group