Spatial genetic structure and demographic inference of the Patagonian squid Doryteuthis gahi in the south-eastern Pacific Ocean
Author
dc.contributor.author
Ibáñez, Christian M.
Author
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Argüelles, Juan
Author
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Yamashiro, Carmen
Author
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Adasme, Luis
Author
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Céspedes, Renato
Author
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Poulin, Elie
Admission date
dc.date.accessioned
2018-12-20T14:13:12Z
Available date
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2018-12-20T14:13:12Z
Publication date
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2012
Cita de ítem
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Journal of the Marine Biological Association of the United Kingdom, Volumen 92, Issue 1, 2018, Pages 197-203
Identifier
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00253154
Identifier
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14697769
Identifier
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10.1017/S0025315411000440
Identifier
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https://repositorio.uchile.cl/handle/2250/154900
Abstract
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Doryteuthis gahi is a small squid species that has a wide distribution in South America. This species is characterized by coastal and benthic spawning, and its ontogenetic vertical migration is associated with upwelling zones, features that may restrict its dispersal potential. It has also been proposed that populations of these neritic squid are structured by the influence of local processes which act as barriers to gene flow. Based on this background, we evaluate the geographical structure of genetic diversity in D. gahi along its distribution in the south-eastern Pacific Ocean. We used 116 COI mtDNA sequences of squid collected from different sites in Peru and Chile and calculated genetic diversity, the population structure index Fst, and performed analysis of spatial molecular variance and exact tests to detect differences among localities. To infer demographic history we carried out tests of neutrality and Bayesian skyline analysis. Although there was little molecular divergence b