Genetic diversity and demographic history of Dosidicus gigas (Cephalopoda: Ommastrephidae) in the Humboldt Current System

Christian M. Ibánez, Luis A. Cubillos, Ricardo Tafur, Juan Argüelles, Carmen Yamashiro, Elie Poulin

Resultado de la investigación: Article

30 Citas (Scopus)

Resumen

During the late Pleistocene-Holocene, the Humboldt Current System (HCS, Peru-Chile) was subject to important oceanographic variations that may have affected the abundance and distribution of marine populations, as well as their genetic structure and diversity. The fast growth and short life span of jumbo squid Dosidicus gigas make this squid a valuable model organism for evaluating how environmental fluctuations affect the genetic diversity of marine populations. We sequenced a 657 bp fragment of the mtDNA cytochrome c oxidase I (COI) gene of 169 jumbo squids from 6 locations in the HCS. We measured and compared genetic diversity among localities and performed neutrality tests to detect deviation from mutation-drift equilibrium. We inferred the demographic history of jumbo squids using Bayesian skyline analyses to estimate effective population size through time. A total of 23 haplotypes were found among the sequences. Haplotype and nucleotide diversity were low in all locations. D. gigas was characterized by an absence of population genetic structure and a star-like haplotype network. Neutrality test values were negative and statistically significant, and therefore consistent with a past population expansion. Similarly, Bayesian skyline analyses indicated a recent demographic expansion after the last glacial maximum. Our results suggest that D. gigas consists of a single, large population in the HCS, that may have experienced a dramatic demographic popu lation expansion consistent with the oceanographic changes associated with the last glacial- interglacial transition.

Idioma originalEnglish
Páginas (desde-hasta)163-171
Número de páginas9
PublicaciónMarine Ecology Progress Series
Volumen431
DOI
EstadoPublished - 9 jun 2011

Huella dactilar

Ommastrephidae
Dosidicus gigas
demographic history
Cephalopoda
demographic statistics
genetic variation
genetic structure
population genetics
Last Glacial-Interglacial
haplotypes
effective population size
Last Glacial Maximum
cytochrome
mutation
Holocene
Pleistocene
gene
squid
Peru
cytochrome-c oxidase

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Aquatic Science

Citar esto

Ibánez, Christian M. ; Cubillos, Luis A. ; Tafur, Ricardo ; Argüelles, Juan ; Yamashiro, Carmen ; Poulin, Elie. / Genetic diversity and demographic history of Dosidicus gigas (Cephalopoda : Ommastrephidae) in the Humboldt Current System. En: Marine Ecology Progress Series. 2011 ; Vol. 431. pp. 163-171.
@article{fc7ec31e6d49422f94d0425244dd7c31,
title = "Genetic diversity and demographic history of Dosidicus gigas (Cephalopoda: Ommastrephidae) in the Humboldt Current System",
abstract = "During the late Pleistocene-Holocene, the Humboldt Current System (HCS, Peru-Chile) was subject to important oceanographic variations that may have affected the abundance and distribution of marine populations, as well as their genetic structure and diversity. The fast growth and short life span of jumbo squid Dosidicus gigas make this squid a valuable model organism for evaluating how environmental fluctuations affect the genetic diversity of marine populations. We sequenced a 657 bp fragment of the mtDNA cytochrome c oxidase I (COI) gene of 169 jumbo squids from 6 locations in the HCS. We measured and compared genetic diversity among localities and performed neutrality tests to detect deviation from mutation-drift equilibrium. We inferred the demographic history of jumbo squids using Bayesian skyline analyses to estimate effective population size through time. A total of 23 haplotypes were found among the sequences. Haplotype and nucleotide diversity were low in all locations. D. gigas was characterized by an absence of population genetic structure and a star-like haplotype network. Neutrality test values were negative and statistically significant, and therefore consistent with a past population expansion. Similarly, Bayesian skyline analyses indicated a recent demographic expansion after the last glacial maximum. Our results suggest that D. gigas consists of a single, large population in the HCS, that may have experienced a dramatic demographic popu lation expansion consistent with the oceanographic changes associated with the last glacial- interglacial transition.",
keywords = "Coalescent, COI, Expansion, Jumbo squid, Population genetics",
author = "Ib{\'a}nez, {Christian M.} and Cubillos, {Luis A.} and Ricardo Tafur and Juan Arg{\"u}elles and Carmen Yamashiro and Elie Poulin",
year = "2011",
month = "6",
day = "9",
doi = "10.3354/meps09133",
language = "English",
volume = "431",
pages = "163--171",
journal = "Marine Ecology - Progress Series",
issn = "0171-8630",
publisher = "Inter-Research",

}

Genetic diversity and demographic history of Dosidicus gigas (Cephalopoda : Ommastrephidae) in the Humboldt Current System. / Ibánez, Christian M.; Cubillos, Luis A.; Tafur, Ricardo; Argüelles, Juan; Yamashiro, Carmen; Poulin, Elie.

En: Marine Ecology Progress Series, Vol. 431, 09.06.2011, p. 163-171.

Resultado de la investigación: Article

TY - JOUR

T1 - Genetic diversity and demographic history of Dosidicus gigas (Cephalopoda

T2 - Ommastrephidae) in the Humboldt Current System

AU - Ibánez, Christian M.

AU - Cubillos, Luis A.

AU - Tafur, Ricardo

AU - Argüelles, Juan

AU - Yamashiro, Carmen

AU - Poulin, Elie

PY - 2011/6/9

Y1 - 2011/6/9

N2 - During the late Pleistocene-Holocene, the Humboldt Current System (HCS, Peru-Chile) was subject to important oceanographic variations that may have affected the abundance and distribution of marine populations, as well as their genetic structure and diversity. The fast growth and short life span of jumbo squid Dosidicus gigas make this squid a valuable model organism for evaluating how environmental fluctuations affect the genetic diversity of marine populations. We sequenced a 657 bp fragment of the mtDNA cytochrome c oxidase I (COI) gene of 169 jumbo squids from 6 locations in the HCS. We measured and compared genetic diversity among localities and performed neutrality tests to detect deviation from mutation-drift equilibrium. We inferred the demographic history of jumbo squids using Bayesian skyline analyses to estimate effective population size through time. A total of 23 haplotypes were found among the sequences. Haplotype and nucleotide diversity were low in all locations. D. gigas was characterized by an absence of population genetic structure and a star-like haplotype network. Neutrality test values were negative and statistically significant, and therefore consistent with a past population expansion. Similarly, Bayesian skyline analyses indicated a recent demographic expansion after the last glacial maximum. Our results suggest that D. gigas consists of a single, large population in the HCS, that may have experienced a dramatic demographic popu lation expansion consistent with the oceanographic changes associated with the last glacial- interglacial transition.

AB - During the late Pleistocene-Holocene, the Humboldt Current System (HCS, Peru-Chile) was subject to important oceanographic variations that may have affected the abundance and distribution of marine populations, as well as their genetic structure and diversity. The fast growth and short life span of jumbo squid Dosidicus gigas make this squid a valuable model organism for evaluating how environmental fluctuations affect the genetic diversity of marine populations. We sequenced a 657 bp fragment of the mtDNA cytochrome c oxidase I (COI) gene of 169 jumbo squids from 6 locations in the HCS. We measured and compared genetic diversity among localities and performed neutrality tests to detect deviation from mutation-drift equilibrium. We inferred the demographic history of jumbo squids using Bayesian skyline analyses to estimate effective population size through time. A total of 23 haplotypes were found among the sequences. Haplotype and nucleotide diversity were low in all locations. D. gigas was characterized by an absence of population genetic structure and a star-like haplotype network. Neutrality test values were negative and statistically significant, and therefore consistent with a past population expansion. Similarly, Bayesian skyline analyses indicated a recent demographic expansion after the last glacial maximum. Our results suggest that D. gigas consists of a single, large population in the HCS, that may have experienced a dramatic demographic popu lation expansion consistent with the oceanographic changes associated with the last glacial- interglacial transition.

KW - Coalescent

KW - COI

KW - Expansion

KW - Jumbo squid

KW - Population genetics

UR - http://www.scopus.com/inward/record.url?scp=79958279162&partnerID=8YFLogxK

U2 - 10.3354/meps09133

DO - 10.3354/meps09133

M3 - Article

AN - SCOPUS:79958279162

VL - 431

SP - 163

EP - 171

JO - Marine Ecology - Progress Series

JF - Marine Ecology - Progress Series

SN - 0171-8630

ER -