Spatio-temporal patterns of genetic variation of the silverside Odontesthes regia in the highly productive Humboldt Current System

Diego Deville; Gustavo Sanchez; Sergio P. Barahona; Carmen Yamashiro; Daniel Oré-Chávez; Roger Quiroz Bazán; Tetsuya Umino

doi:10.1016/j.fishres.2021.106127

Spatio-temporal patterns of genetic variation of the silverside Odontesthes regia in the highly productive Humboldt Current System

Diego Deville, Gustavo Sanchez, Sergio P. Barahona, Carmen Yamashiro, Daniel Oré-Chávez, Roger Quiroz Bazán, Tetsuya Umino

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

The Humboldt Current System (HCS) is characterised by latitudinal upwelling differences and interannual El Niño events that bring equatorial warm waters into the system. Within the HCS, the silverside Odontesthes regia is a coastal fish that faces intense harvesting, and physical and oceanographic variability. Here, we evaluated how different processes in the HCS have shaped the spatial and temporal genetic variation of O. regia populations by using 650-bp alignment of the mitochondrial control region and nine microsatellite loci. We found that both DNA markers indicated high genetic diversity, presence of at least two co-distributed genetic groups, and a slight genetic structure shaped by a biogeographic break within the HCS rather than the latitudinal upwelling differences or geographical distances. Demographic history of these groups suggests an allopatric origin and posterior reconnection as the result of historical changes in the HCS. No genetic interannual divergences were found in subsystems with intermittent presence of warm waters, suggesting no significant influence of El Niño on the genetic variation of O. regia from 2013 to 2018. Despite the inherent disturbances of the HCS, past and recent estimates of effective population sizes showed high values in most populations. Our results provide essential information for the management of O. regia in the HCS. Our study also helps to understand how the spatio-temporal dynamics of the HCS influences the genetic variation of coastal marine fishes.

Original language	English
Article number	106127
Journal	Fisheries Research
Volume	244
DOIs	https://doi.org/10.1016/j.fishres.2021.106127
State	Published - Dec 2021

Bibliographical note

Funding Information:
D. Deville , G . Sanchez , S . Barahona , and D . Oré-Chávez conceived of the initial idea. D . Deville , G . Sanchez , S . Barahona , D . Oré-Chávez , and T . Umino designed the methodology. D . Deville collected samples, carried out experiments and performed statistical analyses. D . Deville , G . Sanchez , S . Barahona , R . Quiroz Bazán , D . Oré-Chávez and T . Umino verified the statistical analyses and supervised the experiments. C . Yamashiro , R . Quiroz Bazán , and D . Oré-Chávez encouraged D . Deville to investigate the spatial genetic variation along the upwelling subsystems and supervised the findings of this work. G . Sanchez , D . Oré-Chávez , and T . Umino encouraged D . Deville to investigate the temporal genetic variation between years in the Humboldt Current System. C . Yamashiro organised personnel for sampling over years. R . Quiroz Bazán , D . Oré-Chávez and Tetsuya Umino provided reagents, equipment, and facilities for experiments. D . Deville wrote the manuscript with support of G . Sanchez and S . Barahona . C . Yamashiro , R . Quiroz Bazán , D . Oré-Chávez and T. Umino reviewed the draft of the manuscript. All authors contributed to the presentation of the work. R . Quiroz Bazán , Ore-Chavez , and T . Umino were responsible of management and coordination for the research activity and execution, and of the financial support for the project leading to this publication.

Publisher Copyright:
© 2021 Elsevier B.V.

Keywords

Biogeographic break
El Niño
Humboldt Current System
Population genetics
Silverside
Spatio-temporal patterns

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10.1016/j.fishres.2021.106127

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title = "Spatio-temporal patterns of genetic variation of the silverside Odontesthes regia in the highly productive Humboldt Current System",

abstract = "The Humboldt Current System (HCS) is characterised by latitudinal upwelling differences and interannual El Ni{\~n}o events that bring equatorial warm waters into the system. Within the HCS, the silverside Odontesthes regia is a coastal fish that faces intense harvesting, and physical and oceanographic variability. Here, we evaluated how different processes in the HCS have shaped the spatial and temporal genetic variation of O. regia populations by using 650-bp alignment of the mitochondrial control region and nine microsatellite loci. We found that both DNA markers indicated high genetic diversity, presence of at least two co-distributed genetic groups, and a slight genetic structure shaped by a biogeographic break within the HCS rather than the latitudinal upwelling differences or geographical distances. Demographic history of these groups suggests an allopatric origin and posterior reconnection as the result of historical changes in the HCS. No genetic interannual divergences were found in subsystems with intermittent presence of warm waters, suggesting no significant influence of El Ni{\~n}o on the genetic variation of O. regia from 2013 to 2018. Despite the inherent disturbances of the HCS, past and recent estimates of effective population sizes showed high values in most populations. Our results provide essential information for the management of O. regia in the HCS. Our study also helps to understand how the spatio-temporal dynamics of the HCS influences the genetic variation of coastal marine fishes.",

keywords = "Biogeographic break, El Ni{\~n}o, Humboldt Current System, Population genetics, Silverside, Spatio-temporal patterns",

author = "Diego Deville and Gustavo Sanchez and Barahona, {Sergio P.} and Carmen Yamashiro and Daniel Or{\'e}-Ch{\'a}vez and Baz{\'a}n, {Roger Quiroz} and Tetsuya Umino",

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AU - Deville, Diego

AU - Sanchez, Gustavo

AU - Barahona, Sergio P.

AU - Yamashiro, Carmen

AU - Oré-Chávez, Daniel

AU - Bazán, Roger Quiroz

AU - Umino, Tetsuya

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N2 - The Humboldt Current System (HCS) is characterised by latitudinal upwelling differences and interannual El Niño events that bring equatorial warm waters into the system. Within the HCS, the silverside Odontesthes regia is a coastal fish that faces intense harvesting, and physical and oceanographic variability. Here, we evaluated how different processes in the HCS have shaped the spatial and temporal genetic variation of O. regia populations by using 650-bp alignment of the mitochondrial control region and nine microsatellite loci. We found that both DNA markers indicated high genetic diversity, presence of at least two co-distributed genetic groups, and a slight genetic structure shaped by a biogeographic break within the HCS rather than the latitudinal upwelling differences or geographical distances. Demographic history of these groups suggests an allopatric origin and posterior reconnection as the result of historical changes in the HCS. No genetic interannual divergences were found in subsystems with intermittent presence of warm waters, suggesting no significant influence of El Niño on the genetic variation of O. regia from 2013 to 2018. Despite the inherent disturbances of the HCS, past and recent estimates of effective population sizes showed high values in most populations. Our results provide essential information for the management of O. regia in the HCS. Our study also helps to understand how the spatio-temporal dynamics of the HCS influences the genetic variation of coastal marine fishes.

AB - The Humboldt Current System (HCS) is characterised by latitudinal upwelling differences and interannual El Niño events that bring equatorial warm waters into the system. Within the HCS, the silverside Odontesthes regia is a coastal fish that faces intense harvesting, and physical and oceanographic variability. Here, we evaluated how different processes in the HCS have shaped the spatial and temporal genetic variation of O. regia populations by using 650-bp alignment of the mitochondrial control region and nine microsatellite loci. We found that both DNA markers indicated high genetic diversity, presence of at least two co-distributed genetic groups, and a slight genetic structure shaped by a biogeographic break within the HCS rather than the latitudinal upwelling differences or geographical distances. Demographic history of these groups suggests an allopatric origin and posterior reconnection as the result of historical changes in the HCS. No genetic interannual divergences were found in subsystems with intermittent presence of warm waters, suggesting no significant influence of El Niño on the genetic variation of O. regia from 2013 to 2018. Despite the inherent disturbances of the HCS, past and recent estimates of effective population sizes showed high values in most populations. Our results provide essential information for the management of O. regia in the HCS. Our study also helps to understand how the spatio-temporal dynamics of the HCS influences the genetic variation of coastal marine fishes.

KW - Biogeographic break

KW - El Niño

KW - Humboldt Current System

KW - Population genetics

KW - Silverside

KW - Spatio-temporal patterns

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VL - 244

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M1 - 106127

ER -

Spatio-temporal patterns of genetic variation of the silverside Odontesthes regia in the highly productive Humboldt Current System

Abstract

Bibliographical note

Keywords

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