Shallow seamounts represent speciation islands for circumglobal yellowtail Seriola lalandi

Abstract Phenotypic plasticity in life-history traits in response to heterogeneous environments has been observed in a number of fishes. Conversely, genetic structure has recently been detected in even the most wide ranging pelagic teleost fish and shark species with massive dispersal potential, put...

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Autores principales:	Sven Kerwath, Rouvay Roodt-Wilding, Toufiek Samaai, Henning Winker, Wendy West, Sheroma Surajnarayan, Belinda Swart, Aletta Bester-van der Merwe, Albrecht Götz, Stephen Lamberth, Christopher Wilke
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2237769d3a7c44b09062fc2bf29a4be2
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spelling	oai:doaj.org-article:2237769d3a7c44b09062fc2bf29a4be22021-12-02T13:30:28ZShallow seamounts represent speciation islands for circumglobal yellowtail Seriola lalandi10.1038/s41598-021-82501-z2045-2322https://doaj.org/article/2237769d3a7c44b09062fc2bf29a4be22021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-82501-zhttps://doaj.org/toc/2045-2322Abstract Phenotypic plasticity in life-history traits in response to heterogeneous environments has been observed in a number of fishes. Conversely, genetic structure has recently been detected in even the most wide ranging pelagic teleost fish and shark species with massive dispersal potential, putting into question previous expectations of panmixia. Shallow oceanic seamounts are known aggregation sites for pelagic species, but their role in genetic structuring of widely distributed species remains poorly understood. The yellowtail kingfish (Seriola lalandi), a commercially valuable, circumglobal, epipelagic fish species occurs in two genetically distinct Southern Hemisphere populations (South Pacific and southern Africa) with low levels of gene-flow between the regions. Two shallow oceanic seamounts exist in the ocean basins around southern Africa; Vema and Walters Shoal in the Atlantic and Indian oceans, respectively. We analysed rare samples from these remote locations and from the South African continental shelf to assess genetic structure and population connectivity in S. lalandi and investigated life-history traits by comparing diet, age, growth and maturation among the three sites. The results suggest that yellowtail from South Africa and the two seamounts are genetically and phenotypically distinct. Rather than mere feeding oases, we postulate that these seamounts represent islands of breeding populations with site-specific adaptations.Sven KerwathRouvay Roodt-WildingToufiek SamaaiHenning WinkerWendy WestSheroma SurajnarayanBelinda SwartAletta Bester-van der MerweAlbrecht GötzStephen LamberthChristopher WilkeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Sven Kerwath Rouvay Roodt-Wilding Toufiek Samaai Henning Winker Wendy West Sheroma Surajnarayan Belinda Swart Aletta Bester-van der Merwe Albrecht Götz Stephen Lamberth Christopher Wilke Shallow seamounts represent speciation islands for circumglobal yellowtail Seriola lalandi
description	Abstract Phenotypic plasticity in life-history traits in response to heterogeneous environments has been observed in a number of fishes. Conversely, genetic structure has recently been detected in even the most wide ranging pelagic teleost fish and shark species with massive dispersal potential, putting into question previous expectations of panmixia. Shallow oceanic seamounts are known aggregation sites for pelagic species, but their role in genetic structuring of widely distributed species remains poorly understood. The yellowtail kingfish (Seriola lalandi), a commercially valuable, circumglobal, epipelagic fish species occurs in two genetically distinct Southern Hemisphere populations (South Pacific and southern Africa) with low levels of gene-flow between the regions. Two shallow oceanic seamounts exist in the ocean basins around southern Africa; Vema and Walters Shoal in the Atlantic and Indian oceans, respectively. We analysed rare samples from these remote locations and from the South African continental shelf to assess genetic structure and population connectivity in S. lalandi and investigated life-history traits by comparing diet, age, growth and maturation among the three sites. The results suggest that yellowtail from South Africa and the two seamounts are genetically and phenotypically distinct. Rather than mere feeding oases, we postulate that these seamounts represent islands of breeding populations with site-specific adaptations.
format	article
author	Sven Kerwath Rouvay Roodt-Wilding Toufiek Samaai Henning Winker Wendy West Sheroma Surajnarayan Belinda Swart Aletta Bester-van der Merwe Albrecht Götz Stephen Lamberth Christopher Wilke
author_facet	Sven Kerwath Rouvay Roodt-Wilding Toufiek Samaai Henning Winker Wendy West Sheroma Surajnarayan Belinda Swart Aletta Bester-van der Merwe Albrecht Götz Stephen Lamberth Christopher Wilke
author_sort	Sven Kerwath
title	Shallow seamounts represent speciation islands for circumglobal yellowtail Seriola lalandi
title_short	Shallow seamounts represent speciation islands for circumglobal yellowtail Seriola lalandi
title_full	Shallow seamounts represent speciation islands for circumglobal yellowtail Seriola lalandi
title_fullStr	Shallow seamounts represent speciation islands for circumglobal yellowtail Seriola lalandi
title_full_unstemmed	Shallow seamounts represent speciation islands for circumglobal yellowtail Seriola lalandi
title_sort	shallow seamounts represent speciation islands for circumglobal yellowtail seriola lalandi
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/2237769d3a7c44b09062fc2bf29a4be2
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Shallow seamounts represent speciation islands for circumglobal yellowtail Seriola lalandi

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