First tracking of the oceanic spawning migrations of Australasian short-finned eels (Anguilla australis)

Abstract Anguillid eel populations have declined dramatically over the last 50 years in many regions of the world, and numerous species are now under threat. A critical life-history phase is migration from freshwater to distant oceans, culminating in a single life-time spawning event. For many angui...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Wayne M. Koster, Kim Aarestrup, Kim Birnie-Gauvin, Ben Church, David Dawson, Jarod Lyon, Justin O’Connor, David Righton, Denis Rose, Håkan Westerberg, Ivor Stuart
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/1d827cd724044680bf643fcf6722f1c8
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:1d827cd724044680bf643fcf6722f1c8
record_format	dspace
spelling	oai:doaj.org-article:1d827cd724044680bf643fcf6722f1c82021-11-28T12:19:15ZFirst tracking of the oceanic spawning migrations of Australasian short-finned eels (Anguilla australis)10.1038/s41598-021-02325-92045-2322https://doaj.org/article/1d827cd724044680bf643fcf6722f1c82021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-02325-9https://doaj.org/toc/2045-2322Abstract Anguillid eel populations have declined dramatically over the last 50 years in many regions of the world, and numerous species are now under threat. A critical life-history phase is migration from freshwater to distant oceans, culminating in a single life-time spawning event. For many anguillids, especially those in the southern hemisphere, mystery still shrouds their oceanic spawning migrations. We investigated the oceanic spawning migrations of the Australasian short-finned eel (Anguilla australis) using pop-up satellite archival tags. Eels were collected from river estuaries (38° S, 142° E) in south-eastern temperate Australia. In 2019, 16 eels were tracked for up to about 5 months, ~ 2620 km from release, and as far north as the tropical Coral Sea (22° S, 155° E) off the north-east coast of Australia. Eels from southern Australia appeared to access deep water off the Australian coast via two main routes: (i) directly east via Bass Strait, or (ii) south-east around Tasmania, which is the shortest route to deep water. Tagged eels exhibited strong diel vertical migrations, alternating between the warm euphotic zone (~ 100–300 m, 15–20 °C) at night and the mesopelagic zone (~ 700–900 m, 6–8 °C) during the day. Marine predators, probably lamnid sharks, tuna, or marine mammals, ended many eel migrations (at least ~ 30%), largely before the eels had left the Australian continental shelf. The long and risky marine migrations of Australasian eels highlight the need for better information on the processes contributing to eel mortality throughout the life cycle, including the impacts of future changes to oceanic currents, predator abundance and direct anthropogenic disturbances.Wayne M. KosterKim AarestrupKim Birnie-GauvinBen ChurchDavid DawsonJarod LyonJustin O’ConnorDavid RightonDenis RoseHåkan WesterbergIvor StuartNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Wayne M. Koster Kim Aarestrup Kim Birnie-Gauvin Ben Church David Dawson Jarod Lyon Justin O’Connor David Righton Denis Rose Håkan Westerberg Ivor Stuart First tracking of the oceanic spawning migrations of Australasian short-finned eels (Anguilla australis)
description	Abstract Anguillid eel populations have declined dramatically over the last 50 years in many regions of the world, and numerous species are now under threat. A critical life-history phase is migration from freshwater to distant oceans, culminating in a single life-time spawning event. For many anguillids, especially those in the southern hemisphere, mystery still shrouds their oceanic spawning migrations. We investigated the oceanic spawning migrations of the Australasian short-finned eel (Anguilla australis) using pop-up satellite archival tags. Eels were collected from river estuaries (38° S, 142° E) in south-eastern temperate Australia. In 2019, 16 eels were tracked for up to about 5 months, ~ 2620 km from release, and as far north as the tropical Coral Sea (22° S, 155° E) off the north-east coast of Australia. Eels from southern Australia appeared to access deep water off the Australian coast via two main routes: (i) directly east via Bass Strait, or (ii) south-east around Tasmania, which is the shortest route to deep water. Tagged eels exhibited strong diel vertical migrations, alternating between the warm euphotic zone (~ 100–300 m, 15–20 °C) at night and the mesopelagic zone (~ 700–900 m, 6–8 °C) during the day. Marine predators, probably lamnid sharks, tuna, or marine mammals, ended many eel migrations (at least ~ 30%), largely before the eels had left the Australian continental shelf. The long and risky marine migrations of Australasian eels highlight the need for better information on the processes contributing to eel mortality throughout the life cycle, including the impacts of future changes to oceanic currents, predator abundance and direct anthropogenic disturbances.
format	article
author	Wayne M. Koster Kim Aarestrup Kim Birnie-Gauvin Ben Church David Dawson Jarod Lyon Justin O’Connor David Righton Denis Rose Håkan Westerberg Ivor Stuart
author_facet	Wayne M. Koster Kim Aarestrup Kim Birnie-Gauvin Ben Church David Dawson Jarod Lyon Justin O’Connor David Righton Denis Rose Håkan Westerberg Ivor Stuart
author_sort	Wayne M. Koster
title	First tracking of the oceanic spawning migrations of Australasian short-finned eels (Anguilla australis)
title_short	First tracking of the oceanic spawning migrations of Australasian short-finned eels (Anguilla australis)
title_full	First tracking of the oceanic spawning migrations of Australasian short-finned eels (Anguilla australis)
title_fullStr	First tracking of the oceanic spawning migrations of Australasian short-finned eels (Anguilla australis)
title_full_unstemmed	First tracking of the oceanic spawning migrations of Australasian short-finned eels (Anguilla australis)
title_sort	first tracking of the oceanic spawning migrations of australasian short-finned eels (anguilla australis)
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/1d827cd724044680bf643fcf6722f1c8
work_keys_str_mv	AT waynemkoster firsttrackingoftheoceanicspawningmigrationsofaustralasianshortfinnedeelsanguillaaustralis AT kimaarestrup firsttrackingoftheoceanicspawningmigrationsofaustralasianshortfinnedeelsanguillaaustralis AT kimbirniegauvin firsttrackingoftheoceanicspawningmigrationsofaustralasianshortfinnedeelsanguillaaustralis AT benchurch firsttrackingoftheoceanicspawningmigrationsofaustralasianshortfinnedeelsanguillaaustralis AT daviddawson firsttrackingoftheoceanicspawningmigrationsofaustralasianshortfinnedeelsanguillaaustralis AT jarodlyon firsttrackingoftheoceanicspawningmigrationsofaustralasianshortfinnedeelsanguillaaustralis AT justinoconnor firsttrackingoftheoceanicspawningmigrationsofaustralasianshortfinnedeelsanguillaaustralis AT davidrighton firsttrackingoftheoceanicspawningmigrationsofaustralasianshortfinnedeelsanguillaaustralis AT denisrose firsttrackingoftheoceanicspawningmigrationsofaustralasianshortfinnedeelsanguillaaustralis AT hakanwesterberg firsttrackingoftheoceanicspawningmigrationsofaustralasianshortfinnedeelsanguillaaustralis AT ivorstuart firsttrackingoftheoceanicspawningmigrationsofaustralasianshortfinnedeelsanguillaaustralis
_version_	1718408062218272768

First tracking of the oceanic spawning migrations of Australasian short-finned eels (Anguilla australis)

Ejemplares similares