Water column structure influences long-distance latitudinal migration patterns and habitat use of bumphead sunfish Mola alexandrini in the Pacific Ocean

Abstract Satellite-tracking of adult bumphead sunfish, Mola alexandrini, revealed long-distance latitudinal migration patterns covering thousands of kilometers. Horizontal and vertical movements of four bumphead sunfish off Taiwan were recorded with pop-up satellite archival tags in 2019–2020. Two i...

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Autores principales: Ching-Tsun Chang, Wei-Chuan Chiang, Michael K. Musyl, Brian N. Popp, Chi Hin Lam, Shian-Jhong Lin, Yuuki Y. Watanabe, Yuan-Hsing Ho, June-Ru Chen
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Publicado: Nature Portfolio 2021
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Acceso en línea:https://doaj.org/article/b593d1e64884447caad6ad616fba714a
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spelling oai:doaj.org-article:b593d1e64884447caad6ad616fba714a2021-11-14T12:22:25ZWater column structure influences long-distance latitudinal migration patterns and habitat use of bumphead sunfish Mola alexandrini in the Pacific Ocean10.1038/s41598-021-01110-y2045-2322https://doaj.org/article/b593d1e64884447caad6ad616fba714a2021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-01110-yhttps://doaj.org/toc/2045-2322Abstract Satellite-tracking of adult bumphead sunfish, Mola alexandrini, revealed long-distance latitudinal migration patterns covering thousands of kilometers. Horizontal and vertical movements of four bumphead sunfish off Taiwan were recorded with pop-up satellite archival tags in 2019–2020. Two individuals moved northward and traveled to Okinawa Island and Kyushu, Japan and two moved southwards; crossing the equator, to Papua New Guinea and New Caledonia. During daytime, bumphead sunfish descended below the thermocline and ascended to mixed layer depths (MLD) during nighttime. The N–S migrants, however, demonstrated different habitat utilization patterns. Instead of using prevailing currents, the northward movements of sunfish cohorts exhibited extensive use of mesoscale eddies. Fish in anticyclonic eddies usually occupied deeper habitats whereas those in cyclonic eddies used near-surface habitats. On northward excursions, fish spent most of their time in regions with high dissolved oxygen concentrations. Southward movement patterns were associated with major currents and thermal stratification of the water column. In highly stratified regions, fish stayed below the thermocline and frequently ascended to MLD during daytime either to warm muscles or repay oxygen debts. These results for bumphead sunfish present important insights into different habitat use patterns and the ability to undergo long-distance migrations over varying spatial-temporal scales and features.Ching-Tsun ChangWei-Chuan ChiangMichael K. MusylBrian N. PoppChi Hin LamShian-Jhong LinYuuki Y. WatanabeYuan-Hsing HoJune-Ru ChenNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Ching-Tsun Chang
Wei-Chuan Chiang
Michael K. Musyl
Brian N. Popp
Chi Hin Lam
Shian-Jhong Lin
Yuuki Y. Watanabe
Yuan-Hsing Ho
June-Ru Chen
Water column structure influences long-distance latitudinal migration patterns and habitat use of bumphead sunfish Mola alexandrini in the Pacific Ocean
description Abstract Satellite-tracking of adult bumphead sunfish, Mola alexandrini, revealed long-distance latitudinal migration patterns covering thousands of kilometers. Horizontal and vertical movements of four bumphead sunfish off Taiwan were recorded with pop-up satellite archival tags in 2019–2020. Two individuals moved northward and traveled to Okinawa Island and Kyushu, Japan and two moved southwards; crossing the equator, to Papua New Guinea and New Caledonia. During daytime, bumphead sunfish descended below the thermocline and ascended to mixed layer depths (MLD) during nighttime. The N–S migrants, however, demonstrated different habitat utilization patterns. Instead of using prevailing currents, the northward movements of sunfish cohorts exhibited extensive use of mesoscale eddies. Fish in anticyclonic eddies usually occupied deeper habitats whereas those in cyclonic eddies used near-surface habitats. On northward excursions, fish spent most of their time in regions with high dissolved oxygen concentrations. Southward movement patterns were associated with major currents and thermal stratification of the water column. In highly stratified regions, fish stayed below the thermocline and frequently ascended to MLD during daytime either to warm muscles or repay oxygen debts. These results for bumphead sunfish present important insights into different habitat use patterns and the ability to undergo long-distance migrations over varying spatial-temporal scales and features.
format article
author Ching-Tsun Chang
Wei-Chuan Chiang
Michael K. Musyl
Brian N. Popp
Chi Hin Lam
Shian-Jhong Lin
Yuuki Y. Watanabe
Yuan-Hsing Ho
June-Ru Chen
author_facet Ching-Tsun Chang
Wei-Chuan Chiang
Michael K. Musyl
Brian N. Popp
Chi Hin Lam
Shian-Jhong Lin
Yuuki Y. Watanabe
Yuan-Hsing Ho
June-Ru Chen
author_sort Ching-Tsun Chang
title Water column structure influences long-distance latitudinal migration patterns and habitat use of bumphead sunfish Mola alexandrini in the Pacific Ocean
title_short Water column structure influences long-distance latitudinal migration patterns and habitat use of bumphead sunfish Mola alexandrini in the Pacific Ocean
title_full Water column structure influences long-distance latitudinal migration patterns and habitat use of bumphead sunfish Mola alexandrini in the Pacific Ocean
title_fullStr Water column structure influences long-distance latitudinal migration patterns and habitat use of bumphead sunfish Mola alexandrini in the Pacific Ocean
title_full_unstemmed Water column structure influences long-distance latitudinal migration patterns and habitat use of bumphead sunfish Mola alexandrini in the Pacific Ocean
title_sort water column structure influences long-distance latitudinal migration patterns and habitat use of bumphead sunfish mola alexandrini in the pacific ocean
publisher Nature Portfolio
publishDate 2021
url https://doaj.org/article/b593d1e64884447caad6ad616fba714a
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