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Lost at sea: genetic, oceanographic and meteorological evidence for storm-forced dispersal

Lost at sea: genetic, oceanographic and meteorological evidence for storm-forced dispersal
Lost at sea: genetic, oceanographic and meteorological evidence for storm-forced dispersal
For many species, there is broad-scale dispersal of juvenile stages and/or long-distance migration of individuals and hence the processes that drive these various wide-ranging movements have important life-history consequences. Sea turtles are one of these paradigmatic long-distance travellers, with hatchlings thought to be dispersed by ocean currents and adults often shuttling between distant breeding and foraging grounds. Here, we use multi-disciplinary oceanographic, atmospheric and genetic mixed stock analyses to show that juvenile turtles are encountered ‘downstream’ at sites predicted by currents. However, in some cases, unusual occurrences of juveniles are more readily explained by storm events and we show that juvenile turtles may be displaced thousands of kilometres from their expected dispersal based on prevailing ocean currents. As such, storms may be a route by which unexpected areas are encountered by juveniles which may in turn shape adult migrations. Increased stormy weather predicted under climate change scenarios suggests an increasing role of storms in dispersal of sea turtles and other marine groups with life-stages near the ocean surface.
loggerhead sea turtles, mtDNA, Lagrangian buoy trajectories, particle tracking, storm tracks, mixed stock analysis
1725-1732
Monzon-Arguello, C.
6c617acd-3ab3-4ee7-ada5-77f3c11c3308
Dell'Amico, F.
4ac8d8e3-80e1-4ca0-a5d2-3a3330fb48dd
Moriniere, P.
0ac61e4f-e090-4f13-914a-5ad9e194208f
Marco, A.
43916c54-e626-4179-85e9-33a8df9901f4
Lopez-Jurado, L.F.
7e2c8702-bab3-45a9-97b9-d9dac594a2f8
Hays, G.C.
25b7d8f7-51b4-4350-b53c-996c4c9034ee
Scott, R.
96283dba-5cb5-4ab5-9bbe-e368b68ca406
Marsh, R.
702c2e7e-ac19-4019-abd9-a8614ab27717
Lee, P.L.M.
3157a9db-82f2-4c7e-b9ed-9519ced0a933
Monzon-Arguello, C.
6c617acd-3ab3-4ee7-ada5-77f3c11c3308
Dell'Amico, F.
4ac8d8e3-80e1-4ca0-a5d2-3a3330fb48dd
Moriniere, P.
0ac61e4f-e090-4f13-914a-5ad9e194208f
Marco, A.
43916c54-e626-4179-85e9-33a8df9901f4
Lopez-Jurado, L.F.
7e2c8702-bab3-45a9-97b9-d9dac594a2f8
Hays, G.C.
25b7d8f7-51b4-4350-b53c-996c4c9034ee
Scott, R.
96283dba-5cb5-4ab5-9bbe-e368b68ca406
Marsh, R.
702c2e7e-ac19-4019-abd9-a8614ab27717
Lee, P.L.M.
3157a9db-82f2-4c7e-b9ed-9519ced0a933

Monzon-Arguello, C., Dell'Amico, F., Moriniere, P., Marco, A., Lopez-Jurado, L.F., Hays, G.C., Scott, R., Marsh, R. and Lee, P.L.M. (2012) Lost at sea: genetic, oceanographic and meteorological evidence for storm-forced dispersal. Journal of the Royal Society Interface, 9 (73), 1725-1732. (doi:10.1098/rsif.2011.0788).

Record type: Article

Abstract

For many species, there is broad-scale dispersal of juvenile stages and/or long-distance migration of individuals and hence the processes that drive these various wide-ranging movements have important life-history consequences. Sea turtles are one of these paradigmatic long-distance travellers, with hatchlings thought to be dispersed by ocean currents and adults often shuttling between distant breeding and foraging grounds. Here, we use multi-disciplinary oceanographic, atmospheric and genetic mixed stock analyses to show that juvenile turtles are encountered ‘downstream’ at sites predicted by currents. However, in some cases, unusual occurrences of juveniles are more readily explained by storm events and we show that juvenile turtles may be displaced thousands of kilometres from their expected dispersal based on prevailing ocean currents. As such, storms may be a route by which unexpected areas are encountered by juveniles which may in turn shape adult migrations. Increased stormy weather predicted under climate change scenarios suggests an increasing role of storms in dispersal of sea turtles and other marine groups with life-stages near the ocean surface.

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More information

Published date: 7 August 2012
Keywords: loggerhead sea turtles, mtDNA, Lagrangian buoy trajectories, particle tracking, storm tracks, mixed stock analysis
Organisations: Physical Oceanography

Identifiers

Local EPrints ID: 341930
URI: https://eprints.soton.ac.uk/id/eprint/341930
PURE UUID: 8349079c-44b3-415e-a2bf-5bac165ad1b0

Catalogue record

Date deposited: 07 Aug 2012 12:33
Last modified: 06 Nov 2017 17:31

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