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2015 ; 10
(10
): e0141101
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Ocean Heat Content Reveals Secrets of Fish Migrations
#MMPMID26484541
Luo J
; Ault JS
; Shay LK
; Hoolihan JP
; Prince ED
; Brown CA
; Rooker JR
PLoS One
2015[]; 10
(10
): e0141101
PMID26484541
show ga
For centuries, the mechanisms surrounding spatially complex animal migrations
have intrigued scientists and the public. We present a new methodology using
ocean heat content (OHC), a habitat metric that is normally a fundamental part of
hurricane intensity forecasting, to estimate movements and migration of
satellite-tagged marine fishes. Previous satellite-tagging research of fishes
using archival depth, temperature and light data for geolocations have been too
coarse to resolve detailed ocean habitat utilization. We combined tag data with
OHC estimated from ocean circulation and transport models in an optimization
framework that substantially improved geolocation accuracy over SST-based tracks.
The OHC-based movement track provided the first quantitative evidence that many
of the tagged highly migratory fishes displayed affinities for ocean fronts and
eddies. The OHC method provides a new quantitative tool for studying dynamic use
of ocean habitats, migration processes and responses to environmental changes by
fishes, and further, improves ocean animal tracking and extends satellite-based
animal tracking data for other potential physical, ecological, and fisheries
applications.