First Satellite Tracks Of South Atlantic Sea Turtle ‘Lost Years’: Seasonal Variation In Trans-Equatorial Movement
In the South Atlantic Ocean, few data exist regarding the dispersal of young oceanic sea turtles. We characterized the movements of laboratory-reared yearling loggerhead turtles from Brazilian rookeries using novel telemetry techniques, testing for differences in dispersal during different periods o...
Main Authors: | , , , , |
---|---|
Format: | Text |
Language: | unknown |
Published: |
STARS
2017
|
Subjects: | |
Online Access: | https://stars.library.ucf.edu/scopus2015/4863 |
id |
ftunicentralflor:oai:stars.library.ucf.edu:scopus2015-5862 |
---|---|
record_format |
openpolar |
spelling |
ftunicentralflor:oai:stars.library.ucf.edu:scopus2015-5862 2023-05-15T18:20:56+02:00 First Satellite Tracks Of South Atlantic Sea Turtle ‘Lost Years’: Seasonal Variation In Trans-Equatorial Movement Mansfield, Katherine L. Mendilaharsu, Milagros L. Putman, Nathan F. Dei Marcovaldi, Maria A.G. Sacco, Alexander E. 2017-12-06T08:00:00Z https://stars.library.ucf.edu/scopus2015/4863 unknown STARS https://stars.library.ucf.edu/scopus2015/4863 Scopus Export 2015-2019 Caretta caretta Dispersal Marine turtle oceanic stage Ocean currents Population connectivity South Atlantic Ocean text 2017 ftunicentralflor 2022-10-31T18:41:29Z In the South Atlantic Ocean, few data exist regarding the dispersal of young oceanic sea turtles. We characterized the movements of laboratory-reared yearling loggerhead turtles from Brazilian rookeries using novel telemetry techniques, testing for differences in dispersal during different periods of the sea turtle hatching season that correspond to seasonal changes in ocean currents. Oceanographic drifters deployed alongside satellite-tagged turtles allowed us to explore the mechanisms of dispersal (passive drift or active swimming). Early in the hatching season turtles transited south with strong southward currents. Late in the hatching season, when currents flowed in the opposite direction, turtles uniformly moved northwards across the Equator. However, the movement of individuals differed from what was predicted by surface currents alone. Swimming velocity inferred from track data and an ocean circulation model strongly suggest that turtles’ swimming plays a role in maintaining their position within frontal zones seaward of the continental shelf. The long nesting season of adults and behaviour of posthatchlings exposes young turtles to seasonally varying ocean conditions that lead some individuals further into the South Atlantic and others into the Northern Hemisphere. Such migratory route diversity may ultimately buffer the population against environmental changes or anthropologic threats, fostering population resiliency. Text South Atlantic Ocean University of Central Florida (UCF): STARS (Showcase of Text, Archives, Research & Scholarship) |
institution |
Open Polar |
collection |
University of Central Florida (UCF): STARS (Showcase of Text, Archives, Research & Scholarship) |
op_collection_id |
ftunicentralflor |
language |
unknown |
topic |
Caretta caretta Dispersal Marine turtle oceanic stage Ocean currents Population connectivity South Atlantic Ocean |
spellingShingle |
Caretta caretta Dispersal Marine turtle oceanic stage Ocean currents Population connectivity South Atlantic Ocean Mansfield, Katherine L. Mendilaharsu, Milagros L. Putman, Nathan F. Dei Marcovaldi, Maria A.G. Sacco, Alexander E. First Satellite Tracks Of South Atlantic Sea Turtle ‘Lost Years’: Seasonal Variation In Trans-Equatorial Movement |
topic_facet |
Caretta caretta Dispersal Marine turtle oceanic stage Ocean currents Population connectivity South Atlantic Ocean |
description |
In the South Atlantic Ocean, few data exist regarding the dispersal of young oceanic sea turtles. We characterized the movements of laboratory-reared yearling loggerhead turtles from Brazilian rookeries using novel telemetry techniques, testing for differences in dispersal during different periods of the sea turtle hatching season that correspond to seasonal changes in ocean currents. Oceanographic drifters deployed alongside satellite-tagged turtles allowed us to explore the mechanisms of dispersal (passive drift or active swimming). Early in the hatching season turtles transited south with strong southward currents. Late in the hatching season, when currents flowed in the opposite direction, turtles uniformly moved northwards across the Equator. However, the movement of individuals differed from what was predicted by surface currents alone. Swimming velocity inferred from track data and an ocean circulation model strongly suggest that turtles’ swimming plays a role in maintaining their position within frontal zones seaward of the continental shelf. The long nesting season of adults and behaviour of posthatchlings exposes young turtles to seasonally varying ocean conditions that lead some individuals further into the South Atlantic and others into the Northern Hemisphere. Such migratory route diversity may ultimately buffer the population against environmental changes or anthropologic threats, fostering population resiliency. |
format |
Text |
author |
Mansfield, Katherine L. Mendilaharsu, Milagros L. Putman, Nathan F. Dei Marcovaldi, Maria A.G. Sacco, Alexander E. |
author_facet |
Mansfield, Katherine L. Mendilaharsu, Milagros L. Putman, Nathan F. Dei Marcovaldi, Maria A.G. Sacco, Alexander E. |
author_sort |
Mansfield, Katherine L. |
title |
First Satellite Tracks Of South Atlantic Sea Turtle ‘Lost Years’: Seasonal Variation In Trans-Equatorial Movement |
title_short |
First Satellite Tracks Of South Atlantic Sea Turtle ‘Lost Years’: Seasonal Variation In Trans-Equatorial Movement |
title_full |
First Satellite Tracks Of South Atlantic Sea Turtle ‘Lost Years’: Seasonal Variation In Trans-Equatorial Movement |
title_fullStr |
First Satellite Tracks Of South Atlantic Sea Turtle ‘Lost Years’: Seasonal Variation In Trans-Equatorial Movement |
title_full_unstemmed |
First Satellite Tracks Of South Atlantic Sea Turtle ‘Lost Years’: Seasonal Variation In Trans-Equatorial Movement |
title_sort |
first satellite tracks of south atlantic sea turtle ‘lost years’: seasonal variation in trans-equatorial movement |
publisher |
STARS |
publishDate |
2017 |
url |
https://stars.library.ucf.edu/scopus2015/4863 |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_source |
Scopus Export 2015-2019 |
op_relation |
https://stars.library.ucf.edu/scopus2015/4863 |
_version_ |
1766199865177538560 |