Seasonal Movements, Aggregations and Diving Behavior of Atlantic Bluefin Tuna (Thunnus thynnus) Revealed with Archival Tags
Electronic tags were used to examine the seasonal movements, aggregations and diving behaviors of Atlantic bluefin tuna (Thunnus thynnus) to better understand their migration ecology and oceanic habitat utilization. Implantable archival tags (n = 561) were deployed in bluefin tuna from 1996 to 2005...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.520.3136 2023-05-15T17:30:36+02:00 Seasonal Movements, Aggregations and Diving Behavior of Atlantic Bluefin Tuna (Thunnus thynnus) Revealed with Archival Tags Andreas Walli Steven L. H. Teo Andre Boustany Charles J. Farwell Tom Williams Heidi Dewar Eric Prince Barbara A. Block The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.520.3136 http://www.tagagiant.org/media/Wallietal09.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.520.3136 http://www.tagagiant.org/media/Wallietal09.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.tagagiant.org/media/Wallietal09.pdf text ftciteseerx 2016-01-08T10:05:49Z Electronic tags were used to examine the seasonal movements, aggregations and diving behaviors of Atlantic bluefin tuna (Thunnus thynnus) to better understand their migration ecology and oceanic habitat utilization. Implantable archival tags (n = 561) were deployed in bluefin tuna from 1996 to 2005 and 106 tags were recovered. Movement paths of the fish were reconstructed using light level and sea-surface-temperature-based geolocation estimates. To quantify habitat utilization we employed a weighted kernel estimation technique that removed the biases of deployment location and track length. Throughout the North Atlantic, high residence times (167633 days) were identified in four spatially confined regions on a seasonal scale. Within each region, bluefin tuna experienced distinct temperature regimes and displayed different diving behaviors. The mean diving depths within the high-use areas were significantly shallower and the dive frequency and the variance in internal temperature significantly higher than during transit movements between the high-use areas. Residence time in the more northern latitude high-use areas was significantly correlated with levels of primary productivity. The regions of aggregation are associated with areas of abundant prey and potentially represent critical foraging habitats that have seasonally abundant prey. Throughout the North Atlantic mean diving depth was significantly correlated with the Text North Atlantic Unknown |
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English |
description |
Electronic tags were used to examine the seasonal movements, aggregations and diving behaviors of Atlantic bluefin tuna (Thunnus thynnus) to better understand their migration ecology and oceanic habitat utilization. Implantable archival tags (n = 561) were deployed in bluefin tuna from 1996 to 2005 and 106 tags were recovered. Movement paths of the fish were reconstructed using light level and sea-surface-temperature-based geolocation estimates. To quantify habitat utilization we employed a weighted kernel estimation technique that removed the biases of deployment location and track length. Throughout the North Atlantic, high residence times (167633 days) were identified in four spatially confined regions on a seasonal scale. Within each region, bluefin tuna experienced distinct temperature regimes and displayed different diving behaviors. The mean diving depths within the high-use areas were significantly shallower and the dive frequency and the variance in internal temperature significantly higher than during transit movements between the high-use areas. Residence time in the more northern latitude high-use areas was significantly correlated with levels of primary productivity. The regions of aggregation are associated with areas of abundant prey and potentially represent critical foraging habitats that have seasonally abundant prey. Throughout the North Atlantic mean diving depth was significantly correlated with the |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Andreas Walli Steven L. H. Teo Andre Boustany Charles J. Farwell Tom Williams Heidi Dewar Eric Prince Barbara A. Block |
spellingShingle |
Andreas Walli Steven L. H. Teo Andre Boustany Charles J. Farwell Tom Williams Heidi Dewar Eric Prince Barbara A. Block Seasonal Movements, Aggregations and Diving Behavior of Atlantic Bluefin Tuna (Thunnus thynnus) Revealed with Archival Tags |
author_facet |
Andreas Walli Steven L. H. Teo Andre Boustany Charles J. Farwell Tom Williams Heidi Dewar Eric Prince Barbara A. Block |
author_sort |
Andreas Walli |
title |
Seasonal Movements, Aggregations and Diving Behavior of Atlantic Bluefin Tuna (Thunnus thynnus) Revealed with Archival Tags |
title_short |
Seasonal Movements, Aggregations and Diving Behavior of Atlantic Bluefin Tuna (Thunnus thynnus) Revealed with Archival Tags |
title_full |
Seasonal Movements, Aggregations and Diving Behavior of Atlantic Bluefin Tuna (Thunnus thynnus) Revealed with Archival Tags |
title_fullStr |
Seasonal Movements, Aggregations and Diving Behavior of Atlantic Bluefin Tuna (Thunnus thynnus) Revealed with Archival Tags |
title_full_unstemmed |
Seasonal Movements, Aggregations and Diving Behavior of Atlantic Bluefin Tuna (Thunnus thynnus) Revealed with Archival Tags |
title_sort |
seasonal movements, aggregations and diving behavior of atlantic bluefin tuna (thunnus thynnus) revealed with archival tags |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.520.3136 http://www.tagagiant.org/media/Wallietal09.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
http://www.tagagiant.org/media/Wallietal09.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.520.3136 http://www.tagagiant.org/media/Wallietal09.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766127451236204544 |