Identifying Important Juvenile Dusky Shark Habitat in the Northwest Atlantic Ocean Using Acoustic Telemetry and Spatial Modeling

Abstract Highly mobile species can be challenging for fisheries management and conservation due to large home ranges combined with dependence on discrete habitat areas where they can be easily targeted or vulnerable to anthropogenic disturbances. Management of the Dusky Shark Carcharhinus obscurus i...

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Published in:Marine and Coastal Fisheries
Main Authors: Bangley, Charles W., Curtis, Tobey H., Secor, David H., Latour, Robert J., Ogburn, Matthew B.
Other Authors: Bureau of Ocean Energy Management
Format: Article in Journal/Newspaper
Language:English
Published: Wiley 2020
Subjects:
Online Access:http://dx.doi.org/10.1002/mcf2.10120
https://onlinelibrary.wiley.com/doi/pdf/10.1002/mcf2.10120
https://onlinelibrary.wiley.com/doi/full-xml/10.1002/mcf2.10120
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spelling crwiley:10.1002/mcf2.10120 2024-10-06T13:51:39+00:00 Identifying Important Juvenile Dusky Shark Habitat in the Northwest Atlantic Ocean Using Acoustic Telemetry and Spatial Modeling Bangley, Charles W. Curtis, Tobey H. Secor, David H. Latour, Robert J. Ogburn, Matthew B. Bureau of Ocean Energy Management 2020 http://dx.doi.org/10.1002/mcf2.10120 https://onlinelibrary.wiley.com/doi/pdf/10.1002/mcf2.10120 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/mcf2.10120 https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1002/mcf2.10120 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Marine and Coastal Fisheries volume 12, issue 5, page 348-363 ISSN 1942-5120 1942-5120 journal-article 2020 crwiley https://doi.org/10.1002/mcf2.10120 2024-09-11T04:17:44Z Abstract Highly mobile species can be challenging for fisheries management and conservation due to large home ranges combined with dependence on discrete habitat areas where they can be easily targeted or vulnerable to anthropogenic disturbances. Management of the Dusky Shark Carcharhinus obscurus in the northwest Atlantic Ocean has been particularly challenging due to the species’ inherent vulnerability to overfishing and poorly understood habitat associations. To better understand habitat associations and seasonal distributions, we combined telemetry and remotely sensed environmental data to spatially model juvenile Dusky Shark presence probability in the northwest Atlantic Ocean. To accomplish this, 22 juvenile Dusky Sharks (107–220 cm TL) that were tagged with acoustic transmitters at different locations within the U.S. Middle Atlantic Bight region were tracked through networked arrays of acoustic receivers. Tag detections were summarized as daily presence records, and data describing environmental conditions, including depth, chlorophyll‐ a concentration, salinity, and sea surface temperature, were extracted at detection locations. These data were used in boosted regression tree models to predict juvenile Dusky Shark presence probability based on environmental parameters during fall 2017 and summer 2018. Telemetry observations and modeled presence probability showed consistent associations with temperatures between 16°C and 26°C and chlorophyll‐ a concentrations between 2 and 7 mg/m 3 , which were associated with seasonal migration timing and monthly spatial distributions. Dusky Shark tag detections and predicted distributions during summer and early fall overlapped areas in the Middle Atlantic Bight that were affected by fisheries and potential offshore energy development. Our methodology provides a framework for assessing climate change effects on distribution. Article in Journal/Newspaper Northwest Atlantic Wiley Online Library Marine and Coastal Fisheries 12 5 348 363
institution Open Polar
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op_collection_id crwiley
language English
description Abstract Highly mobile species can be challenging for fisheries management and conservation due to large home ranges combined with dependence on discrete habitat areas where they can be easily targeted or vulnerable to anthropogenic disturbances. Management of the Dusky Shark Carcharhinus obscurus in the northwest Atlantic Ocean has been particularly challenging due to the species’ inherent vulnerability to overfishing and poorly understood habitat associations. To better understand habitat associations and seasonal distributions, we combined telemetry and remotely sensed environmental data to spatially model juvenile Dusky Shark presence probability in the northwest Atlantic Ocean. To accomplish this, 22 juvenile Dusky Sharks (107–220 cm TL) that were tagged with acoustic transmitters at different locations within the U.S. Middle Atlantic Bight region were tracked through networked arrays of acoustic receivers. Tag detections were summarized as daily presence records, and data describing environmental conditions, including depth, chlorophyll‐ a concentration, salinity, and sea surface temperature, were extracted at detection locations. These data were used in boosted regression tree models to predict juvenile Dusky Shark presence probability based on environmental parameters during fall 2017 and summer 2018. Telemetry observations and modeled presence probability showed consistent associations with temperatures between 16°C and 26°C and chlorophyll‐ a concentrations between 2 and 7 mg/m 3 , which were associated with seasonal migration timing and monthly spatial distributions. Dusky Shark tag detections and predicted distributions during summer and early fall overlapped areas in the Middle Atlantic Bight that were affected by fisheries and potential offshore energy development. Our methodology provides a framework for assessing climate change effects on distribution.
author2 Bureau of Ocean Energy Management
format Article in Journal/Newspaper
author Bangley, Charles W.
Curtis, Tobey H.
Secor, David H.
Latour, Robert J.
Ogburn, Matthew B.
spellingShingle Bangley, Charles W.
Curtis, Tobey H.
Secor, David H.
Latour, Robert J.
Ogburn, Matthew B.
Identifying Important Juvenile Dusky Shark Habitat in the Northwest Atlantic Ocean Using Acoustic Telemetry and Spatial Modeling
author_facet Bangley, Charles W.
Curtis, Tobey H.
Secor, David H.
Latour, Robert J.
Ogburn, Matthew B.
author_sort Bangley, Charles W.
title Identifying Important Juvenile Dusky Shark Habitat in the Northwest Atlantic Ocean Using Acoustic Telemetry and Spatial Modeling
title_short Identifying Important Juvenile Dusky Shark Habitat in the Northwest Atlantic Ocean Using Acoustic Telemetry and Spatial Modeling
title_full Identifying Important Juvenile Dusky Shark Habitat in the Northwest Atlantic Ocean Using Acoustic Telemetry and Spatial Modeling
title_fullStr Identifying Important Juvenile Dusky Shark Habitat in the Northwest Atlantic Ocean Using Acoustic Telemetry and Spatial Modeling
title_full_unstemmed Identifying Important Juvenile Dusky Shark Habitat in the Northwest Atlantic Ocean Using Acoustic Telemetry and Spatial Modeling
title_sort identifying important juvenile dusky shark habitat in the northwest atlantic ocean using acoustic telemetry and spatial modeling
publisher Wiley
publishDate 2020
url http://dx.doi.org/10.1002/mcf2.10120
https://onlinelibrary.wiley.com/doi/pdf/10.1002/mcf2.10120
https://onlinelibrary.wiley.com/doi/full-xml/10.1002/mcf2.10120
https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1002/mcf2.10120
genre Northwest Atlantic
genre_facet Northwest Atlantic
op_source Marine and Coastal Fisheries
volume 12, issue 5, page 348-363
ISSN 1942-5120 1942-5120
op_rights http://creativecommons.org/licenses/by/4.0/
op_doi https://doi.org/10.1002/mcf2.10120
container_title Marine and Coastal Fisheries
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