DataSheet_1_Trophic-Mediated Pelagic Habitat Structuring and Partitioning by Sympatric Elasmobranchs.pdf
Pelagic elasmobranchs are key elements of oceanic ecosystems and must be preserved if marine trophic networks are to be kept in balance. Yet, they face intense fishing pressure that has been threatening their populations worldwide. Ensuring proper conservation management of these taxa depends on a b...
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ftfrontimediafig:oai:figshare.com:article/20088986 2023-05-15T18:21:16+02:00 DataSheet_1_Trophic-Mediated Pelagic Habitat Structuring and Partitioning by Sympatric Elasmobranchs.pdf André S. Afonso Bruno C. L. Macena Bruno Mourato Natalia P. A. Bezerra Sibele Mendonça Joyce D. G. R. de Queiroz Fábio H. V. Hazin 2022-06-17T12:20:29Z https://doi.org/10.3389/fmars.2022.779047.s001 https://figshare.com/articles/dataset/DataSheet_1_Trophic-Mediated_Pelagic_Habitat_Structuring_and_Partitioning_by_Sympatric_Elasmobranchs_pdf/20088986 unknown doi:10.3389/fmars.2022.779047.s001 https://figshare.com/articles/dataset/DataSheet_1_Trophic-Mediated_Pelagic_Habitat_Structuring_and_Partitioning_by_Sympatric_Elasmobranchs_pdf/20088986 CC BY 4.0 CC-BY Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering diving behavior foraging strategy telemetry marine predators mesopelagic shark ray Dataset 2022 ftfrontimediafig https://doi.org/10.3389/fmars.2022.779047.s001 2022-06-22T23:07:46Z Pelagic elasmobranchs are key elements of oceanic ecosystems and must be preserved if marine trophic networks are to be kept in balance. Yet, they face intense fishing pressure that has been threatening their populations worldwide. Ensuring proper conservation management of these taxa depends on a better understanding of the strategies they use to explore the pelagic realm and their contributions to trophic web structuring across the ocean column. This study aimed at examining relationships between vertical habitat use and trophic attributes among six sympatric pelagic elasmobranchs using satellite transmitting tags in the western equatorial South Atlantic Ocean. The vertical movements of 35 elasmobranch individuals were tracked during an overall total of 1911 days. Clear relationships between species’ feeding habits, maximum diving depths, and proportion of time spent either in epipelagic or in surface waters were evidenced by Bayesian generalized linear mixed models and multivariate analysis. Filter-feeders made most use of deep waters from the mesopelagic and bathypelagic and shifted their diving depths in phase with diel vertical migrations of the deep scattering layer, i.e., shallower during the night and deeper during the day. Specialists exhibited distinct diving patterns in epipelagic and mesopelagic waters across the diel period which are potentially indicative of habitat partitioning, whereas generalists were more surface-oriented but also explored deeper waters compared to specialists. The trophic level also seemed to influence elasmobranch maximum diving depths, which tended to become shallower as species’ trophic level increased. These results corroborate previous evidence of widespread vertical habitat partitioning among sympatric pelagic predators and depict a trophic-mediated structuring of the pelagic environment where top-down control may be exerted at different depths by distinct species. Further research is yet required to understand the role of elasmobranch vertical movements in structuring ... Dataset South Atlantic Ocean Frontiers: Figshare |
institution |
Open Polar |
collection |
Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering diving behavior foraging strategy telemetry marine predators mesopelagic shark ray |
spellingShingle |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering diving behavior foraging strategy telemetry marine predators mesopelagic shark ray André S. Afonso Bruno C. L. Macena Bruno Mourato Natalia P. A. Bezerra Sibele Mendonça Joyce D. G. R. de Queiroz Fábio H. V. Hazin DataSheet_1_Trophic-Mediated Pelagic Habitat Structuring and Partitioning by Sympatric Elasmobranchs.pdf |
topic_facet |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering diving behavior foraging strategy telemetry marine predators mesopelagic shark ray |
description |
Pelagic elasmobranchs are key elements of oceanic ecosystems and must be preserved if marine trophic networks are to be kept in balance. Yet, they face intense fishing pressure that has been threatening their populations worldwide. Ensuring proper conservation management of these taxa depends on a better understanding of the strategies they use to explore the pelagic realm and their contributions to trophic web structuring across the ocean column. This study aimed at examining relationships between vertical habitat use and trophic attributes among six sympatric pelagic elasmobranchs using satellite transmitting tags in the western equatorial South Atlantic Ocean. The vertical movements of 35 elasmobranch individuals were tracked during an overall total of 1911 days. Clear relationships between species’ feeding habits, maximum diving depths, and proportion of time spent either in epipelagic or in surface waters were evidenced by Bayesian generalized linear mixed models and multivariate analysis. Filter-feeders made most use of deep waters from the mesopelagic and bathypelagic and shifted their diving depths in phase with diel vertical migrations of the deep scattering layer, i.e., shallower during the night and deeper during the day. Specialists exhibited distinct diving patterns in epipelagic and mesopelagic waters across the diel period which are potentially indicative of habitat partitioning, whereas generalists were more surface-oriented but also explored deeper waters compared to specialists. The trophic level also seemed to influence elasmobranch maximum diving depths, which tended to become shallower as species’ trophic level increased. These results corroborate previous evidence of widespread vertical habitat partitioning among sympatric pelagic predators and depict a trophic-mediated structuring of the pelagic environment where top-down control may be exerted at different depths by distinct species. Further research is yet required to understand the role of elasmobranch vertical movements in structuring ... |
format |
Dataset |
author |
André S. Afonso Bruno C. L. Macena Bruno Mourato Natalia P. A. Bezerra Sibele Mendonça Joyce D. G. R. de Queiroz Fábio H. V. Hazin |
author_facet |
André S. Afonso Bruno C. L. Macena Bruno Mourato Natalia P. A. Bezerra Sibele Mendonça Joyce D. G. R. de Queiroz Fábio H. V. Hazin |
author_sort |
André S. Afonso |
title |
DataSheet_1_Trophic-Mediated Pelagic Habitat Structuring and Partitioning by Sympatric Elasmobranchs.pdf |
title_short |
DataSheet_1_Trophic-Mediated Pelagic Habitat Structuring and Partitioning by Sympatric Elasmobranchs.pdf |
title_full |
DataSheet_1_Trophic-Mediated Pelagic Habitat Structuring and Partitioning by Sympatric Elasmobranchs.pdf |
title_fullStr |
DataSheet_1_Trophic-Mediated Pelagic Habitat Structuring and Partitioning by Sympatric Elasmobranchs.pdf |
title_full_unstemmed |
DataSheet_1_Trophic-Mediated Pelagic Habitat Structuring and Partitioning by Sympatric Elasmobranchs.pdf |
title_sort |
datasheet_1_trophic-mediated pelagic habitat structuring and partitioning by sympatric elasmobranchs.pdf |
publishDate |
2022 |
url |
https://doi.org/10.3389/fmars.2022.779047.s001 https://figshare.com/articles/dataset/DataSheet_1_Trophic-Mediated_Pelagic_Habitat_Structuring_and_Partitioning_by_Sympatric_Elasmobranchs_pdf/20088986 |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_relation |
doi:10.3389/fmars.2022.779047.s001 https://figshare.com/articles/dataset/DataSheet_1_Trophic-Mediated_Pelagic_Habitat_Structuring_and_Partitioning_by_Sympatric_Elasmobranchs_pdf/20088986 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fmars.2022.779047.s001 |
_version_ |
1766200448009633792 |