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Published in: Biodiversity and Conservation 1/2023

05-11-2022 | Original Paper

Novel insights into coastal site affinity and habitat connectivity of a benthic stingray with implications for management

Authors: Chantel Elston, Paul D. Cowley, Taryn S. Murray, Matthew C. Parkinson

Published in: Biodiversity and Conservation | Issue 1/2023

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Abstract

The blue stingray Dasyatis chrysonota is an important and endemic coastal inhabitant of southern African coastal waters however, it is listed as Near Threatened with declining populations. Understanding it’s spatial ecology in the context of current Marine Protected Areas (MPAs) is vital to not only inform population dynamics and ecological roles, but to determine whether currently zoned MPAs can provide sufficient protection to this species. Twenty-seven individuals were monitored using the Acoustic Tracking Array Platform (ATAP—a nation-wide collaborative network of acoustic receivers) for up to 4.5 years. Individuals displayed site affinity to defined regions of the coast, with the majority of detections for most individuals being recorded in the shallow bay/coastal shelf they were tagged in. However, important movement corridors linking different habitats were also identified (inshore vs offshore and coastal bay vs coastal shelf habitats). This habitat use varied monthly and was influenced by temperature, with individuals displaying restricted movements to the shallow bay habitat in summer when deeper waters were much colder. The large collaborative nature of the ATAP allowed for the monitoring of a benthic ray across large spatial scales for the first time, challenging preconceived notions that small undulatory batoids cannot travel large distances (many individuals were found to travel up to 200 km). Insights can also assist in local management of this species, and highlight that current MPA zonation may not be sufficient to protect blue stingrays from further population declines.

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Appendix
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Metadata
Title
Novel insights into coastal site affinity and habitat connectivity of a benthic stingray with implications for management
Authors
Chantel Elston
Paul D. Cowley
Taryn S. Murray
Matthew C. Parkinson
Publication date
05-11-2022
Publisher
Springer Netherlands
Published in
Biodiversity and Conservation / Issue 1/2023
Print ISSN: 0960-3115
Electronic ISSN: 1572-9710
DOI
https://doi.org/10.1007/s10531-022-02494-7

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