In:
PLOS ONE, Public Library of Science (PLoS), Vol. 18, No. 6 ( 2023-6-16), p. e0286664-
Abstract:
Offshore sand shoals are a coveted sand source for coastal restoration projects and as sites for wind energy development. Shoals often support unique fish assemblages but their habitat value to sharks is largely unknown due to the high mobility of most species in the open ocean. This study pairs multi-year longline and acoustic telemetry surveys to reveal depth-related and seasonal patterns in a shark community associated with the largest sand shoal complex in east Florida, USA. Monthly longline sampling from 2012–2017 yielded 2,595 sharks from 16 species with Atlantic sharpnose ( Rhizoprionodon terraenovae ), blacknose ( Carcharhinus acronotus ), and blacktip ( C . limbatus ) sharks being the most abundant species. A contemporaneous acoustic telemetry array detected 567 sharks from 16 species (14 in common with longlines) tagged locally and by researchers elsewhere along the US East Coast and Bahamas. PERMANOVA modeling of both datasets indicate that the shark species assemblage differed more across seasons than water depth although both factors were important. Moreover, the shark assemblage detected at an active sand dredge site was similar to that at nearby undisturbed sites. Water temperature, water clarity, and distance from shore were habitat factors that most strongly correlated to community composition. Both sampling approaches documented similar single-species and community trends but longlines underestimated the shark nursery value of the region while telemetry-based community assessments are inherently biased by the number of species under active study. Overall, this study confirms that sharks can be an important component of sand shoal fish communities but suggests that deeper water immediately adjacent to shoals (as opposed to shallow shoal ridges) is more valuable to some species. Potential impacts to these nearby habitats should be considered when planning for sand extraction and offshore wind infrastructure.
Type of Medium:
Online Resource
ISSN:
1932-6203
DOI:
10.1371/journal.pone.0286664
DOI:
10.1371/journal.pone.0286664.g001
DOI:
10.1371/journal.pone.0286664.g002
DOI:
10.1371/journal.pone.0286664.g003
DOI:
10.1371/journal.pone.0286664.g004
DOI:
10.1371/journal.pone.0286664.g005
DOI:
10.1371/journal.pone.0286664.g006
DOI:
10.1371/journal.pone.0286664.g007
DOI:
10.1371/journal.pone.0286664.g008
DOI:
10.1371/journal.pone.0286664.t001
DOI:
10.1371/journal.pone.0286664.t002
DOI:
10.1371/journal.pone.0286664.t003
DOI:
10.1371/journal.pone.0286664.s001
DOI:
10.1371/journal.pone.0286664.s002
DOI:
10.1371/journal.pone.0286664.s003
DOI:
10.1371/journal.pone.0286664.s004
DOI:
10.1371/journal.pone.0286664.s005
DOI:
10.1371/journal.pone.0286664.s006
DOI:
10.1371/journal.pone.0286664.s007
DOI:
10.1371/journal.pone.0286664.s008
DOI:
10.1371/journal.pone.0286664.r001
DOI:
10.1371/journal.pone.0286664.r002
DOI:
10.1371/journal.pone.0286664.r003
DOI:
10.1371/journal.pone.0286664.r004
Language:
English
Publisher:
Public Library of Science (PLoS)
Publication Date:
2023
detail.hit.zdb_id:
2267670-3
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