Acoustic telemetry reveals cryptic residency of whale sharks

Handle URI:
http://hdl.handle.net/10754/564136
Title:
Acoustic telemetry reveals cryptic residency of whale sharks
Authors:
Cagua, Edgar F. ( 0000-0001-5867-3687 ) ; Cochran, Jesse ( 0000-0002-6027-5052 ) ; Rohner, Christoph A.; Prebble, Clare E M; Sinclair-Taylor, Tane; Pierce, Simon J.; Berumen, Michael L. ( 0000-0003-2463-2742 )
Abstract:
Althoughwhale sharks (Rhincodon typus) have beendocumentedtomove thousands of kilometres, they are most frequently observed at a few predictable seasonal aggregation sites. The absence of sharks at the surface during visual surveys has led to the assumption that sharks disperse to places unknown during the long 'off-seasons' at most of these locations. Here we compare 2 years of R. typus visual sighting records from Mafia Island in Tanzania to concurrent acoustic telemetry of tagged individuals. Sightings revealed a clear seasonal pattern with a peak between October and February and no sharks observed at other times. By contrast, acoustic telemetry demonstrated yearround residency of R. typus. The sharks use a different habitat in the offseason, swimming deeper and further away from shore, presumably in response to prey distributions. This behavioural change reduces the sharks' visibility, giving the false impression that they have left the area.We demonstrate, for the first timeto our knowledge, year-roundresidencyofunprovisioned, individual R. typus at an aggregation site, and highlight the importance of using multiple techniques to study the movement ecology of marine megafauna. © 2015 The Author(s) Published by the Royal Society. All rights reserved.
KAUST Department:
Red Sea Research Center (RSRC); Biological and Environmental Sciences and Engineering (BESE) Division; Marine Science Program; Reef Ecology Lab
Publisher:
The Royal Society
Journal:
Biology Letters
Issue Date:
1-Apr-2015
DOI:
10.1098/rsbl.2015.0092
PubMed ID:
25832816
PubMed Central ID:
PMC4424622
Type:
Article
ISSN:
17449561
Sponsors:
This study was supported by WWF Tanzania (grant CN74), KAUST Baseline Research Funding (to M.L.B.), the Shark Foundation, GLC Charitable Trust and a private trust (to S.J.P.).
Additional Links:
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4424622
Appears in Collections:
Articles; Red Sea Research Center (RSRC); Marine Science Program; Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorCagua, Edgar F.en
dc.contributor.authorCochran, Jesseen
dc.contributor.authorRohner, Christoph A.en
dc.contributor.authorPrebble, Clare E Men
dc.contributor.authorSinclair-Taylor, Taneen
dc.contributor.authorPierce, Simon J.en
dc.contributor.authorBerumen, Michael L.en
dc.date.accessioned2015-08-03T12:33:41Zen
dc.date.available2015-08-03T12:33:41Zen
dc.date.issued2015-04-01en
dc.identifier.issn17449561en
dc.identifier.pmid25832816en
dc.identifier.doi10.1098/rsbl.2015.0092en
dc.identifier.urihttp://hdl.handle.net/10754/564136en
dc.description.abstractAlthoughwhale sharks (Rhincodon typus) have beendocumentedtomove thousands of kilometres, they are most frequently observed at a few predictable seasonal aggregation sites. The absence of sharks at the surface during visual surveys has led to the assumption that sharks disperse to places unknown during the long 'off-seasons' at most of these locations. Here we compare 2 years of R. typus visual sighting records from Mafia Island in Tanzania to concurrent acoustic telemetry of tagged individuals. Sightings revealed a clear seasonal pattern with a peak between October and February and no sharks observed at other times. By contrast, acoustic telemetry demonstrated yearround residency of R. typus. The sharks use a different habitat in the offseason, swimming deeper and further away from shore, presumably in response to prey distributions. This behavioural change reduces the sharks' visibility, giving the false impression that they have left the area.We demonstrate, for the first timeto our knowledge, year-roundresidencyofunprovisioned, individual R. typus at an aggregation site, and highlight the importance of using multiple techniques to study the movement ecology of marine megafauna. © 2015 The Author(s) Published by the Royal Society. All rights reserved.en
dc.description.sponsorshipThis study was supported by WWF Tanzania (grant CN74), KAUST Baseline Research Funding (to M.L.B.), the Shark Foundation, GLC Charitable Trust and a private trust (to S.J.P.).en
dc.publisherThe Royal Societyen
dc.relation.urlhttp://www.ncbi.nlm.nih.gov/pmc/articles/PMC4424622en
dc.subjectIndividual photo-identificationen
dc.subjectMovement ecologyen
dc.subjectRecapture probabilityen
dc.subjectResidency patternsen
dc.subjectUnderwater acoustic telemetryen
dc.subjectVisual surveyen
dc.titleAcoustic telemetry reveals cryptic residency of whale sharksen
dc.typeArticleen
dc.contributor.departmentRed Sea Research Center (RSRC)en
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentMarine Science Programen
dc.contributor.departmentReef Ecology Laben
dc.identifier.journalBiology Lettersen
dc.identifier.pmcidPMC4424622en
dc.relation.referencesCagua, E. F., Cochran, J. E. M., Rohner, C. A., Prebble, C. E. M., Sinclair-Taylor, T. H., Pierce, S. J., & Berumen, M. L. (2015). Data from: Acoustic telemetry reveals cryptic residency of whale sharks (Version 1) [Data set]. Dryad Digital Repository. https://doi.org/10.5061/dryad.g6c5qen
dc.relation.referencesDOI:10.5061/DRYAD.G6C5Qen
dc.relation.referencesHANDLE:http://hdl.handle.net/10754/624183en
dc.contributor.institutionMarine Megafauna AssociationInhambane, Mozambiqueen
kaust.authorCagua, Edgar F.en
kaust.authorCochran, Jesseen
kaust.authorSinclair-Taylor, Taneen
kaust.authorBerumen, Michael L.en

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