A quantitative comparison of towed-camera and diver-camera transects for monitoring coral reefs

dc.citation.volume9
dc.contributor.authorCresswell AK
dc.contributor.authorRyan NM
dc.contributor.authorHeyward AJ
dc.contributor.authorSmith ANH
dc.contributor.authorColquhoun J
dc.contributor.authorCase M
dc.contributor.authorBirt MJ
dc.contributor.authorChinkin M
dc.contributor.authorWyatt M
dc.contributor.authorRadford B
dc.contributor.authorCostello P
dc.contributor.authorGilmour JP
dc.contributor.editorToonen R
dc.coverage.spatialUnited States
dc.date.accessioned2024-01-04T01:38:54Z
dc.date.accessioned2024-07-25T06:46:58Z
dc.date.available2021-04-14
dc.date.available2024-01-04T01:38:54Z
dc.date.available2024-07-25T06:46:58Z
dc.date.issued2021
dc.description.abstractNovel tools and methods for monitoring marine environments can improve efficiency but must not compromise long-term data records. Quantitative comparisons between new and existing methods are therefore required to assess their compatibility for monitoring. Monitoring of shallow water coral reefs is typically conducted using diver-based collection of benthic images along transects. Diverless systems for obtaining underwater images (e.g. towed-cameras, remotely operated vehicles, autonomous underwater vehicles) are increasingly used for mapping coral reefs. Of these imaging platforms, towed-cameras offer a practical, low cost and efficient method for surveys but their utility for repeated measures in monitoring studies has not been tested. We quantitatively compare a towed-camera approach to repeated surveys of shallow water coral reef benthic assemblages on fixed transects, relative to benchmark data from diver photo-transects. Differences in the percent cover detected by the two methods was partly explained by differences in the morphology of benthic groups. The reef habitat and physical descriptors of the site-slope, depth and structural complexity-also influenced the comparability of data, with differences between the tow-camera and the diver data increasing with structural complexity and slope. Differences between the methods decreased when a greater number of images were collected per tow-camera transect. We attribute lower image quality (variable perspective, exposure and focal distance) and lower spatial accuracy and precision of the towed-camera transects as the key reasons for differences in the data from the two methods and suggest changes to the sampling design to improve the application of tow-cameras to monitoring.
dc.description.confidentialfalse
dc.format.paginatione11090-
dc.identifier.author-urlhttps://www.ncbi.nlm.nih.gov/pubmed/33954031
dc.identifier.citationCresswell AK, Ryan NM, Heyward AJ, Smith ANH, Colquhoun J, Case M, Birt MJ, Chinkin M, Wyatt M, Radford B, Costello P, Gilmour JP. (2021). A quantitative comparison of towed-camera and diver-camera transects for monitoring coral reefs.. PeerJ. 9. (pp. e11090-).
dc.identifier.doi10.7717/peerj.11090
dc.identifier.eissn2167-8359
dc.identifier.elements-typejournal-article
dc.identifier.issn2167-8359
dc.identifier.numberARTN e11090
dc.identifier.pii11090
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/70861
dc.languageeng
dc.publisherPeerJ Inc.
dc.publisher.urihttps://peerj.com/articles/11090/
dc.relation.isPartOfPeerJ
dc.rights(c) 2021 The Author/s
dc.rightsCC BY 4.0
dc.rights.urihttps://www.creativecommons.org/licenses/by/4.0/
dc.subjectBenthic
dc.subjectCoral reef monitoring
dc.subjectImage analysis
dc.subjectMapping
dc.subjectMethodology
dc.subjectMethods comparison
dc.subjectTechnology
dc.subjectTowed video
dc.titleA quantitative comparison of towed-camera and diver-camera transects for monitoring coral reefs
dc.typeJournal article
pubs.elements-id444878
pubs.organisational-groupOther
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