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    • Corallivory, or coral predation, data derived from Structure-from-Motion imagery and in-situ surveys of coral reefs off of O'ahu, Hawai'i from 2021 to 2022

    Metadata Updated: August 16, 2025

    The data described here are raw corallivory, or coral predation, data from in situ visual surveys as well as derived corallivory data from Structure-from-Motion (SfM) imagery collected during diver transect surveys between 2021 and 2022. These surveys were conducted by a graduate student researcher from the University of Hawaii at Manoa, and funded by NOAA's Coral Reef Conservation Program (CRCP), with support from scientists of the Ecosystem Sciences Division (ESD) at the Pacific Islands Fisheries Science Center (PIFSC) of NOAA. This data was funded by CRCP Project number 31349 titled: 'Determining whether herbivore-focused management strategies enhance critical ecosystem functions provided by fishes'. The source SfM imagery will be accessible via Google Cloud bucket (see URLs).

    39 sites off of O'ahu, Hawai'i were established for this project. At each site, a 3x20m haphazardly placed transect was surveyed and imaged using underwater cameras. Along each transect, seven 1x1m quadrats spaced 3m apart were first surveyed for corallivory bite marks. After the survey was conducted, the same 3x20m transect was imaged using an underwater camera. Photographs were processed using Agisoft Metashape software to generate 2D orthomosaics. These orthomosaics were uploaded to ArcGIS Pro to be annotated for corallivory estimates.

    In water bite counts and estimates derived from SfM annotations will be compared with visual survey data to better understand the accuracy at which SfM annotations capture corallivory.

    Access & Use Information

    License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Date August 7, 2025
    Metadata Created Date January 24, 2025
    Metadata Updated Date August 16, 2025
    Reference Date(s) 2023 (creation), 2023 (publication)
    Frequency Of Update notPlanned

    Metadata Source

    Harvested from NMFS PIFSC

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Date August 7, 2025
    Metadata Created Date January 24, 2025
    Metadata Updated Date August 16, 2025
    Reference Date(s) 2023 (creation), 2023 (publication)
    Responsible Party (Point of Contact, Custodian)
    Contact Email
    Guid gov.noaa.nmfs.inport:68015
    Access Constraints Cite As: Pacific Islands Fisheries Science Center, [Date of Access]: Corallivory, or coral predation, data derived from Structure-from-Motion imagery and in-situ surveys of coral reefs off of O'ahu, Hawai'i from 2021 to 2022 [Data Date Range], https://www.fisheries.noaa.gov/inport/item/68015., Access Constraints: None, Use Constraints: Please cite NOAA Fisheries, Ecosystem Science Division (ESD) when using the data. Example: Ecosystem Science Division; Pacific Islands Fisheries Science Center, 2023: Corallivory Estimates derived from Structure-from-Motion Imagery and in-situ Surveys around Oahu, HI from 2021 to 2022 from 2010-06-15 to 2010-08-15. NOAA National Centers for Environmental Information, https://www.fisheries.noaa.gov/inport/item/68015., Distribution Liability: While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
    Bbox East Long -157.691881
    Bbox North Lat 21.649219
    Bbox South Lat 21.268008
    Bbox West Long -158.2251
    Coupled Resource
    Frequency Of Update notPlanned
    Harvest Object Id 28efa8b5-9e93-4762-b4af-0fd72a07edd9
    Harvest Source Id c0beac72-5f43-4455-8c33-1b345fbc2dfe
    Harvest Source Title NMFS PIFSC
    Licence NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose.
    Lineage Structure from Motion (SfM) techniques are increasingly being used to extract coral health metrics. In 2021 and 2022, new methods were developed, executed and tested to extract corallivory estimates from SfM models at sites around Oahu, Hawaii. At each site, a 3x20m haphazardly placed transect was surveyed for corallivory marks and imaged using underwater cameras. Seven 1x1m quadrats spaced 3m apart were first surveyed for corallivory bite marks along each transect. Spray painted fishing weights were used to mark placement of each quadrat. After the survey was completed, the same 3x20m transect was imaged using an underwater camera. Photographs were processed using Agisoft Metashape software to generate 2D orthomosaics. These orthomosaics were uploaded to ArcGIS Pro and were annotated for corallivory bite marks.
    Metadata Language eng
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-158.2251, 21.268008], [-157.691881, 21.268008], [-157.691881, 21.649219], [-158.2251, 21.649219], [-158.2251, 21.268008]]]}
    Progress completed
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True
    Temporal Extent Begin 2021-06-29
    Temporal Extent End 2022-10-28

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