Reef fish abundance, size and biomass from Aldabra Atoll (Seychelles) between 2014 and 2021 collected by the Seychelles Islands Foundation

Latest version published by OBIS Secretariat on 24 October 2023 OBIS Secretariat
Publication date:
24 October 2023
Published by:
OBIS Secretariat
CC0 1.0

Download the latest version of this resource data as a Darwin Core Archive (DwC-A) or the resource metadata as EML or RTF:

Data as a DwC-A file download 11,809 records in English (469 KB) - Update frequency: not planned
Metadata as an EML file download in English (10 KB)
Metadata as an RTF file download in English (9 KB)


Data was collected at Aldabra Atoll (Seychelles) by SIF staff and volunteers as part of the SIF Aldabra Reef Monitoring (ARM) programme at 12 monitoring sites between 2014 and 2021. Nine sites are on the seaward reef with permanently marked transects at both 5 m and 15 m water depth; three sites are inside the lagoon with permanently marked transects at 2 m water depth. Fish visual census surveys were conducted along one to three 50 × 4 m belt transects (i.e., one transect = 200 m2; 10 m gap between replicate transects) marked by surveyors with tape measures. The first transect was always the permanently marked transect; subsequent replicate transects were surveyed along the same compass bearing and following the same depth contour as the permanent transect. All transects of the same depth at each site were surveyed during the same dive. These data also contain occurrence data from BRUV and RUV surveys done in 2020, as well as subsistence fishery data (most recent catch events per species between 2016 and 2020) sent directly from the Seychelles Islands Foundation.

Data Records

The data in this occurrence resource has been published as a Darwin Core Archive (DwC-A), which is a standardized format for sharing biodiversity data as a set of one or more data tables. The core data table contains 11,809 records.

This IPT archives the data and thus serves as the data repository. The data and resource metadata are available for download in the downloads section. The versions table lists other versions of the resource that have been made publicly available and allows tracking changes made to the resource over time.


The table below shows only published versions of the resource that are publicly accessible.

How to cite

Researchers should cite this work as follows:

A'Bear L, Bielsa M, Burt A J, Chong-Seng K, Haupt P, Koester A, Earl C (2023). Reef fish abundance, size and biomass from Aldabra Atoll (Seychelles) between 2014 and 2021 collected by the Seychelles Islands Foundation. Version 2.0. OBIS Secretariat. Occurrence dataset. https://doi.org/10.25607/hpsg9j


Researchers should respect the following rights statement:

The publisher and rights holder of this work is OBIS Secretariat. To the extent possible under law, the publisher has waived all rights to these data and has dedicated them to the Public Domain (CC0 1.0). Users may copy, modify, distribute and use the work, including for commercial purposes, without restriction.

GBIF Registration

This resource has been registered with GBIF, and assigned the following GBIF UUID: 34f52594-5857-44a2-aa8b-8b59c42f2ee2.  OBIS Secretariat publishes this resource, and is itself registered in GBIF as a data publisher endorsed by Ocean Biodiversity Information System.




Luke A'Bear
  • Originator
Seychelles Islands Foundation
Maria Bielsa
  • Originator
Seychelles Islands Foundation
April Jasmine Burt
  • Originator
Seychelles Islands Foundation
Karen Chong-Seng
  • Originator
Seychelles Islands Foundation
Philip Haupt
  • Originator
Seychelles Islands Foundation
Anna Koester
  • Originator
Seychelles Islands Foundation
Chandra Earl
  • Metadata Provider
  • Processor
eDNA Scientific Officer
OBIS Secretariat
  • Point Of Contact

Geographic Coverage

Aldabra Atoll

Bounding Coordinates South West [-9.507, 46.187], North East [-9.351, 46.538]

Taxonomic Coverage


Superclass Agnatha
Unranked Chondrichthyes, Osteichthyes

Sampling Methods

No Description available

Method step description:

  1. See Github Project and R Notebook for dataset construction methods

Bibliographic Citations

  1. A'Bear, Luke; Bielsa, Maria; Burt, April Jasmine; Chong-Seng, Karen; Haupt, Philip; Koester, Anna; et al. (2023). Reef fish abundance, size and biomass from Aldabra Atoll (Seychelles) between 2014 and 2021 collected by the Seychelles Islands Foundation. Figshare. Dataset. https://doi.org/10.6084/m9.figshare.22792580.v1

Additional Metadata

marine, harvested by iOBIS

Purpose These data were made accessible through UNESCO's eDNA Expeditions project to mobilize available marine species and occurrence datasets from World Heritage Sites.
Alternative Identifiers 10.25607/hpsg9j