DETECTING GROUPER (EPINEPHELINAE) DIET COMPOSITION AND PREY AVAILABILITY IN RAJA AMPAT CORAL REEFS THROUGH DNA AND eDNA METABARCODING

Alpha diversity environmental DNA food web gut content analysis high-throughput sequencing

Authors

  • Hawis Madduppa Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, Institut Pertanian Bogor, Bogor 16680 , Indonesia
  • Dietriech Geoffrey Bengen Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, Institut Pertanian Bogor, Bogor 16680 , Indonesia https://orcid.org/0000-0002-3880-5117
  • Inna Puspa Ayu Department of Aquatic Living Resources Management, Faculty of Fisheries and Marine Science, Institut Pertanian Bogor, Bogor 16680 , Indonesia
  • Beginer Subhan Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, Institut Pertanian Bogor, Bogor 16680 , Indonesia https://orcid.org/0000-0002-2179-0721
  • Lalu M Iqbal Sani Oceanogen Environmental Biotechnology Laboratory, Bogor 16111 , Indonesia
  • Budi Prabowo
    budiprabowo25@gmail.com
    Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, Institut Pertanian Bogor, Bogor 16680 , Indonesia
June 10, 2021
March 2, 2023
April 1, 2023

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Gaining extensive knowledge of prey sources is an essential approach for understanding trophic structure and relationships, especially in highly diverse coral reef ecosystems. Groupers are a major Asian reef fish commodity, making it important to study grouper prey and the trophic relations involved. The wide distribution of groupers across different environments could lead to distinctive predatory behaviour. Therefore, this study was conducted to investigate and compare the taxonomic classification and composition of prey in the diets of two common groupers (Epinephelus areolatus and E. malabaricus) based on DNA metabarcoding of stomach contents and potential prey detection using environmental DNA tools at sites in the coral reefs of Raja Ampat, Indonesia. DNA recovered from the water column comprised taxa from the Arthropoda, Chordata, Cnidaria and Mollusca, several of which were also found in grouper guts, with Cnidaria the most abundant class. Diversity was high for potential prey species in the environment and prey consumed by each grouper species. The high overlap in prey identified from gut contents indicates these two epinephelids have a similar feeding strategy. However, nMDS ordination showed segregation between the prey consumed by each species and potential prey available in the environment. The results indicate a low likelihood of competition between the two grouper species, related to the abundance and wide choice of potential prey in the highly biodiverse Raja Ampat coral reef ecosystem.

How to Cite

DETECTING GROUPER (EPINEPHELINAE) DIET COMPOSITION AND PREY AVAILABILITY IN RAJA AMPAT CORAL REEFS THROUGH DNA AND eDNA METABARCODING. (2023). BIOTROPIA, 30(1), 37-50. https://doi.org/10.11598/btb.2023.30.1.1608