Fisheries and Aquatic Sciences

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Biak and Wakatobi reefs are the two hottest hotspots of coral reef fish diversity and abundance in the Indonesian Archipelago

  • Imam Bachtiar ( Department of Mathematics and Science Education, FKIP, University of Mataram) ;
  • Edwin Jefri ( Department of Marine Science, Faculty of Agriculture, University of Mataram) ;
  • Muhammad Abrar ( Research Center for Oceanography, National Board for Research and Innovation) ;
  • Tri Aryono Hadi ( Research Center for Oceanography, National Board for Research and Innovation)
  • Received : 2022.08.03
  • Accepted : 2022.10.14
  • Published : 2022.11.30
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Abstract

The Indonesian Archipelago has a very complex geological history, along with equatorial warm sea temperature, resulting in diverse types of coral reefs and high diversity of coral reef fish. Many livelihoods of the coastal community are dependent on coral reef fisheries. The present study aimed to determine which region and location in the Indonesian Archipelago has the most diverse and abundant coral reef fish. The archipelago was divided into four regions: the Indian Ocean, Sunda Shelf, Wallacea, and the Pacific Ocean. Data were obtained from a national coral reef monitoring program of the Indonesian Research Center for Oceanography (RCO)-the National Board for Research and Innovation (BRIN). The reef fish data were collected using the underwater visual census method, from 321 belt transects on 24 locations (districts) across the archipelago. The results show that coral reef fish diversity of the Pacific region was the highest across the archipelago for all three trophic levels, i.e., corallivore, herbivore, and carnivore fish. The Pacific Ocean region also had the highest fish abundance for the three trophic levels. Comparison among locations revealed that the best ten locations in reef fish diversity and abundance were Sabang, Mentawai, Makassar, Selayar, Buton, Luwuk, Ternate, Raja Ampat, Biak, and Wakatobi. Wakatobi reefs showed their supremacy in carnivore fish diversity and abundance, while Biak reefs were the best in herbivore fish. The abundance of corallivore fish was also considerably high in Sabang reefs, but it is still lower than in Raja Ampat, Biak, and Wakatobi reefs. These results provide empirical evidence that the coral reefs of Wakatobi and Biak are the hottest hotspots of coral reef fish diversity and abundance in the Indonesian Archipelago.

Keywords

Acknowledgement

Data collections were carried out by RCO-LIPI in collaboration with six state universities of Indonesia, i.e., University of Mataram, Diponegoro University, Hasanuddin University, Sam Ratulangi University, Bung Hata University, and Raja Ali Haji University.

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