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Community structure of estuarine reef fish in Muara Ilu, Mahakam Delta, Indonesia
Syahrir, M.; Hanjoko, T.; Adnan, A.; Yasser, M.; Efendi, M.; Budiarsa, A.A.; Raafi, M.; Bulan, D.E. (2019). Community structure of estuarine reef fish in Muara Ilu, Mahakam Delta, Indonesia. AACL Bioflux 12(5): 1882-1901
In: Aquaculture, Aquarium, Conservation & Legislation - International Journal of the Bioflux Society. Bioflux: Romania. ISSN 1844-8143; e-ISSN 1844-9166
|   |
| Trefwoorden |
Pisces [WoRMS]
Marien/Kust |
| Author keywords |
coral, diversity index, Muara Ilu, reef fish |
| Auteurs | | Top |
- Syahrir, M.
- Hanjoko, T.
- Adnan, A.
- Yasser, M.
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- Efendi, M.
- Budiarsa, A.A.
- Raafi, M.
- Bulan, D.E.
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| Abstract |
The Mahakam Delta represents one of the largest tropical deltas in Indonesia located at Kutai Kartanegara, Kalimantan Island and it is heavily affected by sedimentation processes that impact the coral reef habitats. The reef-building corals and reef-inhabiting fish have a mutually symbiotic relationship, with corals providing food and habitat while depending on the grazing by certain fish for reproductive success. This research aims to investigate the coral reef condition and also the community structure of the reef fish in the Mahakam Delta. This study was conducted in July 2018, in Muara Ilu, Mahakam Delta. We observed the coral reef area and reef fish at 6 sites throughout the Mahakam River mouth. The condition of coral reefs and reef fish is assessed through scuba diving activities, using the video belt transect method, while reef fish surveys were done by the operated video transect diver method. The results showed that the coral reefs in the Muara Ilu waters of Tani Baru Village, Anggana District, Kutai Kartanegara Regency, have an area of 36.36 Ha, consisting of two stretches, "Batu Laut Muara Ilu", covering an area of 35.11 Ha and "Batu Darat Muara Ilu", covering 1.25 Ha. The percentage of live coral cover ranges from 2% to 46.4%, with an overall average of 28.5%, which is classified in moderate/moderate coral reef conditions. The reef fish community data from twelve transects showed high diversity and stable fish communities in the coral reef ecosystem from the study sites. The index values obtained are: H’=2.60; E=0.65; C=0.13. In conclusion, the diversity of reef fish was in the medium category, even distribution of species was present and no dominance by certain types was observed. |
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