Abstract:
Diversity of reef fish in Halang Melingkau Island, South Kalimantan,
Indonesia. Biodiversitas 21: 4804-4812. Reef fish is one benchmark to determine a coral reef ecosystem's biodiversity. Reef fish
communities are important in coral reef ecosystems because of their trophic relationships with other biotic components. The aim of this
study was to determine the biodiversity of reef fish on Halang Melingkau Island, Kotabaru District, South Kalimantan, Indonesia. This
research was conducted in March-August 2019. Coral reef fish data were collected using an underwater visual census method. Transects
were applied as close as possible to the substrate using a 50 m roll-up measuring tape. Three transects were applied at each station. A
total of 98 reef fish species from 19 families were recorded in this study. The fish community in Halang Melingkau island belongs to the
family of Pomacentridae, Labridae, Chaetodontidae, Scaridae, Haemulidae, Lutjanidae, Scolopsidae, Serranidae, Caesionidae,
Holocentridae, Siganidae, Pomacanthidae, Apogonidae, Pempheridae, Scorpaenidae, Tetraodontidae, Blenniidae, Platacidae, and
Zanclidae. The highest abundance of reef fish was 1.88 ind/m2
, and the lowest was 0.14 ind/m2
. The dominance index (C) ranged from
0.03 to 0.13, the homogeneity index (E') ranged from 0.72 and 0.94, and the diversity index (H') ranged from 2.17 to 3.53. Water quality
data measurements of temperature, brightness, current speed, pH, and DO (Dissolved Oxygen) were within the tolerance limits of water
quality standards based on the Minister of Environment Decree No. 51 of 2004, Republic of Indonesia.
