Keanekaragaman dan Biomassa Ikan Karang serta Keterkaitannya dengan Tutupan Karang Hidup di Perairan Manggis, Kabupaten Karangasem, Bali

Abstract

The existence of coral reef fish is closely related to the availability of coral reef resource as a habitat. Coral reef fish is a biota that has a fascination with a variety of color patterns and fascinating. Differences in coral cover conditions will affect the abundance of coral reef fish, especially those with strong linkages to living corals. This research was conducted in June - August 2017 by using line intercept transect (LIT) method for coral cover percentage and visual census method for biodiversity and biomass of coral reef fish with 3 research stations in Manggis waters, Karangasem. From the research results, it shows that the diversity index ranged between 2.54 - 2.70 which means the diversity of coral reef fish in the medium category and the stability of the community is in the medium. Furthermore, total biomass of coral reef fish ranged between 186,17 - 1692,08 kg / ha. The results stated that the percentage of live coral cover in Manggis waters ranged from 3.83% to 12.44% which means that live coral cover is categorized as bad. A very strong positive correlation between living coral conditions and coral reef fish biomass was 92.42%. Meanwhile, the relationship between living coral conditions and the diversity of coral reef fish had a strong positive correlation of 65.4%. The diversity of coral reef fish in waters is not only caused by live coral cover; however, it is caused by coral reef ecosystems that are associated in the bottom of the waters.

The Current Condition of Coral Reef and Fish Diversity in Gosong Island, Southwest Aceh

“…The average abundance of reef fish biomass on Gosong Island is 274.1 ± 1496.4 kg/ha The highest biomass is found at station one with a value of 5007.6 ± 4327.75 kg/ha and the lowest biomass is at station three with biomass of 93,4 ± 29.8 kg/ha (Figure 10). The average abundance of reef fish biomass in the research location is higher than in several other locations that have been researched, such as Putra et al (2019) in Mangosteen waters of Karangasem, Bali and Fazillah et al (2020) in waters of Ujong Pancu Aceh Besar.…”

Temporal study of coral reef health in Kepulauan Seribu Marine National Park

“…Reef fish are fish that live part or all of their lives in coral reef ecosystem. The composition of reef fish found is influenced by the condition of coral reefs, chemical, physical, and biological conditions of the waters [23]. The results of observing the composition of reef fish from eight observation stations in the Kepulauan Seribu Marine National Park area during two monitoring sessions (see Figure 10) showed that in the first monitoring, there were 18 families of reef fish, 34 genera, 62 species, and 3139 individuals.…”

Kajian Ikan Terumbu Karang dengan persentase Tutupan Terumbu Karang Hidup di Kawasan Konservasi Perairan Tanjung Labu Kabupaten Bangka Selatan

“…Pada stasiun 1 secara keseluruhan jumlah kelimpahan ikan terumbu karang lebih rendah dibandingkan dengan statiun 4, akan tetapi pada family Pomacentridae dan family Labridae jumlah individu lebih tinggi dibandingkan dengan stasiun 1 sehingga menghasilkan biomassa yang tinggi. Biomassa ikan terumbu karang yang tinggi berkaitan dengan jumlah individu yang tinggi dan ukuran tubuh yang panjang (Fazillah et al, 2020; I. M. R. Putra et al, 2018;Ritonga et al, 2022).…”