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Edrus, Isa Nagib
Oseanologi dan Limnologi di Indonesia
Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Environmental Science

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Condition of Coral Fish in Tapanuli Tengah Waters Suharti, Sasanti Retno; Edrus, Isa Nagib
Oseanologi dan Limnologi di Indonesia Vol 3, No 2 (2018)
Publisher : Oseanologi dan Limnologi di Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/oldi.v3i2.112

Abstract

Coral reefs is a center for biodiversity in the world with a complex architecture and has an aesthetics value. It also offers beneficial for human being in many aspects such as economics, social and culture. Research was conducted in July 2016 and aim to understand community structure and biomass of coral reef fishes in Tapanuli Tengah waters. Result from all stations in Tapanuli Tengah waters showed that 49 species from seven families of economically reef fish i.e.  Acanthuridae, Serranidae, Haemulidae, Lutjanidae, Lehtrinidae, Siganidae and Scaridae were found. Density average of those seven families was 163 individual/350 m2 or 4668 individual/ha with biomass average of 1.564 ton/ha. Moreover, biomass from other target fishes from nine families was accounted as 0.56 ton/ha. On the other hand, over all coralifore fish represented by Chaetodontidae was eight species from two genus, namely Chaetodon and Heniochus with four species. The density from family Chaetodotidae varies among station between 3-28 individual/350 m2
Reef Fish Community Condition in The Adjacent Waters of Ternate Island Utama, Rizkie Satriya; Edrus, Isa Nagib; Makatipu, Petrus Christianus
Oseanologi dan Limnologi di Indonesia Vol 4, No 1 (2019)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (633.799 KB) | DOI: 10.14203/oldi.2019.v4i1.228

Abstract

Coastal development of North Molluccas put concern to coral reefs and reef fishes to be a vital regional asset and also a vurnarable consequence toward the development effects. A method used was underwater visual cencus on the permanent belt transect. The selected indicator monitoring used were eight families of reef fishes. Results showed that there were 108 species of reef fishes identified, consist of  31 species indicator fishes of corallivore, 45 species herbivorous fishes and 32 species carnivorous fishes (based on punctuation group). Density means of a corallivorous group is 1,598 ± 283 individual/ha, a herbivorous group is 4,751 ± 1.034 individual/ha, and a carnivorous group is 890 ± 622 ekor/ha, respectively. A mean of reef fish stocks is 420 ± 162 kg/ha that consist of 320 ± 130 kg/ha for herbivorous fishes and  group and 100 ± 64 kg/ha for carnivorous fishes. Indicator fish dominance were attained by Chaetodon kleinii, Chaetodon lunulatus,  Chaetodon baronessa, Heniochus varius, Chaetodon melannotus, Chaetodon trifascialis, and Chaetodon octofasciatus. Herbivorous fishes (84%) more dominat than  carnivorous (16%) in terms of individual composition. Dominant species of herbivorous fishes included Ctenochaetus striatus, Ctenochaetus binotatus, Zebrasoma scopas, Scarus ghobban, Lutjanus biguttatus, Acanthurus pyroferus, Chlorurus sordidus, Chlorurus bleekeri, Siganus vulpinus, and Scarus dimidiatus. The one of carnivorous fishes dominated was only Lutjanus biguttatus. Increasing trend of species numbers and density for corallivorous, herbivorous and carnivorous fishes occured during 2015 and 2017 in majority of study sites. Contrarily, the biomass values not increased in majority of the sampling sites.
Co-Authors Makatipu, Petrus Christianus Sasanti Retno Suharti, Sasanti Retno Utama, Rizkie Satriya