KELIMPAHAN IKAN KARANG PADA KAWASAN TERUMBU BUATAN DI PERAIRAN RATATOTOK SULAWESI UTARA

Ekosistemterumbu karangmerupakan salah satu potensi sumberdaya laut yang sangat penting bagi kehidupan manusia. Potensi sumberdaya ikan karang di perairan Indonesia perlu diketahui agar dapat dikembangkan sebagai salah satu aset dalamkegiatan pariwisata bahari. Penelitian yang dilakukan tahun 2009-2011 bertujuan untuk mengetahui kelimpahan dan komposisi jenis ikan karang pada kawasan terumbu buatan di perairan Ratatotok. Metode line transect dan sensus visual pada perairan seluas 250M2 digunakan untuk mengetahui kelimpahan ikan karang dengan keragaman jenis pada masing-masing stasiun pengamatan pada kedalaman 10 meter. Hasil penelitian telah teridentifikasi sebanyak 116 spesies ikan pada terumbu buatan Stasiun 1 (daerah Teluk Buyat); 112 spesies pada terumbu buatan Stasiun 2 (daerah Tanjung) dan pada terumbu alami di Stasiun 3 (daerah Ratatotok) sebanyak 88 spesies. Kelimpahan ikan pada kawasan terumbu buatan lebih tinggi pada kisaran 24-28 spesies daripada karang alami. Kelimpahan spesies ikan dari famili Pomacentridae mendominasi ketiga stasiun pengamatan dengan 19 spesies dan yang paling sedikit dari famili Anomalopidae yang hanya ditemukan 1 spesies.Coral reef ecosystem is one of important natural resources in tropical waters. It has some coral reef fishes, species of corals and others biota that have several most interesting ecotourism extraction scientific and educational objects. The aim of this study is to determine the abundance of coral fish composition surrounded in artificial reefs area in Ratatotok waters. This study was done during 2009 to 2011by using the visual census and line transect methods within area of 250 M2 to observe the species composition and diversitas of coral fishes founded in three sites at the depth of 10 m from sea surface. The results showed that there were 116 species in Site 1(Buyat bay); 112 species in Site 2 (Tanjung) and 88 species of coral reef fishes in Site 3 (Ratatotok). Fishes of Pomacentridae were found 19 species in all locations. Only one species fish of Anomalopidae was found.

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HUBUNGAN PERSENTASE TUTUPAN KARANG DENGAN KELIMPAHAN IKAN KARANG DI PULAU MENJANGAN KECIL, KEPULAUAN KARIMUNJAWA, KABUPATEN JEPARA,JAWA TENGAH (Relationship of Coral Cover Percentage with Reef Fishes Abundance in Menjangan Kecil Island, Karimunjawa Island, Jepara)

Management of Aquatic Resources Journal (MAQUARES) ◽

10.14710/marj.v6i4.21321 ◽

2018 ◽

Vol 6 (4) ◽

pp. 333-338

Author(s):

Fahmi Fahmi ◽

Supriharyono Supriharyono ◽

Abdul Ghofar

Keyword(s):

Coral Reef ◽

Coral Reefs ◽

Reef Fish ◽

Coral Cover ◽

Reef Fishes ◽

Line Transect ◽

Live Coral ◽

East Side ◽

Visual Census ◽

West Side

Ekosistem terumbu karang merupakan kekayaan sumberdaya laut yang memiliki peranan penting dalam mendukung kehidupan berbagai organisme perairan. Salah satu organisme yang memiliki ketergantungan hidup pada terumbu karang adalah ikan karang. Hal ini dikarenakan ikan karang melalui fase hidup sebagian atau seluruhnya di terumbu karang, sehingga terumbu karang menjadi tempat tinggal, tempat mencari makan, tempat berlindung dan tempat berkembang biak. Penelitian dilaksanakan pada bulan Mei 2017, dengan tujuan untuk mengetahui persentase tutupan karang hidup dan kelimpahan ikan. Serta hubungan persentase tutupan karang dengan kelimpahan ikan karang pada sisi Barat dan Timur Pulau Menjangan Kecil kedalaman 1 dan 3 meter. Metode yang digunakan adalah metode observasi lapangan, dengan metode sampling menggunakan transek garis (line transect) pada data karang dan visual census untuk data ikan sepanjang 25m. Hasil dari penelitian ini menunjukkan bahwa Persentase rata-rata tutupan karang yang diperoleh pada kedalaman 1 meter sisi Barat adalah 73,39%, sedangkan pada kedalaman 3 meter adalah 85,97%. Persentase tutupan karang pada kedalaman 1 meter sisi Timur adalah 63,73%, sedangkan pada kedalaman 3 meter adalah 77,61%. Secara keseluruhan kondisi terumbu karang masih tergolong baik. Kelimpahan rata-rata ikan pada sisi Barat kedalaman 1 meter adalah 70 individu/125 m2, sedangkan pada kedalaman 3 meter adalah 232 individu/125 m2. Kelimpahan ikan sisi Timur kedalaman 1 dan 3 meter masing-masing adalah 49 dan 138 individu/125 m2. Hasil perhitungan indeks korelasi secara keseluruhan menghasilkan nilai 0,8415 dengan koefesien determinasi sebesar 0,7081. Hal ini menunjukkan bahwa pola hubungan persentase tutupan karang dengan kelimpahan ikan karang kuat (signifikan) dan positif (searah). Coral reef ecosystem is a wealth of marine resources that have an important role in supporting the life of various aquatic organisms. One of the organisms that has a living dependence on coral reefs is reef fish. This is because coral fish through a partial or complete life phase on the coral reef, so that coral reefs become a place to live, a place to find food, shelter and breeding ground. The study was conducted in May 2017, with the objective of knowing the percentage of live coral cover and fish abundance. And the correlation of percentage of coral cover with abundance of reef fish on West and East side of Menjangan Kecil Island depth of 1 and 3 meters. The method used is field observation method, with sampling method using line transect on coral data and visual census for fish data along 25m. The results of this study indicate that the average percentage of coral cover obtained at a depth of 1 meter west side is 73.39%, while at a depth of 3 meters is 85.97%. The percentage of coral cover at depth of 1 meter East side is 63,73%, while at depth 3 meter is 77,61%. Overall the condition of coral reefs is still quite good. The average abundance of fish on the west side of 1 meter depth is 70 individuals / 125 m2, while at 3 meters depth is 232 individuals / 125 m2. The abundance of fish on Eastern side, depth of 1 and 3 meters respectively were 49 and 138 individu / 125 m2. Result of calculation of correlation index as a whole yield value 0,8415 with coefficient of determination equal to 0,7081. This shows that the pattern of correlation of percentage of coral cover with abundance of reef fish is strong (significant) and positive (unidirectional).

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Condition of Coral Reefs and Reef Fishes in Dofa Village, Sula Islands Regency

Journal of Applied Geospatial Information ◽

10.30871/jagi.v5i1.2803 ◽

2021 ◽

Vol 5 (1) ◽

pp. 431-436

Author(s):

Alimuddin Alimuddin ◽

Nurul Chayati ◽

Tedy Murtejo ◽

La Ode M. Gunawan Giu ◽

Ria Fitri

Keyword(s):

Coral Reef ◽

Coral Reefs ◽

Current Velocity ◽

Reef Fishes ◽

Fish Diversity ◽

Live Coral ◽

Coral Reef Ecosystem ◽

Coral Fish ◽

Index Value ◽

Reef Ecosystem

Coral reefs are unique among ocean associations or communities that are entirely formed by biological activity. This study aims to determine the condition of coral reefs and reef fishes in Dofa Village, West Mangoli District, Sula Islands, 2018. Collecting coral data used the Line Intercept Transect (LIT) method, while coral fish data collection used the visual census method. Water parameters measured are temperature, salinity, degree of acidity (pH), brightness and current velocity. Based on observations, the water temperature ranges from 29.33° C - 29.9° C. The salinity of the waters ranges from 29.67 ‰ - 34 ‰. The degree of acidity is 7.5 which supports the life of coral reef. The water brightness level is 65% - 100%. The current velocity ranges from 0.02 m / s to 0.05 m / s. The condition of the coral reef ecosystem based on the percentage of hard coral cover ranged from 21.02% - 33.7% with low to medium category. The coral mortality index at the study location was small where at station 1 it was 0.487, station 2 was 0.335 and station 3 was 0.205, meaning that there was no significant change for live coral reefs. The abundance of reef fishes ranged from 0.52 ind/m2 - 1.22 ind/m2 which was dominated by the Pomacentridae and Labridae families where the two families were groups of fish that used coral reefs as habitat for feeding ground. The index value of coral fish diversity in the coral reef ecosystem at all stations ranged from 0.58 to 3.60 where the diversity index value was in the low to medium category. The uniformity index is included in the medium category with values ranging from 0.58 to 0.63 which illustrates that the difference in the number of individuals for each species is not too significant. The dominance index of reef fishes at the observation station is very small, ranging from 0.03 - 0.07 which indicates that the dominance of the species is very low, so that the condition of the reef fish community is relatively stable.

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Predator biomass, prey density, and species composition effects on group size in recruit coral reef fishes

Marine Biology ◽

10.1007/s00227-011-1745-0 ◽

2011 ◽

Vol 158 (11) ◽

pp. 2437-2447 ◽

Cited By ~ 7

Author(s):

Edward E. DeMartini ◽

Todd W. Anderson ◽

Alan M. Friedlander ◽

James P. Beets

Keyword(s):

Coral Reef ◽

Species Composition ◽

Group Size ◽

Prey Density ◽

Reef Fishes ◽

Coral Reef Fishes ◽

Composition Effects

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Coral Reef Fishes Biodiversity In Pahawang Island,Pesawaran District Lampung

AQUASAINS ◽

10.23960/aqs.v9i1.p887-892 ◽

2020 ◽

Vol 9 (1) ◽

pp. 887

Author(s):

Darma Yuliana ◽

Ayu Rahmasari ◽

Herman Yulianto ◽

Abdullah Aman Damai

Keyword(s):

Coral Reef ◽

Reef Fish ◽

Coral Reef Fish ◽

Diversity Index ◽

Similarity Index ◽

Reef Fishes ◽

Coral Reef Fishes ◽

Line Transect ◽

Marine Tourism ◽

Reef Health

The components of coral reef ecosystem can be described by the unique regulation in community level. Coral reef fishes use coral reef as their habitat and they highly depend on coral reef health. Otherwise, the condition of coral reef health can be predicted by the biodiversity of coral reef fishes. The research aim was describe communities differences between two explored area in marine tourism spots in Pahawang Island. This research was conducted on November 2019 at two stations on the coral reefs ecosystem of Pahawang Island represented the two quitely different area, the marine tourism and the visitor areas. The coral reef fishes were observed by using visual census method with a Line Transect length of 30 meters and a visibility of 2.5 meters left and right of the transect. Coral reef fish community structure was measured by diversity, similarity, and dominancy indexes. A total of 1.940 coral reef fish species from 13 families were recorded. Pomacentridae is the most speciose family (1.091 species), followed by Siganidae (308 species) and Labridae (166 species). Biodiversity of coral reef fishes at Pahawang Island showed results diversity index (H') in both observation stations classified as medium with a low dominance index value (C) and similarity index (E) at both stations classified as high, presumably as a result of tourism activities. The diversity index at station 2 has a greater value than station 1 as a tourist area with diving and snorkeling tourism activities, at station 2 there are more types or genus of reef fish, compared to station 1.

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Importance of Mangroves, Seagrass Beds and the Shallow Coral Reef as a Nursery for Important Coral Reef Fishes, Using a Visual Census Technique

Estuarine Coastal and Shelf Science ◽

10.1006/ecss.2000.0617 ◽

2000 ◽

Vol 51 (1) ◽

pp. 31-44 ◽

Cited By ~ 306

Author(s):

I. Nagelkerken ◽

G. van der Velde ◽

M.W. Gorissen ◽

G.J. Meijer ◽

T. Van't Hof ◽

...

Keyword(s):

Coral Reef ◽

Reef Fishes ◽

Coral Reef Fishes ◽

Seagrass Beds ◽

Visual Census

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Fluktuasi Ikan Karang di Kawasan Konservasi Laut Daerah Gili Sulat dan Gili Lawang, Lombok Timur

Journal of Marine Research ◽

10.14710/jmr.v9i2.26894 ◽

2020 ◽

Vol 9 (2) ◽

pp. 175-180

Author(s):

Diaz Adiyoga ◽

Retno Hartati ◽

Wilis Ari Setyati

Keyword(s):

Reef Fish ◽

Marine Protected Area ◽

Reef Fishes ◽

Line Transect ◽

Coral Reef Ecosystem ◽

Visual Census ◽

The Core ◽

Average Abundance ◽

Reef Ecosystem ◽

Roll Out

ABSTRAK: Keanekaragaman ekosistem pesisir dan laut yang terdapat di Gili Sulat Gili Lawang merupakan salah satu sumberdaya yang penting untuk dilindungi mengingat besarnya ketergantungan masyarakat terhadap ekosistem tersebut. Ekosistem terumbu karang adalah salah satu ekosistem penting di Gili Sulat dan Gili Lawang yang menjadikan ikan dan biota lainnya sebagai tempat tinggal maupun mencari makan. kondisi terumbu karang sangat mempengaruhi kekayaan dan kelimpahan ikan karang. Jika kondisi terumbu karang baik maka kelimpahan ikannya tinggi, begitu pula sebaliknya. Penelitian kelimpahan ikan karang dilakukan pada 14-21 November 2018 di Kawasan Konservasi Laut Daerah Gili Sulat dan Gili Lawang. Pengambilan data menggunakan metode sensus visual untuk ikan karang di kedalaman 8-10 meter dengan 3 buah transek sepanjang 50 meter sejajar dengan garis pantai. Berdasarkan hasil penelitian yang dilakukan di Kawasan Konservasi Laut Daerah Gili Sulat dan Gili Lawang kelimpahan ikan karang, rata – rata nilai kelimpahan ikan karang di zona pemanfaatan paling tinggi yaitu 621 ind/ha, paling rendah pada zona inti sebesar 615 ind/ha dan zona perikanan berkelanjutan sebesar 616 ind/ha ABSTRACT: The diversity of coastal and marine ecosystems found on Gili Sulat Gili Lawang is one of the important resources to protect given the large dependence of the community on these ecosystems. The coral reef ecosystem is one of the important ecosystems on Gili Sulat and Gili Lawang which makes fish and other biota as a place to live or find food. the condition of coral reefs greatly affects the wealth and abundance of reef fish. This research was conducted in November 14-21, 2018. Collecting data of reef fishes abundance using visual census method in 8-10 meter depth, use 3 pieces line transect with 50 meters long an roll out the transect along the shoreline. Based on the results of research conducted in Gili Sulat and Gili Lawang the Marine Protected Area reef fish abundance, the average abundance of reef fish in the utilization zone is highest at 621 ind / ha, the lowest in the core zone is 615 ind / ha and the fishing zone sustainable of 616 ind / ha

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