scholarly journals Temporal of reef fish communities in the coastal water of Krueng Raya, Aceh Besar Regency, Indonesia

2019 ◽  
Vol 5 (1) ◽  
pp. 11-17
Author(s):  
Maria Ulfah ◽  
Siti N. Fajri ◽  
Muhammad Nasir ◽  
Sri Agustina ◽  
Syahrul Purnawan
Keyword(s):  
Coral Reef ◽  
Reef Fish ◽  
Coastal Waters ◽  
Coral Reef Ecosystem ◽  
Average Amount ◽  
Visual Census ◽  
Severe Condition ◽  
Two Factors ◽  
Conservation Plan ◽  
Reef Ecosystem

Krueng Raya waters have a big potency on coral reef fish; However, there was no study was conducted to document this biodiversity. This data are crucial for the conservation plan. Therefore, the objective of the study was to examine the community structure of reef fish in the Krueng Raya coastal waters, Mesjid Raya Subdistrict, Aceh Besar, Indonesia. The sampling was conducted from January 2014 to December  2016. The data were collected at three stations by the Visual Census method with a depth of 3-4 meters. The research found the average amount of reef fish was 1743 individuals that were consisted of 93 species and comprised of 26 families. The Families dominating were Pomacentridae, Acanthuridae, Chaetodontidae, and Labridae. The distribution level of reef fish individually was influenced by the environmental conditions of the coral reef ecosystem. The severe condition of the coral ecosystem in the Krueng Raya coastal waters was caused by two factors. Firstly, fishing activities of the locals and tourists who deliberately stepping on the coral colonies and using unfriendly tools to catch the fish (speargun). Another factor was the occurrence of coral bleaching in 2016, of which almost 80% of the coral ecosystem in the Krueng Raya coastal waters was exposed to this phenomenon (bleaching).Keywords: Reef Fish, Acanthurida,  Communities Structure, Krueng Raya

scholarly journals Variasi Temporal Kelompok Ikan Terumbu Karang di Pulau Tidung Kecil Menggunakan eDNA Metabarkoding dan Sensus Visual

2021 ◽  
Vol 24 (3) ◽  
pp. 283-290
Author(s):  
Muhammad Fahmi Zuhdi ◽  
Hawis Madduppa ◽  
Neviaty P. Zamani
Keyword(s):  
Coral Reef ◽  
Reef Fish ◽  
Coral Reef Fish ◽  
Coral Reef Ecosystem ◽  
Wet Season ◽  
Visual Census ◽  
Underwater Visual Census ◽  
Natural Factors ◽  
Fish Group ◽  
Reef Ecosystem

Coral reef fish are play key role in coral reef ecosystem. The presence of reef fish affected by antrophogenic and natural factors, such seasonal changes. This study aimed to asess the temporal variation of coral reef fish group in Tidung Kecil Island using eDNA metabarcoding and Undewater Visual Census. This research was conducted at December 2019 (West season) and August 2020 (East season). Target group are dominated in west season (64.1%) and east season (59.25%) using eDNA metabarcoding. While, major group fish are the highest relative abundance in both season by using Underwater Visual Census. Family Carangidae are the highest species richness (15 species) in wet season and Serranidae (3 species) in east season, respectively.  Futhermore, famili Pomacentridae are the most richness species in west and east seasons 10 and 11 species respectively. Thus, it can be concluded these two methods are effective for monitoring structure or abundance of coral reef fish based on seasonal variation. Ikan karang menjadi indikator dalam menilai keanekaragaman hayati di ekosistem tersebut. Keberadaan ikan di ekosistem terumbu karang dapat dipengaruhi oleh faktor antropogenik dan faktor alam salah satunya perubahan musim. Penelitian ini bertujuan untuk menganalisis kelimpahan kelompok ikan terumbu karang di Pulau Tidung Kecil menggunakan eDNA metabarkoding dan Sensus Visual. Pengambilan data dilakukan pada bulan Desember 2019 (musim barat) dan Agustus 2020 (musim timur). Ikan target mendominasi pada musim barat dan timur dengan persentase sebesar 64.11% dan 59.25%. Sensus visual berhasil mendeteksi ikan mayor dengan persentase tertinggi 62.5% di musim barat dan 82.8% di musim timur. Famili Carangidae merupakan famili dengan jumlah spesies tertinggi di musim barat (15 species) dan Siganidae di musim timur menggunakan eDNA metabarkoding (3 species). Hasil UVC menunjukkan famili Pomcentridae memilki jumlah spesies tertinggi di kedua musim (11 dan 10 spesies) menggundakan sensus visual. Dapat disimpulkan bahwa kedua metode tersebut dapat menjadi pendekatan dalam monitoring struktur atau kelimpahan ikan terumbu karang berdasarkan musim. 

scholarly journals CONDITION OF CORAL AND REEF FISH IN THE LOCATION OF FISH CATCHING USING DYNAMITE FISHING IN KAPOPOSANG WATER PARK AND THE SURROUNDING SEA

2020 ◽  
Vol 6 (1) ◽  
pp. 1
Author(s):  
Mahmudin Mahmudin ◽  
Chair Rani ◽  
Hamzah Hamzah
Keyword(s):  
Coral Reef ◽  
Reef Fish ◽  
Coral Cover ◽  
Low Cost ◽  
Fish Abundance ◽  
Live Coral ◽  
Coral Reef Ecosystem ◽  
Control Location ◽  
Target Fish ◽  
Reef Ecosystem

Dynamite fishing is one of the causes of damage to the coral reef ecosystem in Indonesia. Fishing activities using explosives (dynamite fishing) occur because of the desire of fishermen to get a lot of catch with low cost in a short time. Kapoposang Water Park (WP) is a region rich in marine biological resources. However, dynamite fishing activities which are still found within the area have caused the coral reef ecosystem to be severely damaged. The results showed a lower difference in the percentage of live coral cover at dynamite fishing locations (DF1, DF2) compared to control locations (K1, K2). In addition, the highest average values of coral fish abundance were found at locations K1, DF1, and DF2. Conversely, the results of the analysis found the lowest fish abundance at the K2 location. Different from the average number of reef fish species that were higher at the control location (K1, K2) compared to dynamite fishing locations (DF1, DF2). For the target fish biomass there is no real difference between the control location and dynamite fishing.

scholarly journals Potassium Cyanide (KCN) Content in Coral Reefs and Its Effect on The Abundance of Indicator-Fishes in The Anambas Islands

2021 ◽  
Vol 5 (1) ◽  
pp. 214
Author(s):  
Rizki Dimas Permana ◽  
Sunarto Sunarto ◽  
Syawalludin Alisyahbana Harahap ◽  
Indah Riyantini ◽  
Yuwanda Ilham
Keyword(s):  
Coral Reef ◽  
Negative Correlation ◽  
Protected Area ◽  
Marine Protected Area ◽  
Potassium Cyanide ◽  
Distilled Water ◽  
Coral Reef Ecosystem ◽  
Visual Census ◽  
Underwater Visual Census ◽  
Reef Ecosystem

The coral reef ecosystem has been continuously degraded in various parts of Indonesia, including the Anambas Islands. This research aimed to discover the content of Potassium Cyanide (KCN) accumulated on corals and the effect on indicator fishes abundance in the Anambas Islands. This research was conducted at 25 observation stations in the Anambas Islands National Marine Protected Area. The potassium cyanide (KCN) content was tested with the principle of titration and distillation. The coral samples used ranged from 10-20 g diluted in 100-200 ml distilled water. The method used to determine the abundance of indicator fish was underwater visual census or UVC, which recorded fish in every station. This research recorded 307 fish individuals from 14 species of the Chaetodontidae family. Potassium Cyanide's content on corals was high ranging from 0,009-0,032 mg/L with an average 0,0205 mg/L. We concluded that there was a negative correlation between the content of Potassium Cyanide  (KCN) on corals and indicator fishes abundance, which means the higher the Potassium Cyanide content (KCN) is on corals, the lower the indicator fishes abundance will point out.

scholarly journals DISTRIBUSI KARANG DAN IKAN KARANG DI KAWASAN REEF BALL TELUK BUYAT KABUPATEN MINAHASA TENGGARA

2012 ◽  
Vol 8 (1) ◽  
pp. 28 ◽  
Author(s):  
Indri Manembu ◽  
Luky Adrianto ◽  
Dietriech G Bengen ◽  
Ferdinan Yulianda
Keyword(s):  
Coral Reef ◽  
Reef Fish ◽  
Economic Value ◽  
Coastal Communities ◽  
Coral Reef Ecosystem ◽  
Goods And Services ◽  
Bay Area ◽  
The Family ◽  
Surrounding Areas ◽  
Reef Ecosystem

Penempatan reef ball di perairan Teluk Buyat dan sekitarnya telah dilakukan pada tahun 1999 oleh PT. Newmont Minahasa Raya. Tujuan penempatan reef ball untuk membangun habitat berbagai biota yang berasosiasi dengan karang sehingga dapat meningkatkan populasi ikan ekonomis penting. Kehadiran ikan karang pada reef ball sangat penting secara ekologis dan ekonomis. Penurunan kualitas terumbu berarti hilangnya nilai ekonomi barang dan jasa, serta hilangnya jaminan makanan dan pekerjaan untuk masyarakat pesisir, yang umumnya hidup dalam kemiskinan. Secara keseluruan, komposisi spesies ikan yang ditemukan di reef ball terdiri dari 19 famili, 34 genus, 50 spesies dan 290 individu, yang tertinggi dihuni oleh jenis dari famili Mullidae. Seiring dengan bertambahnya waktu dan usia reef ball, beberapa spesies terlihat sudah menetap seperti Lutjanus kasmira, dan beberapa spesies dari famili Acanthuridae. Keberadaan reef ball membantu terbentuknya ekosistem terumbu karang yang baru dan meningkatkan kesuburan perairan, sehingga lebih meningkatkan keberadaan komposisi ikan karang, yang pada akhirnya meningkatkan pendapatan nelayan dari hasil tangkapan ikan karang.Kata kunci: Reef ball, karang batu, ikan karang Distribution of Coral Reefs and Fish in Buyat Bay Area Reef Ball Southeast Minahasa Regency The placement of reef ball in Buyat Bay and surrounding areas have been carried out since 1999 by PT. Newmont Minahasa Raya. The goal of this placement was to build a habitat for many biota associated with reef thus may improve economically important fish populations. The presence of reef fish on the reef ball is indispensable ecologically and economically. Furthermore, the degradation of reefs might cause the disappearance of economic value of goods and services, as well as the disappearance of food security and employment for coastal communities, who generally live in poverty. Overall, the composition of fish species found in the reef ball consists of 19 families, 34 genera, 50 species and 290 individuals, the highest inhabited by species of the family Mullidae. As time went by and the increase of reef ball age, some species seem have settled down such as Lutjanus kasmira, and several species of the Acanthuridae family. In addition, the presence of reef ball helps the formation of a new coral reef ecosystem and increase the fertility of waters, therefore enhancing the presence of reef fish composition, which might increases the income of fishermen. Keywords: Reef ball, coral reef, reef fish  

scholarly journals KESESUAIAN EKOSISTEM TERUMBU KARANG UNTUK KEGIATAN WISATA SELAM DI NUSA LEMBONGAN, BALI

2021 ◽  
Vol 15 (1) ◽  
pp. 1
Author(s):  
Made Ayu Pratiwi ◽  
Ni Made Ernawati ◽  
Ni Putu Putri Wijayanti
Keyword(s):  
Coral Reef ◽  
Coral Reefs ◽  
Reef Fish ◽  
Human Activities ◽  
Economic Benefits ◽  
Coral Community ◽  
Observation Point ◽  
Coral Reef Ecosystem ◽  
Suitability Index ◽  
Reef Ecosystem

Nusa Lembongan islands, Bali have a potential of coral reef diversity. Coral reefs have both ecological and high economic potential so that they are widely used. The economic benefits of coral reefs make these ecosystems very vulnerable to pressure from human activities. One of these human activities is the use of coral reefs in diving tourism activities. This research aimed to determine suitability and carrying capacity of coral reef ecosystem on Nusa Lembongan Island so that it can be recommended to manage coral reef ecosystem strategies to support the use of diving tourism. This study was conducted on six dive sites as observation points Observations on coral reef ecosystems were carried out using the intercept transect (LIT) method, and reef fish observation was carried out using the fish visual census method. Water quality sampling will be done in situ. Diving suitability was carried out by estimating the tourist suitability index (IKW) of six parameters, namely the brightness of the waters, coral community cover, coral life form, reef fish species, coral reef depth and current. The tourism suitability index value for the diving tourism category obtained was 74.07% (Jack Mangrove); 57.41% (Crystal Bay); and 61.11% (Manta Bay). The value for each observation point is included in the appropriate category of 50% -75%. It can be interpreted, that all observation points which are dive sites in Nusa Lembongan have supported diving tourism activities.Keywords: Tourism Suitability Index; Diving; Nusa lembongan.

scholarly journals Kelimpahan dan Biomassa Ikan Karang Famili Scaridae pada Ekosistem Terumbu Karang di Perairan Pulau Kembar, Karimunjawa, Jepara

2020 ◽  
Vol 9 (2) ◽  
pp. 159-166
Author(s):  
Fran Ciputra Tambunan ◽  
Munasik Munasik ◽  
Agus Trianto
Keyword(s):  
Coral Reef ◽  
Reef Fish ◽  
Coral Cover ◽  
Fish Biomass ◽  
Hard Coral ◽  
Coral Reef Ecosystem ◽  
The Family ◽  
Coral Fish ◽  
Hard Coral Cover ◽  
Reef Ecosystem

ABSTRAK : Ikan kakatua merupakan salah satu ikan karang yang dapat membantu kehidupan pada ekosistem terumbu karang. Scaridae mengumpulkan berbagai spesies ganggang dengan cara memakan algae pendek yang menutupi substrat karang sehingga dapat mempengaruhi pertumbuhan terumbu karang. Sebaran Scaridae sangat ditentukan oleh kondisi dan variasi habitat terumbu karang. Penelitian ini bertujuan untuk mengetahui kelimpahan dan biomassa dari ikan Famili Scaridae. Penelitian dilaksanakan pada bulan Oktober 2018 di Perairan Pulau Kembar, Karimunjawa, Jepara. Pengambilan data  ikan karang menggunakan metode UVC dan data substrat terumbu karang diambil menggunakan metode LIT sepanjang 100 meter sejajar garis pantai dengan pengamatan pada dua kedalaman yaitu 3m dan 10m. Berdasarkan hasil penelitian, didapatkan 11.459 individu yang termasuk dalam 49 spesies ikan karang yang berasal dari 14 famili. Ikan karang dari Famili Scaridae ditemukan sebanyak 1059 individu yang termasuk dalam 4 spesies ikan karang yang berasal dari 2 genus. Nilai kelimpahan ikan karang dari Famili Scaridae berkisar antara 48 hingga 204 ind/500m2, kelimpahan terendah berada pada stasiun 1 dan tertinggi berada di stasiun 3.  Nilai biomassa ikan karang dari Famili Scaridae berkisar antara 219,7–2491,7 kg/ha, biomassa terendah berada pada stasiun 1 dan tertinggi berada di stasiun 3.  Berdasarkan hasil penelitian dapat disimpulkan bahawa Pengaruh tutupan karang keras hidup sangat berpengaruh terhadap kelimpahan dan biomassa ikan karang dari Famili Scaridae. ABSTRACT : Parrot fish is one of the reef fish that can help life on the coral reef ecosystem. Scaridae collect various species of algae by eating short algae that cover the coral substrate so that it can affect the growth of coral reefs. Scaridae distribution is highly determined by the condition and variety of coral reef habitats. This study aims to examine the abundance and biomass of Scaridae Family fish. The study was conducted in October 2018 in the waters of the Kembar Islands, Karimunjawa, Jepara. Retrieval of reef fish data using UVC method and coral reef substrate data were taken using the LIT method along 100 meters along the coastline with observations at two depths in 3m and 10. Based on the results, 11,459 individuals were included in 49 species of reef fish originating from 14 families. Coral fish from the Family Scaridae were found as many as 1059 individuals included in 4 species of reef fish originating from 2 genera. The value of coral fish abundance from the Scaridae Family ranges from 48 to 204 ind / 500m2, the lowest abundance is at station 1 and the highest is at station 3. The reef fish biomass value of the Scaridae Family ranges from 219.7 - 2491.7 kg / ha, biomass the lowest is at station 1 and the highest is at station 3. Based on the results of the study it can be concluded that the effect of live hard coral cover is very influential on the abundance and biomass of reef fish from the Scaridae Family.

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

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

scholarly journals Conditions of Coral Reef and Target fish in Waters of Maitara Islands

2020 ◽  
pp. 1-16
Author(s):  
Mohdi Umanahu ◽  
Umar Tangke ◽  
Syahnul Sardi Titaheluw
Keyword(s):  
Coral Reef ◽  
Reef Fish ◽  
Good Condition ◽  
Secondary Data ◽  
Visual Observation ◽  
Survey Method ◽  
Coral Reef Ecosystem ◽  
Target Fish ◽  
Fish Group ◽  
Reef Ecosystem

This research was carried out with a survey method during August 2019 with the aim of knowing the biodiversity of target fish and their potential in the coral reef ecosystem in the waters of Maitara Island, North Maluku Province by collecting primary and secondary data in the form of coral reef conditions (lifeform), fish conditions (diversity, uniformity and dominance) as well as environmental parameter data in the form of temperature, salinity, current velocity, and brightness. The collection of data on the condition of coral reefs and fish was carried out simultaneously, namely 1 dive at each station. Visual census method is used for reef fish data. The results of visual observation of reef fish in the waters of Maitara Island found that there were 13 familyes included in the major fish group consisting of 7 familyes, 1 family of indicator fish and 5 target fish groups. The reef fish found at the observation location of station 1 consisted of 59.3% major fish groups, 24.2% target fish and 16.5% indicator fish and at station 2 reef fish consisted of 62.1 major fish groups. %, target fish is 23.8% and indicator fish is 4.1%. Overall, the results of the visual observations of reef fish showed that major fish were the most dominant, found as much as 66.7% of the target fish groups were 23.9% and indicator fish groups were 9.4%. The lack of presence of indicator fish groups shows that the fertility of the coral reef ecosystem in the waters of Maitara Island is no longer in good condition, because the indicator fish group is a type of fish that indicates good and bad parameters of coral reef conditions in the waters.

scholarly journals DISTRIBUSI SPASIAL IKAN FAMILI SCARIDAE DI PERAIRAN TAMAN NASIONAL BUNAKEN, SULAWESI UTARA

2018 ◽  
Vol 1 (2) ◽  
Author(s):  
Basuki Rachmad
Keyword(s):  
Spatial Distribution ◽  
Coral Reef ◽  
Coral Reefs ◽  
National Park ◽  
Ecological Assessment ◽  
Coral Reef Ecosystem ◽  
Visual Census ◽  
Herbivorous Fishes ◽  
Line Intercept ◽  
Reef Ecosystem

ABSTRAKIkan karang Famili  Scaridae adalah salah satu ikan herbivora yang hidup di ekosistem terumbu karang. Namun keberadaan dan kondisi ikan ini belum banyak diketahui di perairan Taman Nasional Bunaken. Penelitian ini bertujuan untuk mengetahui komposisi dan distribusi ikan famili Scaridae yang berhubungan dengan terumbu karang, di Taman Nasional Bunaken yang dilakukan di tiga pulau pada bulan Februari hingga Mei 2017. Pengamatan ini dilakukan dengan metode sensus visual Line Intercept Transect (LIT) Dalam penelitian ini ditemukan keragaman ikan famili Scaridae terdiri dari 9 spesies, dua spesies ikan yaitu Scarus spirus dan S. niger memiliki distribusi spasial di seluruh perairan. Jenis ikan yang memiliki kelimpahan tertinggi adalah S. gobbhan (110 ind/ha).  Kesamaan spesies dicirikan oleh kecenderungan dari kelompok yang terjadi di perairan Pulau Bunaken yang kerucut. Penilaian ekologi ikan Scaridae menunjukkan bahwa terumbu karang di perairan Taman Nasional Bunaken masih dalam kondisi baik.Kata Kunci: Distribu spasial Scaridae, keanekaragaman, Taman Nasional Bunaken ABSTRACTCoral fishes Scaridae family is one of the herbivorous fishes that live in coral reef ecosystem. But  the existence and condition of this fishes has not been widely known in  of Bunaken National Park waters. This study aims to determine the composition and distribution of Scaridae family associated with coral reefs, in Bunaken National Park conducted at three islands in February to May 2017. The observation is ware made with the visual census method Line Intercept Transect (LIT)  In this study found diversity of Scaridae family consists of 9 species, two species Scarus spirus and S. niger has spatial distribution throughout the waters. S. gobbhan has the highest abundance (110 ind/ha). The similarity of species characterized by the tendency to from groups that occur in the conical Bunaken Island waters. Ecological assessment of the Scaridae fish shows that the coral reefs in the waters of Bunaken National Park are still in good condition.Key Words: Spasial Distributian, Scaridae, diversity, Bunaken National Park

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