Jurnal Kelautan: Indonesian Journal of Marine Science and Technology
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BIODIVERSITAS IKAN KARANG DI WILAYAH BENTANG LAUT LESSER SUNDA BANDA (KAB. FLORES TIMUR, ALOR DAN MALUKU BARAT DAYA), INDONESIA
No full textSebanyak 62 titik penyelaman dilakukan untuk memberi gambaran mengenai ikan karang yang terdapat di wilayah perbatasan Propinsi NTT dan Maluku di Indonesia. Tutupan karang hidup menunjukan umumnya kondisi tutupan karang berada pada kategori baik dengan nilai rata-rata 62,51%. Ikan karang yang ditemukan dalam survei ini terdiri dari 468 spesies dalam 47 Famili ikan karang dimana biomassa ikan karang tertinggi terdapat Kab. MBD (Rata-rata 12.476,32 Kg/Ha) sedangkan yang terendah terdapat di Kab. Flores Timur (rata-rata 652,83 Kg/Ha). Nilai Kelimpahan ikan karang tertinggi terdapat di Kab. MBD (rata-rata 13.308 Ind/Ha) dan yang terendah terdapat di Kab. Flores Timur (rata-rata 1.502.23 Ind/Ha). Struktur komunitas ikan karang berdasarkan indeks shanon-weinner (H’) berada kategori sedang, nilai indeks keseragaman (E) masuk kategori labil dan nilai dominansi (C) masuk dominansi rendah sehingga ekosistem masih dalam kondisi baik. Kesamaan spesies ikan karang menggunakan hasil cluster analysis pada taraf penskalaan 66,37 % dan MDS (Multi Dimensional Scalling) mengelompokkan ikan karang kedalam 2 grup yaitu ikan karang di wilayah Kab. Alor dan Flores Timur dan Kabupaten Maluku Barat Daya di kolompok lainnya. Hasil dari analisis klatser dan MDS memperlihatkan Kab. Alor dan Flores timur di Provinsi NTT yang masuk wilayah geografis Lesser Sunda memiliki perbedaan ikan karang dengan Kab. Maluku Barat Daya di Provinsi Maluku yang secara geografis masuk area Banda seascapes. Secara keseluruhan ikan karang di Kab. MBD memiliki potensi yang sangat tinggi dilihat dari kelimpahan, biomasa dan nilai ekologi lainnya. Lokasi ini bisa dikembangkan menjadi sumber protein hewani yang potensial bagi masyarakat disana maupun tingkat nasional.Kata kunci: Ikan karang, Biomassa, kelimpahan, Lesser sunda, Flores Timur, Alor, Maluku Barat Daya. REEF FISHES BIODIVERSITY OF LESSER SUNDA-BANDA SEASCAPE (EAST FLORES, ALOR AND SOUTH WEST MALUKU DISTRICT) IN INDONESIAABSTRACT A total of 62 dive sites were made to provide an overview of reef fish found in the border region of the Province of NTT and Maluku in Indonesia. Live coral cover shows the general condition of the coral cover is in good category with an average value of 62.51%. Reef fish found in this survey consists of 468 species in 47 Famili reef fish reef where fish biomass is highest Kab. MBD (average 12.476,32 kg.ha-1), while the lowest was in the district. East Flores (an average of 652,83 kg.ha-1). The value of reef fish abundance is highest in the district MBD (average 13.308 ind.ha-1) and the lowest was in the district East Flores (average 1.502,23 ind.ha-1). Reef fish community structure based-weinner Shannon index (H') was the medium category, evenness indice value (E) in the category volatile and the value of dominance (C) enters a low dominance so that the ecosystem is still in good condition. The similarity of species of reef fish using cluster analysis results at the level of scaling 66.37% and MDS (Multi Dimensional Scaling) breaks down into two groups of reef fish that reef fish in the district Alor and East Florest and district of Southwest Maluku in other group. Results of the cluster analysis and MDS showed Alor and East Flores regency in NTT Prvince incoming Lesser Sunda seascapes have different reef fish by the District of Southwest Maluku in Maluku Province incoming Sunda Banda seascapes. Overall reef fish in the district. MBD has a very high potential views of abundance, biomass and other ecological values. This location can be developed into a potential source of animal protein for the people there as well as national level. Keywords: Reef fishes, biomass, abundance, Lesser Sunda, sunda banda seascap
PEMANTAUN KONDISI INVERTEBRATA MENGGUNAKAN METODE REEF CHECK, DI PERAIRAN SELAT SEMPU, KABUPATEN MALANG
No full textReef Check merupakan sebuah organisasi yang didedikasikan untuk konservasi ekosistem terumbu karang dengan menggunakan metode pemantauan ekosistem terumbu karang dan lingkungan. Teknik yang digunakan sangat sederhana serta datanya dapat dipastikan kuat secara ilmiah. Data yang didapat berupa perhitungan penutupan jenis substrat, ikan, invertebrata, spesies langka dan dampak kerusakan. Invertebrata merupakan hewan bertulang belakang yang memiliki peranan penting dalam ekosistem terumbu karang. Data invertebrata yang diambil di lapang merupakan spesies ekonomis penting yang ada di Perairan Sendang Biru. Lokasi penelitian berada di wilayah Perairan Sendang Biru, Malang Selatan. Dilakukan pengambilan data di 4 stasiun pengamatan yakni, Teluk Semut 1, Teluk Semut 2, Fish Apartment, dan Watu Meja agar dapat dilakukan adanya perbandingan kelimpahan. Metode penelitian dengan menggunakan metode transek sabuk sejauh 100 m pada 4 stasiun, dilakukan pengamatan dengan pola zig-zag dengan 5 kali pengulangan. Hasil dari monitoring 4 stasiun ini terdapat 2 ekor invertebrata Diadema urchin pada stasiun Teluk Semut 1 dan Teluk Semut 2, 3 ekor invertebrata Pencil urchin pada stasiun 3Fish Apartment, dan 2 ekor Kima dengan besar 10-20 cm pada stasiun Fish Apartment dan Watu Meja. Ketiga spesies invertebrata diatas mewakili semua invertebrata yang ditemukan di lokasi penelitian. Sedikitnya jumlah kelimpahan invertebrata yang ditemukan tersebut sebanding dengan kondisi kesehatan terumbu karang yang kurang baik dan rendahnya jumlah biota pada lokasi tersebut. Kondisi kesehatan karang yang rusak diakibatkan adanya aktivitas perikanan, bleaching, dan penyakit karang. Kegiatan monitoring mengenai invertebrata di daerah tersebut perlu dilakukan kembali secara berkala agar dapat mengetahui kondisi perairan tersebut dengan adanya kelimpahan pada invertebrata. Kata kunci: Invertebrata, Reef Check, Selat Sempu INVERTEBRATE MONITORING USING REEF CHECK METHOD IN SELAT SEMPU WATERS, MALANG ABSTRACTReef Check is an organization which dedicated to the conservation of coral reef ecosystems by using monitoring coral reef ecosystems and the environment method. The technique was simple and can be done by every one who had scientific. The data collected is the calculation of the cover substrates, fish, invertebrates, rare species and damage Invertebrates are vertebrates that have an important role in the ecosystem of coral reefs. invertebrates data which taken in the field is an economically important species in Sendang Biru. The data collected is the calculation of the closing type of substrates, fish, invertebrates, rare species and impacts that occur by looking at the research site conditions. The research location is in the area of Sendang Biru, South Malang. The data collection is done in four station in order to compare and get a calculation of the observations. The research method using belt transect as far as 100m on 4 stations, the observation done with a zig-zag pattern and visually observe the coral reff. Data collection was performed in five repetitions. The Result oh the monitoring in 4 stations, show 2 individual Diadema urchin on the Teluk Semut 1 and 2, 3 Individual of Pencil urchin on Fish Apartment station, and 2 Kima with a size 10-20cm on Fish Apartment and Watu Meja station. The least amount of invertebrate discovered show the ecological balance between the coral cover and fish populayion. The ecological condition of corals were damaged due to their fishing activities, bleaching and coral disease. Monitoring activities of the invertebrates in the area needs to be continue in order to determine the condition of these area. Keywords : Invetebrate, Reef Check, Selat Semp
IDENTIFIKASI PROFIL DASAR LAUT MENGGUNAKAN INSTRUMEN SIDE SCAN SONAR DENGAN METODE BEAM PATTERN DISCRETE-EQUI-SPACED UNSHADED LINE ARRAY
No full textLaut Punggur merupakan laut yang terletak di Batam, Kepulauan Riau yang mempunyai beragam habitat objek,dan bentuk struktur bawah laut yang memiliki dinamika laut yang sangat tinggi. Side scan sonar (SSS) merupakan instrumen pengembangan sistem sonar yang mampu menunjukkan dalam gambar dua dimensional permukaan dasar laut dengan kondisi kontur, topografi, dan target secara bersamaan. Metode Beam Pattern Discrete-Equi-Spaced Unshaded Line Array digunakan untuk menghitung beam pattern dua dimensi yang tergantung pada sudut dari gelombang suara yang masuk dari sumbu array yang diterima tergantung pada sudut di mana sinar suara pada array. Penelitian ini dilakukan pada Desember 2016 di laut Punggur,Batam, Kepulauan Riau-Indonesia, dengan koordinat 104 ° 08,7102 E dan 1° 03,2448 N sampai 1 ° 03.3977 N dan 104 ° 08,8133 E, menggunakan instrumen Side Scan Sonar C-Max CM2 Tow fish dengan frekuensi 325 kHz. Hasil yang diperoleh dari perekaman terdapat 7 target, dan Beam pattern dari metode Beam Discrete-Equi-Spaced Unshaded Line Array target 4 memiliki nilai tertinggi pada directivity Pattern yaitu 21.08 dB. Hasil model beam pattern ini memiliki nilai pusat pada incidence angle (o) terhadap Directivity pattern (dB) tidak berada di nilai 0 ataupun pada pusat beam pattern yang dihasilkan pada target 6 dengan nilai incident angle -1.5 o dan 1.5o mengalami penurunan hingga -40 dB. Karakteristik sedimen dasar perairan di laut punggur ditemukan lebih banyak pasir. Hasil metode Beam Discrete-Equi-Spaced Unshaded Line Array ditemukan bangkai kapal tenggelam.Kata Kunci: Side Scan Sonar, Beam Pattern Discrete-Equi-Spaced Unshaded Line Array, Incidence angle, Directivity pattern IDENTIFICATION OF SEABED PROFILE USING SIDE SCAN SONAR INSTRUMENT WITH PATTERN DISCRETE-EQUI-SPACED UNSHADED LINE ARRAY METHODRiau Islands is an island that has a variety of habitat objects, and forms of submarine structures that have a very high ocean dynamics, Punggur Sea is the sea which was a sea of Riau Island in Indonesia. Side scan sonar (SSS) is an instrument based on sonar system wich capable of showing the image of two-dimensional surface of the seabed with contour conditions, topography, and the underwater target simultaneously. Beam Pattern Discrete-equispaced unshaded Line Array Method is used to compute the two-dimensional beam pattern which depends on the angle of the incoming sound waves from the axis of the array are acceptable depending on the angle at which the sound beam array. This research was conducted in December 2016 in the sea Punggur, Batam, Riau Islands-Indonesia, with coordinate system 104 ° 08,7102 E and 1° 03,2448 N until 1 ° 03.3977N and 104 ° 08,8133 E, using Side Scan Sonar Tow C-Max CM2 fish instruments with a frequency of 325 kHz. The Results obtained from the recording there are 7 targets, and Beam pattern of Discrete-Beam method Equi-Spaced unshaded Line Array in targets 4 have the highest value in the Pattern is 21:08 dB directivity. The results of the model's beam pattern have anaxis value at the incidence angle (o) of the directivity pattern (dB) are not on the value 0 or the central beam pattern generated on the target 6 with incident angle -1.5 o and 1.5o have declined by -40 dB. Characteristics of bottom sediment in the sea waters Punggur found more sand.Discrete-method result Beam Equi-Spaced unshaded Line Array discovered the sunken wreck. Keywords: Side Scan Sonar, Beam Pattern Discrete-Equi-Spaced Unshaded Line Array, Incidence angle, Directivity patter
Coral reefs eco tourism sustainability management In the Gili Labak Island using rapfish method
No full textThe purpose of this research is to give direction of management of Gili Labak Island by considering multidimensional factors. The method used is Rapfish. This method uses the ecological, resource, economic, social, legal and institutional dimensions. Rapfish Gili Labak's analysis results for the ecological dimension show a value of 62.3 in a fairly sustainable category. The resource dimension shows a value of 63.07 in fairly sustainable categories. The economic dimension shows the value of 10.15 in the unsustainable category. the social dimension of value of 17.8 in the unsustainable category. Legal dimensions and institutional values of 5.36 in non-sustainable categories. Multidimensional analysis results show sustainability index in less sustainable category (value 34,24). After interference is increased it becomes quite continuous (value 74.99). This interference is described in the recommendations. Recommendations are made on the lesser dimensions, namely the legal and institutional fields, the economic field and the social field
SCREENING OF TOXIC MARINE NITZSCHIA SPECIES (BACILLARIOPHYCEAE) IN MALAYSIA
No full textAmnesic Shellfish Poisoning (ASP) is a type of intoxication caused by the neurotoxin domoic acid (DA). The diatom genus Nitzschia is capable of producing this toxin. Screening for the presence of toxic Nitzschia spp. was carried out at various estuaries in Malaysia. Nitzschia-like cells were isolated and established into clonal cultures. Late stationary phase of cultures were harvested and tested for toxin production using HPLC. Toxin production and compound was verified by LC-MS. From the analyses, at least three cultures were detected with DA, while the rest of the cultures did not show detectable amounts of DA. The localities of the toxic species are Johor and Sabah. Here we conclude that toxic Nitzschia species are present in Malaysian water.Keywords: diatom, estuary, intoxication, safety, toxic
Dampak Pemutihan Karang Tahun 2016 Terhadap Ekosistem Terumbu Karang: Studi Kasus Di TWP Gili Matra (Gili Air, Gili Meno dan Gili Trawangan) Provinsi NTB Coral Bleaching Impact in 2016 Towards Coral Reef Ecosystem: Case Studies TWP Gili Matra (Gili Air,
No full textABSTRACTIncreased sea surface temperatures due to global warming that occurred from the early to mid 2016 caused of coral bleaching in several locations in TWP Gili Matra. Observations of coral bleaching obtained from coral colonies compotition affected by bleaching (50%), white (18%), death (1%) and was not affected (31%). These implications resulting decline in coral cover but not significant (F (1,013) = 0.333, p 0.05) from 23,43% ± 2,61 SE in 2012 to 18,48% ± 4,14 SE in 2016 and a significant decrease (P (58,06) = 3,8e-06) recruitment of coral (coral Juvenil) from 6,66 ind.m-1 ± 1,04 SE in 2012 to 1,41 ind.m-1 ± 0,16 SE in 2016. the other impact is a significant reduction (P(20.84) = 0,00053, p 0,001) the abundance of reef fish from 28.733,26 ind.ha-1 ± 3.757,89 SE in 2012 to 11.431,18 ind.ha-1 ± 702,53 SE in 2016 and a decline in the biomass of reef fish but not significant (F (0,58) = 0,46, P 0.05) from 506,56 kg.ha-1 ± 99,05 SE in 2012 to 438,41 kg.ha-1 ± 45,69 SE in 2016. The decline of coral recruitment resulted in the recovery of the affected areas bleaching becomes slow because of the juvenile new coral mostly dead. The second impact of bleaching is an abundance of fish decrease, indicating that is available only fish big size (adult) and very less of small fishes, including juvenile. Keywords: global warming, coral bleaching, coral cover, reef fishe
PENGAMATAN KADAR SENYAWA POLISIKLIK AROMATIK HIDROKARBON (PAH): (BENZO [a] PYREN, BENZO [a] ANTRASEN, BENZO [b] FLUORANTEN, DI-BENZO [a,h] ANTRASEN, DAN BENZO [g,h,i] PERYLEN) DALAM AIR LAUT DI TELUK JAKARTA
No full textPengukuran kadar senyawa polisiklik aromatik hidrokarbon (PAH): Benzo[a]Pyren, Benzo[a] Antrasen, Benzo[b]fluoranten, Di-benzo[a,h]Antrasen, dan Benzo[g,h,i]Perylen dalam air laut di Teluk Jakarta telah dilakukan pada bulan Maret, Mei 2013, Maret dan Juli 2011. Tujuannya adalah untuk menentukan tingkat pencemaran kelima senyawa PAH tersebut dalam air laut dalam kaitannya dengan perlindungan biota laut. Contoh air laut diambil dengan menggunakan alat pengambil contoh air (water sampler) di 12 stasiun penelitian. Posisi stasiun ditentukan dengan menggunakan GPS. Contoh dianalisis dengan menggunakan khromatografi gas. Hasil penelitian menunjukkan kadar ke lima senyawa tersebut pada bulan Maret lebih tinggi dibandingkan dengan Mei dan Juli. Kadar kelima senyawa tersebut telah melebihi nilai ambang batas yang aman untuk kehidupan biota laut. Keyword: Teluk Jakarta, air laut, polisiklik aromatik hidrokarbon, pengamatanABSTRACTMeasurement of polycyclic aromatic hydrocarbons (PAHs) compound concentration: Benzo[a] Pyrene, Benzo[a]Anthracene, Benzo[b]Fluoranthene, Di-Benzo[a,h]Anthracene, and Benzo [g,h,i] Perylene in seawater of Jakarta Bay were carried out in March, May 2013, March and April 2011. The purpose of this research was to determined the level of pollution of the five PAH compound in seawater in relation to the protection of marine organisms. Sea water samples have taken by using a water sampler at 12 research stations. Station positions is determined by using Geographic Position System (GPS). All samples analyzed by using Gas Chromatography. The results of this research showed that the concentration of that fifth PAH compounds in seawater in March were higher compared to May and July. The content of that fifth compound has exceeded the safely threshold value for marine organism life. Keyword: Jakarta Bay, seawater, polycyclic aromatic hydrocarbon, observatio