Jurnal Ilmu dan Teknologi Kelautan Tropis
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PENGARUH LINGKUNGAN TERHADAP BENTUK PERTUMBUHAN TERUMBU KARANG DI PERAIRAN TELUK LAMPUNG
Get PDFABSTRAKKondisi lingkungan perairan dapat menentukan bentuk pertumbuhan terumbu karang. Penelitian ini dilakukan untuk mengetahui bentuk pertumbuhan karang pada kondisi lingkungan yang berbeda di sekitar perairan Teluk Lampung. Pengamatan dilakukan dengan menggunakan transek kuadrat dengan ukuran (1x1) m2 dan pengolahan data menggunakan software CPCE (Coral Point Count with Excel Extension). Penelitian ini dilakukan pada bulan Juli 2013. Hasil pengamatan menunjukan bahwa bentuk pertumbuhan karang yang dominan pada perairan Teluk Lampung adalah bentuk bercabang dari genus Acropora (ACB), bentuk foliose (CF) dan bentuk massive (CM). Tipe brancing ditemukan di daerah yang memiliki kondisi arus yang lemah dan tingkat kecerahan yang tinggi. Coral foliose ditemukan pada daerah yang arusnya juga lemah dan tingkat kekeruhan rendah. Coral massive ditemukan mendominasi di daerah yang arus dan tingkat kekeruhannya cukup tinggi. Dari hasil ini dapat disimpulkan bahwa kondisi lingkungan perairan dapat mempengaruhi bentuk pertumbuhan terumbu karang di Perairan Teluk Lampung. ABSTRACTWater conditions can determine the life form of coral. This study aimed to determine life form of coral growth in different environmental conditions around Lampung Bay waters. The observation using quadratic transect with size (1x1) m2 and processing data by using CPCE (Coral Point Count with Excel Extension) software. This study was conducted in July 2013. The results showed that the dominant form of coral growth in Lampung Bay waters was branching form of the Acropora genus (ACB), foliose (CF) and massive (CM) forms. Branching types were found in areas with weak current conditions and high brightness levels. Coral foliose were found in areas where the current was also weak and low turbidity. Coral massive domination was found in high level both in current and turbidity. It was concluded that environmental conditions could influence the life form of coral reef in the waters of Lampung Bay
THE EFFECT OF ORGANIC SEDIMENT CONTENT ON CORAL DIVERSITY IN KARIMUNJAWA ISLAND, INDONESIA
Get PDFCoral reef now are under threats due to sedimentation. Fatal effect of organic rich sediment, leading corals mortality. Therefore, the study was conducted to investigate effect of organic sediment content to the coral diversity in Karimunjawa Island, Central Java, Indonesia. Field data was conducted at 6 locations. Three sediment traps were deployed at each sites to measure organic sediment content. Twenty replicated quadrant transects were used to estimate coral density and coral diversity. Analysis of variance (ANOVA) was used to examine the differences of organic sediment content in each station. The linear regression was used to assess the relationship between organic sediment content and coral diversity. Our field result demonstrated that sediment content significantly different between sites with value range from 0.42 mg/800 ml - 1.32 mg/800 ml. Based on the Simson’s Diversity Index, the highest coral diversity found at Alang-alang as site with low sedimentation while the lowest coral diversity was found at Legon Lele as site with high sedimentation. The study shown significant negative correlation between organic sediment content and coral diversity with the coefficient of regression 0.68. This study convinces that disturbance on coral reefs might affect coral diversity in Karimunjawa Island, in addition to other factors such as the influence of human activities, natural disruption and climate change. Keywords: sedimentation, organic, coral, diversity, Karimunjaw
PENDEDERAN UDANG VANAME Litopenaeus vannamei DENGAN TEKNOLOGI BIOFLOK UNTUK MENINGKATKAN PERTUMBUHAN DAN EFISIENSI PAKAN
Get PDFBudidaya udang vaname Litopenaeus vannamei di karamba jaring apung (KJA) laut mempunyai prospek yang sangat bagus untuk dikembangkan. Budidaya udang di laut membutuhkan tokolan yang berkualitas dan berkuantitas. Tokolan tersebut diperoleh melalui tahap pendederan menggunakan sistem intensif. Namun sistem tersebut memiliki beberapa kendala karena menggunakan padat tebar tinggi dan pemberian jumlah pakan meningkat. Pakan yang tidak termakan dan hasil eksresi metabolik udang, terakumulasi dalam air sehingga konsentrasi senyawa nitrogen terutama ammonia dalam air meningkat. Saat ini, sistem bioflok (BFT-Bio-flocs technology) mulai dikembangkan untuk mengurangi limbah kegiatan budidaya. Tujuan penelitian ini adalah untuk pendederan udang vaname L. vannamei dengan sistem bioflok untuk meningkatkan pertumbuhan dan efisiensi pakan. Rancangan percobaan yang digunakan adalah rancangan acak lengkap (RAL) dengan 2 perlakuan dan 3 ulangan. Hasil penelitian menunjukan bahwa perlakuan sistem bioflok protein 40% memiliki laju pertumbuhan yang lebih tinggi (9,85%) dan efesiensi pakan (37,33%) dibandingkan kontrol. Kegiatan pendederan udang vaname dengan sistem bioflok dapat memberikan pertumbuhan dan efesiensi pakan yang lebih baik dan berbeda signifikan dibandingkan kontrol (P<0,05)
KLASIFIKASI MANGROVE BERBASIS OBJEK DAN PIKSEL MENGGUNAKAN CITRA SENTINEL-2B DI SUNGAI LIONG, BENGKALIS, PROVINSI RIAU
Get PDFABSTRAK Penelitian pemetaan mangrove di Sungai Liong, Bengkalis Provinsi Riau sangat terbatas, sehingga ketersediaan data spasial di wilayah ini masih sangat terbatas. Pemanfaatan citra satelit dapat dijadikan alternatif dalam menyediakan data spasial secara efektif dan efesien. Penelitian ini bertujuan untuk memetakan mangrove sampai tingkat komunitas menggunakan citra sentinel 2B dengan metode klasifikasi berbasis objek/OBIA dan membandingkannya dengan teknik klasifikasi berbasis piksel. Algoritma yang digunakan pada penelitian ini adalah support vector machine (SVM). Pengembangan skema klasifikasi mangrove pada penelitian ini di bagi menjadi 2 level, yaitu kelas penutup lahan di sekitar mangrove dan kelas komunitas mangrove. Data yang digunakan untuk klasifikasi kelas penutup lahan adalah data foto udara yang diperoleh dengan menggunakan pesawat tanpa awak (unmanned aerial vehicle/UAV) dan untuk klasifikasi komunitas menggunakan data transek tahun 2013. Akurasi keseluruhan (OA) yang diperoleh untuk klafikasi penutup lahan mangrove dengan kedua teknik klasifikasi berbasis objek dan piksel berturut-turut adalah 78,7% dan 70,9%. Sedangkan akurasi keseluruhan (OA) untuk klasifikasi komunitas mangrove berbasis objek dan piksel berutru-turut yaitu 76,6% dan 75,0%. Sekitar 7,8% peningkatan akurasi pemetaan penutup lahan dan sekitar 1,6% peningkatan akurasi pemetaan komunitas mangrove yang diperoleh dengan metode klasifikasi berbasis objek. ABSTRACTResearch on mangrove mapping at the Liong River Bengkalis Riau Province was very limited, therefore the spatial data availability of mangrove in Liong River is also very limited. The use of satellite remote sensing to map mangrove has become widespread as it can provide accurate, effecient, and repeatable assessments. The purposed of this study was to map mangrove at the community level using sentinel 2B imagery based on object-based classification method (OBIA) and it compared pixel-based classification at Liong River, Bengkalis, Riau Provinc. This study was used support vector machine (SVM) algorithm. The scheme classification use is that land cover and mangrove community. The classification data of land cover was collected using unmanned aerial vehicle (UAV) and community mangrove was using transect data of 2013. The result of land cover classification and community mangrove indicated that object-based classification technique was better than pixel-based classification. The highest an overall accuracy of land cover is 78.7% versus 70.9%, whereas mangrove community is 76.6 versus 75.0%. Approximately 7.8% increase in accuracy can be achieved by object-based method of classification for land cover and 1.6% for mangrove community
KARAKTERISTIK PENYAKIT WHITE BAND DISEASE DAN WHITE SYNDROME SECARA VISUAL DAN HISTOLOGI PADA KARANG Acropora sp. DARI PULAU GILI LABAK SUMENEP MADURA
Get PDFABSTRAKPenyakit white band disease dan white syndrome yang menyerang karang Acropora sp. di Pulau Gili Labak merupakan salah satu masalah yang perlu diperhatikan, sebab terjadinya kematian terumbu karang yang disebabkan oleh penyakit karang bukan hanya akan berpengaruh pada fungsi ekologis terumbu karang namun juga akan mempengaruhi fungsi ekonomis. Tujuan penelitian ini adalah untuk mendeteksi penyakit karang dengan metode histologi dengan studi kasus di Pulau Gili Labak, Poteran, Sumenep-Madura. Pengambilan sampel penelitian ini dilaksanakan pada bulan April 2017 di perairan Pulau Gili Labak Kabupaten Sumenep. Penelitian deteksi penyakit pada jaringan karang dengan metode histologi dilakukan pada Laboratorium Histologi Fakultas Kedokteran Universitas Brawijaya Malang. Analisa data dilakukan dengan metode analisa deskriptif. Ditemukan jaringan karang Acropora sp. yang terserang penyakit white band disease dan white syndrome yang terjadi banyak perbedaan antara jaringan karang yang sehat dengan yang sakit. Umumnya pada jaringan karang yang sehat terlihat susunan sel pada jaringan karang terlihat masih baik dan utuh, sedangkan pada jaringan karang yang sakit menunjukan bahwa jaringan mengalami degradasi disebabkan oleh jaringan yang lisis dan nekrosis, jaringan sakit terlihat hilang dan mulai hancur. Penyakit white band disease dicirikan dengan adanya jaringan yang mengelupas dari skeleton karang, sedangkan penyakit white syndrome hilangnya jaringan dimulai pada epidermis terlebih dahulu lalu merambat kedalam skeletonnya. ABSTRACTWhite band disease and white syndrome attacking Acropora sp. on the island of Gili Labak is one of the issues that need to be considered, because the loss of coral caused by disease will not only affect the ecological function of coral reefs but will also affect the economic function. The sampling of this research was conducted in April 2017 in the waters of Gili Labak Island of Sumenep Regency. Research on detection of coral tissue disease by histology method was done at Histology Laboratory Faculty of Medicine Universitas Brawijaya Malang. Data analysis was done by descriptive analysis method. Acropora sp. who are affected by white band disease and white syndrome showed the difference between healthy and affected coral tissues. Generally, on healthy coral tissue, the structure of the cells in coral tissue looks good and intact, whereas in diseased coral tissue show tissue degradation caused by lysis tissue and necrosis, tissue is lost and starts to disintegrate. The white band disease is characterized by the presence of peeling tissue from coral skeleton. While white syndrome disease loss of tissue begins in the epidermis first then propagate into their skeleton
GROWTH AND BLOOD PROFILE OF CORAL TROUT GROUPER Plectropomus leopardus SEEDS IN DIFFERENT SALINITIES
Get PDFThe information about the optimum and tolerable salinity to support in the success of coral trout grouper’s seed culture is still limited until now. The aim of this study was to understand the effect of different salinity on growth, survival, feed conversion (FCR) and the profile of blood (hematocrit and hemoglobin) of coral trout grouper seed. The seed with total length 6.0 ± 0.5 cm and body weight 3.2±0.3 g were used as tested animals. Five different salinity treatments, namely: 10±1 ppt (A), 16±1 ppt (B), 22±1 ppt (C), 28±1 ppt (D), and the sea water (34 ppt) as a control (E) were undertaken in this study, with three replications for each treatment. Salinity values were reach by adding freshwater into the tested seawater. Water changing system in this study was performed in recirculation process, with 25% of water replacement every 7 days. The result of this study showed that the survival rate values were 100% for all treatments, indicating that coral trout grouper seed can be cultured in the range of salinity between 10 to 34 ppt. The highest total length and body weight were recorded from treatment C (22 ppt), as well as noted to gain the lowest FCR. Correspondingly, the seed in treatment C also founded to have in the greatest amount of hematocrit and hemoglobin. Optimum salinity for rearing of coral trout grouper seeds with total length 6 cm was 22 ppt. Keywords: salinity, growth, survival rate, feed conversion, blood profil
CHARACTERISTICS OF BREAKING WAVES AND ANALYSIS OF SEDIMENT TRANSPORT IN TELUK KENDARI
Get PDFOne of the problems that often occured in the bay area is a sedimentation process that occurred continuously, causing silting. The movement of sediment material in the process of sedimentation is influenced by the movement of the water flow like the tides, winds, currents and waves. The aim of this study was to determine the characteristics of the hydrodynamic conditions, particularly the distribution pattern and the capacity of the sediments in the Kendari Bay with oceanographic modeling approach. Bathymetry data measured at the site of the research conducted in August 2015. The analysis of distribution patterns of sedimentation, sedimentation capacity, wave hindcasting, wind data and tidal data using software, hindcasting results indicate the dominant wind direction coming from the east. Type tides in Kendari Bay is a mixed mainly semiurdunal tides. The concentration of suspended sediment at low tide is greater than at high tide. Keywords: sediment transport, wave characteristics, Kendari Bay, hydro - dynamics, mike2
DISTRIBUTION AND BIOACCUMULATION OF HEAVY METALS Pb AND Cd ON BIVALVES Anadara nodifera, Meretrix lyrata, AND Solen lamarckii IN COASTAL WATERS OF THE WEST MADURA STRAIT
Get PDFMadura strait receives waste disposal from various activites in the mainland, making it vulnerable to contamination of harmful pollutants. Some of the harmful pollutants are heavy metal Pb and Cd. The high concentration Cd and Pb give negative impacts to the biota including bivalves. This study was conducted to assess the distribution of heavy metals Pb and Cd in the waters and their accumulation in bivalves Anadara nodifera, Meretrix lyrata, and Solen lamarckii in coastal waters of the West Madura Strait. Heavy metal analysis refer to APHA 2012 using AAS. The results showed that concentration of Cd and Pb in water were below the quality standards, while in sediment were above the standard (Cd of 7.20 mg/kg and Pb of 62.06 mg/kg). The concentration of Cd in bivalve were different among the species tested A. nodifera of 6.10 mg/kg, M. lyrata of 3.65 mg/kg, and S. lamarckii of 2.74 mg/kg, as well as Pb concentration A. nodifera of 60.10 mg/kg, M. lyrata of 51.48 mg/kg, and S. lamarckii of 45.29 mg/kg). These results indicated that the three shells have exceeded the maximum limit of heavy metal contamination in food (Cd of 1.0 mg/kg and Pb of 1.5 mg/kg). Keywords: bivalve, heavy metal, Madura Strai
NUTRITIONAL VALUE AND HEAVY METALS CONTENTS OF THE DRIED SEA CUCUMBER Stichopus vastus FROM SALEMO ISLAND, INDONESIA
Get PDFThe dried sea cucumber Stichopus vastus is one of the commercially species harvested in Indonesian waters. This study aims to highlight the nutritional value and heavy metals content of dried sea cucumber S. vastus. Proximate (moisture, ash, protein, fat and carbohydrate), mineral (sodium, calcium, potassium and iron) and heavy metal (mercury, cadmium, arsenic and lead) were determined by standard method of AOAC, while phosphorous was determined by spectrophotometric method. Chondroitin sulphate was determined by UPLC method, glucosamine sulphate and vitamin (A, B1, B2 and E) by HPLC method. Results show that protein was the major component in proximate analysis of dried sea cucumber S. vastus in the present study. The protein content was 38.70%. Moisture, ash, fat and carbohydrate content were 19.46%, 34.04%, 0.38% and 7.42% respectively. All vitamins and heavy metals examined in this study were not detected. The sodium content was 8054.36 mg/100 g higher than other minerals. Calcium, potassium, phosphorus and iron content were 2449.9 mg/100 g, 159.77 mg/100 g, 5085.2 mg/100 g and 520.8 mg/100 g respectively. Glucosamine sulphate content was found to be 2.429 g/100 g, whereas chondroitin sulphate was found to be 1.115 g/100 g. It can therefore, be concluded that the dried sea cucumber S. vastus from Salemo Island is safe for human consumption and hence can be used as a source of food supplement in the future. Keywords: food supplement, Salemo island, Stichopus vastu
PROFIL METABOLIT SEKUNDER, AKTIVITAS ANTIBAKTERI DAN KOMPOSISI SENYAWA YANG TERKANDUNG DALAM EKSTRAK METANOL TERIPANG Stichopus horrens
Get PDFStichopus horrens merupakan salah satu jenis teripang yang memiliki potensi untuk dikembangkan sebagai sumber bahan antibakteri dari laut. Sampel teripang S. horrens yang digunakan dalam penelitian ini berasal dari perairan Teluk Ratai Lampung pada bulan April 2016. Penelitian ini bertujuan untuk menentukan jenis metabolit sekunder, aktivitas antibakteri dan komposisi senyawa yang terkandung dalam ekstrak metanol teripang Stichopus horrens. Metode ekstraksi yang digunakan adalah metode maserasi menggunakan pelarut metanol. Identifikasi metabolit sekunder dengan pengamatan reaksi warna, pengendapan dan buih. Metode yang digunakan untuk uji aktivitas antibakteri adalah metode difusi agar, sedangkan analisa komposisi senyawa menggunakan Kromatografi Gas – Spektroskopi Massa (KG-SM). Hasil identifikasi golongan metabolit sekunder menunjukkan bahwa ekstrak metanol teripang S. horrens mengandung steroid dan saponin. Hasil uji aktivitas antibakteri menunjukkan bahwa ekstrak metanol teripang S. horrens hanya memiliki aktivitas antibakteri terhadap Bacillus subtilis dan Vibrio eltor. Berdasarkan hasil penelitian dapat disimpulkan bahwa terdapat 7 senyawa dengan indeks kemiripan sama atau lebih besar dari 90%. Senyawa tersebut terdiri dari asam 9,12-oktadekadienoat, asam heksadekanoat, 3,8-di-tert-butil-1,10-fenantrolin, 1,13-tetradekadiena dan 6,9-pentadekadien-1-ol. Senyawa dengan kelimpahan terbesar adalah 6,9-pentadekadien-1-ol yaitu 28,48% dengan waktu retensi 18,597 menit.