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ILMU KELAUTAN: Indonesian Journal of Marine Sciences

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ISSN : 08537291 EISSN : 24067598 DOI : -

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Earth & Planetary Sciences

ILMU KELAUTAN: Indonesian Journal of Marine Sciences (IJMS) is dedicated to published highest quality of research papers and review on all aspects of marine biology, marine conservation, marine culture, marine geology and oceanography.

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Seagrass Mapping Based on Satellite Image Worldview-2 by Using Depth Invariant Index Method Agnestesya Manuputty; Jonson Lumban Gaol; Syamsul Bahri Agus
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 21, No 1 (2016): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Seagrass has an important role in coastal areas, so it’s sustainability need to be maintained. One effort to preserve it is sustainable manner management of segrass based on the spatial data using remote sensing techniques. The aim of this study was to map seagrass ecosystems and to determining the accuracy level from classification results that obtained by the WorldView-2 images. This study was conducted in Karang Bongkok and Kotok Islands in August 2014 and March 2015. The satellite images data used on this study was WorldView-2 satellite images at the acquisition date of October 5, 2013. The method used to conduct image processing data is Depth Invariant Index (DII) using Support Vector Machine (SVM) classification. The result shows that seagrass mapping in Karang Bongkok and Kotok Islands using DII transformation has 19.5112 ha areas with 72% accuracy on Karang Bongkok Island and 2.5704 ha areas with of 83% accuracy on Kotok Island. Key words: Seagrass mapping, DII, SVM, Karang Bongkok, Kotok Island.

Rangsangan Perkembangan Ovari Udang Putih (Litopenaeusvannamei) dengan Penyuntikan Estradiol-17β Tarsim Tarsim; M. Zairin Jr; E. Riani
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 12, No 2 (2007): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Kontrol hormonal pada reproduksi udang belum mengalami perkembangan yang signifikan. Pada umumnyauntuk mempercepat kematangan gonad induk udang digunakan teknik ablasi. Mekanisme dan peranan hormonpada proses reproduksi udang belum banyak diketahui. Keberadaan hormon steroid pada krustase telah dikemukaan oleh beberapa peneliti, tetapi peranannya belum banyak diketahui. Pada penelitian ini dikajipengaruh penyuntikan hormon estradiol-17β pada perkembangan gonad induk udang putih (Litopenaeus vannamei). Penelitian Ini menggunakan dosis 0,10¼g/g bobot tubuh dengan perlakuan penyuntikan tunggal (hari ke-0 dan ganda (hari ke-0 dan ke-6). Sebagai pembanding dilakukan uji tanpa perlakuan (kontrol). Untuk melihat respon perkembangan gonad, pemeliharaan induk dilakukan selama 12 hari. Hasil penelitian menunjukkan bahwa estradiol-17β berpengaruh positif pada perkembangan gonad. Gonado somatic index (CSI) dan rata-rata diameter oosit pada perlakuan relative lebih tinggi dibandingkan kontrol. Penyuntikan ganda memberikan pengaruh paling besar dengan peningkatan GSI sebesar 0,453 dan rata-rata diameteroosit 23,97 μm. Oosit pada gonad hanya mampu berkembang hingga tahap previtelogenesis. Hal ini menunjukkan bahwa estradiol-17β berperang dalam vitelogenesis endogenous. Keberadaan hormon penghambat perkembangan yang dihasilkan tangkai mata diduga menyebabkan oosit tidak dapat mencapai matang. Analisis SDS-PA GE menunjukkan bahwa protein kuning telurpada gonad terdapat 5 sub unit dengan perkiraan bobot 95, 98, 109 kDa dan dua unit >118 kDa. Kata kunci:Gonad, estradiol-17β, oosit, L. vannamei

Cryptic Species from Biodiversity Hotspot: Estimation of Decapoda on Dead Coral Head Pocillopora in Raja Ampat Papua Eka Maya Kurniasih; Andrianus Sembiring; Ni Putu Dian Pertiwi; Aji Wahyu Anggoro; Ni Kadek Dita Cahyani; Muhammad Dailami; Ambariyanto Ambariyanto; Diah Permata Wijayanti; Christopher P. Meyer
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 25, No 1 (2020): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Cryptic organisms that live within the interstices of reef habitats contribute significantly to coral reef biodiversity. One example of this cryptic biodiversity is the high abundance of decapods in dead coral heads that associated with various biota. However, this diversity poorly studied especially species identification and species richness. This study aims to estimate the decapods diversity in Raja Ampat, Papua, using Pocillopora dead coral head method as semi-quantitative sampling approach. Raja Ampat in Papua is chosen because it situated in the center of Coral Triangle marine hotspot. Data were collected from 10 dead coral heads of genus Pocillopora from 10-meter depth near the islands of Kri and Misool. This study observed a total of 205 individuals Decapoda from Kri Island and 672 Individual from Misool Islands. Species richness observation (Chao1 and ACE) of the total samples reports only 11 families of decapoda detected in this study. Rarefaction curve reach an asymptote after all after all ten dead coral were analyzed; indicating that additional sample collection would not change estimates of diversity found in this study. The Shannon-Wiener index diversity on the Kri Island showed lower diversity value (2.09) compared to Misool Island (2.18). In the future, this research can be used as a basis for understanding the diversity of coral reefs as well as for management and conservation of coral reef ecosystems.

Profil Pigmen Polar dan Non Polar Mikroalga Laut Spirulina sp. dan Potensinya sebagai Pewarna Alami (Profile of Polar and Non-Polar Pigment from Marine Microalgae Spirulina sp. and Their Potential as Natural Coloring) Sri Sedjati; Ervia Yudiati; Suryono Suryono
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 17, No 3 (2012): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Penelitian pigmen Spirulina sp. dilakukan untuk menentukan kandungan pigmen polar dan non polar dari Spirulina sp. dengan metode Spektroskopi UV-Vis. Pigmen polar diekstraksi dengan menggunakan larutan buffer fosfat (NaOH-KH2PO4) pH 7, sedangkan pigmen non polar diekstraksi dengan menggunakan aseton murni. Hasil penelitian menunjukkan bahwa pigmen polar berwarna biru dan kadarnya adalah sebesar 42,272±0,05 mg/g (berat kering), pigmen ini terdiri dari fikosianin (29,159±0,29 mg/g), allofikosianin (9,363±0,20 mg/g), dan fikoeritrin (3,750±0,09 mg/g). Warna pigmen non polar adalah hijau terang dan kadarnya sebesar 4,498±0,06 mg/g (berat kering), pigmen ini terdiri dari klorofil a (3,349±0,03 mg/g) dan karotenoids (1,158±0,03 mg/g). Ekstrak pigmen polar Spirulina sp. kadarnya lebih tinggi dibanding pigmen non polarnya. Pigmen fikosianin berpotensi dikembangkan sebagai bahan aditif pewarna biru alami, karena: kadarnya paling tinggi, menghasilkan warna biru cerah dan cemerlang, bersifat nutrisi fungsional dan tidak beracun.Kata kunci: Spirulina sp., polar, non polar, pigmen, alamiResearch on pigments from Spirulina sp. powder has been done in order to determine polar and non polar pigments content by UV-Vis Spectroscopy method. Polar pigments were extracted using phosphate buffer (NaOH-KH2PO4) pH 7, while non polar pigments were extracted using pure aseton. The result showed that colour of polar pigment was dark blue and its content was 42,272±0,05 mg/g (dry weight), these pigments consist of phycocyanin (29,159±0,29 mg/g), allophycocyanin (9,363±0,20 mg/g), and phycoerythrin (3,750±0,09 mg/g). The colour of non polar pigment was light green and its content was 4,498±0,06 mg/g (dry weight), these pigments consist of chlorophyll a (3,349±0,03 mg/g) and carotenoids (1,158±0,03 mg/g). Due to the high content of pigments from Spirulina sp, showing a bright blue colour, having functional nutrition, and non toxic, the polar pigment phycocyanin have been found suitable for use as additif natural blue colorant.Key word: Spirulina sp., polar, non polar, pigment, natural

Karakteristik Shoaling Ikan Pelagis Menggunakan Data Akustik Split Beam di Perairan Selat Bangka Pada Musim Timur Fauziyah Fauziyah; Hartoni Hartoni; A Agussalim
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 15, No 1 (2010): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Cruise track hidroakustik di perairan Selat Bangka, Bangka Belitung dilaksanakan pada bulan Agustus 2007 dan Juli 2008 menggunakan scientic echosounder split beam SIMRAD EK 60. Data akustik (echogram) memiliki keterbatasan dalam membedakan echo spesies yang ada, sehingga sulit menentukan jenis dan gerombolan (shoal) ikan, terutama pada ikan-ikan multispesies. Untuk itu, metode hidroakustik yang digunakan adalah metode deskriptor akustik. Karakteristik shoaling ikan pelagis kecil di Perairan Selat Bangka pada musim timur adalah sebagai berikut : Kelompok pertama, berbentuk elips dengan ukuran panjang 4.3 m, berada pada kedalaman 8,9 m dan posisi shoaling ikan pada kedalaman 25.2% dari dasar perairan. Energi akustik rata-rata (-46,4) dB. Kelompok kedua, berbentuk elips dengan ukuran panjang 6,2 m, berada pada kedalaman 5,5 m dan posisi shoaling ikan pada kedalaman 66,4% dari dasar perairan. Energi akustik rata-rata (-44,7) dB.Kata kunci : gerombolan, hidroakustik, ikan pelagis, Selat Bangka A series of hydroacoustic surveys conducted in Bangka Strait in August 2007 and July 2008 to collect acoustic data (echogram) of pelagic fish shoals using SIMRAD EK 60 split beam scientific echosounder system. Echogram have limited by an inability to distinguish between the echoes of co-occurring species then incorrect to determine the species composition and shoaling of fishes. Particularly in multi species environments. Small pelagic fish shoal characteristics can be described as follows: First group, The fish shoals were in ellipsoidal shape with length 4.3m. Mean depth of the fish shoals were in 8.9 m and relative altitude 25.2% from sea bottom. Average acoustic energy was -46.4 dB. Second group, The fish shoals were in ellipsoidal shape with length 6.2m. Mean depth of the fish shoals were in 5.5 m and relative altitude 66.4% from sea bottom. Average acoustic energy was -44.7 dB. Keywords : shoal, Bangka Strait, hydroacoustic, pelagic fish.

Exploration, Isolation, and Identification of Carotenoid from Bacterial Symbiont of Sponge Callyspongia vaginalis Iqna Kamila Abfa; Ocky Karna Radjasa; A B Susanto; Handung Nuryadi; Ferry F. Karwur
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 22, No 2 (2017): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

During the past two decades research on marine bacteria has highlighted the tremendous potential of symbiotic-microorganisms as a source of bioactive secondary. One of the potential of the bacterial symbionts is producing a natural pigment, and these organisms can be used as a sustainable source of natural pigments. Carotenoid is one of the most important pigments that has important roles in physiological and molecular processes of microorganisms, as well as for human health. The objective of this study is to analyze carotenoid pigments from marine bacterial symbionts from sponge and to identify bacterial symbionts that produce carotenoid pigments. Pigment analysis was performed by a UV-VIS spectrophotometer and High Performance Liquid Chromatography (HPLC). Molecular bacterial identification was performed based on 16S rDNA sequence. The isolation of bacterial symbionts from C. vaginalison Zobell 2216E medium resulted in one bacterium, CB-SP5, positively synthesized carotenoids. By reverse phase HPLC analysis, the carotenoid pigments in the bacterial symbionts were identified as diadinoxanthin, fucoxanthin, neoxanthin, dinoxanthin, anddiadinochrome. CB-SP5 shared the highest level of 16S rDNA gene sequence similarity with Psychrobacter celer (99%). Keywords : carotenoid, sponge, bacterial symbiont, 16S rDNA.

Nutrient Content of Seagrasss Enhalus acoroides Leaves in Barranglompo and Bonebatang Islands: Implication to Increased Antrhropogenic Pressure Khairul Amri; Dede Setiadi; Ibnul Qayim; D Djokosetianto
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 16, No 4 (2011): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Seiring dengan peningkatan jumlah penduduk di daerah pesisir, tekanan terhadap ekosistem pantai semakin meningkat pula. Untuk mengetahui dampak dari aktifitas anthropogenik terhadap status hara (karbon, nitrogen dan fosfor) pada lamun telah dilaksanakan penelitian pada dua pulau di Kepulauan Spermonde yakni Pulau Barranglompo dan Bonebatang. Kedua pulau ini mendapat tekanan anthropogenik berbeda. Sampel diambil dari daun lamun Enhalus acoroides pada tiga stasiun dengan jarak berbeda dari garis pantai pada masing-masing pulau. Hasil pengukuran hara menunjukkan bahwa konsentrasi nitrogen di Pulau Barranglompo jauh lebih tinggi dibandingkan Pulau Bonebatang. Nilai rasio C:N yang lebih rendah dan nilai rasio N:P yang lebih tinggi di Pulau Barranglompo memperkuat hal ini. Perbedaan ini mengindikasikan pengaruh dari pengayaan hara akibat aktifitas anthropogenik yang semakin meningkat. Hal ini didukung oleh nilai Total Padatan tersuspensi yang jauh lebih tinggi di Pulau Barranglompo dibandingkan Pulau Bonebatang. Aktifitas anthropogenik yang paling potensial mempengaruhi komposisi hara di Pulau Barranglompo adalah pembuangan sampah rumah tangga dan aliran limbah cair dari rumah penduduk di sekitar pantai. Kata kunci: lamun, hara, rasio C:N:P, aktifitas anthropogenik, Barranglompo, Bonebatang As human population increase in coastal areas, significant pressure to the coastal ecosystem increase as well. In order to reveal possible impacts of anthropogenic activities to the nutrient status of seagrasses, a study has been done in two small islands within Spermonde Archipelago i.e. Barranglompo and Bonebatang Islands. Currently, these two islands are facing different anthropogenic pressure. Samples of seagrass Enhalus acoroides were collected from three stations based on their different distances from the shoreline. Results of the nutrient measurements showed that nitrogen concentrations in Barranglompo Island were significantly higher than those in Bonebatang Island. This was supported by lower C:N ratios and higher N:P ratios in Barranglompo Island. This difference indicated influence of nutrient enrichment due to increased anthropogenic activities. Significantly higher Total Suspended Solid (TSS) values were also a strong evidence of this process. Potential anthropogenic activities affecting nutrient composition in Barranglompo Island are domestic sewage disposal and drainage of liquid household sewage. Key words: seagrass, nutrient, C:N:P ratio, anthropogenic activities, Barranglompo, Bonebatang

Comparison of Adsorption Models for Cd and Zn in the Berau Delta: Water–Sediment System (Perbandingan Model Penyerapan Cd dan Zn di Delta Berau: Sistem Perairan-Sedimen) Fitri Budiyanto; Lestari Lestari
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 18, No 3 (2013): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Adsorpsi merupakan proses penting dalam mengontrol transfer logam dari larutan ke padatan. Cd dan Zn merupakan logam yang banyak digunakan manusia sehingga berpotensi banyak dibuang ke lingkungan. Penelitian ini membandingkan model adsorpsi Cd dan Zn dalam sistem air laut-sedimen di delta Berau, Kalimantan Timur. Sampel air dan sedimen didapat di 12 stasiun. Untuk mendapatkan konsentrasi Cd dan Zn, sampel air dianalisis menggunakan metode back extraction yang menggunakan bahan kimia organik (Amonium pirolidinditio karbamat dan metili sobutil keton) dan anorganik (asam nitrat). Sampel sedimen dianalisis menggunakan distruksi asam yang mengacu metode dari USEPA 3050b. Data yang didapat dikalkulasi berdasar model adsorpsi yaitu: Model partisi, Freundlich Model dan Langmuir Model. Dalam perhitungan di studi ini, Delta Berau dibagi menjadi dua bagian: bagian utara dan bagian selatan. Dari kedua bagian ini, Model isotermis langmuir merupakan model yang paling cocok untuk proses adsorpsi dalam sistem air sedimen. Di sungai bagian utara, hasil perhitungan linearitas memberikan angka R2=0.949 untuk Cd dan R2=0.838 untuk Zn, sedangkan, untuk sungai bagian selatan nilai R2=0.575 untuk Cd dan R2=0.944 untuk Zn. Kapasitas adsorpsi maksimum Cd adalah 0,5-0,6 mg.kg-1 sedangkan kapasitas adsorpsi maksimum untuk Zn adalah 12-43 mg.kg-1. Prediksi kapasitas maksimal sedimen menggambarkan total kapasitas sedimen sebagai Cd dan Zn deposit. Penambahan Cd dan Zn akan menyebabkan logam-logam tersebut tidak teradsorpsi dan berpotensi racun bagi organisme perairan. Kata kunci: delta Berau, adsorpsi, air, sedimen, model isotermis langmuir Adsorption is important process for controlling metals transfer from dissolved phase to solid phase. Cd and Zn become trace metal which generally used in human activity and the release of those trace metals into aquatic environment cannot be evaded.The purpose of this work was to compare adsorption models of Cd and Zn in water-sediment system in Berau Delta, East Kalimantan. Sediment and water sample were collected at 12 stations. Measuring Cd and Zn concentration, water sample analysis was conducted using organic chemicals (Ammonium Pyrrolidine Dithio Carbamate and Methyl Isobutyl Ketone) and inorganic chemicals (nitric acid) based on back extraction procedure. On the other hand, sediment analysis was conducted using acid destruction according to USEPA method 3050b. The data would be calculated in some different adsorption model: Partition model, Freundlich model and Langmuir model. In this study, Berau Delta was divided into two groups: North river stream (N) and South river stream (S). In both groups,Langmuir isotherm model was the most representative model for adsorption process in water-sediment system. In North stream, the linearity of data gave R2=0.949 for Cd and R2=0.838 for Zn, whereas, R2=0.575 for Cd and R2=0.944 for Zn calculated in the South stream. Maximum adsorption capacity of Cd was 0.5-0.6 mg.kg-1 and maximum adsorption capacity of Zn was 12-43 mg. kg-1. Those maximal adsorption capacities illustrated the total capability of sediment as Cd and Zn deposit. Another Cd and Zn input will not be adsorbed and probably become bioavailable for aquatic life. Keywords: Berau delta, adsorption, water, sediment, langmuir isotherm model

Pengaruh Aktivitas Wisata Bahari terhadap Kualitas Perairan Laut di Kawasan Wisata Gugus Pulau Togean Alimudin Laapo; Achmad Fahrudin; Dietriech G Bengen; Ario Damar
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 14, No 4 (2009): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Gugus pulau Togean memiliki potensi sumberdaya perairan yang dimanfaatkan untuk kegiatan wisata bahari. Peningkatan kunjungan turis pada periode tertentu menyebabkan aktivitas wisata dan kegiatan terkait meningkat, sehingga berpengaruh terhadap penurunan kualitas perairan dan obyek wisata. Penelitian ini bertujuan untuk mengkaji keterkaitan antara musim kunjungan turis dalam setahun dengan perubahan yang terjadi pada beberapa parameter kualitas perairan laut di sekitar kawasan obyek wisata. Metode analisis yang digunakan adalah PCA (Principal Component Analysis) dan analisis IPL (Indeks Pencemaran lingkungan). Hasil penelitian menunjukkan bahwa peningkatan kunjungan turis menyebabkan peningkatan nilai BOD5, COD, dan NH3 serta penurunan nilai DO di perairan. Nilai korelasi keempat parameter tersebut lebih tinggi pada bulan Nopember dibanding Juli, dan merupakan komponen parameter pembentuk sumbu utama pertama di kedua musim. Peningkatan nilai kekeruhan, penurunan salinitas dan suhu pada bulan Nopember dibanding bulan Juli karena terkait dengan musim penghujan dan gelombang yang tinggi. Indeks pencemaran lingkungan perairan meningkat 21,05% selama musim puncak kunjungan turis, namun secara umum perairan gugus Pulau Togean masih dalam kategori belum tercemar. Kata kunci : kualitas perairan laut, aktivitas wisata, Gugus Pulau Togean Marine resources of Togean Islands have been used for tourism activity. The increasing number of tourist in certain period every year has lead to increasing of tourism activity and its related activity. This condition probably effects sea water and habitat qualities. This research aim to studied correlation between tourist season in one year and the change of marine water quality parameters in tourism area. The data were analyzed using PCA (Principal Component Analysis) and EPI(environmental pollution index). The result showed that BOD5, COD, and NH3 increased while DO decrease during the peak season of tourism activity. The correlation value of those four parameters was relatively higher in November than in July. Those parameters were the component that forms the main axis in both seasons. The increasing of turbidity and decreasing of salinity and temperature in November rather than in July were correlated with rainy season and high wave. Water pollution index increasing during peak season of tourism activity, but in general, marine water quality of Togean Islands can be categorized as good (not yet polluted) based on water pollution index. Key words: sea water quality, tourism activity, Islands Togean

Quantitative Comparison of Algorithms for Estimating the Air-sea Exchange of Carbon Dioxide in Malacca Straits Lilik Maslukah; Didi Adisaputro; Widodo Setiyo Pranowo
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 23, No 2 (2018): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

A precise quantification of the sea surface partial pressure of carbon dioxide (pCO2(water)) at the water surface is required in order to define the role of the sea in air-sea exchange of CO2. Even though the pCO2(water) can be measured directly, the semi-empirical model has seen numerous application in determining the pCO2 (water) due to a time-and cost-efficient. This study aims to compare the pCO2 and FCO2 (Flux of CO2) calculated using Zhai and Zhu algorithm with the underway datasets of pCO2 obtained during the scientific cruise of CISKA-SPICE III in April 2013. The partial pressure of CO2 (pCO2) was measured using a high-accuracy electrochemical instrumentation underway HydroC/CO2 FT (flow through) with an error ±1 μ atm. Furthermore, in order to calculate the pCO2 and the FCO2 employing widely used algorithms, some data were needed including wind speed, sea surface temperature and chlorophyll-a extracted from MODIS (Moderate Resolution Imaging Spectroradiometer). According to the results obtained, the difference between the pCO2 and FCO2 derived from those two algorithms are significant. The underway datasets of pCO2 are ranging from 409.52-544.01 µatm. Meanwhile, the pCO2 derived using the Zhai algorithm and Zhu algorithm are between 405.003–422.79 µatm and 398.94-752.06 µatm respectively. The FCO2 are varied between 0.02–0.06 molC.m-2.day-1 (Zhai algorithm), 0.02-0.57 molC.m-2.day-1 (Zhu algorithm) dan 0.04-0.23 molC.m-2.day-1 (the underway datasets). A comparison of the two results reveals that pCO2 derived using Zhai algorithm is closer with the underway datasets compared with the result of pCO2 calculated using Zhu algorithm with the MRE (Mean Relative Estimation Error) as large as 19.4% and 39% respectively. Taken together, these results suggest that the Zhai algorithm is more appropriate to determine algorithms for estimating the air-sea exchange of carbon dioxide in the Malacca Straits.Keywords: carbon dioxide, Malacca Straits, pCO2, FCO2, Zhai and Zhu algorithm

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Location Kota semarang, Jawa tengah INDONESIA

Abstract

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Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
-

Contact Email
-

Phone
-

Journal Mail Official
-

Editorial Address
-

Location
Kota semarang,

Jawa tengah

INDONESIA