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Journal of Marine Research

jmr
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Published by Universitas Diponegoro

ISSN : - EISSN : 24077690 DOI : 10.14710/jmr.v9i4.28340

Core Subject : Science,

Earth & Planetary Sciences

The Journal of Tropical Fisheries Management is managed by the Department of Water Resource Management, Faculty of Fisheries and Marine Sciences, Bogor Agricultural University aims to publish the results of basic, applied research in the scope of fisheries resources, fish stock studies, and population dynamics, fish biodiversity, fisheries technology, industrialization and fish trade, fisheries management, and fisheries development policies in the tropics, especially Indonesia. The scope of the area includes: Marine Fisheries Coastal Fisheries Inland Fisheries The focus and scope of this publication are expected to contribute thoughts for the government to strengthen the science of fisheries management

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Articles 687 Documents

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Kajian Rumput Laut Sargassum duplicatum J. G. Agardh sebagai Penghasil Bioetanol dengan Proses Hidrolisis Asam dan Fermentasi Saputra, Dion Ragil; Ridlo, Ali; Widowati, Ita
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Bioethanol is an alternative fuel made from biomass containing sugar components, starch, and cellulose. So far, bioethanol is made from raw materials which become a source of food and feed resulting in the competition. The potential of cellulosic biomass seaweed S. duplicatum as bioethanol production can be a solution to resolve the issue. The purpose of this research was to study seaweed S. duplicatum J.G. Agardh as raw material for bioethanol. Method used for this research was experimental laboratory with a completely randomized design (RAL) factorial pattern to test glucose levels and a randomized block design (RAK) to test the ethanol levels. Ethanol concentration was determined by Gas Chromatography (GC). Hydrolysis with H2SO4 concentration of 0.2 M, 0.3 M, 0.4 M, 0.5 M and the variation within 30 minutes, 60 minutes, 120 minutes. The fermentation conducted with yeast S. cereviceae with incubation time 24 hours, 48 hours, 72 hours. Ethanol concentration measurements conducted using Gas Chromatography (GC). The results showed that the best conditions for hydrolysis of concentrated H2SO4 0.4 M (28.051 mg / ml Â± 1.100) and 120 minutes (23.128 mg / ml Â± 6.069). During the fermentation process, the maximum ethanol levels achieved at 72 hours incubation time is 0.0451% v / v Â± 0.0098

Kandungan Kadmium (Cd) dalam Air, Sedimen, dan Kerang Hijau (Perna viridis) di Perairan Trimulyo Semarang Wardani, Ibnu; Ridlo, Ali; Supriyantini, Endang
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

ABSTRAK : Pertumbuhan kawasan pesisir yang pesat, menyebabkan terjadinya degradasi dari fungsi ekologis lingkungan pesisir terutama pada wilayah perairan. Selama beberapa tahun terakhir pencemaran perairan oleh logam berat telah menjadi masalah di Indonesia. Hal ini disebabkan karena logam berat tidak bisa dihancurkan dan dapat terakumulasi di perairan. Penelitian ini bertujuan untuk mengetahui kandungan Kadmium (Cd) dalam Air, Sedimen, dan Kerang Hijau (Perna viridis) dan status pencemarannya di Perairan Trimulyo Semarang.Sampel diambil pada bulan April 2015 dan Januari 2016 di Perairan Trimulyo Semarang. Metode Penelitian yang digunakan adalah metode penelitian deskriptif. Pengambilan sampel dilakukan secara Purposive Sampling Method. Analisa logam berat menggunakan AAS (Atomic Absorbtion Spectrophotometry).Hasil penelitian menunjukan kandungan Kadmium dalam air di perairan Trimulyo Semarang pada bulan April 2015 berkisar antara 0,028-0,054 mg/L, sedangkan pada Januari <0,001 mg/L, sedangkan untuk kandungan Kadmium dalam sedimen di perairan Trimulyo Semarang pada bulan April 2015 berkisar antara 0,176-0,206 mg/kg, sedangkan pada Januari 2016 <0,004 mg/kg. Kandungan Kadmium dalam Kerang Hijau (P. Viridis) nilai sama pada kedua waktu yaitu <0,01 mg/kg. Menurut KepMen LH No.51 Tahun 2004 dan Wiconsin Department of Natural Resources tahun 2003. Status pencemaran Kadmium dalam air pada bulan April 2015 di Perairan Trimulyo Semarang telah melewati standar baku mutu yang ditetapkan.Â ABSTRACT : The rapid growth of coastal areas, causing degradation of ecological functions of coastal environments, especially in the water area. Over the past few years water pollution by heavy metals has become a problem in Indonesia. This is because heavy metals are not indestructible and can accumulate in the water. Penelitian aims to determine the content of Cadmium (Cd) in Water, Sediment, and green mussels (Perna viridis) and the status of pollution in the waters Trimulyo Semarang.Sampel taken in April 2015 and January 2016 in the waters Trmulyo Semarang. The research method used is descriptive method. Sampling was done by purposive sampling method. Heavy metal analysis using AAS (Atomic Absorption Spectrophotometry) The results of the study show the content of Cadmium in the water at the water Trimulyo Semarang in April 2015 ranged from 0.028 to 0.054 mg / L, whereas in January <0.001 mg / L, whereas for the content of Cadmium in sediment in waters Trimulyo Semarang in April 2015 ranged from 0.176 to 0.206 mg / kg, whereas in January 2016 <0,004 mg / kg. The content of Cadmium in Green mussels (P. Viridis) has an average value equal to the second time in the amount of <0.01 mg / kg. According to the decree of 2004 and the LH 51 Wiconsin Department of Natural Resources in 2003. Status of Cadmium contamination in the water in April 2015 in waters Trimulyo Semarang has passed the quality standard set.

Studi Komposisi Isi Lambung Dan Kondisi Morfometri Untuk Mengetahui Kebiasaan Makan Ikan Manyung (Arius thalassinus) Yang Diperoleh Di Wilayah Semarang Taunay, Prayoga Nugraha; Wibowo, Edi; Redjeki, Sri
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Manyung fish (Arius thalassinus) is one of the bottom fish (demersal), which has significant economic potential. One of the measures that can be done to preserve the habitat of fish manyung is a rational exploitation. Information on the biological aspects can be provide additional information on the food and feeding habits and the condition of fish manyung morphometry, to gain a better understanding on the survival and growth of fish. The study was conducted to examine the contents of the stomach and the type of food eaten and the condition of morphometry of manyung fish were caught from the waters around Semarang, manyung fish samples obtained from collectors of Semarang in the krobokan. Manyung fish samples taken on July, August, September and October 2011, with total sample of 50 fish. Retrieval of data in this study conducted in the field and in the laboratory by measuring the weight, total length of fish, fish food organisms manyung frequency, and calculate the volume food organisms of fish manyung. Manyung major food fish (Arius thalassinus) by his preponderance index is a kind of fish with a value of 28.7%. Base of composition of stomach contents, types of mouth (sub terminal), the presence of tentacle, and the length of intestines (1,7-2 times length of the body ) can be concluded manyung fish (Arius thalassinus) is omnivores which tend to be carnivores. The results of 50 samples Manyung fish (Arius thalassinus) gained the most long range artifacts in the interval 55-61 cm (23 fish), weight range for most numerous in the interval 1.6 to 2.7 kg (30 fish).

Kelimpahan Fitoplankton Pada Tambak Tidak Produktif Di Desa Mangunharjo, Semarang Kolaya, Ira; Hartati, Retno; Endrawati, Hadi
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Tambak atau kolam adalah badan air yangÂ berukuran 1 m2 hingga 2 ha yang bersifat permanen atau musiman yang terbentuk secara alami atau buatan manusia. Lingkungan merupakan salah satu faktor pendukung produktifitas tambak. Kelimpahan fitoplankton di pengaruhi oleh faktor kimia, biologi, dan fisika. Pengambilan sampel fitoplankton dilakukan setiap 2 minggu dimulai tanggal 6 Juli, 20 Juli, 3 Agustus dan 17Agustus 2013. Hasil penelitian didapatkan 3 kelas fitoplankton yaitu kelas Bacillariophyceae, Cyanophyceae dan Dinophyceae. Kelimpahan tertinggi di temukan di Stasiun II periode sampling pertama yaitu 333 sel/L sedangkan kelimpahan terendah di temukan di Stasiun I periode sampling ke empat yaitu 101 sel/L. Nilai indeks keanekaragaman berkisar antara 1,03-1,89 termasuk dalam kategori sedang. Nilai indeks keseragaman berkisar antara 0,40-0,74 termasuk dalam kategori sedang. Nilai indeks Dominansi bervariasiÂ yaitu 0,26-0,60. Nilai tertinggi pada Stasiun I dan II dengan di dominansi genus Rhizosolenia. Berdasarkan hasil penelitian dapat disimpulkan bahwa jumlah genus fitoplankton yang ditemukan selama penelitian berjumlah 23 genus yang terbagi menjadi 3 kelasÂ Â Â yaitu Bacillariophceae, Cyanophyceae dan Dinophyceae. Berdasarkan nilai kisaran Nitrat 3,08-4,2 mg/L dan Fosfat 0,21-0,54 g/L maka dapat di katakan ketiga tambak masih dalam keadaan yang sangat subur

Analisis Multivariat Untuk Melihat Hubungan Jenis Sedimen Terhadap Jenis Lamun Chamidy, Ardian Nurrasyid; Suryono, Chrisna Adhi; Riniatsih, Ita
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Â ABSTRAK: Perairan Teluk Awur dan Pulau Panjang memiliki kondisi perairan yang berbeda dan merupakan perairan yang masih baik untuk pertumbuhan lamun. Ekosistem padang lamun tumbuh pada sedimen dan hidup terendam di dalam air laut. Komposisi jenis sedimen diduga dapat menyebabkan perbedaan komposisi jenis lamun yang didasari oleh pemikiran bahwa perbedaan komposisi ukuran butir sedimen akan menyebabkan perbedaan nutrisi bagi pertumbuhan lamun. Penelitian ini bertujuan untuk mengkaji hubungan jenis sedimen terhadap jenis lamun di perairan Teluk Awur dan Pulau Panjang Jepara dengan menggunakan analisis multivariat. Penelitian ini dilakukan dalam beberapa tahap yang meliputi tahap persiapan, tahap penentuan stasiun dengan metode sampling purposive method, tahap pengambilan data lapangan, tahap analisis tekstur sedimen yang dilakukan di laboratorium teknik sipil fakultas teknik Universitas Diponegoro, dan tahap analisis data menggunakan analasis multivariat yaitu Principal Component Analysis (PCA). Hasil analisis PCA Â menunjukkan Â bahwa Â Cymodocea Â serrulata Â danÂ CymodoceaÂ rotundata Â berkorelasi positif dengan sand, kecepatan arus, dan pH. Thalassia hemprichii dan Enhalus acoroides memiliki korelasi positif dengan silt, clay, suhu, salinitas dan bahan organik. Gravel memiliki korelasi postif dengan nitrat dan fosfat.ABSTRACT: The waters of Teluk Awur and Panjang Island have different water conditions and are still good waters for seagrass growth. Seagrass ecosystems grow in sediments and live submerged in seawater. The composition of the substrate types is thought to cause differences in the composition of seagrass types based on the thought that differences in the composition of sediment grain size will cause differences in nutrition for seagrass growth. This study aims to examine the relationship of sediment types to seagrass species in Teluk Awur Â and Â Pulau Â Panjang, Â Jepara Â byÂ using Â multivariate Â analysis. Â This Â research Â was conducted Â in Â severalÂ stages Â including Â the Â preparation Â stage, Â the Â stage Â of Â determining stations with the purposive sampling method, the stage of field data collection, the stage of sediment texture analysis carried out in the civil engineering laboratory of the engineering faculty Diponegoro University, and the stage of data analysis using multivariate analysis with Principal Component Analysis (PCA). PCA analysis results show that Cymodocea serrulata and Cymodocea rotundata are positively correlated with sand, current speed, and pH. Thalassia hemprichii and Enhalus acoroides have a positive correlation with silt, clay, temperature, salinity and organic matter. Gravel has a positive correlation with nitrate and phosphate.

ANALISIS PERUBAHAN PENGGUNAAN LAHAN DI WILAYAH PESISIR KOTA PEKALONGAN MENGGUNAKAN DATA LANDSAT 7 ETM+ Shofiana, Rina; Subardjo, Petrus; Pratikto, Ibnu
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

The research of land use change is very important for this time, because of changes in land use have an impact on the physical and social environment. The purpose of this research is to determine the extent and causes of land use change in Pekalongan coastal area from 1999 - 2012 using the data of Landsat 7 ETM+ satellite image. This research uses unsupervissed classification method by using the Er Mapper 7.0 software. Then to analyze the land use change using overlay land use maps of 1999, 2006, and 2012 use ArcGIS 9.3 software. The results showed that the land use change in the Pekalongan coastal from 1999 - 2012 shows pool is the largest additional land use changes the amount of Â± 334.91 ha. This caused by rob in the research area. While vacant land is the largest land use which have a reduction in the amount of Â± 792.86 ha. It is influenced by human factors such as population growth (number and distribution), the increase was also influenced by economic and physical factors such as topography, and soil type. Based on the results of the land use change research in the Pekalongan coastal from 1999 - 2012 there are some additional and reduction.

Kelimpahan Rumput Laut Di Komunitas Lamun Di Perairan Pulau Nyamuk Kepulauan Karimunjawa Putra, Rio Adista Widodo; Santoso, Adi; Riniatsih, Ita
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Pulau Nyamuk merupakan salah satu pulau yang berada di bagian barat kepulauan Karimunjawa. Rumput laut dan lamun masuk dalam vegetasi pesisir yang ada di Pulau Karimunjawa. Tingginya aktivitas penangkapan ikan oleh nelayan dan rencana pembangunan sarana pariwisata diduga menjadi pemicu tertekannya 2 vegetasi laut tersebut di Pulau Nyamuk. Tujuan dilakukannya penelitian ini adalah mengidentifikasi jenis dan struktur komunitas rumput laut di padang lamun di perairan Pulau Nyamuk Kepulauan Karimunjawa. Materi yang digunakan dalam penelitian ini adalah tumbuhan rumput laut dan lamun. Penelitian ini menggunakan metode deskriptif eksplorasif. Penelitian ini dilakukan pada 3 stasiun yang berbeda di perairan Pulau Nyamuk, yaitu pada stasiun A bagian timur, stasiun B pada bagian barat dan stasiun C pada bagian utara Pulau Nyamuk. Ditemukan 5 jenis rumput laut jenis Padina australis, Halimeda macroloba, Caulerpa sertulairoides, Caulerpa racemosa dan Sargassum sp. dan 2 spesies lamun jenis Enhalus acoroides dan Halophila ovalis. Rata-rata total tutupan rumput laut adalah 48,61 % sedangkan tutupan lamun adalah 19,94 %. Nilai indeks keanekaragaman dan keseragaman rumput laut termasuk kategori rendah, kecuali pada perairan utara pulau nilai keanekaragamannya sedang dan nilai keseragamannya tinggi. Sedangkan indeks dominasi terlihat ada spesies rumput laut yang mendominasi pada perairan bagian barat dan timur pulau.Â Nyamuk Island is one of an island located in the western part of Karimunjawa archipelago. Seaweed and seagraas is a marine vegetation in Nyamuk Island. The highest fishing activities and the development plan of tourism facilities trigger the depressed ecological function these marine vegetation on Nyamuk Island. This study aims to identify the type and structure of the seaweed community in seagrass beds and the environmental factors of aquatic physics that affect the existence of seaweed and seagrass in the waters of Nyamuk Island. This research was conducted on August 29 to September 1, 2017, located at Nyamuk Island, District Karimunjawa, Jepara regency, Central Java Province. The material used in this research was seaweed and seagrass plants. This research parameter data taken directly (in situ). This research uses descriptive exploration method. This research was conducted on 3 different stations in the waters of Nyamuk Island, which is on the east, west and north of Nyamuk Island.Found 5 types of seaweed type Padina australis, Halimeda macroloba, Caulerpa sertulairoides, Caulerpa racemosa and Sargassum sp. and 2 species of seagrass species Enhalus acoroides and Halophila ovalis. The average total seaweed cover is 48.61% while the seagrass cover is 19.94%. The index value of diversity and uniformity of seaweed is low except in Northern Island, diversity value including medium and uniformity is high, while dominance index is seen that seaweed species dominate on Western and Eastern Island.

Pengaruh Penambahan Nitrogen dengan Konsentrasi yang Berbeda terhadap Laju Pertumbuhan Rumput Laut Caulerpa racemosa var. uvifera Budiyani, Felycia Belri; Suwartimah, Ken; Sunaryo, Sunaryo
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Caulerpa racemosa is a type of seaweed that has potentially to be cultivated because very popular and liked by most peoples. Japan and Philipines made the C. racemosa as one of the aquaculture commodities. C. racemosa culturing has not been done in Indonesia. Usually people just take directly from nature thus diminishing its presence in nature. Seaweed farming important to be done to inhance the production of seaweed. This study was conducted in May - July 2011 in a wet lab, University of Diponegoro Marine Station Teluk Awur, Jepara. The research method used an experimental method with a completely randomized design. This study used four treatments and one control, each of which was repeated three times. Rearing media using sea water plus nitrogen with different concentrations, namely: A (0 Î¼M), B (50 Î¼M), C (100 Î¼M), D (150 Î¼M) and E (200 Î¼M). The results showed that the addition of urea nitrogen was significant difference on the growth of C. racemosa var. uvifera (p <0.01). The average of weight gain of C. racemosa var. uvifera for 42 days, as follows: A = 3.38 Â± 0.089 g, B = 3.46 Â± 0.14 g; C = 3.59 Â± 0.18 g; D = 3.44 Â± 0.11 g and E = 3.42 Â± 0.10 g. Specific growth rate of C. racemosa var. uvifera generated during the study, namely: A 0.60 Â± 0.015 % per day; B of 0.94 Â± 0.012% per day; C of 1.36 Â± 0.024% per day; D of 0.84 Â± 0.026% per day and E of 0.75 Â± 0.028% per day. The lowest specific growth rate of C. racemosa var. uvifera was reached on the treatment of A and the highest in the treatment of C.

Kajian Kesesuaian dan Daya Dukung Wilayah Pesisir Pantai Bandengan Jepara, sebagai Upaya Optimalisasi Pengembangan Kegiatan Wisata Bahari Budhiawan, Gigih; Indarjo, Agus; Suryono, Suryono
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Bandengan Beach is quite famous and become mainstay Jepara Regency until be destination is quite popular, not only for Jepara people but also majority Central Java People. Nowadays, tourism activities in Bandengan Beach very limited recreation, enjoy to the landscape beach, and swimming. While still many potential area not yet be used maximum. This Study intend to assign suitable location for development marine tourism activity, know extents area development and capacity unit area that intended of tourism activity water sports. The Research results represent that tourism activities in Bandengan Beach Jepara Regency potential to be developed tourism especially water sports. Suitable location is 200 m from the shoreline towards middle sea at depth of > 5 meters. This area has a category S1 (very suitable) with values IKW 87.50 %. Tourism activities that can be developed among others, Flying Fish and Rolling Donuts in addition to existing tourist activities in advance Jet Ski and Banana Boat. The area that can be used is 74.000 m2 around 7.4 hectares and has a capacity of maximum expected around 148 person Jetski and 148 person Banana Boat tourist effective daily.

Analisis Parameter Fisika dan Kimia Karaginan Kappaphycus alvarezii Doty 1985 (Florideophyceae : Solieriaceae) Dengan Variasi Ekstraksi dari Perairan Bluto Wulandari, Nursiana Suci; Pramesti, Rini; Susanto, AB.
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Kappaphycus alvarezii merupakan rumput laut merah penghasil karaginan yang dimanfaatkan dalam berbagai industri dan diperoleh melalui ekstraksi. Ekstraksi umumnya menggunakan larutan alkali sebagai pelarut dalam proses pemanasan maupun perendaman. Ekstraksi tanpa larutan alkali masih jarang dilakukan. Ekstraksi cara alkali, non-alkali maupun pre-treatment alkali mempengaruhi kualitas karaginan sehingga penelitian ini perlu dilakukan. Tujuan penelitian untuk memperoleh karaginan kualitas terbaik dari 3 metode ekstraksi. Parameter yang diambil meliputi rendemen, kadar air, kadar abu, kekuatan gel, viskositas dan analisis FTIR. Karaginan dihasilkan melalui ekstraksi secara alkali dengan pemanasan KOH, pre-treatment alkali dengan perendaman KOH sebelum pemanasan dan ekstraksi native pemanasan dengan air suling. Hasil penelitian didapatkan nilai rendemen terbaik dengan metode alkali (36,68Â±2,33%). Kadar air terbaik metode pre-treatment (3,91Â±0,84%). Kadar abu terbaik metode alkali (32,7Â±2,42%). Kekuatan gel terbaik dengan metode alkali (519Â±29,01g/cm2). Viskositas terbaik metode native (70,43Â±0,74 cPs). Hasil FTIR menunjukkan sampel yang dihasilkan jenis kappa karaginan.Â Kappaphycus alvarezii produces carrageenan which is widely used for industrial and obtained through extraction. Generally the extraction is using an alkaline solution as a solvent of heating or soaking process. Extraction without alkaline solution is infrequently performed. Different extraction methods affect the quality of the carrageenan, therefore the research has to be done. The purpose of this research is to obtain the best quality carrageenan from 3 different extraction methods. The parameters performed yield, water content, ash content, gel strength, viscosity and FTIR analysis. Carrageenan are produced through alkaline extraction treatment with KOH, pre-treatment alkaline with KOH and native extraction with distilled water. The results showed the best yield was alkaline method (36.68Â±2.33%), the best water content was pre-treatment method (3.91Â±0.84%), the best ash content was the alkaline method (32.7Â±2.42%), the best gel strength was the alkaline method (519 Â± 29.01g/cm2), the best viscosity was the native method (70.43Â±0.74 cPs). Analysis FTIR showed the samples produced kappa carrageenan.

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