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Journal of Marine Research
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
Arjuna Subject : -
Articles 687 Documents
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Pengembangan Awal Formula Empiris Berbasis Proses Penyebaran Sedimen Tersuspensi Di Perairan Pesisir Tanara Delilla Suhanda; Totok Suprijo; Budhy Soeksmantono
Journal of Marine Research Vol 12, No 2 (2023): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v12i2.35692

Abstract

Transport sedimen tersuspensi adalah salah satu proses yang terjadi di wilayah pesisir khususnya estuari. Tujuan dari penelitian ini adalah mengetahui algoritma pengukuran konsentrasi sedimen tersuspensi menggunakan data citra Landsat yang sesuai untuk Perairan Tanara berdasarkan pengukuran in-situ. Metode purposive sampling dipilih untuk menentukan lokasi sampling di enam stasiun pada tanggal 10 April 2012. Pengambilan sampel dilakukan menggunakan bottle sampler (botol Nansen) secara langsung pada kedalaman 0,2d. Pengolahan sampel lapangan diolah dengan metode SNI 03-3961-1995 untuk mengetahui jumlah berat sedimen melayang dalam air. Selanjutnya pengolahan data citra satelit menggunakan Landsat 8 dilakukan dengan koreksi radiometrik, atmosferik, dan aplikasi algoritma sedimen tersuspensi yang telah dikembangkan oleh Budhiman (2004) untuk mengetahui hasil yang paling mendekati nilai data lapangan dari ketiga algoritma tersebut. Dari hasil pengolahan data dan analisa validasi menggunakan Root Mean Square Error (RMSE) dari data in-situ dengan ketiga algoritma tersebut bernilai 16,85. Setelah dilakukan modifikasi algoritma yang dikembangkan oleh Budhiman (2004) nilai RMSE menjadi 8,61. Modifikasi algoritma diaplikasikan pada data citra dari tahun 2013–2015. Sebaran konsentrasi sedimen tersuspensi di Perairan Tanara yang dipengaruhi dominan oleh aliran debit sungai. Suspended sediment transport is one process that occurs in coastal areas, especially estuaries. This study aimed to determine the algorithm for measuring suspended sediment concentration using Landsat imagery data that was suitable for Tanara Waters based on in-situ measurements. The purposive sampling method was chosen to determine sampling locations at six stations on April 10, 2012. Sampling was carried out using a bottle sampler (Nansen bottle) directly at a depth of 0.2d. Field samples were processed using the SNI 03-3961-1995 method to determine the water's total weight of suspended sediment. Furthermore, the processing of satellite image data using Landsat 8 is carried out with radiometric correction, atmospheric correction, and the application of the suspended sediment algorithm that has been developed by Budhiman (2004)) to find out the results that are closest to the value. Field data from the three algorithms. From the data processing and validation analysis results using the Root Mean Square Error (RMSE) from in-situ data with the three algorithms, the value is 16.85. After modification of the algorithm developed by Budhiman (2004), the RMSE value became 8.61. Algorithm modification was applied to image data from 2013 – 2015. Spontaneous sediment concentration distribution in Tanara Waters is influenced by river flow.
Index of Seagrass Ecology at Prawean Beach, Jepara Anggi Rahmadani Kusumaningtyas; Suryono Suryono; Ambariyanto Ambariyanto
Journal of Marine Research Vol 12, No 2 (2023): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v12i2.35482

Abstract

Seagrass ecosystems are limited by several environmental factors, namely temperature, light, salinity, depth, primary substrate, nutrients and movement of seawater (waves, currents, tides). The type of substrate can cause differences in the composition of seagrass species and affect differences in the fertility and growth of each kind of seagrass. Seagrasses are suitable for living on muddy, sandy, loam, or substrates with coral fragments and rock crevices. This study aims to determine the ecological index of seagrass in Prawean Beach, Jepara. The research was conducted using an exploratory descriptive method. The study was carried out in November 2021. The materials used in this study were sediment and seagrass samples. The research was carried out in November 2021. Identification of seagrass species using the LIPI method and grain size analysis of sediments using the granulometric method. PCA analysis aims to determine the variables of ecological factors that affect the ecological index of seagrass. PCA analysis will show necessary information regarding the relationship between variables in one graph. The results obtained four seagrass types: Thalassia hemprichii, Enhalus acoroides, Cymodocea serrulata and Cymodocea rotundata. The species density value is classified as relatively dense and the species cover value is classified as less rich/unhealthy with the type of sediment in the form of fine sand. PCA analysis resulted in 3 main factors formed, namely: F1) Enhalus acoroides cover, gravel, silt, temperature, pH and current; F2) Sand and salinity; and F3) Density and cover of Cymodocea rotundata.
Analysis Of Mangrove Vegetation Condition Using Hemispherical Photography Method In Simeulue District Mai Suriani; Opinda Sakbania Ulma; Ika Kusumawati
Journal of Marine Research Vol 12, No 2 (2023): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v12i2.36308

Abstract

Pusat Restorasi dan Pembelajaran Mangrove adalah sebuah program yang dibentuk oleh Kementerian Kelautan dan Perikanan Republik Indonesia dan bertujuan untuk merehabilitasi ekosistem mangrove yang melibatkan masyarakat dalam pengelolaannya serta menjaga dan memelihara ekosistem mangrove dengan dijadikannya tempat sarana edukasi, penelitian maupun wisata. Penelitian dilakukan pada tahun 2022 di Pusat Restorasi dan Pembelajaran Mangrove Kabupaten Simeulue. Parameter yang diamati yaitu kerapatan mangrove, persentase tutupan kanopi dan tinggi pohon mangrove. Analisis data foto hemisphere menggunakan aplikasi Image J untuk mendapatkan nilai persentase tutupan kanopi, Pengukuran tinggi pohon menggunakan aplikasi protractor. Hasil penelitian menunjukkan  kerapatan pohon mangrove tergolong dalam kategori sedang dan jarang dengan status baik dan rusak. Berdasarkan persentase tutupan kanopi tergolong status baik dengan persentase tutupan kanopi kategori sedang. Distribusi tinggi pohon mangrove terbagi ke dalam 7 kelas dimana setiap stasiun didominasi oleh kelas ketinggian yang berbeda-beda. The Mangrove Restoration and Learning Center is a program established by the Ministry of Marine Affairs and Fisheries of the Republic of Indonesia and aims to rehabilitate mangrove ecosystems that involve the community in their management and maintain and maintain mangrove ecosystems by making them a place for education, research, and tourism. The research was conducted in 2022 at the Mangrove Restoration and Learning Center, Simeulue Regency. Parameters observed were mangrove density, percentage of canopy cover, and mangrove tree height. Hemispheric photo data analysis used the Image J application to get the percentage value of canopy cover, tree height measurements were made using the protractor application. Based on the percentage of canopy cover, it is classified as good status with the percentage of canopy cover being in the medium category. The distribution of mangrove tree height is divided into 7 classes where different altitude classes dominate each station.
Profil Fitokimia Ekstrak Metanol Batang Clerodendrum inerme Menggunakan Metode KLT dan Penapisan Aktivitas Antimikroba Prasetyana Ajeng Refamurty; Wilis Ari Setyati; Mada Triandala Sibero
Journal of Marine Research Vol 12, No 2 (2023): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v12i2.34231

Abstract

Clerodendrum inerme merupakan salah satu jenis mangrove yang masih jarang dikaji. Berdasarkan hasil penelitian sebelumnya ekstrak daun C. inerme memiliki potensi sebagai antibakteri. Penelitian ini bertujuan untuk menemukan sumber antibakteri alami dari batang mangrove C. inerme. C. inerme dikoleksi dari perairan Teluk Awur Jepara. Pelarut etil asetat digunakan untuk mengesktrak metabolit sekunder dari batang C. inerme. Metode paper disc diffusion digunakan pada uji antibakteri terhadap beberapa bakteri patogen, seperti Bacillus cereus, B. subtilis dan Escherichia coli. Metode fitokimia dan Kromatografi Lapis Tipis (KLT) digunakan untuk mengkarakterisasi ekstrak kasar batang C. inerme. Berdasarkan hasil karakterisasi metabolit, ekstrak kasar batang C. inerme mengandung tanin, alkaloid dan fenolik. Studi ini menunjukan bahwa ekstrak batang C. inerme tidak potensial sebagai agen antibakteri. Clerodendrum inerme is a type of mangrove that is still rarely studied. Previous studies reported that C. inerme leaf extract has potential as an antibacterial agent. This study aimed to investigate the antibacterial activity from C. inerme bark. C. inerme was collected from Teluk Awur Jepara. Ethyl acetate solvent was used to extract the secondary metabolites. The paper disc diffusion method was utilized in the antibacterial test against several pathogenic bacteria, such as Bacillus cereus, B. subtilis, and Escherichia coli. Phytochemical test and Thin Layer Chromatography (TLC) were performed to characterize the crude extract of C. inerme bark. Based on the results of the metabolite characterization, the crude extract of C. inerme bark contained tannins, alkaloids and phenolics. This study showed that the C. inerme bark extract was not potential as an antibacterial agent.
Kajian Distribusi Fitoplankton Kaitannya dengan Kesuburan Perairan Pantai Kartini dan Muara Wiso Jepara Azhari Nourma Dewi; Hadi Endrawati; Widianingsih Widianingsih
Journal of Marine Research Vol 12, No 2 (2023): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v12i2.35240

Abstract

Fitoplankton adalah salah satu organisme yang penting dalam kehidupan di laut dan berperan sebagai produktivitas primer. Keberadaan fitoplankton di suatu perairan dapat memberikan informasi mengenai keadaan perairan. Perairan yang memiliki tingkat kesuburan yang baik, akan diindikasikan dengan keberadaan fitoplankton yang melimpah. Salah satu ekosistem perairan yang menjadi habitat fitoplankton adalah perairan Kartini Jepara. Tingkat kesuburan dan kualitas perairan Kartini Jepara dapat diketahui dengan dilakukannya perhitungan kelimpahan dan distribusi fitoplankton yang berkaitan dengan kemerataan fitoplankton. Tujuan dari penelitian ini adalah untuk mengetahui kelimpahan dan distribusi fitoplankton di Perairan Pantai Kartini dan Muara Wiso Jepara sehingga dapat memberikan informasi mengenai kesuburan perairan tersebut. Metode penelitian yang digunakan adalah eksploratif dan penentuan lokasi sampling menggunakan metode purposive sampling. Kelimpahan rata-rata fitoplankton pada pantai Kartini adalah 1335,99 sel/L sedangkan pada Muara Wiso adalah 311,18, sehingga keduanya termasuk perairan dengan tingkat kesuburan oligotrofik. Hasil dari penelitian ini menunjukkan bahwa kelas Bacillariophyceae sering ditemukan selama pengamatan. Pola distribusi fitoplankton menunjukkan kategori seragam (uniform) dengan nilai distribusi rata-rata 0,01 pada Perairan Pantai Kartini dan 0,08 pada Perairan Muara Wiso.  Phytoplankton is one type of living creature that is important in life in the ocean and plays a role as primary productivity. The presence of phytoplankton in a body of water can provide information about the state of the waters. Waters that have a good fertility rate, will be indicated by the presence of abundant phytoplankton. One of the aquatic ecosystems that become phytoplankton habitat is Kartini Jepara waters. The level of fertility and water quality of Kartini Jepara can be known by calculating the abundance and distribution of phytoplankton related to the condition of these waters. The purpose of this study was to determine the abundance and distribution of phytoplankton in coastal waters of River Mouth Wiso and Kartini Waters, Jepara and also giving information about the fertility of these waters. The research method used is descriptive analysis and determination of sampling locations using purposive sampling method. The results of this study indicate that the class of Bacillariophyceae is often found during observation. The average abundance of phytoplankton in Kartini Waters is 1335.99 cells/L while in Wiso estuary is 311.18, so both are waters with oligotrophic fertility. Phytoplankton distribution pattern shows uniform category with an average distribution value of 0.01 at Kartini beach and 0.08 at Wiso estuary.
Analisis Biometri dan Laju Pertumbuhan Kerang Hijau (Perna viridis) yang Dibudidayakan Dalam Karamba Apung di Laut Jawa Desa Banyuurip Kecamatan Ujungpangkah Anfa'u Mazida; Aminin Aminin; Farikhah Farikhah
Journal of Marine Research Vol 12, No 2 (2023): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v12i2.36270

Abstract

Kerang hijau adalah komoditas laut endemik perairan Indonesia yang bernilai ekonomis penting dan potensial dijadikan sebagai objek eduwisata terkait aspek biologis dan habitatnya yang terintegrasi dengan ekosistem hutan mangrove.  Desa Banyuurip memiliki potensi kerang hijau melimpah yang telah lama dibudidayakan oleh nelayan tradisional di Laut Jawa, berdekatan dengan area ekowisata Banyuurip Mangrove Center (BMC), sehingga perlu diujicobakan kerang hijau yang dibudidayakan dalam unit karamba apung sebagai objek eduwisata. Tujuan penelitian adalah menganalisis pertumbuhan dan hasil panen kerang hijau dalam karamba apung yang dioperasikan pada koordinat 06°52'18.84" LS dan 112°29'41.19" BT di Laut Jawa Desa Banyuurip Kecamatan Ujungpangkah.  Karamba apung memiliki area terang dan area gelap terkait dengan penerimaan cahaya matahari di kolom air, dimana area gelap terjadi akibat penutupan permukaan karamba apung yang diperuntukkan sebagia area catwalk agar area karamba mudah diiakses bagii siapa pun yang berkunjung ke sana.  Metode penelitian ini adalah deskriptif dan sampel diambil secara purposive random sampling.  Sampel kerang hijau dari area terang (n= 4354) dan (gelap n=2416) dianalisis aspek biometri, laju pertumbuhan, dan biomassa panen. Parameter kualitas air diukur secara berkala. Uji t (α=5%) digunakan untuk menetapkan perbedaan rerata variabel populasi dari area terang dan gelap. Aspek biometri lebar di area terang (17,69±3,99 mm) berbeda nyata (P<0.05) dari lebar di area gelap (17,14±3,76 mm), tinggi di area terang (11,75±2,86 mm) berbeda nyata (P<0.05) dari tinggi di area gelap (11,32±2,78 mm). Nilai ‘b” hubungan aspek biometri memiliki pola pertumbuhan allometric negative atau (b< 3) dimana pada area terang 2.39 dan area gelap 2.45. SGR pada area terang 1.57%/hari dan pada area gelap 1,55%/hari. Hasil panen pada area terang berkisar antara 3414–4992 g sedangkan pada area gelap 3331 – 3530 g, yang berkaitan dengan luasan dan jumlah tali kolektor di kedua area. Parameter kulitas air pada lokasi tersebut meliputi suhu 27,83±0.980C, pH 7,17±0.75 ppm, DO 6,92±0,74 mg/l, kecerahan 152±31,07 cm, dan salinitas 24,17±1,47 ppt masih dalam kondisi optimal untuk pertumbuhan kerang hijau. Berdasarkan hasil penelitian, disimpulkan bahwa hasil panen berdasarkan aspek biometri kerang hijau di area terang lebih baik dari pada di area gelap sedangkan laju pertumbuhan di area terang sama dengan di area gelap. Hasil penelitian ini diharapkan menjadi bahan rekomendasi bagi perekayasaan unit karamba apung yang diperuntukkan bagi aktivitas eduwisaata. Green mussels are endemic marine commodities in Indonesian waters that have significant economic value and potential as educational tourism objects related to their biology and habitat aspects integrated with mangrove forest ecosystems. The traditional fishermen in Banyuurip Village cultivated it many years ago in the Java Sea, adjacent to the Banyuurip Mangrove Center (BMC) ecotourism area, so it is necessary to test green mussels cultivated in floating cage units as an educational object. The study aimed to analyze the growth and yield of mussels in floating cages operated at coordinates 06°52'18.84" South Latitude and 112°29'41.19" East Longitude in the Java Sea, Banyuurip Village, Ujungpangkah District. Floating cages have bright areas and dark areas related to the reception of sunlight in the water column. Dark areas occur due to the closure of the floating cage surface, which is designated as a catwalk area so that the cage area is easily accessible to anyone. This research method is descriptive, and the sample is taken by purposive random sampling. Green mussel samples from bright (n=4354) and (dark n=2416) areas were analyzed for biometric aspects, growth rate, and harvested biomass. Air quality parameters are measured regularly. The t-test (α=5%) is used to determine the difference in the mean of the population variables from the light and dark areas. The biometric aspect of width in the bright area (17.69±3.99 mm) is significantly different (P<0.05) from the width in the dark area (17.14±3.76 mm), height in the bright area (11.75±2, 86 mm) was significantly different (P<0.05) from the height in the dark area (11.32±2.78 mm). The value of 'b' about biometric aspects has a negative allometric growth pattern or (b < 3) where the light area is 2.39 and the dark area is 2.45. SGR in bright areas is 1.57%/day and in dark areas is 1.55%/day. Yields in the light area ranged from 3414 – 4992 g, while in the dark area, it was 3331 – 3530 g, which relates to the area and the number of gathering ropes in both areas. Water quality parameters at that location include temperature 27.83 ± 0.980C, pH 7.17 ± 0.75 ppm, DO 6.92 ± 0.74 mg/l, brightness 152 ± 31.07 cm, and salinity 24.17 ± 1 .47 ppt is still in optimal conditions for the growth of mussels. Based on the study results, the yield based on biometric aspects of green mussels in bright areas is better than in dark areas, while the growth rate in bright areas is the same as in dark areas. The results of this study are expected to become recommendations for the engineering of floating cage units intended for educational activities. 
Nilai Simpanan dan Harga Karbon Ekosistem Mangrove Desa Pasar Banggi, Rembang, Jawa Tengah Fifi Nur Hidayah; Subagiyo Subagiyo; Adi Santoso
Journal of Marine Research Vol 12, No 2 (2023): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v12i2.34616

Abstract

Pemanasan global merupakan salah satu fenomena alam  yang sedang berlangsung dan disebabkan oleh adanya peristiwa efek rumah kaca. Penyebab terjadinya efek rumah kaca diantaranya adalah meningkatnya konsentrasi gas Karbondioksida (CO2) di atmosfer. Hutan mangrove berperan sebagai upaya mitigasi akibat dari pemanasan global karena salah satu fungsi dari hutan mangrove adalah sebagai penyimpan karbon (C). Tujuan dari peneitian ini secara umum dilakukan untuk mengevaluasi simpanan karbon pada rehabilitasi mangrove desa Pasar Banggi. Metode yang digunakan pada penelitian ini adalah metode deskriptif yang dilakukan pada tiga stasiun. Masing-masing stasiun dibagi menjadi tiga plot yang bertujuan untuk menghitung nilai biomassa menurut rumus alometrik. Estimasi simpanan karbon pada substrat didapat dari pengambilan sampel sedimen di setiap stasiun yang selanjutnya dilakukan analisis kandungan bahan organik dengan metode LOI (Loss on Ignation) di Laboratorium Nutrisi dan Pakan Universitas Diponegoro. Setelah mendapatkan hasil nilai simpanan karbon pada tegakan dan substrat kemudian dilakukan perhitungan nilai ekonomi karbon. Berdasarkan hasil penelitian di Ekosistem Mangrove Desa Pasar Banggi didapatkan nilai simpanan karbon pada tegakan sebesar 74.986,95 ton/ha pada substrat sebesar 202,61 ton/ha. dan untuk nilai ekonomi sebesar Rp 6.302.937 untuk harga pasar sukarela dan untuk harga pasar wajib sebesar Rp 16.476.737.063,5. Hasil tersebut menunjukkan bahwa nilai simpanan karbon dan nilai ekonomi mangrove di Desa Pasar Banggi Jumlahnya sangat Besar dan mampu menjadi salah satu solusi untuk perubahan iklim.Global warming is an ongoing natural phenomenon caused by the greenhouse effect. One of the causes of the greenhouse effect is the increased concentration of carbon dioxide (CO2) in the atmosphere. Mangrove forests act as mitigation efforts due to global warming because one of the functions of mangrove forests is to store carbon (C). The purpose of this research is generally to evaluate carbon storage in the mangrove rehabilitation of the Pasar Banggi Village. The method used in this study is a descriptive method which was carried out at three stations with different mangrove conditions. Each station is divided into three plots which aim to calculate the biomass value according to the allometric formula. Estimation of carbon deposits on the substrate was obtained from sediment sampling at each station which was then analyzed for organic matter content using the LOI (Loss on Ignation) method in the Nutrition and Feed Laboratory of Diponegoro University. After getting the results of the carbon storage value in the stand and substrate, then the calculation of the economic value of carbon is carried out. Based on the results of research in the Mangrove Ecosystem of Pasar Banggi Village, the value of carbon stored in the stands was 74,986.95 tons/ha on a substrate of 202.61 tons/ha. And for the economic value of Rp. 6,302,937 in the voluntary market and for the mandatory market, it is Rp. 16,476,737,063.5. These results indicate that the value of carbon storage and the economic value of mangroves in the Pasar Banggi Village is very large and can be one of the solutions for climate change.
Logam Berat Timbal (Pb) Pada Air, Sedimen, dan Kerang Darah (Anadara Granosa) di Muara Sungai Loji dan Perairan Pantai Sekitarnya, Kota Pekalongan Rahma Nur Kharisma; Bambang Yulianto; Ria Azizah Tri Nuraini
Journal of Marine Research Vol 12, No 2 (2023): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v12i2.36375

Abstract

: Kota Pekalongan merupakan sentra industri batik yang besar di Indonesia. Kegiatan industri batik di Pekalongan menjadi salah satu penghasil limbah cair sisa pewarna batik yang mengandung logam berat yang mencemari lingkungan perairan sungai-sungai. Penelitian kandungan logam Pb pada aliran dan muara Sungai Loji dan Perairan Pantai Pekalongan dilakukan pada Februari-Maret 2022. Sampel air, sedimen, dan kerang darah (Anadara granosa) dianalisis menggunakan Spektrofotometri Serapan Atom (AAS) di Laboratorium Departemen Teknik Lingkungan, Universitas Diponegoro, Semarang. Lokasi penelitian dibagi menjadi 5 stasiun yang mewakili daerah terdampak limbah pewarna batik, yaitu pada aliran sungai, Tempat Pelelangan Ikan, muara sungai, perairan laut dangkal, dan perairan laut dalam. Hasil penelitian menunjukkan kandungan logam berat timbal (Pb) pada air berkisar antara 0,06-0,70 mg/l, pada sedimen berkisar antara 23,23-157,07 mg/kg, dan dalam jaringan lunak kerang darah berkisar antara 25,65-46,25 mg/kg. Faktor biokonsentrasi logam berat Pb pada kerang darah terhadap air berkisar antara 41,51-366,43. Batas aman konsumsi kerang darah yang dipanen dari Perairan Pantai Pekalongan berkisar antara 0,032-0,058 kg/minggu. Disimpulkan bahwa logam berat Pb pada air, sedimen, dan kerang darah (Anadara granosa) pada Muara Sungai Loji dan Perairan Sekitarnya, Kota Pekalongan termasuk dalam kategori telah tercemar karena telah melebihi batas baku mutu yang telah ditetapkan.  Pekalongan City is a large batik industry center in Indonesia. The batik industry activity in Pekalongan is one of the producers of liquid waste from batik dye residue, which contains heavy metals that pollute the aquatic environment. The study of Pb metal content in the flow and estuary of the Loji River and Pekalongan Coastal Waters was carried out in February-March 2022. Water, sediment, and samples of Anadara granosa were analyzed using Atomic Absorption Spectrophotometry (AAS) at the Laboratory of the Department of Environmental Engineering, Diponegoro University, Semarang. The research location is divided into five stations representing areas affected by batik dye waste: river flows, Fish Auction Places, river estuaries, shallow sea waters, and deepsea waters. The results showed that the heavy metal content of lead (Pb) in the water ranged from 0.06-0.70 ppm; in the sediment, it ranged from 23.23-157.07 ppm; and in the soft tissue of blood mussels, it ranged from 25.65-46.25 ppm. The bioconcentration factor of heavy metal Pb in blood clams to water ranged from 41.514-366.428. The safe limit for consumption of blood clams in Pekalongan waters ranges from 0.032-0.058 kg/week. It is concluded that the heavy metal Pb in water, sediment, and blood mussels (Anadara granosa) at the Loji River Estuary and the surrounding waters, Pekalongan City is in the polluted category because it has exceeded the quality standard limit that has been set.
Dimorfisme Seksual dan Hubungan Panjang-Berat Ikan Sidat (Anguilla sp.) di Perairan Nusawungu, Kabupaten Cilacap Pramudya Rachadiansyach Putra; Munasik Munasik; Nur Taufiq-Spj
Journal of Marine Research Vol 12, No 2 (2023): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v12i2.35725

Abstract

Banyak penelitian yang telah dilakukan pada ikan sidat. Namun, infomarsi mengenai dimorfisme seksual dan hubungan panjang berat pada ikan sidat belum banyak diketahui, khususnya di Indonesia. Keterbatasan literatur mengakibatkan informasi mengenai dimorfisme seksual dan hubungan panjang berat ikan sidat kurang menyeluruh. Penelitian ini dilakukan untuk memberikan informasi mengenai dimorfisme seksual serta hubungan panjang-berat pada ikan sidat di Perairan Nusawungu, Kabupaten Cilacap. Pengamatan dan pengukuran sampel menggunakan metoda morfometrik. Data morfometrik ikan sidat dianalisa menggunakan regresi linier berganda untuk mengetahui hubungan signifikan antara data morfometrik ikan sidat dengan jenis kelaminnya. Hasil analisis regresi menunjukkan karakter morfologi seperti panjang kepala (HL), batang tubuh (TR), mata menonjol (PE) dan rahang bawah (LJ) memiliki pengaruh signifikan terhadap jenis kelamin ikan sidat. Oleh karenanya, karakter morfologi tersebut diduga menjadi parameter dalam mencirikan antara ikan sidat jantan dan ikan sidat betina. Hubungan panjang-berat ikan sidat adalah W = 0,0008L3,194 dengan nilai r yang diperoleh sebesar 0,933 dan nilai R2 sebesar 0,964 atau 96,4%. Hasil ini menunjukkan bahwa pola pertumbuhan ikan sidat bersifat alometrik positif. Tingginya nilai korelasi yang diperoleh dari analisis hubungan panjang-berat ikan sidat menyatakan bahwa terdapat hubungan yang sangat erat antara panjang ikan dan berat ikan serta 96,4% pertambahan berat pada sampel sidat terjadi dikarenakan pertambahan panjang tubuh sidat tersebut, sedangkan sisanya terjadi karena faktor lain seperti tingkat pertumbuhan, habitat atau preferensi makanan. Many studies have been conducted on eels. However, information about sexual dimorphism and length-weight relationship in eel is not widely known, especially in Indonesia. The limited literature results in less comprehensive information on sexual dimorphism and the relationship between length and weight of eel. This study was conducted to provide information about sexual dimorphism and length-weight relationship in eels in Nusawungu waters, Cilacap Regency. Observation and measurement of samples using the morphometric method. Eel morphometric data were analyzed using multiple linear regression to determine the significant relationship between eel morphometric data and gender. The results of the regression analysis showed that morphological characters such as head length (HL), trunk (TR), prominent eyes (PE) and lower jaw (LJ) had a significant influence on the sex of eels. Therefore, this morphological character is thought to be a parameter in characterizing male and female eels. The relationship between length and weight of eel is W = 0.0008L3.194 with an r value of 0.933 and an R2 value of 0.964 or 96.4%. These results indicate that the growth pattern of eel is positive allometric. The high correlation value obtained from the analysis of the length-weight relationship of eels stated that there was a very close relationship between fish length and fish weight and 96.4% weight gain in eel samples occurred due to the increase in body length of the eel, while the rest occurred due to other factors. such as growth rate, habitat or food preferences.
Studi Karakteristik Oseanografi pada Ekologi Terumbu Karang dalam Menunjang Ekowisata di Perairan Barat Daya Pulau Tomia, Wakatobi La Ode Rasyid Ridzal; Muh. Yusuf; Heryoso Setiyono
Journal of Marine Research Vol 12, No 2 (2023): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v12i2.36232

Abstract

Perairan barat daya Pulau Tomia merupakan wilayah yang masuk Kawasan Taman Nasional Wakatobi dengan potensi sumberdaya berupa terumbu karang berbentuk gugus terumbu karang. Kajian mengenai kondisi parameter oseanografi menjadi aspek penting guna mengetahui kondisi lingkungan perairan barat daya Pulau Tomia dan merupakan langkah awal untuk menunjang ekowisata  serta melengkapi data yang masih minim sebagai sumber referensi atas kajian kelayakan aktifitas ekowisata di perairan tersebut. Parameter yang diamati terkait kesesuaian perairan di barat daya Pulau Tomia meliputi: arus, gelombang, kedalaman perairan, kecerahan, suhu, salinitas, pH, DO, dan kondisi substrat dasar perairan. Tujuan penelitian ini: (1) mempelajari karakteristik fisik kimia oseanografi, dan (2) menilai kesesuaian perairan barat daya Pulau Tomia sebagai kawasan ekowisata berdasarkan parameter fisik kimia oseanografi. Metode penelitian yang digunakan adalah metode kuantitatif. Hasil penelitian menunjukkan bahwa nilai rata rata kecepatan arus 0,34 m/s, gelombang 0.91 meter, kedalaman perairan 14.25 meter, kecerahan 2.8 meter, salinitas 32.962 ‰, pH 7.79, suhu 29.1⁰C, dan DO 14.4 mg/l. Dari hasil pengamatan karakteristik oseanografi menunjukkan skor sebesar 76,47%, berarti termasuk kategori “Cukup Sesuai”. Southwest Tomia Island are an area that is included in the Wakatobi National Park area with a potencial value in the form of coral reefs. The study of the condition of oceanographic parameters is an important aspect to determine the environmental conditions of the waters southwest of Tomia Island and is the first step to supporting ecotourism and completing the data as a reference source for the feasibility study of ecotourism activities in these waters. Parameters observed related to the suitability of the waters in the southwest of Tomia Island include: currents, waves, water depth, brightness, temperature, salinity, pH, DO, and the condition of the bottom substrate of the waters. The aims of this research: (1) to study the physical and chemical characteristics of oceanography, and (2) to assess the suitability of the waters of southwest Tomia Island as an ecotourism area based on the physical and chemical parameters of oceanography. The research method used is quantitative. The results showed that the average value of the current velocity was 0.34 m/s, the wave was 0.91 meters, the water depth was 14.25 meters, the brightness was 2.8 meters, the salinity was 32.962 ‰, the pH was 7.79, the temperature was 29.1⁰C, and the DO was 14.4 mg/l. From the observation of oceanographic characteristics, it shows a score of 76.47%, meaning that it is included in the "Sufficiently Appropriate" category.

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