Jurnal Kelautan Tropis最新文献

{"title":"Geokimia dan Asesmen Pencemaran Logam Berat Cd, Cu dan Zn pada Sedimen Permukaan Estuari Baturusa, Bangka","authors":"Mohammad Agung Nugraha, Irma Akhrianti, F. Pratiwi, Agung Priyambada","doi":"10.14710/jkt.v26i1.16467","DOIUrl":"https://doi.org/10.14710/jkt.v26i1.16467","url":null,"abstract":" The Baturusa estuary receives inputs of organic and inorganic materials from several human activities along the river. The characteristics of heavy metals such as toxicity, resistance to decomposition, and ability to accumulate in aquatic biota can indirectly have a negative impact on the health of humans who consume marine biota. The research was conducted with the aim of studying the geochemical characteristics and assessing the level of heavy metal contamination of Cd, Cu and Zn in the sediments of the Baturusa Estuary. Heavy metal fractionation was analyzed by sequential extraction. The CF value of Cu and Zn metals shows a low level of contamination, while Cd shows a moderate level of contamination. I-Geo metal Cd is in the unpolluted to moderately polluted status, while Cu and Zn are not polluted. The PLI value indicates the unpolluted category. Geochemical fractionation of heavy metals Cd, Cu and Zn Baturusa Estuary is characterized by the presence of exchangeable, carbonate, reducible, oxidizable and residual fractions. Cu and Zn mainly tend to be stored/bound to the residual fraction (mainly derived from natural sources) while Cd is more bound to the non-residual fraction (mainly derived from human/anthropogenic activities). The risk evaluation of Cd metal is very high to high risk/hazard, while Cu and Zn are not at risk/hazardous to low. These conditions indicate that Cd metal may be harmful to the environment and has a higher mobility than other metals so that it has a higher risk of being available in the body of biota.  Estuari Baturusa menerima masukan bahan organik dan anorganik dari beberapa aktivitas manusia disepanjang sungai. Karakteristik logam berat seperti toksisitas, resisten terhadap dekomposisi, dan kemampuan akumulasi terhadap biota akuatik serta secara tidak langsung dapat berdampak negatif terhadap kesehatan manusia yang mengkonsumsi biota laut. Penelitian dilakukan dengan tujuan untuk mengkaji karakteristik geokimia dan menilai tingkat kontaminasi logam berat Cd, Cu, dan Zn pada sedimen Estuari Baturusa, Bangka. Fraksinasi logam berat dianalisis dengan ekstraksi bertahap. Nilai CF logam Cu dan Zn menunjukkan tingkat kontaminasi rendah (CF<1), sedangkan Cd menunjukkan tingkat kontaminasi sedang (1≤CF<3). I-Geo logam Cd berada pada status tidak tercemar hingga tercemar sedang (0<Igeo<1), sedangkan Cu dan Zn memiliki status tidak tercemar (Igeo 0). Nilai PLI menunjukkan kategori tidak tercemar (PLI<1). Fraksinasi geokimia logam berat Cd, Cu dan Zn Estuari Baturusa dicirikan dengan adanya fraksi exchangeable, karbonat, reducible, fraksi oxidizable, dan residual. Logam Cu dan Zn utamanya cenderung tersimpan/ terikat pada fraksi residual (utamanya berasal dari sumber alami) sedangkan Cd lebih terikat pada fraksi non residual atau non resisten (utamanya berasal dari aktivitas manusia/ antropogenik). Evaluasi resiko dari logam Cd yaitu resiko/ bahaya sangat tinggi hingga tinggi, sedangkan Cu dan Zn tidak beresiko/ berbahaya h","PeriodicalId":53001,"journal":{"name":"Jurnal Kelautan Tropis","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49623938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spatial Distribution of Mantis Shrimp (Harpiosquilla raphidea) in Small-Scale Gillnet Fishery: A Case Study in Kuala Tungkal, Tanjung Jabung Barat Regency, Jambi","authors":"F. Ramdhani, S. Heltria, Ester Restiana Endang Gelis, N. Nofrizal, R. Jhonnerie, I. Zidni","doi":"10.14710/jkt.v26i1.16159","DOIUrl":"https://doi.org/10.14710/jkt.v26i1.16159","url":null,"abstract":"Mantis Shrimp is one of economically important species due to its high value for export commodities. Mantis shrimp fishing in Kuala Tungkal is categorized as small-scale fisheries. This study aims to investigate the spatial distribution of mantis shrimp catches, both the number (individuals) and body length (BL) (cm) based on the distance from the shoreline to the fishing ground. A survey method was conducted in Kuala Tungkal, Tanjung Jabung Barat Regency, Jambi Province in December 2018. The observation covered 23 fishing trips by gillnet within 437 km2. The results revealed that the spatial distribution of the average number (individuals) of mantis shrimp in various stratifications reached 28-31 individuals. However, the farther fishing ground with higher salinity levels obtained a larger average size of mantis shrimp body length (BL). In the 0-4 mile stratification, it was found that the average catch size is 17.3 cm under the first maturity size which should be 19 cm. Meanwhile, in average the observed water condition as follow temperature is 28.2oC, DO = 7.4 mg/L, pH = 7, brightness = 1.1 m, and salinity is 20.9 ppt. At the end, the result of this spatial distribution may become an input for coastal resource management strategies and can support sustainable mantis shrimp fishing efforts.","PeriodicalId":53001,"journal":{"name":"Jurnal Kelautan Tropis","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46332905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Composition, Distribution, and Fisheries Biology of Penaeid Shrimp from the Strong Wavy Waters of Southern Java, Indonesia","authors":"Rianti Pratiwi, W. Kurniawan, Ayuningtyas Indrawati, P. S. Ibrahim, Muhammad Hafizt","doi":"10.14710/jkt.v26i1.15758","DOIUrl":"https://doi.org/10.14710/jkt.v26i1.15758","url":null,"abstract":"Penaeidae is a family of shrimp that has a high economic value, leading to intensive exploitation in many areas. This research was conducted to ascertain the composition, distribution, and fisheries biology of Penaeid shrimps in the strong wavy water of southern Java Island, Indonesia. The research locations were the water of Eastern, Central, and Western Java. Shrimp samples were obtained using various ways. The carapace length (CL) of the shrimps were measured using plastic callipers and recorded to the nearest 1 mm. The results showed that eight species of shrimps were caught in the water of southern Java, with Penaeus merguiensis, P. semisulcatus, and P. monodon being the most common. The species P. merguiensis was found in each sampling location, while P. latisulcatus and Metapenaeus palmensis were only present at Drini Beach (Central Java). The results also showed that P. japonicus and M. lysianassa were only found at Ranca Buaya Beach (West Java). The species P. merguiensis and P. monodon were the two most commercially important species. The distributions of the shrimps were related to the water physical characteristics associated with the shrimp habitat namely SST, bathymetry, and tides. Fishery biology analysis found that the length at first impregnation of P. merguiensis at Damas and Sidem Water (East Java) was 25.9 cm CL. Furthermore, the LBSPR analyses revealed that the spawning capacity of P. merguiensis and M. ensis in the same waters were still very high under the current level of exploitation. Therefore, the magnitude of fishing has not endangered the sustainability of the two shrimps. ","PeriodicalId":53001,"journal":{"name":"Jurnal Kelautan Tropis","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45269179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Kandungan Total Fenolik dan Nilai Sun Protection Factor Ekstrak Sargassum sp.","authors":"Dimas Dharmawan, N. A. Putriana, S. Anggraeni","doi":"10.14710/jkt.v26i1.15934","DOIUrl":"https://doi.org/10.14710/jkt.v26i1.15934","url":null,"abstract":"Seaweed or macroalgae is one of the natural products with biological activities such as antioxidant, antibacterial, and immunostimulant. One of them is the brown alga Sargassum sp. This brown alga produces secondary metabolites such as flavonoids and their derivatives as well as polyphenols. These compounds have many roles in counteracting ultraviolet radiation and have the potential to be developed as active ingredients of sunscreen. This study aimed to determine the total phenolic content and the Sun Protection Factor (SPF) value of Sargassum sp. originating from Pameungpeuk beach, Garut Regency. The SPF value is used to categorize how efficiently a material prevents exposure to ultraviolet radiation. Total phenolic content was measured using Follin Ciocalteu reagent with gallic acid standard. The Sargassum sp extract sample contained total phenolic of 149,04±5,14 mg GAE/g. The SPF value of Sargassum sp extract was calculated using the Mansur equation at a wavelength of 290-320 nm. The obtained SPF value of extract was 33,2±3,11 which equals to oxybenzone. The value indicated an ultra-protection capability and the potency of extract for further development as UV filter.   Rumput laut atau makroalga merupakan salah satu bahan alam dengan aktivitas biologis seperti antioksidan, aktivitas antibakteri dan imunostimulan. Salah satunya adalah alga cokelat  jenis Sargassum sp. Alga cokelat ini menghasilkan metabolit sekunder seperti  flavanoid  dan turunannya serta polifenol dan turunannya. Senyawa-senyawa tersebut banyak berperan dalam menangkal radiasi ultraviolet dan berpotensi dikembangkan sebagai bahan aktif tabir surya. Penelitian ini bertujuan untuk mengetahui kandungan total fenolik dan nilai Sun Protection Factor (SPF) dari Sargassum sp yang berasal dari pantai Pameungpeuk, Kabupaten Garut. Kandungan total fenolik diukur dengan menggunakan reagen Follin Ciocalteu dan menggunakan standar baku asam galat. Sampel ekstrak Sargassum sp mengandung total fenolik sebesar 149,04±5,14 mg GAE/g. Nilai SPF digunakan untuk mengkategorikan seberapa efisien sebuah bahan dalam menangkal paparan radiasi sinar ultraviolet. Nilai SPF ekstrak Sargassum sp dihitung menggunakan menggunakan persamaan Mansur pada panjang gelombang 290-320 nm. Nilai SPF yang didapatkan yaitu 33,2±3,11 yang tergolong ke dalam kategori ultra.","PeriodicalId":53001,"journal":{"name":"Jurnal Kelautan Tropis","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42849651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Environmental Characteristic of Phyllophorus sp. (Echinodermata, Holothuroidea, Phyllophoridae) Habitat in the Madura Strait, Indonesia","authors":"Widianingsih Widianingsih, Retno Hartati, Hadi Endrawati","doi":"10.14710/jkt.v26i3.15064","DOIUrl":"https://doi.org/10.14710/jkt.v26i3.15064","url":null,"abstract":"Information on the environmental characteristics of many sea cucumber habitat is limited, despite these species exhibiting rapid exploitation and may lead to depletion. The present study combined a survey on many seawaters and sediment characteristics of habitat valuable aspidochirote holothurian, Sea Ball Cucumber, Phyllophorus sp. to compare with location with no sea cucumber in Madura Strait, Indonesia. Data from detailed surveys were used to compare both locations with measures of physical and chemical seawater parameters including temperature, salinity, dissolved oxygen, pH, phosphate, nitrate, ammonia, chlorophyll-a, total suspended solids, light transparency, and depth of water. The comparison was also carried out on physical and chemical parameters of surface sediment, i.e. phosphate, nitrate, ammonia, chlorophyll-a, grain size, total organic matter, and carbon-organic content. The data then were analyzed using Mann-Whitney U-Non Parametric Test with SPSS v. 16. The result revealed that there were significant differences between sediment characteristics of Sea Ball Cucumber habitat and no Sea Ball cucumber location, but not for seawater. Seawater parameter value in Madura Strait showed in the range required for its life. This analyzes proved the importance of sediment characteristics for Phyllophorus sp. As benthic deposit feeders, they did not only utilize substrate underneath the body for its habitat but also primarily to supply their natural food.","PeriodicalId":53001,"journal":{"name":"Jurnal Kelautan Tropis","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136377790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of Satellite-Derived Bathymetry Algorithm Accuracy Using Sentinel-2 Multispectral Satellite Image","authors":"Muhammad Iqra Prasetya, V. Siregar, S. B. Agus","doi":"10.14710/jkt.v26i1.16050","DOIUrl":"https://doi.org/10.14710/jkt.v26i1.16050","url":null,"abstract":"The utilization of satellite image data and image data processing techniques has become an efficient alternative to obtain bathymetric data in a broad and complicated area. This study aimed to determine the algorithm's performance in the waters of Lambasina Island. Atmospheric and radiometric correction using the Dark Object Subtraction (DOS) method for initial processing of Sentinel-2 images. The multispectral channel used, namely the blue, green, and red bands, was tested by regression using field observation data. The algorithms used to estimate bathymetry include Lyzenga, Stumpf, and Support Vector Machine (SVM). The test results of the three algorithms showed that the support vector machine algorithm was the best algorithm for estimating bathymetry after the Stumpf and Lyzenga algorithms. The correlation results of the SVM algorithm in the waters of the small Lambasina island got a correlation coefficient of determination R2 = 0.81 and the large Lambasina waters area R2 = 0.82. The second-best algorithm was Stumpf, with a correlation coefficient of determination of R2 = 0.79 in the waters of the small Lambasina island and R2 = 0.80 in the waters of the large Lambasina island. Lyzenga's algorithm got the correlation coefficient of determination R2 = 0.78 on small Lambasina Islands and large Lambasina Islands with a determination correlation coefficient value of R2 = 0.79.","PeriodicalId":53001,"journal":{"name":"Jurnal Kelautan Tropis","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46340619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Peramalan Curah Hujan Terhadap Produktivitas Garam Di Gersik Putih Sumenep","authors":"Tifani Noviasari, Nike Ika Nuzula, Makhfud Efendy, Angga Arifta Febrianto, A. Darmadi","doi":"10.14710/jkt.v26i1.16139","DOIUrl":"https://doi.org/10.14710/jkt.v26i1.16139","url":null,"abstract":"Salt production in Madura Island is running by evaporation method (solar evaporator). Thus, the process of salt production is highly dependent on weather factors. Weather conditions is one of the determinants of the success of salt production targets. In this study aims to determine the forecasting process of rainfall in support of salt production process at PT Garam Gersik Putih Sumenep. The method used to analyze rainfall data on PT Garam Gersik Putih in 2022 is the box-Jenkins Autoregressive Integrated Moving Average (ARIMA) model. Box-Jenkins Autoregressive Integrated Moving Average (ARIMA) is one of the time series forecasting methods using values in the past as dependent variables and independent variables. From the forecast results, it is known that Gersik Putih Pheasant has 9 dry dasarian with an estimated production of 27,360 tons. Saltworks Gersik Putih has 456 plots of crystallization land with a total land area of 126.36 Ha. The results of weather forecasting analysis can determine the time of pre-production , salt production and post-production of salt. Pre-production of salt is an activity of preparation and maintenance of infrastructure to maximize the upcoming dry season. Pre-production of salt is carried out from January to May. Salt production activities are processing sea water into salt crystals that take place from June to early november. At the peak of drought in 1 plot of land crystallization can produce 3-6 tons in one harvest. Post salt production is the activity of transporting salt from pheasant land to olo warehouse which is carried out from November to December due to the increase in rainfall intensity. The box-Jenkins integrated Moving Average (ARIMA) Autoregressive Model applied has a pearson coefficient correlation level of 0,94%. The correlation value of the pearson coefficient shows that forecasting is very good, adequate and feasible to use.  Produksi garam di Pulau Madura dilakukan dengan menggunakan metode penguapan (solar evaporator). Proses produksi garam bergantung pada curah hujan. Curah hujan menjadi penentu keberhasilan produksi garam. Pada penelitian ini bertujuan untuk mengetahui proses peramalan curah hujan dalam mendukung proses produksi garam pada PT Garam Gersik Putih Sumenep. Metode peramalan data curah hujan pada PT Garam Gersik Putih tahun 2022 adalah model Autoregressive Integrated Moving Average (ARIMA) Boox-Jenkins. ARIMA Boox-Jenkins adalah salah satu metode peramalan menggunakan nilai variabel independen dan variabel dependen. Dari hasil prakiraan diketahui bahwa pegaraman Gersik Putih memiliki ±9 dasarian kering dengan estimasi hasil produksi sebesar 27.360 ton. Pegaraman Gersik Putih memiliki 456 petak lahan kristalisasi dengan jumlah luas lahan 126,36 Ha. Hasil analisis peramalan cuaca juga dapat menentukan kapan berlangsungnya pra produksi garam, produksi garam serta pasca produksi garam. Pra produksi garam merupakan kegiatan persiapan dan pemeliharaan sarana prasarana untuk memaksimalk","PeriodicalId":53001,"journal":{"name":"Jurnal Kelautan Tropis","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41851780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Komposisi dan Distribusi Sampah Laut di Pantai Pasir Putih Losari, Brebes, Jawa Tengah","authors":"Rijal Amri, Cikal Kholifiyanti, Eti Sophia Wijayanti, Syamsul Bayan, R. Hidayat, N. Hidayati","doi":"10.14710/jkt.v26i1.15770","DOIUrl":"https://doi.org/10.14710/jkt.v26i1.15770","url":null,"abstract":" The coastal area is an important sector in the tourism industry, which plays as an affected area but also a contributor to marine debris. Therefore, environmental health risks due to Marine debris have become a major concern at the international, regional, and national levels. This study aims to examine the composition and spatial distribution of marine debris in the Pasir Putih beach area of Losari, Brebes. The results of this study can be used as baseline data for marine debris, as well as an evaluation of the implementation of the national action plan for handling marine debris. The method used is a field survey at 10 stations from August-October 2021. Composition and distribution analysis of marine debris is carried out based on the type, mass, and size. The marine debris found was 898 items (4,009 grams by weight). Based on its size, the marine debris was dominated by macro debris (99%). Based on the composition, 9 categories of marine debris were found: plastic, plastic foam, glass and ceramics, cloth, metal, paper and cardboard, rubber, wood, and other materials. The composition of marine waste is dominated by plastic debris (35%) and glass and ceramics (20%). Marine debris is evenly distributed in all research stations. The high level of marine debris on the beach is thought to be due to anthropogenic activities and water connectivity with residential areas around the coast. Environmental awareness education, as well as the enforcement of regulations by policymakers, are strategic actions that can be taken to overcome these problems.   Wilayah pantai merupakan sektor penting dalam industri pariwisata, yang menjadi daerah terdampak tapi juga sekaligus penyumbang sampah laut. Karenanya, resiko kesehatan lingkungan akibat sampah laut telah menjadi major concern pada level internasional, regional, maupun nasional. Penelitian ini bertujuan untuk mengkaji komposisi dan distribusi spasial sampah laut di kawasan Pantai Pasir Putih Losari, Brebes. Selain itu, hasil penelitian ini dapat menjadi baseline data sampah laut, sebagai evaluasi atas implementasi rencana aksi nasional penanganan sampah laut.  Metode yang digunakan adalah survei lapang pada 10 stasiun selama Agustus-Oktober 2021. Analisis komposisi dan distribusi sampah laut dilakukan berdasarkan jenis, massa, dan ukuran dari sampah laut. Sampah laut yang ditemukan sebanyak 898 item dengan berat 4.009 gram.  Berdasarkan ukurannya, sampah yang ditemukan didominasi oleh sampah makro (99%) dan sampah meso (1%). Adapun berdasarkan komposisi jenisnya, ditemukan 9 kategori sampah laut yang terdiri dari plastik, busa plastik, kaca dan keramik, kain, logam, kertas dan kardus, karet, kayu, dan bahan lainnya. Komposisi sampah laut didominasi oleh sampah plastik (35%) dan kaca dan keramik (20%). sampah laut terdistribusi merata di seluruh stasiun penelitian. Tingginya sampah laut di pantai ini diduga karena aktivitas antropogenik serta konektivitas perairan dengan wilayah pemukiman di sekitar pantai.","PeriodicalId":53001,"journal":{"name":"Jurnal Kelautan Tropis","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67007105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Logam Berat Mercury (Hg) dan Arsen (As) pada Hasil Tangkapan Nelayan Pesisir Semarang dan Tegal Jawa Tengah","authors":"C. A. Suryono, Agus Indardjo","doi":"10.14710/jkt.v25i3.16279","DOIUrl":"https://doi.org/10.14710/jkt.v25i3.16279","url":null,"abstract":"The Semarang and Tegal coastal waters are traditional fishing ground areas. However, the increasing use of coastal areas for various activities will increase pollutants in the coastal waters.  Heavy metals are pollutants that always appear in waters and accumulate in marine organisms. These study aims to determine As and Hg metals contained in the tissues of several marine organisms caught on the coast of Semarang and Tegal, Central Java. The analysis of As and Hg concentrations in organismal tissues using ICPMS.  The results showed that As and Hg were found in biota such as white shrimp (P. merguensis), blue crab (P. pelagicus), shellfish (A. inaequivalvis) and gastropods (H. ternatanus). Arsenic concentrations in the four biotas caught in Tegal (1.6 – 5.3 ppm) and Semarang (2.58 – 4.9 ppm). Meanwhile, Hg metal (0.02 – 0.15 ppm) in Tegal and (0.034 – 0.15 ppm) in Semarang.  The concentration level of As based on the biota caught in the Tegal waters are sequentially Shellfish > White shrimp > Gastropods > Blue swimming crab.  Meanwhile, the concentration of Arsenic in the biotas in Semarang waters are sequentially shellfish > white shrimp > blue crab > gastropods. However, Hg metal in the biota obtained in these two areas is very low  Pesisir Semarang dan Tegal merupakan daerah penangkapan perikanan tradisional.  Namun dengan semakin meningkatnya pemamnfaatan wilayah pesisir untuk berbagai kegiatan akan meningkatkan polutan dalam perairan.  Logam berat merupakan polutan yang selalu muncul dalam perairan dan terakumulasi organisme laut.  Penelitian ini bertujuan untuk mengetahui logam As dan Hg yang terdapat dalam jaringan beberapa biota yang ditangkap pesisir Semarang dan Tegal Jawa Tengah.  Analisa konsentrasi As dan Hg dalam jaringan organisme menguunakan ICPMS.  Hasil penelitian menunjukan logam As dan Hg ditemukan dalam biota seperti udang putih (P. Merguensis), rajungan (P. pelagicus), kerang bulu (A. inaequivalvis) dan gastropoda (H. ternatanus).  Konsentrasi Arsen di keempat biota yang ditangkap di Tegal (1,6 – 5,3 ppm) dan Semarang (2,58 – 4,9 ppm).  Sedangkan logam Hg (0,02 – 0,15 ppm) di Tegal dan (0,034 – 0,15 ppm) Semarang.  Tingkat konsentrasi logam As berdasarkan biota yang tertangkap di perairan Tegal secara berurutan Kerang bulu > Udang putih > Gastropoda > Rajungan.  Sedangkan konsentrasi Arsen dalam biota di perairan Semarang secara berurutan Kerang bulu > Udang putih > Rajungan > Gastropoda.  Namun logam Hg dalam biota yang didapat di kedua daerah tersebut sangat rendah. ","PeriodicalId":53001,"journal":{"name":"Jurnal Kelautan Tropis","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43060586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pengetahuan Masyarakat Lokal Terkait Keberadaan Kepiting Tapal Kuda dan Distribusinya di Sepanjang Pesisir Pulau Bintan","authors":"Rika Anggraini, Ita Karlina","doi":"10.14710/jkt.v26i1.15693","DOIUrl":"https://doi.org/10.14710/jkt.v26i1.15693","url":null,"abstract":"There are many reports of a decline in the population of horseshoe crabs in Asia, but knowledge about the distribution of horseshoe crabs on the coast of Bintan Island is still limited. We conducted interviews in 15 locations on the coast of Bintan Island. The information we collect is about the distribution of potential spawning areas and the utilization of horseshoe crabs in each area. Respondents were randomly selected as the surveyor walked through each study site. Verification of the distribution and breeding grounds of horseshoe crabs by respondents was done by asking respondents to indicate the location where they had seen pairs of horseshoe crabs mating, juveniles, and horseshoe crab eggs met; we also validated with direct observations made in the field. Respondents reported that in 15 locations, they had seen juveniles and horseshoe crabs in pairs. One respondent directly observed horseshoe crab eggs on the beach, and only a few found horseshoe crabs laying eggs. Respondents who saw paired horseshoe crabs generally worked as fishermen. We found three juvenile locations for horseshoe crabs, namely at Tembeling, Pengujan and Pengudang locations. At three locations Tachypleus gigas and Carcinoscorpius rotundicauda were found. Horseshoe crabs on Bintan Island are used as fertilizer, medicine and wall decoration. In this study, local wisdom provides essential information regarding the potential distribution of spawning grounds and the utilization of horseshoe crabs on the coast of Bintan Island  Banyaknya laporan mengenai penurunan populasi kepiting tapal kuda di Asia, tetapi pengetahuan tentang distribusi kepiting tapal kuda di Pesisir Pulau Bintan terbatas. kami melakukan wawancara di 15 lokasi di pesisir Pulau Bintan. Informasi yang kami kumpulkan tentang distribusi potensi daerah pemijahan, dan pemanfaatan kepiting tapal kuda pada masing-masing daerah. Responden dipilih secara acak pada saat pihak survei berjalan menyelusuri setiap lokasi penelitian. Verifikaksi distribusi dan tempat pembibitan kepiting tapal kuda oleh responden dilakukan dengan meminta responden untuk menunjukkan lokasi yang pernah melihat sepasang kepiting tapal kuda kawin, juvenil, serta telur kepiting tapal kuda di temui, kami juga melakukan validasi dengan pengamatan langsung yang di lakukan di lapangan. Responden telah melaporkan bahwa pada 15 lokasi pernah melihat juvenil dan kepiting tapal kuda berpasangan. Ada satu responden yang secara langsung mengamati telur kepiting tapal kuda di pantai dan hanya sebagian yang menemukan kepiting tapal kuda bertelur. Responden yang melihat kepiting tapal kuda berpasangan pada umumnya yang berkerja sebagai nelayan. Kami menemukan 3 lokasi juvenil kepiting tapal kuda yaitu pada lokasi Tembeling, Pengujan dan Pengudang. Pada ketiga lokas tersebut ditemukan jenis Tachypleus gigas dan Carcinoscorpius rotundicauda. Kepiting tapal kuda di Pulau Bintan di manfaatkan sebagai pupuk, obat dan hiasan dinding. Dalam penelitian ini pengetah","PeriodicalId":53001,"journal":{"name":"Jurnal Kelautan Tropis","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44823032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}