Jurnal Kelautan: Indonesian Journal of Marine Science and Technology最新文献

{"title":"KAJIAN STOK RAJUNGAN (Portunus pelagicus) DI PENDARATAN IKAN DESA BANCARAN BANGKALAN","authors":"N. Kamelia, Firman Farid Muhsoni","doi":"10.21107/JK.V13I3.7523","DOIUrl":"https://doi.org/10.21107/JK.V13I3.7523","url":null,"abstract":"ABSTRACT Blue Swimming Crab (Portunus pelagicus) is an important commodity because it has high economic value and market demand both at home and abroad is still high. The higher demand for crabs for export makes the existence of crabs decrease. The purpose of this study is to assess the status of crab stocks (Portunus pelagicus) in the landing fish of Bancaran village, Bangkalan which includes growth rates, mortality, exploitation rates and recruitment patterns. This research was conducted in December 2019-February 2020. The small crab samples were caught by local fishermen using gill nets with a mesh size of 3.0-3.5 inches with a total sample of 624 in which 339 male crab and 285 females. The range of carapace widths is 5.24-13.83 cm which consists of 3 groups of sizes where as a whole the small crab in Bancaran Village, Bangkalan has an average carapace width ranging from 10.46 cm with a weight of 76.5 g. In general the growth patterns of male, female, and combined crabs are allometric negative (α, 0.05) with a growth equation Lt = 19.5 [1-e -0.11 (t - (- 0.5652))] . The natural mortality rate (M) of the crab is 0.49 per year and the catch mortality rate (F) is 0.40 per year, so that the crab exploitation rate (E) is known to be 45% (under fishing). The cradle recruitment pattern in the research location was the highest in June (17.77%). Keywords : Blue Swimming crab (Portunus pelagicus), Stock, Growth Rate, Mortality, Exploitation, Recruitment ABSTRAK Rajungan (Portunus pelagicus) merupakan komoditas yang penting karena mempunyai nilai ekonomi tinggi dan permintaan pasar baik di dalam maupun luar negeri masih tinggi. Semakin tingginya permintaan akan rajungan untuk diekspor membuat eksistensi dari rajungan menjadi semakin menurun. Tujuan penelitian ini adalah mengkaji status stok rajungan (Portunus pelagicus) di pendaratan ikan desa Bancaran, Bangkalan yang meliputi laju pertumbuhan, mortalitas, tingkat eskploitasi dan pola rekrutmen. Penelitian ini dilakukan pada bulan Desember 2019-Februari 2020. Sampel rajungan yang ditangkap nelayan setempat menggunakan jaring insang dasar dengan mesh size 3,0-3,5 inci dengan total sampel berjumlah 624 ekor dimana 339 ekor rajungan jantan dan 285 ekor betina. Kisaran lebar karapas 5,24-13,83 cm yang terdiri atas 3 kelompok ukuran dimana secara keseluruhan rajungan di Desa Bancaran, Bangkalan memiliki rata-rata lebar karapas berkisar antara 10,46 cm dengan bobot 76,5 g. Secara umum pola pertumbuhan rajungan jantan, betina, dan gabungan adalah allometrik negatif (α, 0.05) dengan persamaan pertumbuhan Lt = 19,5 [1-e -0,11(t- (- 0,5652 ) ) ]. Laju mortalitas alami (M) rajungan sebesar 0,49 per thaun dan laju mortalitas penangkapan (F) 0,40 per tahun, sehingga diketahui laju eksploitasi rajungan (E) sebesar 45% (under fishing). Pola rekrutmen rajungan di lokasi penelitian tertinggi pada bulan Juni (17,77%). Kata kunci : Rajungan (Portunus pelagicus), Stok, Laju Pertumbuhan, Mortalitas, Eksploitasi, Rekrutmen","PeriodicalId":17689,"journal":{"name":"Jurnal Kelautan: Indonesian Journal of Marine Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81381421","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":"STUDY OF NUTRITIONAL CONTENTS OF SEA URCHIN GONAD FROM DRINI BEACH, GUNUNG KIDUL, YOGYAKARTA","authors":"D. Pringgenies, Richardus Mahatmada Indrajati, Ali Djunaedi","doi":"10.21107/JK.V13I3.7808","DOIUrl":"https://doi.org/10.21107/JK.V13I3.7808","url":null,"abstract":"ABSTRACTThis paper aims to determine the types and contents of protein, fatty acids, amino acids and protein in the gonads of Arbacia lixula, Colobocentrotus atratus, Heterocentrotus trigonarius and Echinotrix diadema from the waters of Drini, Gunung Kidul, Yogyakarta. Kjedal method was used to analyze the protein content, while GC and HPLC methods were employed to analyze amino acids in this study. The results showed that the protein contents of each sample, consequently from highest to lowest, were Heterocentrotus trigonarius (13.3 %), Echinotrix diadema (10.86), Colobocentrotus atratus (10.41) and Arbacia lixula (9.90%). Amino acids analysis from all identified both saturated fatty acids, consisting of lauric acid, myristic acid, palmitic acid, stearic acid, arachidonic acid, lignoceric acid, as well as non-saturated fatty acids, consisting of palmitoleic acid, oleic acid, linoleic acid, erucic acid, EPA, and DHA. The highest contents of non-saturated fatty acids were identified in Colobocentrotus atratus (434.14 mg/100g) and the lowest content in Arbacia lixula (197.71 mg/100g). The highest percentage of essential fatty acids was found in Heterocentrotus trigonarius (0.29%), whereas the lowest was found in Echinotrix diadema (0.19 %). It is concluded that the gonad of Heterocentrotus trigonarius showed the highest protein and essential fatty acids contents. This study also found that Colobocentrotus atratus sea urchin gonads possess the highest content of non-saturated fatty acids (434.14 mg/100g).  Keywords: amino acid, fatty acid, protein, sea urchin gonad.","PeriodicalId":17689,"journal":{"name":"Jurnal Kelautan: Indonesian Journal of Marine Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80328011","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":"ASOSIASI LAMUN DAN ECHINODERMATA PADA EKOSISTEM PADANG LAMUN CAGAR ALAM LEUWEUNG SANCANG, JAWA BARAT","authors":"T. D. K. Pribadi, Raden Wandha Humaira, Nenci Haryadi, Archie S. Eka Buana, Yudi Nurul Ihsan","doi":"10.21107/JK.V13I3.7479","DOIUrl":"https://doi.org/10.21107/JK.V13I3.7479","url":null,"abstract":"ABSTRACT The Leuweung Sancang Nature Reserve has ecosystem diversity, including seagrass beds, with a variaety of natural resources that are important to be preserved. Apart from being a food source for herbivorous organisms, seagrass beds also function as shelter and breed for many marine invertebrates, including Echinoderms. Association between Echinoderms and seagrass was observed in this study to investigate the interaction. Sampling was carried out in 1x1 m 2 plots which were placed in 3  transect  lines  of 250 m long, with a plot intervals of 25 m on each transect line.  The transect line extended from the beach heading to the shore, and was carried out in 4 different stations, namely Ciporeang, Cipunaga, Cikolomberan, and Cipangikisan . Observation had been done to determine diversity, density, coverage, and evenness of both seagrass and Echinoderms, thus to study the correlation between them. The results showed that there were 2 seagrass species, Thalassia hempricii and Cymodocea rotundata, and there were 2 families of Echinoderms: Ophiocomidae and Holothuridae. Result of Rank–Spearman correlation coefficient showed possitive association between seagrass and echinoderms in all stations being observed, but only in Cikolomberan that showed significantly high association. Keywords:  association, Echinoderms, Leuweung Sancang, seagrass. ABSTRAK Cagar alam Leuweung Sancang memiliki keanekaragaman ekosistem, termasuk padang lamun, dengan berbagai sumber daya alam di dalamnya yang penting untuk dijaga kelestariannya. Selain sebagai sumber makanan bagi organisme herbivor, padang lamun juga berfungsi sebagai tempat berlindung dan berkembang biak bagi banyak invertebrat a laut, termasuk Echinodermata. Keterkaitan antara E chinodermata dan lamun diobservasi pada studi ini untuk dipelajari untuk melihat interaksinya. Pengambilan sampel dilakukan dalam plot 1 x 1 m 2 yang ditempatkan pada 3 garis transek masing-masing sepanjang 250 m dengan interval plot sejauh 25 m pada setiap garis transek. Garis transek ter bentang dari pantai menuju laut, dan dilakukan pada 4 stasiun yang berbeda, yaitu Ciporeang, Cipunaga, Cikolomberan, Cipangikisan. Pengamatan dilakukan untuk menentukan keragaman, kepadatan, frekuensi, tutupan dan kemerataan lamun dan Echinodermata, untuk kemudian dilihat asosiasinya. Hasil menunjukkan bahwa di keempat stasiun pengamatan ditemukan 2 spesies lamun yaitu Thalassia hempricii dan Cymodocea rotundata dan 2 famili Echinodermata : Ophiocomidae dan Holothuridae. Hasil koefisien korelasi Rank-Spearman pada keempat stasiun pengamatan menunjukan adanya asosiasi positif antara lamun dan Echinodermata, namun hanya di Cikolomberan yang memiliki asosiasi tinggi dan signifikan . Kata kunci : asosiasi, Echinodermata, Leuweung Sancang, lamun.","PeriodicalId":17689,"journal":{"name":"Jurnal Kelautan: Indonesian Journal of Marine Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88997755","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":"PERUBAHAN SEBARAN LIMBAH AIR PANAS PT. PJB UP MUARA KARANG AKIBAT MASTERPLAN REKLAMASI","authors":"Alfath Islami, Rudhy Akhwady, M. Mauludiyah","doi":"10.21107/JK.V13I3.7823","DOIUrl":"https://doi.org/10.21107/JK.V13I3.7823","url":null,"abstract":"ABSTRACT T he reclamation master plan in muara karang waters has the potential to influence the hydrodynamic conditions and the temperature distribution of the waters affected by the inclusion of hot water waste from the PT.PJB UP muara karang power plant activities. T he purpose of this study is to determine changes in current patterns and the heat distribution of waste water from PT. PJB UP muara karang due to the reclamation master plan in muara karang waters, north Jakarta. this research uses hydrodynamic modeling. T he hydrodynamic modelling is based on continuity and momentum equations. T he model produced in this study is quite in accordance with field conditions with a relative error value less than 15%. the conditions of reclamation masterplan result the change of current patterns, especially around the intake canal where the current velocity decreased due to obstruction of water mass flow by islands g and h and the canal boundary on both. the changes of the current pattern inflicted the changes of distribution pattern of heat water waste in muara karang. I ncreased water temperatures due to the reclamation masterplan occur in the western and eastern areas with a difference in water temperature of 0.35 o c - 1 o c compared to post reclamation conditions. this is inversely proportional to the temperature in the area around the intake canal which is decreased with a temperature difference of -1 o c to -3 o c. keyword : R eclamation, T hermal dispersion, M odeling ABSTRAK Rencana induk reklamasi di perairan Muara Karang berpotensi mempengaruhi kondisi hidrodinamika dan distribusi temperatur perairan yang dipengaruhi oleh masuknya limbah air panas dari kegiatan PLTU PT.PJB UP Muara Karang. Tujuan dari penelitian ini adalah untuk mengetahui perubahan pola arus dan distribusi kalor air limbah dari PT. PJB UP Muara Karang karena adanya rencana induk reklamasi di Perairan Muara Karang, Jakarta Utara. Penelitian ini menggunakan pemodelan hidrodinamik. Pemodelan hidrodinamika didasarkan pada persamaan kontinuitas dan momentum. Model yang dihasilkan pada penelitian ini cukup sesuai dengan kondisi lapangan dengan nilai error relatif kurang dari 15%. Kondisi masterplan reklamasi mengakibatkan terjadinya perubahan pola arus terutama disekitar intake canal dimana kecepatan arus menurun akibat terhambatnya aliran massa air oleh pulau G dan H serta batas saluran pada keduanya. Perubahan pola arus tersebut menyebabkan terjadinya perubahan pola sebaran limbah air panas di Muara Karang. Peningkatan suhu air akibat masterplan reklamasi terjadi di wilayah barat dan timur dengan perbedaan suhu air 0,35oC - 1oC dibandingkan kondisi pasca reklamasi. Hal ini berbanding terbalik dengan temperatur di sekitar saluran intake yang mengalami penurunan dengan perbedaan temperatur -1oC sampai -3oC. Kata Kunci: Reklamasi; Sebaran Panas; Pemodelan","PeriodicalId":17689,"journal":{"name":"Jurnal Kelautan: Indonesian Journal of Marine Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89924906","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":"ANALISIS ZONA POTENSI PENANGKAPAN IKAN (ZPPI) BERDASARKAN CITRA SATELIT SUOMI NPP-VIIRS (STUDI KASUS: LAUT ARAFURA)","authors":"A. Purwanto, Dhia Ramadhani","doi":"10.21107/JK.V13I3.8126","DOIUrl":"https://doi.org/10.21107/JK.V13I3.8126","url":null,"abstract":"ABSTRACT Information on potential fishing zone ( PFZ ) is needed by fishermen to facilitate fishing operations and increase fish catch. The purpose of this study was to determine the distribution of sea surface temperature and to create maps of potential fishing zones in Arafura Sea (eastern Indonesia). Information on potential fishing zones was obtained base on thermal front events from sea surface temperature (SST). Satellite imagery data used was Suomi NPP-VIIRS image level 3 which recording period of one month SST, from August 1-31, 2018. SST was measured by using the statistical regression method with Non-Linear Multi Channel SST (NLSST) approach. The results showed that the average value of SST distribution in the Arafura Sea was relatively high with range of values of 26.68 - 31.79 °C, and produce around 70 points of potential fishing zones information. Only 12 days out of 31 days can produce the information needed for mapping the ZPPI. The ZPPI data is then divided into three groups based on the density of fish points, they are Zone 1, Zone 2, and Zone 3. Satellite imagery is very helpful in mapping ZPPI information in a water area. Keywords: SNPP-VIIRS, Thermal Front, Potential Fishing Zones, Arafura Sea ABSTRAK Informasi mengenai zona potensi penangkapan ikan (ZPPI) sangat di butuhkan nelayan untuk memudahkan dalam operasi penangkapan ikan dan meningkatkan hasil tangkapan ikan. Tujuan penelitian ini adalah untuk mengetahui distribusi suhu permukaan laut dan membuat peta informasi zona potensi penangkapan ikan di Laut Arafura yang terletak di bagian timur Indonesia. Informasi zona potensi penangkapan ikan diperoleh berdasarkan kejadian termal front dari suhu permukaan laut. Data citra satelit yang digunakan adalah citra Suomi NPP-VIIRS level 3 untuk periode perekaman selama 1 (satu) bulan yaitu dari tanggal 1 Agustus 2018 sampai dengan 31 Agustus 2018 yang sudah berupa informasi suhu permukaan laut. Perhitungan suhu permukaan laut tersebut berdasarkan metode regresi statistik dengan pendekatan Non-Linear Multi Channel SST (NLSST). Hasil penelitian menunjukkan rata-rata nilai distribusi suhu permukaan laut di Laut Arafura relatif tinggi dengan kisaran nilai 26.68 0C - 31.79 0C dan informasi zona potensi penangkapan ikan yang dihasilkan sekitar 70 titik. Dari data selama 1 bulan (31 hari) hanya sekitar 12 tanggal yang mampu menghasilkan informasi ZPPI. Data ZPPI tersebut kemudian dibagi menjadi 3 (tiga) kelompok yaitu Zona 1, Zona 2 dan Zona 3 berdasarkan tingkat kerapatan titik ikannya. Penggunaan citra satelit sangat membantu dalam pemetaan informasi ZPPI di suatu wilayah perairan. Kata K unci: SNPP-VIIRS, Termal Front, Zona Potensi Penangkapan Ikan , Laut Arafura","PeriodicalId":17689,"journal":{"name":"Jurnal Kelautan: Indonesian Journal of Marine Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79536383","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":"PERBANDINGAN HASIL METODE IDENTIFIKASI SPESIES : MORFOLOGI DAN MOLEKULER PADA IKAN JULUNG-JULUNG DI TPI (TEMPAT PELELANGAN IKAN) MUARA ANGKE, DKI JAKARTA","authors":"A. Putri, Hawis H. Madduppa","doi":"10.21107/JK.V13I3.7303","DOIUrl":"https://doi.org/10.21107/JK.V13I3.7303","url":null,"abstract":"ABSTRACT The Congaturi halfbeak (Hyporhampus limbatus), also known as the Valenciennes halfbeak, is an important economic fish in the fisheries sector of Indonesia, with a high level of diversity . The high diversity creates difficulties in the identification process for each species. The identification of species can be based on morphological and molecular methods. Therefore, this study aimed to compare the results of the morphological and molecular identification methods using a sample of H. limbatus. Morphological identification was carried out using morphometric techniques and for molecular identification following DNA Barcoding protocol. The results showed both morphological and molecular methods indicate that the sample was identified as Hyporhampus limbatus. The morphology of the Hyporhampus limbatus has an elongated body shape with a silvery color filled with scales all over his body except on the head. The lower jaw is taper in shape longer than the upper jaw and has an immarginate tail. While for the DNA Barcoding results show high similiraty (97%) and percentage of query coverage (98%) to identify Hyporhampus limbatus. Keyword : morphological, molecular, garfish ABSTRAK Ikan julung-julung (Hyporhampus limbatus) merupakan ikan ekonomis penting di sektor perikanan Indonesia yang memiliki tingkat keragaman yang tinggi. Tingginya keragaman menyebabkan kesulitan dalam proses identifikasi dari setiap spesies. M etode yang dapat digunakan untuk identifikasi spesies adalah metode morfologi dan molekuler. Penelitian ini bertujuan untuk membandingkan hasil dari metode identifikasi morfologi dan molekuler dengan menggunakan sampel ikan julung-julung. Identifikasi morfologi dilakukan menggunakan teknik morfometrik sedangkan untuk molekuler diaplikasikan dengan DNA Barcoding. Hasil identifikasi dengan metode morfologi dan molekuler menunjukkan hasil yang sama yaitu Hyporhampus limbatus. Berdasarkan hasil identifikasi morfologi Hyporhampus limbatus memiliki bentuk tubuh yang memanjang dengan warna perak dengan sisik di seluruh tubuhnya kecuali pada bagian kepala. Rahang bawahnya berbentuk lancip dengan ukuran lebih panjang dibandingkan dengan rahang atas serta memiliki ekor imarginate. H asil molekuler (DNA Barcoding) menunjukkan bahwa Hyporhampus limbatus  memiliki nilai yang tinggi untuk tingkat kemiripan (97%) dan Query Cover (98%). Kata kunci : morfologi, molekuler, ikan julung-julung","PeriodicalId":17689,"journal":{"name":"Jurnal Kelautan: Indonesian Journal of Marine Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81008970","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":"PENGARUH PENGGUNAAN AMPAS TAHU TERFERMENTASI MENGGUNAKAN MIKROORGANISME MIX TERHADAP KINERJA PERTUMBUHAN JUVENIL UDANG VANAME (Litopenaeus vannamei)","authors":"S. Surianti, A. Aslamyah, W. Wahyudi","doi":"10.21107/JK.V13I3.7630","DOIUrl":"https://doi.org/10.21107/JK.V13I3.7630","url":null,"abstract":"ABSTRACTThis study aims to determine the effect of the use of fermented tofu dregs using mix microorganisms on the growth of vaname shrimp (Litopenaeus vannamei). Test animals used in this study were 22-day-old vaname shrimp (PL 22) with an initial weight of ± 0.09 g. This study uses a completely randomized design (CRD) consisting of 4 treatments and 3 replications to obtain 12 experimental units, namely PA (5% fermented tofu waste) PB (10% fermented tofu waste) PC (15% fermented tofu waste) PD (20% fermented tofu pulp). The results showed that the treatment of various doses of fermented tofu dregs using Microorganism Mix significantly affected the growth rate and survival but did not affect the level of consumption of vaname shrimp feed. 15% fermented tofu pulp dosage is the best treatment for absolute growth, survival and consumption level of vaname shrimp feed Keywords: Tofu waste, mixed microorganisms, vaname shrimp, absolute growth, survival ABSTRAKPenelitian ini bertujuan untuk mengetahui pengaruh penggunaan ampas tahu terfermentasi menggunakan mikroorganisme mix terhadap pertumbuhan udang vaname (Litopenaeus vannamei). Hewan uji yang digunakan dalam penelitian ini adalah udang vaname umur 22 hari (PL 22) dengan bobot awal ± 0,09 g. Penelitian ini menggunakan rancangan acak lengkap (RAL) yang terdiri dari 4 perlakuan dan 3 kali ulangan sehingga diperoleh 12 unit percobaan, yakni PA (5 % ampas tahu terfermentasi) PB (10 % ampas tahu terfermentasi) PC (15 % ampas tahu terfermentasi) PD (20 % ampas tahu terfermentasi). Hasil penelitian menunjukkan perlakuan berbagai dosis ampas tahu terfermentasi menggunakan Mikroorganisme Mix berpengaruh nyata terhadap laju pertumbuhan dan sintasan tetapi tidak berpengaruh terhadap tingkat konsumsi pakan udang vaname. Dosis ampas tahu terfermentasi sebanyak 15% merupakan perlakuan terbaik untuk pertumbuhan mutlak, kelangsungan hidup dan tingkat konsumsi pakan udang vanameKata kunci : Ampas tahu, mikroorganisme mix, udang vaname, pertumbuhan mutlak, kelangsungan hidup","PeriodicalId":17689,"journal":{"name":"Jurnal Kelautan: Indonesian Journal of Marine Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88005894","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":"JASA PENYEDIA EKOSISTEM TERUMBU KARANG DI KAWASAN SUAKA ALAM PERAIRAN KEPULAUAN RAJA AMPAT DARI PERSPEKTIF VALUASI EKONOMI","authors":"Muhammad Nur Arkham, Yudi Wahyudin, Muhammad Reza Pahlevi, R. Y. Hutapea","doi":"10.21107/JK.V13I3.7921","DOIUrl":"https://doi.org/10.21107/JK.V13I3.7921","url":null,"abstract":"ABSTRACT The existence of coral reef ecosystems in the SAP area of Raja Ampat Regency and surrounding seas has to provisioning services is used from the local fisherman as a source of livelihood. The purpose of this study is to estimate the economic value of the services of providers of capture fisheries to coral reef ecosystems in the SAP area of Raja Ampat Islands with the effect on production (EOP) approach. Data needed in this study are primary and secondary data. Analysis of the data used is the description analysis and economic valuations carried out by assuming a consumer surplus (CS) of resources. The results of the study showed that based on fishermen's perceptions of 59% the existence of coral reef ecosystems in the SAP Area of Raja Ampat Regency and surrounding seas provide a service in the form of productivity of fish catches associated with coral reefs. Based on the Effect on Production (EOP) analysis approach, it is estimated that the economic value of the consumer surplus (CS) of the coral reef ecosystem is IDR. 442,647,305.00 / person / year with an area of 2178.7 hectares and the number of beneficiary fishermen of 238 people, the total economic value per resource is IDR. 48,354,550.00 / Ha / Person / Year. Keywords : economic valuation, provisioning services, capture fisheries, consumer surplus, coral reef ecosystem, Raja Ampat Regency ABSTRAK Keberadaan ekosistem terumbu karang di Kawasan SAP Kabupaten Raja Ampat dan laut sekitarnya memberikan sebuah jasa penyediaan perikanan yang dimanfaatkan oleh nelayan sekitar sebagai sumber penghidupan. Tujuan dari penelitian ini adalah mengestimasi nilai ekonomi jasa penyedia perikanan tangkap ekosistem terumbu karang di Kawasan SAP Kepulauan Raja Ampat dengan pendekatan effect on production (EOP). Data yang dibutuhkan dalam penelitian adalah data primer dan sekunder. Analisis data menggunakan analisis deskriptif dan valuasi ekonomi dilakukan dengan menduga surplus konsumen (CS) sumberdaya. Hasil dari penelitian menunjukkan bahwa berdasarkan persepsi nelayan sebesar 59% keberadaan ekosistem terumbu karang di Kawasan SAP Kabupaten Raja Ampat dan laut sekitarnya memberikan jasa penyediaan berupa produktivitas hasil tangkapan ikan yang berasosiasi dengan terumbu karang. Berdasarkan pendekatan analisis Effect on Production (EOP) didapatkan estimasi nilai ekonomi dari surplus konsumen (CS) terhadap ekosistem terumbu karang sebesar Rp. 442.647.305,00/Orang/Tahun dengan luas kawasan 2178,7 Ha dan jumlah nelayan pemanfaat sebanyak 238 orang didapatkan nilai ekonomi total per sumberdaya yaitu sebesar Rp. 48.354.550,00/Ha/Orang/Tahun. Kata kunci : valuasi ekonomi, jasa penyediaan, perikanan tangkap, surplus konsumen, ekosistem terumbu karang, Kabupaten Raja Ampat","PeriodicalId":17689,"journal":{"name":"Jurnal Kelautan: Indonesian Journal of Marine Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82950093","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":"ANALISA TEMPORAL SEBARAN SUHU PERMUKAAN LAUT TAHUN 2018 HINGGA 2020 DENGAN DATA CITRA TERRA MODIS","authors":"A. Azizah, Hendrata Wibisana","doi":"10.21107/JK.V13I3.7550","DOIUrl":"https://doi.org/10.21107/JK.V13I3.7550","url":null,"abstract":"ABSTRACTSea surface temperature (SPL) information is the most important water quality parameter in the ocean, especially in coastal areas. Remote sensing technology with Terra Modis satellite data is used for periodic monitoring of SPL changes. The purpose of this study was to analyze the temporal distribution of SPL on the coast of Malang, East Java. The data used are SPL data from Terra-MODIS satellite sensors in May 2018, 2019 and 2020. Analysis of the data used is descriptive analysis which includes temporal analysis of SPL based on SPL fluctuations in graphical form. The results showed that the temporal variation of the 2018-2020 SPL on the coast of Malang tends to increase. The SPL value in 2018 varies between 25 ° C - 26 ° C while in 2019 it varies between 26 ° C - 27 ° C and in 2020 it ranges between 30 ° C - 31 ° C. The highest average SPL value from 2018 - 2020 is in 2020 with a temperature of 30.58 ° C. In an effort to model sea surface temperatures used calculations using mathematical models. From the results obtained it can be concluded that the most optimal mathematical model is derived from the wavelength of 667 nm on May 23, 2020 with the equation model y = -0,498ln (x) + 27,936 which results in a correlation value of R = 0.6561.Keywords: sea surface temperature, terra modis, satellite, mathematical models.ABSTRAKInformasi suhu permukaan laut (SPL) merupakan parameter kualitas perairan yang paling penting di lautan terutama kawasan pesisir. Teknologi penginderaan jauh dengan data satelit Terra-MODIS digunakan untuk pemantauan perubahan SPL secara berkala. Tujuan penelitian ini adalah menganalisis sebaran temporal SPL di pesisir pantai Malang, Jawa Timur. Data yang digunakan adalah data SPL dari sensor satelit Terra Modis bulan Mei 2018, 2019 dan 2020. Analisis data yang digunakan adalah analisis deskriptif yang meliputi analisis SPL secara temporal berdasarkan fluktuasi SPL dalam bentuk grafik. Hasil penelitian menunjukan bahwa variasi temporal SPL tahun 2018-2020 di pesisir Malang cenderung mengalami peningkatan. Nilai SPL tahun 2018 bervariasi antara 25°C – 26°C sedangkan tahun 2019 bervariasi antara 26°C – 27°C dan tahun 2020 berkisar antara 30°C – 31°C. Nilai SPL rata-rata tertinggi dari tahun 2018 – 2020 berada pada tahun 2020 dengan suhu 30,58°C. Dalam upaya memodelkan suhu permukaan laut digunakan perhitungan dengan menggunakan model matematika. Dari hasil yang diperoleh dapat disimpulkan bahwa model matematis yang paling optimal berasal dari panjang gelombang 667 nm pada tanggal 23 Mei 2020 dengan model persamaan y = -0,498ln(x) + 27,936 yang menghasilkan nilai korelasi R = 0,6561.Kata Kunci: suhu permukaan laut, terra modis, satelit, model matematis.","PeriodicalId":17689,"journal":{"name":"Jurnal Kelautan: Indonesian Journal of Marine Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77461772","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":"Back Matter","authors":"E. Editor","doi":"10.21107/jk.v13i3.9271","DOIUrl":"https://doi.org/10.21107/jk.v13i3.9271","url":null,"abstract":"","PeriodicalId":17689,"journal":{"name":"Jurnal Kelautan: Indonesian Journal of Marine Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75026975","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}