Jurnal Kelautan Tropis
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Published By Institute Of Research And Community Services Diponegoro University (Lppm Undip)

2528-3111, 1410-8852

2021 ◽  
Vol 24 (3) ◽  
pp. 393-401
Author(s):  
Tengku Zia Ulqodry ◽  
Andreas Eko Aprianto ◽  
Andi Agussalim ◽  
Riris Aryawati ◽  
Afan Absori

Berbak Sembilang National Park of South Sumatra Region (BSNP South Sumatera) is the largest mangrove ecosystem in the western part of Indonesia. Monitoring of mangrove coverage in BSNP South Sumatera carried out using Landsat-8 imagery data based on NDVI values (Normalized Difference Vegetation Index) integrated with mangrove LAI (Leaf Area Index) data. The research purpose was to analyze the mangrove coverage and mapping the density of the mangrove vegetation canopy with the integration of remote sensing data and LAI. This research conducted field survey with LAI measurement of mangrove canopy coverage and integrated with remote sensing data to validate map. The determination and correlation coefficient of NDVI and LAI value of canopy coverage was high (R2 = 0.69 ; r = 83.07).The results of research indicated that the overall distribution of the mangrove area was 94,622.05 ha. The NDVI image integration map with LAI resulted in 4 mangrove canopy density classes consisted of rare canopy (688.80 ha ; 0.73%), moderately dense canopy (1,139.55 ha ; 1.2%), dense canopy (35,003.46 ha ; 37%), and very dense canopy (57,790.20 ha ; 61.07%). Taman Nasional Berbak Sembilang wilayah Sumatera Selatan (TNBS Sumsel) merupakan kawasan ekosistem mangrove terluas di wilayah Indonesia bagian barat. Pemantauan kerapatan kanopi vegetasi mangrove di TNBS Sumsel dilakukan menggunakan data Citra Landsat-8 berdasarkan nilai NDVI (Normalized Difference Vegetation Index) yang diintegrasikan dengan data LAI (Leaf Area Index) mangrove di lapangan. Penelitian ini bertujuan untuk menganalisis tutupan vegetasi mangrove dan memetakan sebaran kerapatan kanopi mangrove dengan integrasi data penginderaan jauh dan LAI. Penelitian ini menggunakan metode pengolahan data survei lapangan dan hasil pengolahan citra satelit. Nilai koefisien determinasi dan korelasi antara nilai NDVI dengan nilai LAI tutupan Kanopi di Lapangan dikategorikan tinggi (R2 = 0,69 ; r = 83,07). Hasil penelitian menunjukkan tutupan mangrove secara keseluruhan seluas 94.622,05 ha. Peta integrasi citra NDVI dengan LAI mangrove di lapangan menghasilkan 4 kelas kerapatan kanopi mangrove yakni kanopi jarang seluas 688,80 ha (0,73%), kanopi sedang seluas 1.139,55 ha (1,2%), kanopi lebat seluas 35.003,46 ha (37%), dan kanopi sangat lebat seluas 57.790,20 ha (61,07%).


2021 ◽  
Vol 24 (3) ◽  
Author(s):  
Dwi Haryanti ◽  
Diah Permata Wijayanti ◽  
Bambang Yulianto ◽  
Mada Triandala Sibero ◽  
Lutfillah Arief Ghinaa Shabrina

Eutrophication and sedimentation have become a major threat to coral reefs in nearby areas with anthropogenic activities. These threats are often accompanied by shifting ecosystems from coral-rich to fast-growing algae-dominated water, and high prevalence of coral disease. In Panjang Island, Jepara, we observed the outbreak of photosynthetic ascidians along with a high sedimentation at the eastern part of the island. The ascidians were seen overgrowing most substrates including corals, macroalgae, dead-coral-algae, and rubbles in April to May 2019. In July and August 2019, observation and data collection using quadrant transect were conducted to monitor the outbreak. The result showed that ascidians were still present in the area, despite becoming pale and smaller. This report shows that the outbreak of these photosynthetic ascidians was not persistent, however, the effect on coral reef health should not be overlooked.


2021 ◽  
Vol 24 (3) ◽  
pp. 385-392
Author(s):  
Jelita Rahma Hidayati ◽  
Ervia Yudiati ◽  
Delianis Pringgenies ◽  
Zaneb M. Ben Mansur ◽  
Fadhliyah Idris

Sargassum sp. classified as brown seaweed which is known as an alginophyte (alginate producer). Alginate has undergone a depolymerization process called alginate oligosaccharides (AOS) and has been shown to have antioxidant activities to increase wound tissue recovery. This study aimed to determine the antioxidant activity of Alginate oligosaccharides (AOS) and their ability to improve the cutaneous wound enclosure in Zebrafish (Danio rerio). The IC50 value was used to calculate the ability of extract to inhibit free radicals using DPPH (516 nm). Zebrafish were immersed 12 hours before the injury and shortly after injury with a two factorial design, i.e., alginate concentration and immersion time. Zebrafish were immersed for 1 hour, 3 hours, and 5 hours with serial concentration of 200 ppm, 400 ppm, and 600 ppm, respectively. Morphological observations were carried out at the the first day, fourth day, tenth day, and twenty-first-day post wounding. The results of this study showed that alginate from Sargassum sp. has a yield of 40.5 ± 1.125% with a purity level of 89.95%. Based on antioxidant activity, alginate is categorized as moderate (178,377 ppm) and evidently has the ability to increase wound recovery compared to control. It has indicated by the formation of the wound enclosure.


2021 ◽  
Vol 24 (3) ◽  
pp. 291-301
Author(s):  
Akhmad Tri Prasetyo ◽  
Muslim Muslim ◽  
Heny Suseno

The study of radioactive dispersion in the ocean should be conducted to prepare the construction of nuclear power plant (NPP) in Gosong Coast, West Kalimantan. This study estimated the distribution of 137Cs radioactive from various scenarios of radioactive waste dumping if nuclear emergency is occurred during NPP’s operation. These scenarios were distinguished based on their volume discharges of radioactive waste into the ocean, included 10 m3 (Scenario I), 50 m3 (Scenario II), and 100 m3 (Scenario III).  Model dispersions were constructed for 15 days by Delft3D-Flow module. The simulation showed that ocean current directions were not significantly different among spring and neap tide, instead the ocean current during the spring period dominantly increased rather than neap period. Ocean currents at Gosong Coast flowed parallel to the shoreline towards Singkawang Coastal Area during ebb tide. Meanwhile, during flood tide, ocean currents at Gosong Coast flowed offshore through Burung Archipelagic. The dispersed model showed the distribution of 137Cs radioactive for 15 days reaching to coastal areas of Burung Archipelagic, Singkawang, and Southern Sambas Coast. Each scenario of the disposal system did not influence the marine pollution of the West Kalimantan Sea.


2021 ◽  
Vol 24 (3) ◽  
pp. 311-322
Author(s):  
Mauludia Mauludia ◽  
Thamrin Usman ◽  
Winda Rahmalia ◽  
Dwi Imam Prayitno ◽  
Siti Nani Nurbaeti

Shrimp is one of the aquatic organisms that contain several active compounds, including astaxanthin. Cincalok is one of the fermented shrimp products containing astaxanthin. This study aims to determine the characteristics of astaxanthin extract from cincalok and its antioxidant activity. Extraction of astaxanthin from cincalok was carried out using the reflux method with acetone : cyclohexane (20:80 v/v) as a solvent. The identification and characterization of astaxanthin was carried out using thin-layer chromatography (TLC), UV-Vis spectrophotometry, and High-Pressure Liquid Chromatography (HPLC). Meanwhile, the antioxidant activity test was carried out using the 1,1-diphenyl-2-picrylhydrazyl (DPPH) method in one serial concentration (5; 15; 25 ppm). The results of TLC analysis showed that astaxanthin in cincalok extract has Rf value (0.32). The analysis using a UV-Vis spectrophotometer produced a spectrum with a maximum wavelength of 477 nm, which corresponds to the maximum wavelength of standard astaxanthin. The yield of astaxanthin extract from cincalok in this study was 1.47 mg/100 g wet weight. The chromatogram from the results of UHPLC analysis showed that the retention time of cincalok astaxanthin extract was 6.27 minutes with a purity of 18.03%. The antioxidant activity of cincalok astaxanthin extract was 568.32 ppm. Udang merupakan salah satu organisme air yang mengandung banyak senyawa aktif, termasuk astaxanthin. Cincalok merupakan salah satu produk hasil fermentasi udang yang mengandung astaxanthin. Penelitian ini bertujuan untuk mengetahui karakteristik ekstrak astaxanthin dari cincalok dan aktivitas antioksidannya. Ekstraksi astaxanthin dari cincalok menggunakan metode refluks dengan pelarut aseton:sikloheksan (20:80 v/v). Identifikasi dan karakterisasi astaxanthin dilakukan dengan menggunakan kromatografi lapis tipis (KLT), spektrofotometri UV-Vis, dan High Pressure Liquid Chromatography (HPLC). Sedangkan uji aktivitas antioksidan dilakukan menggunakan metode 1,1-difenil-2-pikrilhidrazil (DPPH) dengan memvariasikan konsentrasi larutan uji, yaitu 5; 15; 25 ppm. Hasil dari penelitian ini melaporkan astaxanthin pada ekstrak cincalok menunjukkan nilai Rf 0,32 pada kromatografi lapis tipis (KLT). Hasil analisis menggunakan spektrofotometer UV-Vis menghasilkan spektra dengan panjang gelombang maksimum 477 nm, yang sesuai dengan panjang gelombang maksimum astaxanthin standar. Randemen ekstrak astaxanthin dari cincalok pada penelitian ini adalah 1,47 mg/100 g berat basah. Kromatogram dari hasil analisis UHPLC menunjukkan waktu retensi ekstrak astaxanthin cincalok yaitu selama 6,27 menit dengan kemurnian sebesar 18,03%. Aktivitas antioksidan dari ekstrak astaxanthin cincalok diperoleh sebesar 568,32 ppm.  


2021 ◽  
Vol 24 (3) ◽  
pp. 302-310
Author(s):  
Dwi Fajriyati Inaku ◽  
Nurjannah Nurdin ◽  
Dewi Yanuarita Satari

Detection of shoreline changes needs to be done to determine changes so that supervision and management planning in a coastal area can be carried out, one of which is on the coast of Takalar Regency, South Sulawesi. This study aims to map changes in the coastline in Takalar Regency in different seasons and to see the effect of the waves on these changes. This study uses Landsat satellite imagery data from 1998-2018, and wave data obtained from Copernicus Marine Environment Monitoring Services (CMEMS). The shoreline data extraction was using the combination of single band and band ratio approach while the shoreline change rate calculation was using the Digital Shoreline Analysis System (DSAS) application. In addition, GeoDa application was used to obtain the regression analysis of the effect of waves on shoreline changes. The results showed that there were similar patterns of shoreline changes between monsoon and west monsoon, although the value were different. Coastal erosion occurs in almost all Takalar coastal area. Some areas that have a high coastal erosion value were the sub-district of South Galesong and Mappakasunggu while the areas that have a high accretion value were the sub-districts of Sanrobone, Mappakasunggu, and Mangarabombang. The waves had a significant influence on changes in shoreline in both the monsoon and west monsoon (P <0.05) with a percentage of 17,2% for the monsoon and 7.3% for the west monsoon which indicated there were other factors that influence shoreline change besides the wave factor on the Takalar Coast. Deteksi perubahan garis pantai perlu dilakukan dalam rangka pengawasan dan perencanaan pengelolaan di suatu kawasan, salah satunya di Pesisir Kabupaten Takalar, Sulawesi Selatan. Penelitian ini bertujuan untuk memetakan perubahan garis pantai di Kabupaten Takalar berdasarkan musim dan melihat pengaruh gelombang terhadap perubahan tersebut. Penelitian ini menggunakan data Citra Satelit Landsat tahun 1998-2018, dan data gelombang yang diperoleh dari Copernicus Marine Environment Monitoring Services (CMEMS). Ekstraksi data garis pantai menggunakan pendekatan perkalian single band dan ratio band sedangkan perhitungan laju perubahan garis pantai menggunakan aplikasi Digital Shoreline Analysis System (DSAS). Analisis regresi untuk melihat pengaruh gelombang terhadap perubahan garis pantai menggunakan aplikasi GeoDa. Hasil penelitian menunjukkan terdapat pola yang hampir sama antara perubahan garis pantai musim timur dan musim barat meskipun dengan besaran yang berbeda. Abrasi terjadi hampir di seluruh Pesisir Takalar. Daerah yang memiliki nilai abrasi yang tinggi yaitu Kecamatan Galesong Selatan dan Mappakasunggu sedangkan daerah yang memiliki nilai akresi tinggi yaitu Kecamatan Sanrobone, Mappakasunggu, dan Mangarabombang. Gelombang memberikan pengaruh yang signifikan terhadap perubahan garis pantai baik pada musim timur maupun barat (P<0,05) dengan persentase 17,2% untuk musim timur dan 7,3% untuk musim barat yang mengindikasikan terdapat faktor lain yang ikut mempengaruhi perubahan garis pantai selain faktor gelombang di Pesisir Takalar.


2021 ◽  
Vol 24 (3) ◽  
pp. 353-363
Author(s):  
Fortunata Riana ◽  
Abdus Salam Junaedi ◽  
Muhammad Zainuri

Fish is a source of animal protein which is generally the choice of society because it is relatively cheap and easy to obtain. Fish that are sold in dead condition are prone to quality degradiation so that bacteria can easly breed. Data on the amount of bacteria in fish related to the type of gear to another which can greatly affect the quality of the catch. Therefore, this research was conducted using a Minitrawl. The research objective was to see the amount of bacteria in fish caught using a mini fishing boat before being given and after being notified by considering the amount of bacteria in the substrate in the waters, sea water and ice cubes used by fishermen. The TPC (Total Plate Count) research method using Tryptic soy Agar (TSA) as media and pathogenic bacteria using Thiosulfate Citrate Bile Salt Sucrose Agar (TCBS) as media on fish “kardinal pita lebar” (Apogon fasciatus), sea water, substrate in the waters, and ice cubes that use for operating Minitrawl. The result of this research showed value TPC heterotrophic bacteria (TSA) which contaminated sample ITE (fish wihthout ice) 9,89 Log CFU/ml, IS (fish with ice) 9,85 Log CFU/ml, AL (sea water)  4,91 Log CFU/ml, S (substrate in the waters) 5,28 Log CFU/ml and ES (ice cubes that use for fishermen) 3,29 Log CFU/ml amount of pathogenic bacteria (TCBS) in ITE 5,27 Log CFU/ml , IS 3,24 Log CFU/ml,  AL 3,45 Log CFU/ml, S 1,78 Log CFU/ml, ES 3,87 Log CFU/ml,most highest amount is in the ITE with value of TPC heterotrophic bacteria (TSA) 9,89 Log CFU/ml and pathogenic bacteria (TCBS) 5,27 Log CFU/ml.  Ikan merupakan sumber protein hewani yang umumnya menjadi pilihan masyarakat karena memiliki harga yang relatif murah dan mudah didapat. Ikan yang dijual dalam kondisi telah mati rentan terhadap penurunan kualitasnya sehingga bakteri dapat dengan mudah berkembang biak. Data tentang kelimpahan bakteri pada ikan sehubungan dengan jenis alat tangkap perlu menjadi perhatian dengan mempertimbangkan metode penangkapan yang berbeda antara satu alat tangkap dengan alat tangkap lainnya yang sangat mungkin mempengaruhi kualitas hasil tangkapannya. Oleh karena itu, penelitian dilakukan dengan menggunakan MiniTrawl. Tujuan penelitian adalah untuk mengetahui kelimpahan bakteri pada ikan yang ditangkap menggunakan MiniTrawl sebelum diberi es dan sesudah diberi es dengan mempertimbangkan kelimpahan bakteri di substrat perairan dan es batu yang digunakan nelayan. Metode penelitian TPC (Total Plate Count) menggunakan media Tryptic Soy Agar (TSA) dan bakteri patogen menggunakan media Thiosulfate Citrate Bile Salt Sucrose Agar (TCBS) pada ikan kardinal pita lebar (Apogon fasciatus), air laut, substrat perairan dan es batu yang digunakan pada pengoperasian MiniTrawl. Hasil penelitian menujukkan nilai TPC bakteri heterotrof (TSA) yang mengkontaminasi sampel ITE (ikan tanpa es) 9,89 Log CFU/ml, IS (ikan dengan es) 9,85 Log CFU/ml, AL (air laut) 4,91 Log CFU/ml, S (substrat perairan) 5,28 Log CFU/ml dan ES (es batu yang digunakan nelayan) 3,29 Log CFU/ml. Kelimpahan bakteri patogen (TCBS) pada ITE 5,27 Log CFU/ml, IS 3,24 Log CFU/ml,  AL 3,45 Log CFU/ml, S 1,78 Log CFU/ml, dan ES 3,87 Log CFU/ml. Kelimpahan tertinggi yaitu pada ITE dengan nilai TPC bakteri heterotrof (TSA) 9,89 Log CFU/ml dan bakteri patogen (TCBS) 5,27 Log CFU/ml.


2021 ◽  
Vol 24 (3) ◽  
pp. 343-352
Author(s):  
Diana Rachmawati ◽  
Johannes Hutabarat ◽  
Ayu Istiana Fiat ◽  
Tita Elfitasari ◽  
Seto Windarto ◽  
...  

Vannamei shrimp (Litopenaeus vannamei) is one of the leading fishery products of the fisheries sector. The problem that is often found in the failure of vannamei shrimp productions is the high level of mortality due to the nature of cannibalism during molting. One solution to minimize the cannibalism of vannamei shrimp is to provide tryptophan supplements in a feed. Tryptophan is a type of essential amino acid that serves as a precursor for serotonin biosynthesis. This study aims to determine the effect and optimal dose of tryptophan added to feed to reduce cannibalism and growth of vannamei shrimp. The test fish used in this study were vannamei shrimp with an average weight of 0,81 ± 0,26 g/individual.  This study used an experimental method, a completely randomized design (CRD) consisting of 4 treatments and three replications. The test feed used in this study was artificial feed with a protein content of 38% plus tryptophan according to treatments A (0%/kg feed), B (0.75%/kg feed), C (1.5%/kg feed), and D (2.25%/kg feed). The results showed that the addition of Tryptophan in the feed had a noticeable effect (P<0,05) on cannibalism levels, survival, and molting rates but had no significant effect (P>0,05) on absolute weight growth, specific growth rates, efficiency ratios protein and efficiency feed utilization of vannamei shrimp. The best dose of tryptophan addition in feed to lower the rate of vannamei shrimp cannibalism in this study was 2,25%, capable of producing a cannibalism rate of 13,33%. Udang vaname (Litopenaeus vannamei) merupakan salah satu produk perikanan unggulan sektor perikanan. Permasalahan yang sering ditemukan dalam kegagalan produksi udang vaname adalah tingginya tingkat mortalitas karena adanya sifat kanibalisme pada saat terjadi molting. Solusi untuk meminimalisir kanibalisme udang vaname adalah dengan memberi suplemasi asam amino pada pakan, salah satunya adalah triptofan. Triptofan merupakan salah satu jenis asam amino esensial yang berfungsi sebagai prekursor untuk biosintesis serotonin. Penelitian ini bertujuan untuk mengkaji pengaruh dan dosis optimal triptofan yang ditambahkan ke dalam pakan untuk menurunkan tingkat kanibalisme dan pertumbuhan udang vaname. Ikan uji yang digunakan pada penelitian ini adalah udang vaname dengan bobot rata-rata 0,81±0,26 g/ekor. Penelitian ini menggunakan metode eksperimen, rancangan acak lengkap (RAL) yang terdiri atas 4 perlakuan dan 3 kali ulangan. Pakan uji yang digunakan dalam penelitian ini adalah pakan buatan dengan kandungan protein 38% ditambah triptofan sesuai perlakuan yaitu : A (0%/kg pakan), B (0,75%/kg pakan, C (1,5%/kg pakan), dan D (2,25%/kg pakan). Hasil penelitian menunjukkan bahwa penambahan triptofan dalam pakan berpengaruh nyata (P<0,05) terhadap tingkat kanibalisme, kelulushidupan dan tingkat molting, namun tidak berpengaruh nyata (P>0,05) terhadap pertumbuhan bobot mutlak, laju pertumbuhan spesifik, protein efisiensi rasio dan efisiensi pemanfaatan pakan. Dosis terbaik dari pemberian triptofan dalam pakan untuk menurunkan tingkat kanibalisme udang vaname dalam penelitian ini adalah 2,25%, mampu menghasilkan tingkat kanibalisme sebesar 13,33%.


2021 ◽  
Vol 24 (3) ◽  
pp. 333-342
Author(s):  
WD. Syarni Tala ◽  
Kusrini Kusrini ◽  
Jumiati Jumiati

Echinoderms are one of organisms that inhabit intertidal areas which have important ecological roles in marine ecosystems, also have high economic values. The community structure and distribution pattern of Echinoderms in the intertidal area can provide an overview of the condition of the Echinoderm community. This research aims to determine the community structure of Echinoderms in various habitat types in the intertidal areas of Lakeba Beach, Baubau Town. The community structure of Echinoderms were observed using quadratic transec method. Echinoderms found were 777 individuals consisting of 18 species from 5 classes. Echinoderms were distributed in four habitat types, i. e. sandy, sand covered with seagrass, rocky, and rock covered with algae habitats. The highest abundance of Echinoderm was Ophiocoma scolopendrina (Ophiuroidea) and the lowest were Maretia planulata, Arachnoides placenta (Echinoidea), Holothuria scabra, H. leucospilota, Stichopus horrens (Holothuroidea), and Isocrinidae (Crinoidea). The species diversity of Echinoderms was categorized as moderate (H’ = 1,42180), species evenness was moderate (E = 0,49191), and no dominant species of Echinoderm community (D = 0,36601). Echinoderm community living in the intertidal area was influenced by antropogenic factors.  Echinodermata merupakan salah satu organisme yang mendiami daerah intertidal yang memiliki peran ekologis penting bagi ekosistem laut, juga memiliki nilai ekonomis yang tinggi. Struktur komunitas dan pola distribusi Echinodermata pada daerah intertidal dapat memberikan gambaran mengenai kondisi komunitas Echinodermata. Penelitian ini bertujuan untuk mengetahui struktur komunitas dan pola distribusi Echinodermata di daerah intertidal Pantai Lakeba, Kota Baubau. Struktur komunitas dan pola distribusi Echinodermata diamati menggunakan metode transek kuadrat. Echinodermata yang ditemukan berjumlah 777 individu yang terdiri atas 18 jenis dari 5 kelas. Echinodermata terdistribusi pada empat tipe habitat yaitu habitat pasir, pasir yang ditutupi lamun, batu, dan batu yang ditutupi alga. Echinodermata yang memiliki kelimpahan tertinggi adalah Ophiocoma scolopendrina (Ophiuroidea) dan kelimpahan terendah adalah Maretia planulata, Arachnoides placenta (Echinoidea), Holothuria scabra, H. leucospilota, Stichopus horrens (Holothuroidea), dan Isocrinidae (Crinoidea). Keanekaragaman jenis Echinodermata dikategorikan sedang (H’ = 1,42180), kemerataan jenis sedang (E = 0,49191) dan tidak ada jenis yang dominan dalam komunitas Echinodermata (D = 0,36601). Komunitas Echinodermata yang hidup di daerah intertidal pantai dipengaruhi oleh faktor antropogenik.


2021 ◽  
Vol 24 (3) ◽  
pp. 375-384
Author(s):  
Mustagfirin Mustagfirin ◽  
Diah Permata Wijayanti ◽  
Subagiyo Subagiyo

Sea cucumbers are marine organisms that live in coral reef ecosystem habitats and their associations. Sea cucumbers have been used by communities as food, cosmetics and traditional medicine in various countries. The benefits and high economic value of sea cucumbers make fisheries activities occured massively and continuously. Sea cucumbers were large commodity from Indonesian waters. However, until now it has not received proportional attention. The lack of information on morphometry, spawning in various regions has made the commodity of sea cucumbers decreased. This research was conducted to determine the character of commercial sea cucumber commodities in Pulau Nyamuk, to the occurrence of spawning based on the moon phase. This research was conducted in September - November 2020. This research method uses an analysis approach of gonadal maturity index in determining the spawning of sea cucumbers. The results showed that commercial sea cucumbers in Pulau Nyamuk were Pisang (Holothuria sp.) and Gamat (Stichopus sp.) Sea cucumber. This sea cucumber weighs 300-690 grams wet. Sea Cucumbers, Pisang and Gamat tend to have high IKG values in the new moon phase with IKG index values >10%.  Teripang merupakan organisme laut yang hidup pada habitat ekosistem terumbu karang dan asosiasinya. Teripang telah dimanfaatkan oleh masyarakat di sekitar pantai sebagai bahan makanan, kosmetik serta obat tradisional di berbagai negara. Manfaat serta nilai ekonomi teripang yang tinggi membuat aktivitas pemburuan terjadi secara masif dan terus menerus. Teripang juga merupakan komoditas besar yang berasal dari Perairan Indonesia. Namun hingga saat ini belum memperoleh perhatian yang proporsional. Minimnya informasi mengenai morfometri, pemijahan di berbagai daerah membuat komoditas teripang turun secara drastis. Penelitian ini dilakukan untuk mengetahui karakter komoditas teripang komersial di Pulau Nyamuk, hingga terjadinya pemijahan berdasarkan fase bulan. Penelitian ini bulan September - November 2020 di Perairan Pulau Nyamuk Kecamatan Karimunjawa, Kabupaten Jepara. Metode penelitian ini menggunakan pendekatan analisis indeks kematangan gonad dalam menentukan pemijahan teripang. Hasil penelitian menunjukkan bahwa teripang komersial di Pulau Nyamuk adalah jenis teripang Pisang (Holothuria sp.) dan Gamat (Stichopus sp.). Teripang ini mempunyai berat 300-690 gram basah. Teripang Pisang dan Gamat cenderung mempunyai nilai IKG yang tinggi pada bulan baru dengan nilai indeks IKG >10%.


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