<strong style="box-sizing: border-box; font-weight: bold; color: #222222; font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 15px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration-style: initial; text-decoration-color: initial;">Journal of Tropical Marine Science<span style="color: #222222; font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 15px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration-style: initial; text-decoration-color: initial; display: inline !important; float: none;"> (JTMS, e-ISSN: 2623-2235) adalah terbitan open-access diterbitkan oleh Program Studi Ilmu Kelautan, Universitas Bangka Belitung, Indonesia. Journal of Tropical Marine Science menyediakan media daring untuk mempublikasikan artikel ilmiah dari hasil penelitian dan pengembangan di bidang kelautan dan oseanografi. Dalam satu tahun terbit 3 issue
Karakterisasi Bakteri Patogen Vibrio Parahaemolyticus Pada Bawal Bintang (Trachinotus blochii) Dari Perairan Teluk Hurun, Lampung
Industri perikanan budidaya laut menghadapi tantangan besar dalam pengendalian penyakit yang disebabkan oleh bakteri patogen. Salah satu patogen yang sering menyerang ikan budidaya adalah Vibrio parahaemolyticus, yang dapat menyebabkan vibriosis pada ikan laut. Penelitian ini bertujuan untuk mengetahui karakter bakteri patogen Vibrio parahaemolyticus yang ditemukan pada ikan Bawal Bintang (Trachinotus blochii) di perairan Teluk Hurun, Lampung, serta menguji potensi antibakterinya. Karakterisasi bakteri V. parahaemolyticus meliputi uji media selektif CHROMagar Vibrio (CV), konfirmasi gen toxR dengan metode PCR, aktivitas hemolitik pada medium blood agar plate (BAP) uji biokimia dengan metode API 20E, uji patogenisitas secara in vio pada bawal bintang, dan uji sensitivitas terhadap antibiotik dan bahan antimikrobia. Hasil penelitian menunjukkan bakteri V. parahaemolyticus tumbuh pada media CAV dengan warna biru kemerahan, teramplifikasi gen toxR, hemolitik positif, morfologi koloni berwarna krem dengan tepi bergelombang, mampu memfermentasi beberapa karbohidrat, termasuk glukosa, mannitol, dan sukrosa. Uji patogenisitas in vivo pada ikan bawal bintang menunjukkan gejala klinis berupa lesu, peradangan pada sirip, dan perdarahan, yang menandakan bahwa Vibrio parahaemolyticus merupakan patogen penyebab vibriosis pada ikan. Uji antibakteri menunjukkan bahwa enrofloxacin adalah antibiotik yang paling efektif, diikuti oleh tetrasiklin dan oksitetrasiklin. Ekstrak jintan hitam menunjukkan hasil yang lebih bervariasi, meskipun tetap menunjukkan potensi antibakteri alami. Penelitian ini diharapkan dapat memberikan dasar yang lebih kuat untuk pengendalian vibriosis di perikanan budidaya serta mendorong pengembangan alternatif antibakteri alami.
Copyright (c) 2025 Rakhmat Hadi Saputra, Agus Setiawan, Sumardi Sumardi, Yudha Trinoegraha Adiputra, Ni Luh Gede Ratna Juliasih (Author) http://creativecommons.org/licenses/by-sa/4.0
Analisis Sedimentasi Di Perairan Pesisir Kota Pangkalpinang, Provinsi Kepulauan Bangka Belitung
Perairan pesisir Kota Pangkalpinang mengalami pendangkalan yang disebabkan oleh tingginya aktivitas antropogenik maupun peristiwa alamiah, sehingga dapat merubah pola dan karakteristik sedimen pesisir pantai baik secara fisik ataupun kualitas. Upaya penanggulangan masalah tersebut salah satunya dibangun breakwater atau pemecah gelombang. Tujuan dari penelitian ini untuk mengetahui karakteristik sedimen, nilai Total Suspended Solid (TSS), dan nilai laju sedimentasi di perairan pesisir Kota Pangkalpinang menggunakan sediment trap. Penelitian ini menggunakan metode purposive sampling yaitu menentukan lokasi pengambilan sampel berdasarkan pertimbangan. Penelitian dilakukan pada bulan februari 2023 dengan 8 titik stasiun. Menggunakan dua jenis data, yaitu data primer dan sekunder. Berdasarkan penelitian yang telah dilakukan, didapatkan hasil karakteristik sedimen yaitu lempung, lempung berpasir, pasir dan pasir berlempung dengan nilai TSS tertinggi berada di stasiun 1,3,7,dan 8 yang melewati baku mutu air laut berdasarkan PP RI No. 22 tahun 2021, sedangkan untuk nilai massa dan volume laju sedimentasi berkisar 0,23-2,33 gr/cm2/hari dan 0,60 – 1,91 mg/cm2/hari.
Copyright (c) 2025 Hazimah Bakhitah, Aditya Pamungkas, Irma Akhrianti (Author) http://creativecommons.org/licenses/by-sa/4.0
Abundance Of Coral Reef Fishes In The Waters Of Gelasa Island, Central Bangka District
Gelasa Island has a coral reef ecosystem as a habitat for biota including coral reef fish, turtles, and others. The coral reef has been damaged due to anthropogenic activities. The purpose of the study was to determine the percentage of coral reef cover and the abundance of coral reef fish. The study was conducted in March 2024 in the waters of Gelasa Island. The method used was UPT (Underwater Photo Transect) for coral reefs and UVC (Underwater Visual Census) for coral reef fish, and the PAST 4.03 application to determine the diversity, uniformity, and dominance index. The results of the study showed that the percentage of coral reef cover in the waters of Gelasa Island was in the good category with an average of 52.42%. The abundance of coral reef fish was 49,114 ind/ha in the very rare category. The highest abundance of coral reef fish species was Neopomacentrus anabatoides, Pomacentrus alexanderae, and Caesio cunning. Based on the category, major fish have the highest abundance. The diversity value is in the moderate category, the uniformity value indicates an unstable community, and the dominance value is in the low category.
Copyright (c) 2025 Jemi Ferizal, M. Rizza Muftiadi, Aditya Pamungkas, Syahrin Imron Hidayat, Ervan Maulana, Muhammad Fajar Hidayatullah (Author) http://creativecommons.org/licenses/by-sa/4.0
Study Of Tourism Suitability And Ecological Carrying Capacity Of Minang Rua Beach In South Lampung District As An Ecotourism Destination
Tourism suitability analysis is important to determine the suitability of an area for beach recreation according to its ecological carrying capacity. This study aims to analyze the suitability and carrying capacity of the ecotourism area at Minang Rua Beach, South Lampung Regency, Lampung Province. Data collection of physical parameters of the beach was carried out using the field observation method. Data were analyzed using the tourism suitability index and area carrying capacity. The results showed that the ecotourism suitability index for beach recreation at Minang Rua Beach at station 1 was 2.875, at station 2 was 3.000, and at station 3 was 2.430. The level of suitability for beach recreation at Stations 1 and 2 was categorized as very suitable (S1), while at Station 3 was categorized as suitable (S2). The carrying capacity of the area at Minang Rua Beach for beach recreation activities at Station 1 was 119 people/day, at Station 2 was 364 people/day and at Station 3 was 158 people/day. The managers of this area are expected to be able to implement tourism activities according to their ecological carrying capacity so that their sustainability can be maintained.
Copyright (c) 2025 Doni Widyasmoro, Hari Kaskoyo, Abdullah Aman Damai, Nur Efendi, Endro Prasetyo Wahono (Author) http://creativecommons.org/licenses/by-sa/4.0
Struktur Komunitas Dan Status Konservasi Ikan Hasil Tangkapan Dengan Alat Tangkap Sero DiDesa Tanjung Binga Kabupaten Belitung
Penelitian ini bertujuan untuk mengetahui komposisi jenis, keanekaragaman, keseragaman, dominansi dan status konservasi pada Sero. Penelitian ini dilaksanakan pada bulan Januari 2024 di Pantai Secupak Desa Tanjung Binga. Hasil penelitian ditemukan yaitu 2.257 individu terdapat 53 spesies ikan dan 37 famili. Komposisi jenis per stasiun tertinggi di stasiun 1 nilainya 8,73% yaitu Selar crumenophthalmus, Sardinella albella, dan Apogonichthyoides melas. Stasiun 2 nilainya 10,87% yaitu Selar crumenophthalmus dan stasiun 3 nilainya 19,41% yaitu Siganus canaliculatus. Hasil penelitian komposisi jenis secara keseluruhan tertinggi yaitu Siganus canaliculatus nilainya 13,07% dan 295 individu. Komposisi jenis terendah nilainya 0,27% dan 6 individu, yaitu Echeneis naucrates dan Carangoides malabaricus. Keanekaragaman jenis ikan kategori Sedang, keseragaman kategori Rendah dan dominansi kategori Rendah. Status konservasi ikan yaitu kategori IUCN Redlist seluruh status berisiko rendah, kekurangan data dan Tidak dievaluasi. CITES seluruh ikan status Tidak Dievaluasi dan Permen KP No 1 Tahun 2021 seluruh jenis ikan status Tidak dievaluasi.
Copyright (c) 2025 Lonameta Lonameta, Andi Gustomi, M. Rizza Muftiadi (Author) http://creativecommons.org/licenses/by-sa/4.0
The Relationship Between Surface Water Quality And Mangrove Density On Pasaran Island, East Telukbetung District, Bandar Lampung City
The decline in mangrove land cover is a serious concern, because it can increase the possibility of sea water intrusion in coastal areas. This research aims to assess the relationship between surface water quality and mangrove density on Pasaran Island. The data obtained were analyzed using the multiple linear regression method to evaluate the simultaneous influence of mangrove density and sampling zone on various water quality parameters, including salinity, dissolved oxygen, electrical conductivity, total dissolved solids, and pH. The research results show that the denser the mangrove density, the lower the salinity level, but the density does not affect other water quality parameters, such as: dissolved oxygen, electrical conductivity, total dissolved solids, pH. The sampling zone also influences several water quality parameters, where zones closer to the coastline show higher parameter values ​​than transition zones or those further from the coast. External factors such as sea water intrusion and domestic waste pollution play a greater role in influencing water quality. The government should make efforts to conserve and rehabilitate forests and mangrove lands, especially in urban areas.
Copyright (c) 2025 Jundy Zaky Makarim, Slamet Budi Yuwono, Indra Gumay Febryano, Arief Darmawan, Irwan Sukri Banuwa (Author) http://creativecommons.org/licenses/by-sa/4.0
Access To Capital: Limitations For Small Fisherman In Gudang Lelang, Bandar Lampung City
Access to capital is very important in the development of small fishery businesses. This study aims to analyze the access to the capital of small fishermen in Bandar Lampung City Gudang Lelang. The research method uses a qualitative approach with a case study method. Data was obtained by in-depth interviews, participant observation, and document analysis; Furthermore, it was analyzed to explain the access to capital of small fishermen. The results of the study show that most small fishermen have difficulties accessing capital through banks. Most of them access non-formal capital, such as mobile lending, a door-to-door system known as bank keliling, loan sharks, Madani Mekaar National Capital, Syariah National Retirement Savings Bank, and Amartha. In addition, fishermen were used to borrowing money from skippers, subscription stalls, or their families to meet their needs at sea. They need the government’s support and mentoring in accessing bank capital to develop their businesses. Capital difficulties for fishermen’s businesses should be evaluated by banks to provide a more flexible system that is easily accessible.
Copyright (c) 2025 Darius Sesario Maloring, Abdullah Aman Damai, Erna Rochana, Maya Riantini, Indra Gumay Febryano (Author) http://creativecommons.org/licenses/by-sa/4.0
Analisa Morfometri Juvenil Ikan Kerapu Cantang (Epinephelus fuscoguttatus X Epinephelus lanceolatus) Ukuran 10 Cm Hingga 12 Cm
Morfometri merupakan suatu penandaan ukuran bagian-bagian tertentu dari struktur badan ikan. Karakter yang digunakan dalam kajian morfometrik yaitu berat badan, panjang total, panjang standar, tinggi badan, lebar badan dan panjang operkulum. Penelitian bertujuan untuk mengetahui gambaran, variasi morfometri luar dan perbedaan signifikansi dalam morfometrik ikan kerapu cantang antar kelompok ukuran 10 hingga 12 cm. Hasil penelitian menunjukkan Terdapat variasi morfometrik juvenil ikan kerapu cantang dari ukuran 10 cm hingga 12 cm. Ukuran 10 cm menunjukkan panjang standar 85,54 mm, berat badan 20,43 g, tinggi badan 30,47 mm dan lebar badan 16,75 mm sedangkan untuk ukuran 11 cm menunjukkan panjang standar 97,73 mm, berat badan 30,03 g, tinggi badan 32,08 mm dan Lebar Badan 19,09 mm. Selanjutnya ukuran 12 cm menunjukkan panjang standar 104,90 mm, berat badan 35,99 g, tinggi badan 32,40 mm dan lebar badan 18,25 mm. Berdasarkan uji varian yang telah dilakukan terdapat perbedaan yang signifikan antar kelompok ukuran yang telah di bandingkan.
Copyright (c) 2025 Dicky Ananda Wahyudi, Kadek Lila Antara, Ni Nyoman Dian Martini (Author) http://creativecommons.org/licenses/by-sa/4.0
Analisis Perubahan Batimetri Di Perairan Matras Kabupaten Bangka
Matras Beach is one of the beaches in the Bangka Belitung Islands which is used as a tourist spot. A bathymetric map is a spatial data that contains depth information (bathymetry information) for a water area. This study aims to determine changes in bathymetry in the 2015, 2019 and 2021 timeframes. The method used in this study is a descriptive method with a purposive sampling data collection technique including primary data and secondary data. The results showed that in 2015-2019 the total change in depth that occurred at the cross section line was an average of 0.805 m and an average total shallowing of 0.165 m. In 2019-2020 the total depth change that occurred was an average of 7.145 m and an average total shallowing of 0.492 m. This change causes the formation of crevices around the breakwater (area A) and around the sea (area B) caused by tin mining.
Copyright (c) 2024 Afi Ayinah http://creativecommons.org/licenses/by-sa/4.0
Potensi Antikanker Pada Ekstrak Etanol Makroalga Caulerpa racemosa Menggunakan Metode Brine Shrimp Lethality Test (BSLT)
Caulerpa racemosa is one of the green macroalgae that is widely distributed in the coastal areas of Lampung Province and needs to be explored as a phytopharmaceutical ingredient because it is thought to have bioactive compounds. In this study, we also used taurine, which is known to prevent cell and tissue damage due to oxidative processes, to explore its potential as an anticancer. The initial stage of this research is phytochemical screening of 96% ethanol extract of Caulerpa racemosa and contains phenolic compounds . alkaloids, saponins, flavonoids, tannins, steroids and terpenoids. The toxicity test of Caulerpa racemosa ethanol extract and taurine used the BSLT method (Brine Shrimp Lethality Test). In this study, 7 concentrations were used, namely 0 ppm (control); 62.5; 125; 250; 500; 1000; and 2000 for both Caulerpa racemosa and taurine ethanol extracts with 5 repetitions. Meanwhile, the toxicity test results showed that the LC50 value of Caulerpa racemosa ethanol extract was 194.14 ppm and 170.69 ppm for taurine, this values are between 100 ppm - 1000 ppm of Caulerpa racemosa ethanol and taurine indicate that both material have potential anticancer activity with low toxicity.
Copyright (c) 2025 Devi Ardiyati Khasana, Endang Linirin Widiastuti, Nuning Nurcahyani, Agus Setiawan, Ni Luh Gede Ratna Juliasih (Author) http://creativecommons.org/licenses/by-sa/4.0
Perubahan Luas Dan Kerapatan Mangrove Di Kawasan Pesisir Kota Serang, Banten
Changes in the area and density of mangroves have a major impact on the sustainability of ecosystem functions in coastal areas. This study aims to analyze changes in the area and density of mangroves in Serang City, Banten. The method used is remote sensing through interpretation of Landsat 5 and Landsat 8 images with analysis of changes in the area and density of mangroves in 2011 and 2021. The research procedure was carried out by grouping NDVI values ​​into 3 vegetation classes: sparse, moderate, and dense. Furthermore, a ground check was carried out to test the level of data accuracy against mangrove canopy cover using the hemispherical photography method. The results showed that the level of image accuracy in 2021 was 90%. Based on this analysis, it is known that there has been a decrease in the area and changes in mangrove density in Sawah Luhur Village, while in Banten Village it has increased. In general, in the coastal area of ​​Serang City, there was a decrease in the mangrove area between 2011-2021 which reached 13.95 ha with the main decrease occurring in mangroves with sparse vegetation class (33.14 ha). In contrast, mangroves with medium and dense density categories increased to 19.19 ha. The decrease in mangrove area was due to abrasion, conversion into ponds, and illegal logging. The results of the analysis also showed that the correlation between NDVI values ​​and the percentage of canopy cover had a value of 0.696 which was included in the strong category.
Copyright (c) 2025 Indra Gumay Yudha, Risma Warni Rahayu, Darma Yuliana, Abdullah Aman Damai (Author) http://creativecommons.org/licenses/by-sa/4.0
Pengaruh Ekstrak Kulit Bawang Merah Terhadap Daya Hambat Bakteri Aeromonas hidrophilla Penyebab Penyakit Pada Ikan Secara In Vitro
Aeromonas hydrophila, commonly found in aquatic environments, is a Gram-negative bacterium frequently pathogenic to fish, causing diseases such as hemorrhagic septicemia or Motile Aeromonas Septicemia (MAS) in various freshwater fish species. This study investigated the antibacterial potential of red onion skin extract (Allium cepa L.) extracted using 99% absolute alcohol against the growth of Aeromonas hydrophila. The experiments were conducted with varying extract concentrations of 5%, 10%, 15%, 20%, and 25%, using tetracycline as a control. The results demonstrated that the red onion skin extract was able to inhibit the growth of Aeromonas hydrophila, as indicated by the formation of inhibition zones around the growth media. The average diameters of the inhibition zones produced by the extract at concentrations of 5%, 10%, 15%, 20%, and 25% were 1.21 mm, 2.43 mm, 3.36 mm, 5.70 mm, and 6.23 mm, respectively. Statistical analysis using a One-way ANOVA test with SPSS software showed a p-value of 0.000, indicating a significant difference among the red onion skin extract concentrations. Therefore, a Least Significant Difference (LSD) post-hoc test was performed to identify specific differences between the concentration treatments
Copyright (c) 2025 Andi Welly Wiliandhana Pranata, Ida Bagus Jelantik Swasta, Gede Iwan Setiabudi (Author) http://creativecommons.org/licenses/by-sa/4.0
Fishermen's Insurance Program In Bandar Lampung City Based On An Institution Perspective
The low sustainability of participation in the Fishermen’s Insurance Premium Assistance program shows that there is an Institution issue. The research intents to analyze the institution of the fishermen’s insurance program in Bandar Lampung City. This study used the case study method as a qualitative approach. Data were obtained by in-depth interviews, participant observation, and document analysis. Analysis is used to describe institutions based on situation, structure, behavior, and performance. The results of the study show that the efforts of the insurance program in Bandar Lampung City to protect fishermen have not been achieved in the second year. This occurred because the insurance participants did not pay the premium independently or at personal expense. The fishermen are not interested in participating in insurance, in spite of the premium cost being economical. Institutions are included in the BPAN program, which plays an important role in determining the continuation of fishermen’s insurance participation. The government should consider the punishment and agreements that must be submissive by fishermen to become effective regulation. In addition, the Social Security Administrator for Employment, as an insurance provider, must accommodate the simple insurance premium payments for fishermen.
Copyright (c) 2025 Nia Octavia, Supono Supono, Abdullah Aman Damai, Zainal Abidin, Indra Gumay Febryano (Author) http://creativecommons.org/licenses/by-sa/4.0
Distribution Institution Of Subsidized Fuel For Fishermen In Kangkung Village, Bandar Lampung City
The distribution of subsidized fuel for fishermen is largely determined by government regulations and policies. A well-implemented distribution institution ensures that subsidized fuel reaches fishermen appropriately. This study aims to analyze the institutionalization of subsidized fuel for fishermen in Kangkung Village, Bumi Waras District, Bandar Lampung City. The approach used is a qualitative approach with a case study method. Data collection through in-depth interviews, participatory observation and documentation studies. Data processing is carried out to analyze the institutionalization of subsidized fuel distribution for fishermen. The results of the study indicate that fishermen who use diesel fuel obtain subsidized diesel fuel at fishermen's fuel station according to the provisions set by the Downstream Regulatory Agency Committee Oil and Fuel. Not all fishermen can meet the required provisions. This causes there are still fishermen who cannot access subsidized diesel fuel for their business needs. Fishermen who use Pertalite also cannot freely access subsidized pertalite at the fuel station due to less supportive institutional governance. Thus, it is still necessary for the government to improve regulations so that distribution is more effective and controlled, so that subsidized fuel can be accessed evenly by small fishermen.
Copyright (c) 2025 Rostuti Lusiwati Sitanggang, Abdullah Aman Damai, Supono Supono, Maya Riantini, Novita Tresiana, Indra Gumay Febryano (Author) http://creativecommons.org/licenses/by-sa/4.0
Identifikasi Jenis Dan Kepadatan Sampah Laut Anorganik Di Pantai Muara Indah, Kabupaten Tanggamus, Provinsi Lampung
Accumulation of marine waste is a problem for tourist areas, one of which is due to the activities of densely populated settlements around the coast. The study aims to determine the type and density of inorganic waste at Muara Indah Beach, Tanggamus Regency. The method used is purposive sampling with a sampling technique using a transect line. Data analysis was carried out using a quantitative descriptive approach. The waste taken was macro-sized inorganic waste. The results of the study showed that plastic waste dominated the pieces of waste as much as 174.67 pcs with a density of 5.82 pcs/m2. The relative density value of plastic waste reached 84.25%. The lowest density was ceramic waste of 0.03 pcs/m2 with a relative density value of 0.48%. The government and surrounding communities are expected to work together to optimize waste management.
Copyright (c) 2025 Fredy Kurniawan, Hari Kaskoyo, Nur Efendi, Abdullah Aman Damai, Erna Rochana (Author) http://creativecommons.org/licenses/by-sa/4.0
Keberadaan Logam Berat Pb Dan Cu Pada Bycatch Perikanan Bagan Tancap Di Perairan Banyuasin, Sumatera Selatan
Fish and some groups of shrimps and crabs are one of the economically important biota that live in the waters. Accumulation of heavy metals in fish can affect the economic value of marine fishery products. There are several types of fish that contain heavy metals and are harmful when consumed by humans. The purpose of this study was to determine the dominant bycatch fish species and the accumulation of heavy metals Pb and Cu in the bycatch of stationary lift net Pesisir Banyuasin. This study was conducted in November 2019 and the dominant bycatch included japuh fish (Dussumieria acuta), tembang fish (Sardinella fimbriata) and parang-parang fish (Chirocentrus dorab). Samples were taken from one stationary lift net then analysed using SSA (Atomic Absorption Spectrophotometry) with 3 repetitions. The results of the analysis found the average concentration of heavy metals Pb and Cu in japuh fish was 0.65 mg/kg Pb; 0.16 mg/kg Cu. In tembang fish 0.70 mg/kg Pb and 0.03 mg/kg Cu. The parang-parang fish was 0.50 mg/kg and 0.17 mg/kg Cu. Based on the quality standards of SNI, Directorate General of Food and Drug Administration and FAO, the Pb and Cu concentrations of the three types of by-catch fish are still below the quality standard threshold and safe for human consumption.
Copyright (c) 2024 http://creativecommons.org/licenses/by-sa/4.0
Logam Berat Pb, Cu, Zn Dan Ni Dalam Air Di Ekosistem Lamun Pulau Pahawang
In coastal environments and the ecosystems, including seagrass ecosystems, heavy metals can lead to pollution. This study goal is to analyze the concentration of heavy metals in water based on safety standards for marine organisms. Water samples were collected from two locations: Jeralangan HamLet and Cukuh Nyai HamLet in Pahawang Island, Lampung, Indonesia. Water quality parameters were measured in situ. Heavy metals such Pb, Cu, Ni, and Zn were prepared using Wet digestion method and the concentrations were measured using Atomic Absorption Spectrophotometer (AAS) SHIMADZU AA-7000. At the same location, the highest concentration of was observed for Zn 0.406 mg/L at station 2, while the lowest concentration was recorded for Cu 0.019 mg/L. The concentration of heavy metals Pb, Cu, Ni and Zn in water has exceeded the quality standards for marine biota and marine tourism.These research can be used as a basis for future planning in the management of Pahawang Island’s coastal environment.
Toksisitas Ekstrak Daun mangrove Rhizophora stylosa dari Pulau Maspari Sumatera Selatan
The leaves of R. stylosa are a potential source of bioactive compounds for health and pharmacology. The composition of bioactive compounds in the leaves can be influenced by the ecological conditions and geographical location of this small island. This study aims to evaluate the toxicity and composition of bioactive compounds that are toxic in mangrove leaf extracts of R. stylosa from Maspari Island in coastal South Sumatra. A total of 1 kg of R. stylosa leaf samples were taken from Maspari Island then washed thoroughly to remove dirt, cut into small pieces, and dried in the sun using the indirect sunlight method covered with black cloth. The dried leaf samples were then pulverized into powder, and as much as 100 grams of fine powder was macerated with 96% ethanol solvent in a ratio of 1:10 (b/v). The maceration process was carried out for 1 x 24 hours, then the maceration solution was filtered and evaporated using a rotary evaporator at 60°C to become a concentrated extract. Toxicity tests were carried out using the Brine Shrimp Lethality Test (BSLT) method, while the identification of toxic bioactive compounds was carried out through phytochemical tests, total phenol tests, and GC-MS analysis. The test results showed that the LC50 value of R. stylosa leaf extract was 393 mg/mL (moderately toxic). The total phenol content was 442.82 (gGA/g), and the bioactive compounds identified included alkaloids, flavonoids, saponins, terpenoids, and acids such as Hexadecanoic acid, methyl ester, and trans-13-Octadecenoic acid, methyl ester.
Pengaruh Metode Filtrasi Terhadap Peningkatan Kualitas Fisik Air Muara Sungsang, Banyuasin
Water quality in the form of turbidity, colour, odour, taste and suspended residue are significant issues in Sungsang Banyuasin. The filter utilizes a filtration method to remove solid particles and contaminants. The research site consists of Sungsang, Sungsang II, and Sungsang III areas. The purpose of this study was to determine the water quality in the form of colour, taste, odour, turbidity, suspended residue, and salinity, as well as the ability of the filter to overcome water quality. Filtration consists of sedimentation, filter membranes, and filter media consisting of zeolite, silica, anthracite, ferrolite, activated carbon, and bioring. Water quality measurements used organoleptic to determine odour and taste, handrefractometer to measure salinity, direct reading to measure suspended residue, and spectrophotometry to measure colour and turbidity. The breech water was odourless and tasteless, and the suspended residue value ranged from 17-19 mg/L below the quality standard of 50 mg/L. Colour and turbidity values are greater than 50 on their respective scales and salinity values range from 11-13 ppt. The filtration process successfully reduced the values of suspended residue, colour, turbidity, and salinity.
Institution Of Fisherman's Joint Business Group In The Blue Swimming Crab Fishing Efforts In Kuala Teladas Village, Tulang Bawang Regency
The Fishermen's Joint Business Group is a local institution that plays a vital role in sustainable blue swimming crab fishing practices. This study aims to analyze the institution structure of the Joint Business Group in supporting sustainable blue swimming crab fishing efforts in Kuala Teladas Village, Tulang Bawang Regency. This research is a qualitative study whose data collection was carried out through in-depth interviews, participant observation, and documentation study. Data were analyzed to examine the institution and organization structure of the group. The study results show that the Joint Business Group is vital as a collective forum for fishermen to discuss, share information, and access crab resources. The group's simple organization structure with clear rights, obligations, and sanctions in the Articles of Association/Bylaws encourages active participation by members. The implementation of blue swimming crab management policies has brought positive changes to fishermen's behaviour, especially in the use of environmentally friendly fishing gear. However, significant challenges include economic pressures during the lean season, lack of alternative livelihoods, and weak supervision. Increasing the institution capacity of Joint Business Groups is carried out through collaboration between non-governmental organizations, fisheries extension, and the government. This is implemented through socialization, training, and mentoring in organization management, leadership, and business diversification. Grant assistance and alternative business training for fishermen have strengthened the economic position of fishermen. Increasing institution capacity through collaboration with various stakeholders is key to supporting the socio-economic sustainability of fishermen and sustainable blue swimming crab fishing efforts.
Copyright (c) 2025 Winarto Santosa, Qadar Hasani, Supono Supono, Abdullah Aman Damai, Novita Tresiana, Indra Gumay Febryano (Author) http://creativecommons.org/licenses/by-sa/4.0
Penerapan Konsep Blue Economy Pada Budidaya Udang Vaname Melalui Pemetaan Stakeholder Di Kecamatan Rawajitu Timur Kabupaten Tulang Bawang
The purpose of this study was to map the stakeholders involved in efforts to implement the concept of blue economy in vaname shrimp farming in East Rawajitu District, Tulang Bawang Regency. Data were collected using a qualitative approach through in-depth interviews and documentation studies. Data analysis was carried out descriptively to map the stakeholders involved based on their importance and influence. The results showed 21 stakeholders played a role consisting of private government, community and academics. Stakeholders who play a role as players are the Lampung Provincial Government, the Maritime and Fisheries Service, the Tulang Bawang Regency Government, the Tulang Bawang Regency Fisheries Service, which has a very strong interest and influence. Stakeholders who act as context setters are the Ministry of Marine Affairs and Fisheries, Ministry of Environment and Forestry, Commission IV of the House of Representatives, Lampung Marine Aquaculture Center, Mesuji Sekampung River Basin, Fish Quarantine Center for Quality Control and Safety of Fishery Products, INDOGAP Certification Institute, Seed Supplier, Shrimp Buyer, Feed and Medicine Company, P3UWL, KPBD, Yagasu, PPNI, LPMUKP, Universities have a large influence but low importance. The role of stakeholders in the subject category is shrimp farmers, who have a high interest but do not have a strong influence. Crowd stakeholders consist of the East Rawajitu District Government. Cross-sectoral cooperation must be carried out, so that the government's expectations towards applying the concept of blue economy or sustainable shrimp farming can be applied in protecting the environment while still increasing economic growth.
Pemetaan Stakeholder Dalam Peningkatan Kesejahteraan Masyarakat Nelayan Di Pulau Pasaran Kelurahan Kota Karang, Kota Bandar Lampung
The purpose of this study was to map the stakeholders involved in efforts to improve the welfare of fishing communities on Pasaran Island, Kota Karang Village, Bandar Lampung City. The data analysis method was carried out descriptively to map the stakeholders involved based on their interests and influence. The results showed that the players were the Lampung Provincial Government, Bandar Lampung City Government, Bandar Lampung City Fisheries Service, because these stakeholders have a very strong interest and influence. Stakeholders who act as context setters are the Ministry of Marine Affairs and Fisheries, Legislative Members, community leaders, NGOs, Goods and Services Providers, Police and TNI, Universities, because these stakeholders have great influence but low importance. The role of stakeholders with the subject category is small fishermen, namely labor fishermen and fish processing laborers, large fishermen and middlemen. Fishermen are stakeholders who have a high interest, but do not have a strong influence. Stakeholders in the crowd category are the Head of East Teluk Betung Sub-District, Head of Kota Karang Village, Neighborhood and RT officials in Kota Karang Village, because stakeholders, so that the expectations of the government for the provision of the program can be realized and the welfare of the fishing community will increase. In addition, community empowerment can also be carried out through developing the capacities of small fishermen and supporting information in the use of more developed fishing gear by conducting entrepreneurial training, developing skills and expertise for fishermen on Pasaran Island,
Kelimpahan Ikan Chaetodontidae Dan Pomacentridae Di Ekosistem Terumbu Karang, Tanjung Labu
Tanjung Labu waters have a coral reef ecosystem and are rich in a variety of biota such as the Pomacentridae and Chaetodotidae families. This family is an indicator of the health of coral reefs and plays a role in maintaining ecosystem balance. The aim of the research is to calculate the abundance of the Chaetodontidae and Pomacentridae families and analyze the relationship between the abundance of Chaetodontidae and Pomacentridae fish and habitat characteristics in coral reef ecosystems. The research was carried out in March 2024 in the waters of Tanjung Labu. The method used is UPT (Underwater Photo Transect) for coral reefs and UVC (Underwater Visual Census) for coral reef fish and the PAST 4.03 application to determine the relationship. The research results showed that the average live coral cover was 51.15%, and the abundance of the Chaetodontidae and Pomacentridae families was 1/m2. The number of individuals and species of the Chaetodontidae family is 37 individuals and 3 species, while the Pomacentridae family is 386 individuals and 20 species. The Chaetodontiadae family relationship is positively correlated with basic substrate cover components such as abiotic and other fauna, as well as environmental parameters such as brightness and current speed, but is negatively correlated with live coral and the type of coral reef life form, while the Pomacentridae family relationship is positively correlated with the closure component. basic substrates such as coral reef life form and dead coral, as well as environmental parameters such as water depth.
Copyright (c) 2024 Jemi Ferizal, Agnes Puspitasari Sudarmo, Adi Susanto
Identifikasi Morfometrik Belangkas (Family: Limulidae) Di Pantai Tanjung Punai Kabupaten Bangka Barat
Tanjung Punai is one of the beach in the coastal area of ​​West Bangka Regency which has conditions in the form of sandy beaches and mangrove ecosystems. These conditions support various biota that live and develop, one of which is the horseshoe crab. Horseshoe crab are aquatic invertebrates belonging to the phylum Arthropoda and the family Limulidae. The morphometric characters of horseshoe crab doves have different variations based on geographical area. This research aims to identify horseshoe crab based on morphology and morphometrics in Tanjung Punai Beach. The research was carried out in April-May 2022 at Tanjung Punai Beach, West Bangka Regency. The research method uses methods purposive sampling as well as data analysis using Independent Samples T-Test and simple linear regression analysis. The species found is Carcinoscorpius rotundicauda and Tachypleus gigas. The significance value is 0.00 (p < 0.05) and the t value thit > ttab shows that there are differences in the average morphometric characters between the two species.
Aktivitas Antibakteri Ekstrak Isolat Jamur Endofit Aspergillus sp. yang Berasosiasi dengan Mangrove Rhizhopora apiculata terhadap Patogen Ikan Laut
Exploration of microorganisms containing secondary metabolite compounds with antimicrobial properties, especially in marine fish pathogenic bacteria, is urgently required. This study aims to test the antibacterial effectiveness of endophytic fungal extracts from the mangrove plant Rhizopora apiculata in the Petengoran Mangrove Forest against pathogenic bacteria in marine fish such as V. alginolyticus and P. damselae spp. The endophytic fungal isolate found was a fungus from the genus Aspergillus sp after observing its morphological form macroscopically and microscopically. Ethyl acetate extract of mangrove endophytic fungi with a concentration of 500 µg/disc and 1000 µg/disc was dripped onto a 6mm paper disc and then placed on the pathogenic bacterial isolate. Measurement of the diameter of the clear zone produced around the paper disc after 24 hours concluded that the antibacterial effectiveness of the endophytic fungal extract against V. alginolyticus was 27.27% (500 µg/disc) and 32.32% (1000 µg/disc). Meanwhile, its effectiveness against P. damselae spp is 27.27% (500 µg/disc) and 34.82% (1000 µg/disc). The isolate extract from the endophytic fungus Aspergillus in this study has the potential to produce antibacterial compounds in marine fish pathogens.
Copyright (c) 2024 Verli Dharmawati, G. Nugroho Susanto, Nuning Nurcahyani, Abdullah Aman Damai, Afifah Nissa Azzuhdy
Dinamika Perubahan Garis Pantai Di Muara Gembong, Bekasi, Jawa Barat Pada Tahun 2011-2021
Shoreline change can be an increase (accretion) or decrease (abrasion) of land on the coast due to human activities. This research aims to determine shoreline change occurs at Muara Gembong in 2011-2021 using coastline extracted from Landsat satellite imagery with band ratio and composite RGB methods. Shoreline changes were analyzed with Digital Shoreline Analysis (DSAS) using Net Shoreline Movement (NSM), End Point Rate (EPR), and Linear Regression Rate (LRR) statistical methods, to identify distance and rate of coastline change. Muara Gembong area is divided into Zone A located in the south and Zone B located in the north which is directly exposed to the Java Sea. Shoreline change for 10 years showed a tendency to accrete as far as 6.81 m. Rate of shoreline change value 0.18 m/year with accretion rate 12.24 m/year and abrasion rate -7.68 m/year. The total area of abrasion in 10 years comes to 805,562.41 m2 and the area of accretion is 881,897.24 m2. The direction of sediment transport in Zone A leads to the south or to the left of estuary, while in Zone B heading east or right of estuary. It is influenced by the greatest contribution of wave energy that propagates from the northwest.
Hubungan Kerapatan Padang Lamun Dengan Kelimpahan Makrozoobentos Di Pulau Pramuka
Pramuka Island is one of the islands in the Seribu Islands which has a number of marine ecosystems such as seagrass and macrozoobenthos. The aim of this research is to determine the relationship between seagrass density and macrozoobenthos abundance. This research was carried out by applying the purposive sampling method to determine research locations at 3 stations and 3 plots with 50 m transect lines and Pearson Product Moment or simple correlation analysis to determine the relationship between seagrass density and macrozoobenthos abundance. The seagrass species found on Pramuka Island form mixed vegetation with 5 seagrass species and the highest density is Thalassia hemprichii. The macrozoobenthos found included the Holothuroidea, Bivalvia and Gastropod classes with the highest abundance being the Holothuroidea class. The relationship between seagrass density and macrozoobenthos abundance shows a strong relationship with a correlation value of 0.997 and shows a positive (+) linear direction, meaning that the higher the seagrass density value, the higher the macrozoobenthos abundance.
Copyright (c) 2024 Vanya Amelia Putri, Ferry Dwi Cahyadi, Himawan Prasetiyo
Evaluasi Reklamasi Laut PT Timah Tbk Program Artificial Reef Di Perairan Rebo Kabupaten Bangka
This study aims to evaluate the PT TIMAH Tbk sea reclamation program, specifically the artificial reef program. The research was conducted from March to July 2024 at the artificial reef module sinking locations for the Obligatory Years of 2019, 2021, and 2023. The fish data collection method used a modification of the Belt Transect. The biomass calculation method was modified by adding several fish families that are economically valuable target fish. The location of the 2021 Obligatory Year artificial reef modules had the highest number of fish species (40 species), the highest H' value (3.20), and the heaviest biomass (2,908.80 kg/ha). The range of diversity values at all locations was between 1.80-3.20, falling under the criteria of "moderate" and "high." The range of dominance index values was between 0.06-0.36, falling under the "moderate" criteria. The range of evenness values was between 0.34-0.53, falling under the "moderate" and "low" criteria. The range of fish biomass values was between 129.66-2,908.80 kg/ha. The longer the artificial reef modules were submerged, the more schooling fish species increased, while target fish species decreased due to fishing activities. The criteria for the value analysis results refer to the criteria used for natural habitat calculations (coral reefs). Researchers recommend specific value criteria for artificial habitats in disturbed environmental conditions (offshore mining activities).
Copyright (c) 2024 Rahendra Rahendra, M. Taufik Toha, Maulana Yusuf
Lamun Oceana serrulata Di Perairan Provinsi Kepulauan Bangka Belitung
Taxonomically, according to the World Register of Marine Species (WORMS), in 2021 the naming of the species Cymodocea serrulata will change to Oceana serrulata (R. Brown) Byng & Christenh. Many studies have been carried out in the Province of the Bangka Belitung Islands, but this type of distribution map has not been presented in detail. Observation of seagrass in the field allows the identification of seagrasses with other types of seagrass. This study aimed to identify morphology, species distribution, and other types of seagrass often associated with seagrass species Oceana serrulata in the Province of the Bangka Belitung Islands. The methods in this study include data collection, identification, and map making. Morphological identification of seagrass species refers to several identification sources. The distribution map of Oceana serrulata is presented from the seagrass data collection that has been carried out. This research uses data from different times, the first was obtained from 2011 and 2022 as primary data. The results of the study explain the identification carried out on the Oceana serrulata has the same characteristics as identification literature. Similarities seen from the identification of leaf morphology which ribbon curved like, parallel leaf veins and triangular shaped sheaths. Other seagrass species that are most often associated with Oceana serrulata are Halodule uninervis and Enhalus acoroides. The map of the distribution of seagrass species Oceana serrulata is found on the islands of Bangka, Belitung, Anak Air, Lepar, Ketawai, Semujur, Kalimambang, Kelayang, Kepayang, Ruk, and Sebongkok islands.
Copyright (c) 2024 Muhammad Rizza Muftiadi, wahyu Adi, Okto Supratman
Pengaruh Pemberian Pakan Kombinasi Nannochloropsis oculata Dan Terasi Dengan Dosis Yang Berbeda Terhadap Laju Pertumbuhan Rotifera (Branchionus Plicatilis)
Penelitian yang dilakukan bertujuan untuk mengetahui pengaruh kombinasi pakan Chlorella dan terasi yang berbeda terhadap laju pertumbuhan populasi rotifera (Branchiounus plicatilis). Penelitian dilakukan dari bulan Maret sampai dengan bulan Mei 2023 di Kawasan Konservasi Ilmiah Biota Laut Badan Riset dan Inovasi Nasional Gondol Bali. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) dengan 4 perlakuan dan 3 kali ulangan. Perlakuan A sebagai kontrol hanya diberikan pakan Chlorella sebanyak 6,66 x 105 sel/ml perlakuan B yakni Chlorella 6,66 x 105 sel/ml dan terasi 1gr/L. perlakuan C yakni Chlorella 6,66 x 105 sel/ml dan terasi 2gr/L, dan perlakuan D yakni Chlorella 6,66 x 105 sel/ml dan terasi 3gr/L. dengan dosis pemberian pakan kombinasi dilakukan setiap 2 hari sekali. Parameter yang dianalisis hanya laju pertumbuhan populasi dan mencari dosis yang terbaik. Data di olah menggunakan One Way ANOVA dengan tingkat kepercayaan 95% dan jika hasil menunjukkan berbeda signifikan maka dilanjutkan dengan uji Duncan. Hasil penelitian menunjukkan bahwa pertumbuhan populasi Rotifera meningkat dengan pemberian kombinasi pakan Chlorella ditambah terasi dengan dosis 1gr/L. pada perlakuan B pertumbuhan populasi memiliki puncak kepadatan sebanyak 53 ind/ml dengan laju pertumbuhan 0,8741 ind/ml/hari. Jadi dosis terasi terbaik yang diberikan untuk kultur rotifera sebanyak 1gr/L.
Copyright (c) 2024 Komang Putri Regina Paramitha, Jasmine Masyitha Amelia, Hamdanul Fain, Ni Wayan Widya Astuti