Marine Fisheries : Journal of Marine Fisheries Technology and Management
MARINE FISHERIES: Journal of Marine Fisheries Technology and Management is a scientific journal in the field of marine fisheries technology and management. The journal publishes original research and review in scope of fishing gears, fishing technologies, fishing vessels and transportation, fishing port policy and management, and marine fisheries system. This journal has been accredited by Directorate General of Research, Technology and Higher Education Ministry of Research, Technology and Higher Education Republic of Indonesia since 2015. This journal is organized by Communication Forum and Partnership of Capture Fisheries in Indonesia and Department of Fisheries Resources Utilization Faculty of Fisheries and Marine Sciences Bogor Agricultural University. This Journal is published twice a year May and November.
Marine Fisheries Journal is an open access journal and the article's license is CC-BY-NC. This license lets others distribute, remix, tweak, and build upon author's work, as long as they credit the original creation. Authors retain copyright and grant the journal/publisher non exclusive publishing rights with the work simultaneously licensed under a https://creativecommons.org/licenses/by-nc/4.0/. And Authors can still use their work commercially.
Analysis of Ship Motion Response to Hull Line Redesign of The Manado Prototyped Small Purse Seiner
Hull line determines the ship motions in adapting to the ocean conditions, and therefore, ships require a flexibly appropriate hull line to have a highly safe sailing trip. This study aims to determine influence of small purse-seiner hull line redesign on the ship's motion, namely rolling, heaving, and pitching which can be observed as a Response Amplitude Operator (RAO) due to the sea conditions. The hull lines were redesigned by manipulating the ship's breadth (B) and depth (D) based on the Manado prototype, resulting in three new hull forms (ships B, C, D) and one prototype control (ship A). Data input and simulation used the Maxsurf Modeler Advanced and Maxsurf Motions Advanced applications to analyze motion responses at different wave angles (head sea 180°, bow quartering sea 135°, and beam sea 90°) under average load and service speed conditions. The findings demonstrated that each ship had a unique RAO for heave, roll, and pitch motion. In heave and pitch motion, ship D had a best RAO, but in roll motion, ship C had the best RAO. The rolling and pitching motions of all ships have met the minimum standard of the general operability limiting criteria for ships at all conditions, while the rolling motion at the wave coming of 90° was met at the slight and moderate conditions. Keywords: Heaving motion, North Sulawesi-Indonesia, pitching motion, rolling motion, ship motion
Copyright (c) 2026 Heffry Veibert Dien, Revols Dolfi Christian Pamikiran, Lusia Manu, Nani Ingrid Jacquline Undap, Fransisco Philep Theodorus Pangalila, Lefrand Manoppo https://creativecommons.org/licenses/by-nc/4.0
ESTIMATION OF WASTE AND ITS MANAGEMENT STRATEGIES IN THE MODERN FISH MARKET OF MUARA BARU JAKARTA
Modern Fish Market is one of the main fish marketing and culinary tourism centers located in Muara Baru, Jakarta, specifically within the Nizam Zachman Ocean Fishing Port area. The market faces environmental challenges related to solid waste, particularly the mismanagement of inorganic waste. This study aims to estimate the amount and economic value of waste produced, compare existing waste management practices with SNI-19-2454-2002, and formulate appropriate waste management strategies for Modern Fish Market. The research was conducted using a case study approach, and respondents were selected through accidental sampling and purposive sampling techniques. Data were analyzed using descriptive analysis, gap analysis, and SWOT analysis. The results showed that waste generated from fish marketing activities at PIM consisted of 3.95% organic waste and 96.05% inorganic waste, with the economic value of inorganic waste reaching Rp1,559,000 per day. In terms of waste management, two aspects were found to be inconsistent with SNI-19-2454-2002. Six strategies were recommended to improve waste management at Modern Fish Market, with priority actions including the preparation of technical guidelines aligned with SNI-19-2454-2002 and expanding cooperation with recycling industries. Keywords: recycling, organic waste, inorganic waste, SNI-19-2454-2002, Nizam Zachman
Copyright (c) 2025 Retno Muninggar, Hafizh Syah Rifqi, Fis Purwangka, Mhd Rizki Riantoro https://creativecommons.org/licenses/by-nc/4.0
OPTIMIZING JULUNG-JULUNG (Hemiramphus sp.) FISHERY USING SURPLUS PRODUCTION MODELS iN EAST SERAM
The julung-julung (Hemiramphus sp.) fishery in eastern Seram waters is an important livelihood resource for coastal communities, yet it is increasingly exposed to high exploitation pressure driven by intensified fishing and coastal habitat degradation. This study assesses the stock status and identifies optimal management strategies using a surplus production modelling approach. Catch (tons) and fishing effort (number of trips) data from 2014–2024 were analyzed using the Schaefer and Fox models. Model comparison showed that the Fox model provided a better fit to the observed data, with an R² of 76.0%, compared with 73.3% for the Schaefer model. Based on the Fox model, the estimated maximum sustainable yield (MSY) was 945.7 tons per year, with an optimal fishing effort (Eopt) of 2,365 trips per year. The declining trend in catch per unit effort (CPUE), despite continued increases in fishing effort, indicates reduced fishing efficiency and suggests that the stock is already experiencing overfishing. These results demonstrate that the julung-julung fishery in eastern Seram waters is under overexploitation and requires urgent management intervention. Effort regulation aligned with Eopt, together with ecosystem-based and participatory management approaches, is recommended to support recovery and long-term sustainability. The findings provide evidence-based guidance for strengthening policy development and management of small-scale, data-limited tropical fisheries, particularly those facing similar ecological and socioeconomic pressures. Keywords: Hemiramphus sp., MSY, CPUE, Fox model, fisheries management
Copyright (c) 2025 Stany Rachel Siahanenia, Agustinus Tupamahu, Halik Litiloli https://creativecommons.org/licenses/by-nc/4.0
Construction and Effectiveness of Scoop Light Fishing (SLF) in Bero Village, West Muna, Southeast Sulawesi, Indonesia
The Scoop Light Fishing (SLF) gear is an innovative fishing technology capable of producing catches exceeding one ton per trip. Despite its high productivity and ability to operate during all lunar phases, including bright-moon periods, its construction and effective fishing time have not been scientifically assessed. The purpose of this study is to examine the construction of the SLF and identify its effective fishing period in the waters of Bero Village, Pulau Tiga, West Muna Regency. The research employed a survey method, with data collected through direct observation and interviews, and analyzed using qualitative and quantitative approaches. Quantitative analysis included a normality test and a one-way ANOVA at the 0.05 significance level, followed by an LSD post hoc test. The results show that the SLF consists of two main components: an elongated scoop-net bag directly connected to the fish hold and a square lighting system comprising four panels equipped with white and yellow lights, producing a total output of 4,765 watts. The SLF operates effectively during all lunar phases; however, fishing effectiveness is highest during the full moon phase (Q.III), as indicated by a significance value of less than 0.05. Keywords: Effectiveness; moon phases; scoop light fishing
Copyright (c) 2026 Rita L Bubun, Nukhra Haini, Amir Mahmud, Eddy Hamka, Sitti Fadillah, Arif Saputra, Timang Jaya, Rayon Widiono, Indah Ayu Astuti, Erdiah Ramadani Djohansyah, Aswan Wahyudin, Abdul Hamid Usman, Firgiawan Listianto https://creativecommons.org/licenses/by-nc/4.0
Enhancing Fisheries Sustainability Through Supply Chain Efficiency with Business Intelligence (Machine Learning) at Auction Sites
The fisheries industry faces complex challenges in supply chain efficiency that impact sector sustainability and the welfare of fishermen. This study aims to analyze the implementation of machine learning-based business intelligence systems to improve supply chain efficiency at Palang Fish Auction Place (TPI), Tuban Regency. The research method employs a mixed-methods approach, combining qualitative methods through in-depth interviews with fisheries stakeholders with quantitative methods using linear regression models to predict fish catch volumes for the 2022-2024 period. Qualitative data analysis employs the Miles & Huberman framework, which involves data reduction, data presentation, and conclusion drawing. In contrast, quantitative data is evaluated using metrics such as MAE, MAPE, and RMSE. The results reveal five primary factors influencing supply chain efficiency: catch volume with distinct seasonal patterns, auction price stability influenced by demand and import policies, distribution constraints resulting from inefficient payment systems, significant weather and environmental impacts, and the potential for technology adoption with positive acceptance among fishermen. The machine learning model successfully predicts catch volume with increasing accuracy from MAPE 18.5% (2022) to 12.8% (2024). The implementation of machine learning-based business intelligence systems has proven capable of improving fisheries supply chain efficiency, stabilizing fish prices, reducing resource waste, and supporting the sustainability of the fisheries sector in accordance with the Sustainable Development Goals. Keywords: Business intelligence, fish auction place, fisheries, machine learning, supply chain efficiency
Copyright (c) 2026 Dwi Irnawati, Fauzian Noor, Sofie Shalzabila Meta Firanka https://creativecommons.org/licenses/by-nc/4.0
EFFICIENCY OF HANDLINE TUNA FISHERMEN'S WORKING TIME USING THE PERT APPROACH
Handline tuna fishing constitutes one of the key economic activities in coastal areas, particularly for small-scale fishermen. Efficient working time plays a vital role in improving fishermen’s productivity and income. However, in practice, tuna fishing operations frequently encounter inefficiencies in both planning and the execution of daily tasks. Therefore, an analytical method is required to identify and evaluate each stage of the work process systematically. The Program Evaluation and Review Technique (PERT) provide a structured approach to mapping work activities, estimating the time required for each task, and identifying the critical path that determines the total project duration. This study aims to evaluate the efficiency of working time utilization among tuna fishermen using handline gear by applying the PERT approach. The research was conducted on 163 fishing vessels using the PERT (Project Evaluation and Review Technique) method, focusing on the analysis of actual time allocation for each activity. The results indicate that of the 24 analyzed activities, 17 (70.83%) fall within the critical path, while 7 (29.17%) have slack time. Critical activities such as loading supplies, traveling to the fishing ground, and retrieving the parachute anchor determine the project’s minimum duration. Meanwhile, activities with slack time, such as preparing the parachute anchor and mooring the vessel to the fish aggregating device (FAD), can be performed flexibly without affecting the overall project timeline. Effective time management is essential to ensure that each operational phase is completed on schedule, thereby improving the efficiency and productivity of fishing operations. Keywords: critical path, handline, PERT, tuna.
Copyright (c) 2026 Andi Irawan, Ratu Sari Mardiah, Yusrizal, Ani Leilani, Erick Nugraha, Fredi Febriyanto, Edi Miswar https://creativecommons.org/licenses/by-nc/4.0
IMPLEMENTATION THE CODE OF CONDUCT FOR RESPONSIBLE FISHERIES IN PURSE SEINE OPERATIONS AND CATCH HANDLING
The purse seine is one of the primary fishing gears used to land pelagic species at the Nusantara Fishing Port, Prigi. The adoption of environmentally responsible fishing practices is critical to minimizing bycatch, preventing habitat degradation, and preserving pelagic fish stocks. This study assessed the operational performance of small pelagic purse seines and catch-handling practices in relation to the CCRF. Fieldwork was conducted from February to May 2025 using purposive sampling, supported by observations and interviews with purse seine fishermen, including the stages of onboard and landing-site handling. A scoring system was applied to evaluate each indicator, and gap analysis was used to identify deficiencies in the handling system on KM. Sinar Mutiara. A total of 25 fishermen and 25 community respondents were surveyed, yielding an average score (X̅) of 28.78, indicating limited compliance with sustainable fisheries resource management principles. Variation in adherence to CCRF handling standards further reinforces this finding. While post-harvest handling at the auction site showed relatively better alignment with CCRF provisions, notable gaps remain in onboard and landing-site operations. These results underscore the need for targeted improvements to enhance compliance and support the transition toward more sustainable purse seine fisheries in Prigi. Keywords: CCRF, handling of ctach, Prigi fishing port, purse seine
Copyright (c) 2025 Iya Purnama Sari, Yulia Estmirar Tanjov, Muhammad Yusuf Affandi https://creativecommons.org/licenses/by-nc/4.0
TECHNICAL EFFICIENCY AND PRODUCTION SCALE ANALYSIS IN SMALL-SCALE TUNA HANDLINE FISHERIES IN WEST SULAWESI
Tuna fishing activity in West Sulawesi has intensified in recent years, raising concerns regarding the sustainability of the fishery in the Makassar Strait amid increasing fishing pressure. This study evaluates the capacity utilization and resource use efficiency of small-scale handline vessels by measuring their technical and scale efficiency. A total of 78 tuna handline vessels were analyzed using an output-oriented Data Envelopment Analysis (DEA) model under Variable Returns to Scale (VRS), covering two vessel categories: <5 GT and 5–10 GT. Vessel samples were selected through stratified random sampling from the Banggae and Tinambung sub-districts. The results show that vessels in the 5–10 GT category exhibit higher technical efficiency in utilizing production inputs and fishing capacity, while vessels smaller than 5 GT tend to operate closer to the optimal scale, with most exhibiting increasing returns to scale (IRS). These findings highlight that efficiency improvements in the small-scale segment could be achieved through targeted technological assistance and training, particularly among smaller vessels (<5 GT), while capacity management remains essential in larger vessels (5–10 GT) to prevent excessive fishing effort. Integrating efficiency-based management insights with Indonesia’s Measured Catch Policy is critical to support the sustainability of tuna fisheries in the region. Keywords: DEA, scale efficiency, small-scale fisheries, tuna fishing, technical efficiency
Copyright (c) 2026 Muh Aldhy Hatmar, Alfa Nelwan https://creativecommons.org/licenses/by-nc/4.0
EXPLORING GLOBAL TRENDS AND FUTURE PROSPECTS IN FISHING TECHNOLOGY RESEARCH: AN INNOVATIVE BIBLIOMETRIC APPROACH
Fishing technology has undergone rapid development in response to sustainability challenges; however, a comprehensive global synthesis of its research progress and future directions remains lacking. To address this gap, this study explores global trends and prospects in fishing technology research using an innovative bibliometric approach. A total of 164 Scopus-indexed documents published between 2009 and 2023, authored by 179 researchers across 33 countries, were analyzed. Bibliometric analysis was conducted using the Biblioshiny application in the Bibliometrix R package, complemented by knowledge domain visualization (KDV) to map scientific structures, collaboration networks, and citation patterns. The results indicate an annual publication growth rate of 12.3%, reflecting increasing global interest in fishing technology. China was identified as the most productive country, with the strongest record of international collaboration, while Cooke SJ emerged as the most influential scholar, with a PageRank score of 0.0204 and accounting for 18.25% of global citations. Keyword mapping revealed research hotspots centered on sustainable development, selective fishing gear, and the integration of digital technologies, including artificial intelligence and electronic monitoring. This study concludes that bibliometric synthesis not only provides a strategic overview of global knowledge gaps and thematic evolution but also highlights the critical role of interdisciplinary collaboration and technological innovation in shaping the future of sustainable fisheries management. Keywords: Bibliometrics analysis, fisheries, fishing technology
Copyright (c) 2025 Riska Fatmawati, Romie Jhonnerie, Andri Hendrizal, Desi Rahmadani Siagian https://creativecommons.org/licenses/by-nc/4.0
STAKEHOLDER PERSPECTIVES ON MANAGING ABANDONED, LOST, OR DISCARDED FISHING GEAR IN REMBANG CRAB FISHERIES
Abandoned, lost, or discarded fishing gear (ALDFG) poses a significant threat to natural marine habitats, causing damage to aquatic ecosystems and affecting fishing productivity. In this study, the Analytic Hierarchy Process (AHP) method was employed, and interviews were conducted with stakeholders to identify strategies for preventing the occurrence of ALDFG in crab fisheries in Rembang waters. The results indicate that the highest-priority criteria, as identified by stakeholders, include: marine debris: plastic bags; fishing gear waste: fishing traps; cause: entanglement with other fishing gear; impact: decreased income; solution: prohibition of modified purse seines; and actor: central government. These were considered the most significant by stakeholders. In contrast, the lowest-priority criteria were marine debris: sacks; fishing gear waste: nets or flags; cause: physical damage (cuts); impact: anxiety; solution: establishment of an oversight committee; and actor: business entities. It is hoped that these findings will offer stakeholders new insights and perspectives, which will accelerate the process of integrating diverse public opinions to develop more effective approaches to handle ALDFG. Keywords: Analytic Hierarchical Process, Abandoned, lost, or discarded fishing gear, Crab fisheries
Copyright (c) 2025 Sofiyan Muji Permana, Maharani Yulisti, Mohamad Natsir, Mahiswara, Baihaqi, Helman Nur Yusuf, Suryanto, Regi Fiji Anggawangsa, Iqnatius Tri Hagiyatno, Aris Budiarto, Irfan Yulianto, Budy Wiryawan
DESIGN AND IMPLEMENTATION OF PIEZOELECTRIC TRANSDUCER TO IMPROVE FISHING EFFICIENCY ON BAGAN BOAT
The decline in fish catches among bagan boats in Labuhan Jambu, Sumbawa District, is caused by overfishing, illegal fishing, and climate change. To address this issue, technological innovations such as sonar systems that emit acoustic signals to attract fish are necessary. This study aims to design piezoelectric transducers and transmitter drivers capable of emitting acoustic frequencies that effectively attract fish around bagan boats, thereby increasing catch yields. The methodology included system design, fabrication, and testing. The developed transducer operates across a frequency range of 1–75 kHz, and field tests were carried out by installing the transducer beneath the bagan boat. Results indicated that fish responded quickly to frequencies between 500–800 Hz, as evidenced by the appearance of bubbles on the water surface, suggesting fish presence. The main species caught included pelagic fish, skipjack, and squid. Fish catches increased by approximately 2–3 times compared to conventional methods. The transducer and transmitter driver using piezoelectric materials were successfully developed and functioned effectively. The final prototype was capable of emitting acoustic frequencies from 1 Hz to 100 kHz. This innovation demonstrates the potential of piezoelectric transducer technology to significantly enhance fish catches in bagan boat operations in Labuhan Jambu. Keywords: Driver transmitter, bagan boat, piezoelectric, transducer
Copyright (c) 2025 Muhammad Ilham, Henry M. Manik, Ayi Rahmat
USE OF BLUE LED LIGHTS AS AN ATTRACTANT IN A COLLAPSIBLE POT ON BLUE SWIMMING CRAB CATCHES
Blue light-emitting diode (LED) lights have been tested as a potential tool in a blue swimming crab collapsible pot at the laboratory level. However, field-scale trials have not yet been conducted to confirm their effects on pot catches. This study aims to determine the effects of blue LEDs on catch composition and the effectiveness of catching the main target of crab (Portunus pelagicus). A fishing trial was conducted in Brondong, Lamongan waters to examine the influence of blue LED lights on crab catches. A total of 54 pots were deployed, consisting of 18 pots with fish bait (U) as control, 18 pots with blue LED light (L), and 18 pots with a combination of fish bait and blue LED (LU). The results showed that the LU treatment yielded the highest number of species, with a total of 13 species, followed by the U treatment, with 10 species, and the L treatment, with 9 species. The LU treatment had the highest catch of 48 fish (3,718 g), followed by U with 43 fish (3,448 g) and L with 5 fish (208 g). Statistical analysis revealed no significant differences between the LU and U (control) treatments in terms of both catch number and weight. The highest catchable width distribution in treatment U was 88%, while the highest catchable weight distribution in treatment LU was 75%. The analysis of crab-catching effectiveness analysis showed that the LU treatment had the highest average effectiveness of 13%, followed by the U treatment at 11%, and the lowest was the L treatment at 1%. In conclusion, LED lights do not affect the catch, however, adding LED lights to the bait can increase the number of species caught, the number of individuals, the weight of the catch, and the effectiveness of catching kingfish (P. pelagicus). Keywords: Blue light, catchable distribution, effectiveness, bait
Copyright (c) 2025 Bagus Prasetyo Aji, Wazir Mawardi, Fuad Fuad, Mochammad Riyanto
THE IMPLEMENTATION STRATEGY OF THE SUSTAINABLE FISHING PORT CONCEPT AT CILACAP OCEAN FISHING PORT
The ecoport concept, or environmentally port management, is a sustainable development approach that integrates social, economic, and environmental aspects. This concept has been adopted in several developed and developing countries. In Indonesia, the ecoport concept has been applied to fishing ports, known as eco-fishing ports since 2013. However, the Cilacap Ocean Fishing Port (PPS Cilacap) was not selected as a pilot site that year, despite having adequate infrastructure and active fishing operations that meet the assessment parameters outlined in the National Fishing Port Master Plan. This study aims to identify the strengths, weaknesses, opportunities, and threats (SWOT) related to environmental management and the socio-economic conditions of the local community, in order to formulate strategies for implementing a sustainable eco-fishing port at PPS Cilacap. Strategy development was carried out using a SWOT analysis based on observations, interviews, and questionnaire surveys. The results indicate that PPS Cilacap possesses strengths such as good environmental conditions and competent human resources, but it also faces challenges, including poorly maintained facilities, waste management issues, and limited financial resources. In conclusion, although PPS Cilacap demonstrates favorable environmental conditions and skilled personnel, improvements in maintenance, waste handling, and budget allocation are needed. Enhancing infrastructure, fostering partnerships, and advancing sustainability initiatives will be crucial to the successful implementation of the eco-fishing port concept. Keywords: Cilacap Ocean Fishing Port, eco fishing port, opportunities, strengths, threats, weaknesses
Copyright (c) 2025 Dimas Andriyanto, Evi Frimawaty, Boma Kresning
ESTIMATING SUSTAINABLE EFFORT RATES FOR SKIPJACK TUNA FISHERIES LANDED AT YOGYAKARTA’S COASTAL FISHING PORT USING THE FOX MODEL
This study aims to estimate the fishing effort for skipjack tuna (Katsuwonus pelamis) landed at Sadeng Coastal Fishing Port, Yogyakarta, under three management conditions: Maximum Sustainable Yield (MSY), Maximum Economic Yield (MEY), and Open Access Equilibrium (OAE), using the Fox model. The Fox model includes a key variable that helps balance ecological sustainability with economic profitability, ensuring the long-term viability of both the fishery and the livelihoods it supports. The skipjack tuna assessed in this study were caught using purse seines in the Indian Ocean south of Yogyakarta. Catch and fishing trip data from 2015 to 2021 were analyzed using the Fox bioeconomic model, a development of the Gordon-Schaefer model. The research was conducted from March to May 2022. Under MSY conditions, the estimated catch (CMSY) was 493,012 kg with an effort (EMSY) of 170 trips per year, yielding an annual profit of IDR 4,768,675,442. Under MEY conditions, the estimated catch (CMEY) was 474,424 kg with an effort (EMEY) of 127 trips, resulting in a higher annual profit of IDR 5,071,245,038. Under OAE conditions, the estimated catch (COAE) was 337,761 kg with an effort (EOAE) of 363 trips per year. Based on the Fox model, the current fishing effort is at 70% of EMSY, indicating that the skipjack tuna fishery in this area is not overfished. Keywords: Bioeconomic, EMSY, purse seine,Sadeng, Indian Ocean
Copyright (c) 2025 Suharyanto, Mustaruddin Mustaruddin, Sayuri Mantani, Eli Nurlela, Sinatria Barokah
IDENTIFICATION OF ACTORS AND MARKETING MARGINS OF PROTECTED FRESHWATER STINGRAYS IN MUSI RIVER, SOUTH SUMATERA
The Musi River in Palembang, South Sumatra-Indonesia, serves as the habitat for three protected freshwater stingray species: the marbled whipray (Fluvitrygon oxyrhynchus), the white-edge whipray (Fluvitrygon signifier), and the giant freshwater whipray (Urogymnus polylepis). All three species are categorized as endangered on the IUCN Red List and are listed under Appendix II of CITES. However, communities along the Musi River continue to trade freshwater stingrays freely in local markets. This research aims to identify the economic potential of the freshwater stingray trade, which is suspected to drive illegal capture, by analyzing its supply chain and estimating its marketing margins. Descriptive analysis and marketing margin analysis were employed to address the research objectives. The findings indicate that the freshwater stingray trade in the Musi River involves a short supply chain and covers a wide range of capture areas. Positive marketing margins ranging from IDR 17,000 to IDR 60,000 per kilogram for the white-edge whipray and the giant freshwater whipray, and up to IDR 200,000 per individual for the marbled whipray, provide empirical evidence that freshwater stingrays contribute to the income of the market actors, thereby potentially encouraging the trade of protected species and potentially driving illegal trade. Keywords: Conservation, illegal trade, ornamental fish, protected species, wildlife trafficking
Copyright (c) 2025 Sahaya Aulia Azzahra, Pini Wijayanti, Nabila Nur Septiani, Lailatun Nikmah
DAILY OCCURRENCE OF WHALE SHARKS (Rhincodon typus) AND MIGRATION OF NEW INDIVIDUALS IN THE WATERS OF KWATISORE
The waters of Kwatisore are recognized as a consistent aggregation site for whale sharks (Rhincodon typus) throughout the year, with an increasing number of individuals observed. Understanding individual occurrence patterns is essential for monitoring population dynamics and conservation planning. This study aimed to analyze the daily occurrence of whale sharks based on individual identification and assess the entry of new individuals into the Kwatisore waters. Data collection was conducted from November 2023 to January 2024. A total of 27 male individuals were recorded, with a cumulative 592 sightings. Body lengths ranged from 2.5 to 5 meters, dominated by individuals approximately 3.5 meters in length. Spatial distribution of daily occurrences followed the positioning of anchored lift-net fishing gear (bagan), while temporal distribution showed a higher occurrence during morning hours. In 2023, 13 new individuals were recorded entering the area. The daily appearances were dominated by juvenile-sized individuals, and sighting frequency varied among individuals. Spatial and temporal patterns were strongly influenced by anchovy (Stolephorus spp.) catches from the bagan gear, while the entry of new individuals contributed to the growing aggregation of whale sharks in the Kwatisore waters. Keywords: whale sharks, daily occurrence, new individual migration
Copyright (c) 2025 Yan Maruanaya, Manuel Mirino, Sumaryono
KOMPARASI PARAMETER TEKNIS PENANGKAPAN IKAN PADA KAPAL HIBAH KEMENTERIAN KELAUTAN DAN PERIKANAN (KKP) DI KABUPATEN SUKABUMI
Kementerian Kelautan dan Perikanan (KKP) menggulirkan salah satu dari program yaitu hibah kapal bagi nelayan di Kabupaten Sukabumi yang tergabung dalam Kelompok Usaha Bersama (KUB). Pemanfaatan kapah hibah yang berbasis di Kabupaten Sukabumi diharapkan mampu meningkatkan hasil tangkapan nelayan. Oleh karena itu, riset ini bertujuan untuk menilai tingkat pemanfaatan penggunaan kapal hibah yang berbasis di Kabupaten Sukabumi. Riset ini dilakukan pada bulan Agustus 2019 sampai Januari 2020. Metode yang digunakan yaitu metode survey. Data dianalisis secara deskriptif komparatif. Hasil riset menunjukan bahwa kapal hibah dinilai optimal dan dimanfaatkan dengan baik oleh nelayan Kabupaten Sukabumi dengan menggunakan alat tangkap jaring rampus dan pancing ulur. Aktivitas kapal hibah mampu menyamai dengan kegiatan kapal yang berbasis di Kabupaten Sukabumi.
ENGINEERING PORTABLE UNDERWATER LAMP AS AN AUXILIARY GEAR FOR PURSE SEINE
Lights are common supporting tool in purse seine fishing in Indonesia. Currently, lamps on purse seines use mercury and metal halide (MH) which require very high electrical power. Therefore, there is a need for an effective underwater light technology alternative with low electric power. The aim of this research is to design a portable underwater lamp (PUL) which can be controlled remotely to support fishing operations. The design engineering process in creating the PUL includes light and buoy construction, temperature testing, light distribution, waterproofing, and motion testing. The results show that the PUL design enables the tools to be controlled remotely. The average temperature of the lamp on the PUL is 40 ⁰C, this temperature is lower than the MH lamp which reaches 250 ⁰C. The light spreads evenly at an angle of 360⁰ to the horizontal and 180° to the vertical. Meanwhile, the results of the lamp motion test showed that the lamp was watertight and highly stable. Keywords: Light emitting diode, Remote control, Waterproof, Electric Power.
ANALISIS TINGKAT KESESUAIAN DAN KESENJANGAN PENERAPAN TRACEABILITY PERIKANAN TUNA SIRIP KUNING DI SIBOLGA
The need for fishery products that are healthy, safe, legal, sustainable, and democratic from time to time continues to increase. This makes the export destination country require a certificate issued by an institution. One of the standards used by such countries is the MSC ecolabel. MSC ecolabel is an endorsement of a product that meets the criteria of environmental sustainability procedures and hasbeen well managed. Ecolabel identifies fisheries governance properly based on established criteria, relating to the utilization of fishery resources and marine ecosystems. Therefore, it is necessary to conduct an assessment related to the application of MSC ecolabels in the Sibolga tuna processing industry. The purpose of this study is to analyze the level of gap (gap analysis) and the suitability of the application of the MSC ecolabel and examine various inhibiting factors. This research was conducted using survey methods and Focus Group Discussion (FGD) with industry and Sibolga Archipelago Fishing Port. The analysis used was qualitative descriptive analysis, gap analysis, and conformity level analysis. The results showed that the level of conformity in the MSC CoC of 5 (five) criteria, only 1 criterion was in accordance with the standard, while the other four had not, with the level of conformity being 63.75%, 83.25%, 66.75, and 57.25%. The results of the assessment of the inhibiting factors were obtained from fishermen, processing industries, and government support. Keywords: MSC CoC, Sibolga, traceability, yellow fin tuna.
KOMPOSISI JENIS DAN LAJU TANGKAP PUKAT DASAR (ARAD) DI PERAIRAN CIREBON
Pemanfaatan sumberdaya udang di perairan Cirebon masih menggunakan pukat dasar (arad) sebagai alat penangkap, walaupun sebagian dengan trammelnet. Namun penangkapan dengan pukat dasar dianggap lebih dominan menangkap sumberdaya ikan dibandingkan udang sebagai hasil tangkapan utama. Kajian dilakukan selama Januari sampai dengan Nopember 2021 dengan mendata produksi dan jenis tangkapan pukat dasar nelayan pukat dasar di Kecamatan Suraneggala, Kabupaten Cirebon. Hasil kajian menunjukkan bahwa pukat dasar menggunakan kapal kayu dengan bobot < 5 GT dan one day fishing serta termasuk pada klasifikasi pukat hela dasar berpapan. Hasil tangkapan 80,83% adalah ikan campur, sedangkan udang < 5% dari total produksi. Produksi hasil tangkapan berkisar antara 4.000 – 16. 700 kg dengan jumlah effort sebesar 20 – 140 tip dan laju tangkap rata-rata 199,4 kg/ trip. Berdasarkan hasil kajian perlu dilakukan upaya pengelolaan dalam operasional penangkapan dengan alat ini untuk efektivitas produksi.
COMPOSITION, LENGTH-WEIGHT RELATIONSHIP, AND FISHING GROUND OF SHARKS LANDED AT PPS CILACAP, CENTRAL JAVA
This study was conducted to analyze the catches of sharks, such as composition, length-weight relationship, and to determine the distribution of shark fishing areas. Every fishing activity has by-catch issues. Fishers commonly catch sharks as by-catch. These fishing activities will harm the shark ecosystem in the waters. This research was conducted in March – May 2021 at PPS Cilacap. The results of this study showed that A. superciliosus (paitan shark) was a common catches and its total catch was 1,820 kg. The next common catch was Carcharhinus falciformis and the total catch was 723 kg. The lowest catch was the Carcharhinus sorrah shark (sorrah shark) and its total catch was 16 kg. The growth of Carcharhinus falciformis was negative allometric because b-value <3. Meanwhile, the growth of A. superciliosus is positive allometric because b-value was > 3. Length-weight relationship of Carcharhinus falciformis and A. superciliosus was isometric, which means that the growth between length and weight is balanced. Shark fishing areas are located at coordinates 8º - 15º South and 100º - 111º East. The area of shark fishing is at coordinates 8º - 10º South and 108º - 110º East. Keywords: Composition, Length-Weight Relationship
Copyright (c) 2024 Yaser Krisnafi, Dian Novianto, Syam Baharuddin Sahid , Ratih Purnama Sari
EFFECTIVENESS OF THE OIL TO GAS FUEL CONVERSION PROGRAM FOR FISHERMEN IN PALEMBANG CITY
The Oil to Gas Fuel Conversion Program aims to make it easier for fishermen to obtain fuel at affordable prices, hence they can increase their income. Program implementation is declared effective if it runs smoothly and produces the expected results. This research aims to analyze the effectiveness of the program, analyze the income of program recipients and non-program recipients, and analyze the relationship between program effectiveness and income. Interviews using questionnaires were conducted with research subjects, namely 51 members of the Joint Business Group who received the program and 30 members who did not receive the program. Data in the form of attitudes or opinions of program recipient respondents are analyzed based on the achievement of effectiveness scores, income data from two groups of respondents were analyzed based on the difference between two means tests, and the relationship between effectiveness and income was analyzed based on the Spearman rank correlation test. The research results showed that the program's effectiveness was 94.20% (very high). The t-count value of 4.816 is greater than the t-table of 1.994, indicating that there is a significant difference between the income of program recipients and non-program recipients. The relationship between program effectiveness and income is very weak and not significant, with a coefficient value of 0.032. The effectiveness of the program does not directly affect income, but the existence of the program increases fishing efforts and the income of program recipients. Keywords: Conversion; effectiveness; fishermen; gas fuel; Spearman Rank Correlation Test
Copyright (c) 2024 Shelia Shelia, Sriati Sriati, Gatot Priyanto, Indah Widiastuti, Armina Fariani
THE SELECTIVITY OF FISH TRAP ESCAPE GAP SIZE ON BOTANA FISH (Acanthurus reversus)
Fish trap is used due to its good prospect, particularly for demersal fish and reef fish in Maluku. A challenge of trap fisheries is the capture of various species of fish, along with a narrow size variation in the captured fish. To reduce the species diversity in the catch and allow the escape of young fish, an escape gap is recommended. This study aims to analyze the effect of different escape gap sizes on the fish that escape and their chances of being caught or escaping relative to the dominant catch. The study was conducted from July to September 2021 in the waters of Eri Village, Nusaniwe District, Ambon City, Indonesia. The experimental fishing method was used in the field. The results indicated that the size of the escape gap had no effect on the number of fish that escaped through each escape gap. The 50% probability of Achanturus reversus escaping from the size 2.0 cm escape gap is in the total length range of 21-22 cm, while from a 3.0 cm escape gap is 24-25 cm. Keywords: Fish pot, escape gap, selectivity
Copyright (c) 2024 Agustinus Tupamahu, Kedswin Hehanussa, Haruna Haruna
TUNA FISHERIES IN NORTH SULAWESI: PORTRAIT OF FRESH TUNA DIRECT EXPORT
The North Sulawesi Regional Government implemented a policy breakthrough to enhance the competitiveness of tuna fisheries by facilitating the direct export of fresh tuna from Manado to Japan. However, export operations have not run optimally, as the cargo quota of 20 tons per trip per week has not been achieved which threatens the continuation of the operation. This study aims to describe the current state of direct export of tuna to Japan and to identify the causes of the failure to meet the cargo quota target for direct export of fresh tuna to Japan. The data used in this study were obtained through in-depth interviews with respondents selected using purposive and accidental sampling, as well as direct observation at the research location. The data were processed qualitatively and quantitatively, and then analyzed descriptively. The results of the study revealed a reduction in the export quota from 20 tons per trip per week to 3 tons per trip per week. In 2023, the export reached the average delivery target was only met in three months: March, April, and December, with 3.35 tons, 3.04 tons, and 7.34 tons, respectively. The cause of the issue is the shortage of high-quality tuna raw materials (grade A), which results from fishermen failing to implement proper fish handling methods during fishing operations. Furthermore, the dependence on tuna supplies from PPS Bitung. The solution is to enhance the ability of fishermen according to good fish-handling standards and to diversify the supply chain of fresh tuna by sourcing from both within and outside the North Sulawesi region. Keywords: direct export, fresh tuna, North Sulawesi
Copyright (c) 2024 Ronald S A Posundu, Tri Wiji Nurani, Mulyono S Baskoro, Iin Solihin, Mustaruddin Mustaruddin
BIOECONOMIC ANALYSIS OF RED SNAPPER (Lutjanus sp.) RESOURCES AT REMBANG REGENCY
Rembang Regency has quite large fishery potential in 2021, reaching 87,292.9 tonnes in Central Java. One of the catches with high economic value is red snapper (Lutjanus sp.). Red Snapper is a demersal fish obtained from the operation of Danish seine. The purpose of this study was to analyze the condition of red snapper resources in Rembang Regency using the bioeconomic approach of the Gordon-Schaefer model and to analyze the level of utilization and exploitation of red snapper (Lutjanus sp.) in Rembang Regency. The research used a descriptive method with a purposive sampling method to collect a sample of 90 respondents who owned Danish Seine gear at Tasikagung Fishing Port. The results of data processing obtained Maximum Sustainable Yield (MSY) with a CMSY value of 2,002 tons/year, EMSY of 8,857 trips/year. The Maximum Economic Yield (MEY) calculation obtained a CMEY value of 1,936 tons/year, EMEY of 7,241 trips/year, and optimal profit of IDR 74,773,571,716 and the calculation of the Open Access Equilibrium (OAE) where a COAE value of 1,194 tonnes/year is obtained, an EOAE of 14,483 trips/year. The permissible utilization rate of red snapper (Lutjanus sp.) in Rembang Regency is 3,670,532 kg/year. In the last 9 years, an average resource utilization rate of 45% was obtained and an average effort level of 158%. This level of effort has exceeded the fishing limit, so it is necessary to reduce or limit fishing efforts. Keywords: MSY; MEY; Rembang Regency; Red Snapper; Gordon Schaefer
Copyright (c) 2024 Meri Handayani, Aristi Dian Purnama Fitri, Dian Wijayanto
CATCH COMPOSITION AND CATCHABLE SIZE OF LOBSTERS (Panulirus spp) IN LEBAK BANTEN WATERS, INDONESIA
Information on the catch composition and catchable size of lobsters in Lebak waters remains limited, posing challenges for effective fisheries management. This study aims to assess the technical performance of the lobster fishery and analyse catch composition. Data on technical performance were collected through interviews with fishers and lobster collectors using random sampling, while a census approach was applied to measure carapace length and weight for 589 lobsters. A descriptive quantitative analysis was conducted to evaluate the length-weight relationship of lobsters. The findings indicate that fishers predominantly use polyamide monofilament gillnets with a mesh size of 3.5–4.0 inches, operating traditional outrigger boats of 2–3 GT and 7 GT for single-day fishing trips in Lebak waters. Panulirus homarus was the dominant species in the catch. The sex ratio of lobsters was imbalanced, and their growth pattern exhibited negative allometry (b < 3). An assessment of catch sizes against the standards set by PERMEN-KP No. 16/2022 revealed a high proportion of undersized lobsters in the Binuangeun Estuary, including P. penicillatus (78–83%), P. homarus (80–100%), P. ornatus (23%), P. longipes (90–100%), and P. versicolor (65–100%). Similarly, in the Cibareno Estuary, the percentages of undersized lobsters were P. penicillatus (84–100%), P. homarus (98%), P. ornatus (0%), P. longipes (100%), and P. versicolor (92%). These findings highlight the need for stricter management measures to ensure sustainable lobster fisheries in the region. Keywords: catchable, Lebak Banten waters, length weight, lobster, sex ratio
Copyright (c) 2024 Ndaru Narulita Sani, Ari Purbayanto, Ronny Irawan Wahju
ECONOMIC STUDY OF BLUE SWIMMING CRAB FISHING ACTIVITIES IN JAVA SEA USING ELECTRIC AND SAILING BOAT DESIGN
The United Nations has proclaimed the world's commitment to reducing greenhouse gas emissions in the Paris Agreement, and Indonesia has a net zero emissions target by 2060. One of the efforts to support this commitment is by applying environmentally friendly fishing vessel technology using sail and electric propulsion. However, to convince the application, it is necessary to consider several aspects, especially the economic aspect of business investment. This study aims to calculate the estimated cost of boatbuilding and fishing operations for 10 days in the Java Sea using the development of electric sailboat design. The payback period of a feasible investment is then calculated by comparing the revenue from Blue Swimming Crab (BSC) fishing activities. Based on the result, recognizing that with an investment value of nearly 400 thousand USD to purchase the boat, it is reasonable to set a minimum goal of capturing at least 1,2 Ton of crabs per trip, and a minimum of 20 trips annually, thus the payback period takes 10 years. Keywords: Blue swimming crab, Fishing vessel, Java Sea, Net zero emission, Payback period.
Copyright (c) 2024 Nanang Setiyobudi, Agoes Santoso, Dian Purnamasari, Teguh Muttaqie, Muryadin Muryadin, Fariz Noor, Ari Setiawan, Cakra Wijaya Kusuma Rahadi, Achmad Baidowi, Rifki Rezvani, Zarochman Zarochman
SUITABILITY OF SPATIAL-TEMPORAL HABITAT OF YELLOWFIN TUNA (Thunnus albacares) USING MAXIMUM ENTROPY MODEL IN WEST SUMATRA
Yellowfin tuna is one of the main catches in West Sumatera waters and has a high economic value. Fishing optimization can be improved through spatial and temporal predictions of fishing areas for effective fisheries management. This research aims to predict fishing areas using an oceanographic data approach through maximum entropy (MaxEnt) modelling. Data collection incorporating sea surface temperature and chlorophyll-a were obtained from the Aqua-Modis satellite in 2022 as well as fishing point data from Ocean Fishing Port (OFP) Bungus. The MaxEnt model shows a good level of accuracy in the West season (AUC 0,860), 1st Transitional season (AUC 0,918), East season (AUC 0,918), and 2nd Transitional season (0,920) The contribution of chlorophyll for one year is more significant, accounted for 75,3%, compared to sea surface temperature, constituted 24,7%. The Sea Surface Temperature (SST) values in West Sumatera waters vary on each season, ranging from 26,4 to 34.5 ℃ and the chlorophyll-a fluctuate between 0,03 and 5,45 mg/m3. The distribution of yellowfin tuna habitat on the map shows that most fishing vessel coordinates are in the Habitat Suitability Index (HSI) HSI value of 0,6 – 0,9. Potential areas for catching yellowfin tuna are around the Mentawai Islands. Keywords: Chlorophyll-a, HSI, Maximum Entropy Model, Sea Surface Temperature, Yellowfin Tuna
Copyright (c) 2024 Septy Heltria, Noferdiman, Ester Restiana Endang G, Farhan Ramdhani, Amir Yarkhasy Yuliardi
FRESHWATER STINGRAY FISHERMEN’S INCOME IN MUSI RIVER, PALEMBANG CITY, SOUTH SUMATRA
Freshwater stingrays are one of the catches targeted by fishers in the Musi River of Palembang City. However, freshwater stingrays are listed as endangered species by the IUCN, and Indonesian government regulates their preservation. Prohibiting the capture of freshwater stingrays can have significant impact on the livelihoods of fishers around the river. This research was designed to analyze fishers’ income and identify the contribution of freshwater stingray catches toward fishers’ income. According to income analysis, the results show that the average fishers’ income is around IDR 269,542.13 - 655,287.47 per trip per day with an R/C ratio to the total cost is 3.78 in the regular season and 2.14 in the low season. The share of freshwater stingray catches toward the total income ranges from 14.22% to 20.93%. Keywords: elasmobranch, livelihood, profit sharing, sustainable fisheries
Copyright (c) 2024 Nabila Nur Septiani, Pini Wijayanti, Sahaya Aulia Azzahra, Lailatun Nikmah, Kastana Sapanli
POLA ANTREAN KAPAL PENANGKAPAN IKAN DI PELABUHAN PERIKANAN KARANGSONG, KABUPATEN INDRAMAYU
A catch unloading is a fishing vessel activity carried out regularly at the port. The high frequency of unloading activities leads to a long queue which requires fishing vessels to wait in significant time for their unloading turn. One of the fishing ports with a significant waiting time is Karangsong Port, where the unloading queue can reach three weeks. To reduce the waiting time, there is a need to identify the utilization level of unloading facilities and queue patterns, as well as calculate unloading time and its influencing factors at Karangsong fishing port. This case study was focused on vessel queuing patterns, utilization of port facilities and the length of unloading time. Data were collected through direct interviews and observations. Based on the calculation results, the utilization rate of the unloading dock is 20.16%, TPI is 36.63% and the port basin reaches 577.86%. The vessels queue in double lines with a single service facility. The average length of unloading time for >30 GT vessels is 2.60 hours while for ≤30 GT vessels is 11.92% faster which is recorded at 2.29 hours. Factors affecting the length of unloading time incorporate the vessel's size, crew size, number of catches, availability of scales, market demand as well as the vessel's position and number of vessels in the queue. Keywords : Queue, fish unloading, port facilities
Copyright (c) 2024 Raistsa Rabbaanii Sunda Rukmana, Izza Mahdiana Apriliani, Pringgo Kusuma Dwi Noor Yadi Putra, Lantun Paradhita Dewanti