Jurnal Pengelolaan Perikanan Tropis (Journal of Tropical Fisheries Management)
Journal of Tropical Fisheries Management (JPPT) is a scientific journal that is published electronically and in print related to research results, and scientific proposals on biodiversity, fisheries biology, fish stock studies, fisheries policies, ecosystem-based fisheries management, fishing technology, fishery product utilization, trade fish, fisheries management area planning, and local wisdom in tropical fisheries management to realize sustainable fisheries resources. 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Departement of Aquatic Resources Management, Faculty of Fisheries and Marine Sciences, IPB University
After the article is submitted and published in this journal, it is fully copyrighted by the Journal of Tropical Fisheries Management. If excerpts from other copyrighted works are included, authors must obtain written permission from the copyright owner and give credit to the source in the article. Then, authors or reader is allowed to copy, share, and redistribute articles/material in any form. But it must still include the appropriate source and credit because the article in this journal is licensed by Creative Commons Attribution 4.0 International License (CC BY 4.0).
PRODUCTIVITY OF PURSE SEINE FISHING GEAR AT PPP LABUAN, PANDEGLANG REGENCY
This research intends to assess the productivity rate of the Purse Seine fishing method at the Coastal Fishing Port (PPP) Labuan in Pandeglang Regency and to develop sustainable management approaches. A quantitative descriptive approach was used to evaluate productivity through indicators like Catch Per Unit Effort (CPUE) and Maximum Sustainable Yield (MSY). Data were obtained through observations in the field, interviews with fishermen, and recording of catches in February 2024 by the marine and fisheries office in Labuan. The results showed a decrease in CPUE from 219.11 kg/trip. The CPUE results show that Purse Seine productivity in Labuan can be said to be good, but if it continues to be left unchecked it will result in a significant decrease in certain species such as tuna and squid obtained from data released from the Labuan marine and fisheries office. Therefore, there must be steps to prevent fluctuations in the Labuan fishing sector by applying an ecosystem-based approach (EAFM) to maintain the sustainability of the marine ecosystem in the Sunda Strait.
Purse Seine, Produktivitas, CPUE, MSY, PPP Labuan
Copyright (c) 2026 Jurnal Pengelolaan Perikanan Tropis (Journal of Tropical Fisheries Management) https://creativecommons.org/licenses/by-sa/4.0
Habitat and Population Structure of Lobster from Southern of West Java
Losbter is a an important and highly economical resources on Coastal Area, in Indian Ocean, including southern part of Java. The research on there area in Pamengpeuk (Garut), South Cianjur, Ujung Genteng conducting to evaluate of habitat and distribution, water quality and population structure. The research result shown the lobster larvae dominant on coastal and near beach, and adult lobster on deeper zone than larvae, and water quality relatively good. The species dominant found are Panulirus homarus and Panulirus pennicilatus) with composition 48%:52%. The size structure in Ujung Genteng relatively growth rapidly than Cianjur and Pamengpeuk. The finding of lobster research in this area are environmental quality appropriate where P homarus and penniculatus as dominat species, with good growth rate.
Indian Ocean, Environmental Status, Distribution, Composisi and Growth
Copyright (c) 2024 Jurnal Pengeloaan Perikanan Tropis (Journal of Tropical Fisheries Management)
Reproductive Biology Status Reproductive Biology Status of Moonfish (Mene maculata) in Palabuhanratu Bay during West Monsoon
The moonfish (Mene maculata) is a demersal fish with important ecological and economic value. The high use of pitcher fish as food fish has the potential to disrupt reproductive patterns, recruitment and stock availability of pitcher fish resources, for which information on reproductive biology is minimal during the west monsoon. This research aims to analyze the reproductive biology status of moonfish in Palabuhanratu Bay. The research period took place from September 2021 to February 2022 (representing the west monsoon), with a sample of 522 fish. Fish samples were taken using a simple random sampling method at Palabuhanratu Nusantara fishing port. The data was analysis to obtain the sex ratio, allometric growth pattern, spawning season, the reproductive potential, and the size at maturity. Results shown that the sex ratio was 1:0.76, which is dominated by male fish. Moonfish have a negative allometric growth pattern. The peak of spawning season during the study period was in September and October. Reproductive potential ranges from 11,988 to 21,164 eggs. The spawning pattern of moonfish is indicated as total spawner. The result of Spearman-Karber method analysis showed that the size of the first maturity of female and male moonfish (Lm50) was 143 mm and 150.5 mm TL, respectively. So, female moonfish mature gonads earlier than male fish.
Moonfish, Palabuhanratu Bay, reproductive potential, Spawning season
Bibliometric Analysis of Funding Aspect in the Domain of Marine Protected Area
This paper conducts a comprehensive literature review on the aspect of funding in the management of Marine Protected Areas (MPAs) using bibliometric analysis through the VOSviewer software. Indonesia, as a country with high biodiversity, heavily relies on marine ecosystems, making effective MPA management reliant on adequate funding for monitoring, surveillance, and habitat rehabilitation. International publication data were collected from Scopus (2000-2024) using the keywords "Marine + protected + area + finance", yielding 47 articles analyzed to map research trends and relationships among factors. The analysis results show an increase in studies since 2017, focusing on MPA management, sustainability, environmental protection, biodiversity, and financial aspects. Network visualization reveals strong interconnections between funding, governance, and community participation in MPA management. In conclusion, funding is a critical aspect that still requires further development through additional research.
The Boosting the Economy of Mariculture in Marine Conservation Areas to Improve the Economy of Small Islands in the Thousand Islands
Mariculture is a form of blue economy activity that has the potential to produce food supplies, employment, and long-term sustainability. Sustainability is usually determined by the quality of the habitat and environment embedded in conservation programs. The existence of conservation related to mariculture stimulates sustainability as a driver of fish biomass, a healthy environment, and high production. A study on boosting the blue economy in conservation areas is important to determine the ability of conservation to support fishery production. The study was conducted in the Seribu Islands in buffer zones and settlements where aquaculture is already developed. The results show that aquaculture activities do not yet adhere to the principles of the blue economy. In general, an increase in conservation status can increase production to a limited extent. Over 15 years of average aquaculture operations, there has been an increase in income, but it is low yet significant. Similarly, coral cover has not shown significant development, and production increases are only significant when coral cover exceeds 30%. Therefore, it can be explained that improving ecosystem quality is essential to strengthening the blue economy. Keywords: Blue Economy, Conservation, Marine Economy, Seribu Island, Small Island.
Copyright (c) 2024 Jurnal Pengelolaan Perikanan Tropis (Journal of Tropical Fisheries Management) https://creativecommons.org/licenses/by-sa/4.0
Exploring the Social-Ecological System Connectivity of a Small-Scale Coral Reef Fisheries: The Case of Ranobe Bay, Madagascar
The southwest coast of Madagascar is home to small-scale Coral Reef Fisheries (CRFs), a vital activity for livelihoods and the local economy of the fishermen community. Understanding all about the components of this CRFs, the nature of their interactions and the resulting outcomes is crucial for designing policies that promote equitable and sustainable fisheries. This research aims to apply the Social-Ecological Systems (SES) framework and network analysis to assess the SES structure and the characteristics of Ranobe Bay CRFs, Madagascar. This research was carried out from September to October 2024, requiring primary data from field observations, interviews with respondents, and secondary data from literature studies. The Socio-Ecological Network Analysis (SENA) was used to analyze the connectivity of the CRFs in this region. The research findings of the SENA results showed that this fishery is heavily centered around the fishermen's community: the Masikoro and the Vezo as the main actors of this activity. Nevertheless, according to the cluster value analysis, the findings highlight a high number of clusters showcasing a low connectivity and less compact SES structure. Ranobe Bay's CRFs' sustainability depends on fishermen's central connectivity within the network, which can be strengthened through improved policies and management to ensure effective governance.
Social-Ecological System (SES), Social-Ecological Network Analysis (SENA), Coral Reef Fisheries (CRFs), Ranobe Bay, Madagascar
Sustainable Mariculture Development in Mohéli, Comoros: Gather and analyze environmental and economic prerequisites for different types of mariculture from existing literature to develop scenarios and assess potential implications with local communities
Mariculture, or the cultivation of aquatic organisms, holds the potential of enhancing food security, income diversification, and overall economic sustainability. To ensure its growth in the long run, it has to be sustainable particularly from the perspective of local communities, economically profitable, and environmentally friendly. The aim of this paper is to assess the acceptability for the feasibility of potential mariculture development in Mohéli, Comoros, a place with no existing mariculture activity, using Multi-Criteria Decision Analysis (MCDA), scenario planning, and stakeholder preference elicitation. Interviews and focus group discussions were conducted with key stakeholders, including local fishers, lawmakers, and environmental experts, to collect data. The results of the study show that economic gain is the main driving force behind the support for mariculture in the assessed communities, but acceptability is also a function of environmental aspects. Of the many mariculture options, seaweed farming was found to be the most recommendable because of its short harvest period, minimal impact on the environment, and low costs. The study shows that there is a need for specific awareness campaigns, collaborative decision making, and strategically changing management measures to solve ecological and socio-economic problems. The present research can be helpful in this regard as it suggests a method of integrating community interests with scientific decision-making tools to develop a roadmap for the growth of sustainable mariculture while ensuring that there is harmony between social, environmental and economic aspects of development in coastal areas.
Keywords: Mariculture; Community acceptance; Sustainability; Mohéli; Multi-Criteria Decision Analysis.
Catch, Effort and Distribution of Small Pelagic Fisheries in the Java Sea
Fisheries management area (FMA) 712 or the Java Sea is one of Indonesia's most extensively exploited waters and is renowned for its productivity as a fishing ground. The dynamics of fish resource utilization in these waters are indicative of the high complexity of the extant fisheries system, with small pelagic fish resources having been subject to exploitation through various changes in gear technology thus increasingly competitive fishing grounds. Therefore, there is a need data on current distribution and catch trend of small pelagic fisheries in the Java Sea through the use of fishery dependent data as an integral part of sustainable fisheries management. The present study utilizes fishing logbook data to analyze the status of small pelagic fish resource utilization in the Java Sea. The study utilized fishing logbook data downloaded from the database application of the Fishing Logbook Information System of the Indonesian Ministry of Marine Affairs and Fisheries, covering the period from 2018 to 2022. The subsequent processing of catch data was conducted using Microsoft Excel software, whereas the distribution of fishing areas was analyzed using QGIS tools. The analysis revealed a tendency for a decline in the catch of small pelagic fisheries for the Indian Mackerel (Rastrelliger kanagurta), Short Mackerel (Rastrelliger brachysoma), Fringescale Sardinella (Sardinella fimbriata) and Shortfin Scad (Decapterus macrosoma). Only Yellowstripe Scad (Selaroides leptolepis) showed an increased catch trend in that period. It was further observed that the fishing grounds of all fish species remained consistent on an annual basis. The Shortfin Scad fishing grounds were found to be uniformly dispersed within FMA 712, exhibiting a tendency to congregate along the Java Sea border with Borneo waters. Short Mackerel have been observed to be frequent in fishing grounds of the eastern to western Java Sea. In contrast, Indian Mackerel have been noted to be more prevalent in the waters of South Borneo and the western Java Sea. The distribution of Yellowstripe Scad fishing grounds appears to be uniform within FMA 712. Fringescale Sardinella fishing grounds have been identified as being predominantly concentrated in the western Java Sea and in Borneo waters.
Catch and Effort, Distribution, Fishing Logbook Data, Java Sea and Small Pelagic Fisheries
Production Shock Phenomenon: An Overview of (Scomberoides sp; Megalaspis sp; and Decapterus sp) Production in Sunda Strait-Indonesia
In the last decade, fishery production has decreased (production shock) due to causes such as excess effort, climate change, and implications of inappropriate policies. The consequences of the policy also increase the risk and vulnerability of fish stocks and affect food security. This research was conducted in the Sunda-Indonesia Strait in 2019 using production data, efforts, and the results of interviews with fishers in Lempasing Landing Port-Lampung. The analysis carried out included the CPUE trend as an indicator of productivity, MSY analysis, and prediction models of changes in effort patterns in 3 species of Decapterus, Scomberoides, and Megalaspis sp. The results obtained during 2010-2019 show that the three fish species' production has decreased, including efforts. Efforts to catch Decapterus decreased 27.3% per year, Scomberoide decreased efforts by 18.8% per year, and Megalaspis decreased rates of efforts by 14.32% per year. The productivity assessed from CPUE appears to be increasing, which is influenced by a decrease in the effort. Stock potential with the three species' Fox model shows an under fishing status, which means the high stock or low effort. The production that decreases during under fishing indicates a production shock due to reduced fish stocks or decreased fishing capacity. The potential for production shock can increase due to natural disasters and inappropriate policies.
Production Shock, Small Scale Fisheries, Productivity, Food Security, Fisheries Policy, Sunda Strait.
Copyright (c) 2025 Jurnal Pengelolaan Perikanan Tropis (Journal of Tropical Fisheries Management) https://creativecommons.org/licenses/by-sa/4.0
A SUSTAINABLE MANAGEMENT STRATEGIES FOR SCALLOP (Amusium pleuronectes): ECOLOGICAL AND SOCIO-ECONOMIC PERSPECTIVES
The sustainability of scallop (Amusium pleuronectes) populations in South Sulawesi faces critical challenges due to habitat degradation and overexploitation. This study assesses ecological, social, and economic dimensions of scallop fisheries across five coastal regions: Pangkep, Takalar, Barru, Sinjai, and Selayar. A total of 750 scallops were sampled, and data on shell size, habitat quality, and socio-economic reliance were collected. The findings reveal a strong correlation (r = 0.82, p < 0.05) between habitat quality and scallop size, with optimal conditions in Sinjai yielding the largest scallops (mean shell length = 11 cm). Economic analysis shows that scallops contribute up to 25% of household income in certain regions, but unsustainable harvesting practices persist due to limited community awareness. This research highlights the need for ecosystem-based management, including habitat restoration, harvesting regulations, and community engagement programs. By integrating ecological and socio-economic insights, the study provides actionable recommendations for balancing conservation and livelihoods, offering a model for sustainable marine resource management.
Analysis of Catch Per Unit Effort (CPUE) and Maximum Sustainable Yeild (MSY) Skipjack Tuna (Katsuwonus pelamis) Landed at the Kendari Ocean Fishing Port (PPS)
Ikan cakalang merupakan salah satu ikan pelagis besar yang didaratkan di Pelabuhan Perikanan Samudera (PPS) Kendari. Tujuan dari penelitian ini adalah untuk menganalisis Catch Per Unit Effort (CPUE) dan Maximmum Sustainable Yield (MSY) ikan cakalang Katsuwonus pelamis) yang didaratkan di PPS Kendari. Penelitian telah dilaksanakan pada bulan November-Desember 2023 di PPS Kendari. Data yang diperoleh di PPS Kendari tahun 2016-2022 antara lain hasil tangkapan ikan cakalang yang didaratkan, jenis alat tangkap yang digunakan, dan jumlah hasil tangkapan setiap alat tangkapnya. Metode yang digunakan dalam penelitian ini adalah metode surplus produksi. Alat tangkap yang digunakan untuk menangkap ikan cakalang yang didaratkan di PPS Kendari yaitu gillnet, hand line, pole and line, purse seine, bagan perahu, penganggkut dan lain-lain. Alat tangkap yang dijadikan sebagai alat tangkap standar yaitu pole and line. Hasil analisis nilai CPUE ikan cakalang yang didaratkan di PPS Kendari cenderung berfluktuasi CPUE tertinggi terjadi tahun 2020 yaitu sebesar 3.670 kg/trip dan nilai CPUE terendah terjadi pada tahun 2018 yaitu sebesar1.578 kg/trip. Berdasarkan Hasil analisis MSY diperoleh nilai upaya penangkapan optimum sebesar 2126 trip/tahun dan nilai tangkapan optimal sebesar 6.130.516 kg/tahun. Pemanfaatan ikan cakalang di PPS Kendari belum mencapai (overfishing) maka dapat disimpulkan bahwa upaya penangkapan ikan cakalang belum melebihi batas stok lestari yang ada pada perairan laut banda, sehingga upaya penangkapan dapat ditingkatkan untuk mendapatkan hasil yang maksimal tetapi tetap berdasar pada batas MSY yang telah diperhitungkan.
Optimization Of Vaname Shrimp (Litopenaeus Vannamei) Ponds Using A Social Ecological System (SES) In Jatimalang Village, Purworejo Regency
Many vannamei shrimp (Litopenaeus vannamei) ponds in Jatimalang Village are not producing, despite the fact that the potential for success in the pond industry is quite strong, as evidenced by high market demand and the suitability of the area for pond construction. As a result, this research was carried out in order to identify the source of the problem and offer remedies that can be implemented using the Social Ecological System (SES) approach and the method DPSIR (Driving Forces, Pressures, State, Impacts, and Responses). According to the research, the less than optimal pond land in Jatimalang Village was caused by a variety of factors, so it was necessary to have microfinance, infrastructure provision, farmers' ability and knowledge in pond management, the formation of farmer groups, a policy of converting land into ponds, the application of WWTP, changes in farmers' lifestyles, routine monitoring of water quality, the application of pond biosecurity, and business.
Coral Reef Transplantation Towards Ecotourism on Pramuka Island
Indonesia is a country with high biodiversity. However, Indonesia also has the second highest rate of biodiversity decline in the world. Coral reef ecosystems are highly productive ecosystems that play an important role in terms of ecology and economy. One of the ecological conservation efforts that have been carried out by the community in the tourism sector on Pramuka Island is implementing the concept of ecotourism. Ecotourism is tourism with environmental and educational principles, and can be realized in natural environment restoration activities. One of the coral reef ecosystem restoration activities that has long been carried out on Pramuka Island is coral transplantation. 39% of tourists were satisfied with the concept of ecotourism. These tourists stated that the concept of ecotourism was appropriate to be applied in society, because it was considered capable of improving many sectors such as tourism and the economy, as well as improving ecological conditions for the better in a sustainable manner. There are several communities on Pramuka Island that are involved in the ecotourism sector, one of which is the Smiling Coral Indonesia (SCI) group. One of SCI's flagship programs is coral reef restoration based on sustainable tourism. Ecotourism can strengthen the community's economic sector, one of which is creating jobs. This means that ecotourism has two important roles that have good potential to be developed. Ecotourism has a positive impact on the ecosystem and is one of the community's economic resources.
Coral reef ecosystems, coral transplantation, economic development, ecotourism, sustainability
Density, Water Quality Suitability and Size Distribution of Pokea Clams (Batissa violacea var. celebensis, von Martens 1897) at Lasolo River Southeast Sulawesi
The pokea density and its size distribution are different in every place and time which influenced by water quality. This study aimed to determine the density and suitability of water quality, and size distribution of pokea at Lasolo River, Southeast Sulawesi. Pokea samples were collected randomly in all water segment every month for 1 year in the area of Lasolo River, North Konawe. Some samples of pokea were collected using the wide range of tangge fishing gear (traditional tool/ traditional fishing gear) as much as 6 pull times. In the process of collecting the sample of water quality, it was done simultaneously with the samples of shell. The shell density in every place and time was analyzed using the Mann-Whitney test. The preferences of pokea in water quality were analyzed using Principal Component Analysis (PCA) and Group Analysis (CA) in the package of multivariate statistical program (XLSTAT). The results of this analysis showed that the density of the middle of estuary was significantly different (higher) than its density in the initial and final regions which found upstream (lowest density) and in the estuary area, while the density of pokea was not significantly different in each month of observation. The pokea were dominantly found in small size (1.62-2.10-3.09-3.57 cm). The size of the pokea were distributed in all water segment, which were so many in May and June. The preferences habitat of pokea were the slow-flowing, high-brightness, and deep water.
Batissa violacea, clams, density, size, water quality
Ecoregional Site Study on Small Islands: A case study of the significance of flora for fisheries in the Anambas Islands
The formation of the Anambas Islands was a form of earth's surface dynamics that occurred over millions of years. In the process, there were at least eight land formations on the Sunda shelf. This evolution of the earth's surface led to the emergence of large islands on the Sunda shelf along with small islands around them. This also makes the Sundanese shelf part of the volcano's volcanic route. The Bunguran Formation was a bedrock complex that is thought to originate from deep-sea sediments of the Jurassic-Cretaceous age. The rocks are quite old, indicating that this formation was exposed to the surface and formed islands in the arc of the Anambas Islands group. All of these natural processes create a unique type of ecosystem, namely a rocky beach ecosystem, where the rocks at the study location were large rocks with cliffs on some of the coastlines. Meanwhile, sloping and protected locations allow the dust substrate to mix with sand to create a thin mud that allows mangrove forests to grow. Development in Anambas was carried out to grow the economy in this region. The Regional Government consistently develops in various fields. Some that stand out are the fisheries, tourism, and oil and gas sectors. It was believed that forests play a role in maintaining fisheries stocks on the coast, especially mangrove forests. Because of this, there was a need for a study that could display the flora profile in the Anambas Islands ecoregion. The results of the study show 23 species of flora in coastal forests and seven species of mangroves.
Feasibility of Ray Processing Business in Cilacap, Central Java
Stingrays constitute a demersal fish variety prominently distributed in Indonesia, particularly in Cilacap. The flesh of stingrays is widely consumed and undergoes various forms of processing. In Cilacap, stingrays are notably transformed into salted fish, emerging as export commodities such as fillet meat, leather crafts, bones, fins, and gills. The research conducted on stingray processing aims to assess the business feasibility in Cilacap, Central Java, spanning from March to April 2022, specifically in the Menganti Village. Primary data was garnered through interviews with 10 respondents, comprising both fishermen and stingray processors. The analysis of primary data, focusing on business feasibility, reveals that the stingray processing venture is highly viable. This is evidenced by the Break Even Point (BEP) with an average R/C ratio of 11.6, surpassing the threshold of 1.0, indicative of favorability. The Payback Period (PBP) for the investment stands at four months, with an accompanying average profit of Rp. 396,892,142.9.
Biodiversity and Vulnerability of Fisheries Resources in Berau Bay, West Papua Province
Berau Bay, located in West Papua Province, is one of Indonesia's marine areas rich in biodiversity. This aquatic ecosystem is a crucial habitat for various fish species, which hold ecological and economic value for the local communities reliant on fisheries. However, increased human activities, including intensive fishing, pollution, and climate change, pose severe threats to the sustainability of fish resources in this region. This research aims to assess the biodiversity and vulnerability levels of fish resources in the waters of Berau Bay. The methods used include field surveys, fish sampling, species identification analysis, and calculating the diversity index. The vulnerability levels of fish resources are determined by categorizing their conservation status according to the IUCN Red List. The study results indicate that Berau Bay has a relatively high level of biodiversity with low dominance. The highest biodiversity index value in Berau Bay waters is 3.35, dominated by the families Carangidae and Scombridae. The vulnerability analysis results show that 85.71% have a low vulnerability level. However, several species exhibit high vulnerability due to excessive fishing activities, pollution, and climate change. These findings emphasize the importance of implementing effective conservation measures to ensure the sustainability of fish resources in this area. Efforts to protect habitats, manage sustainable fishing practices, and educate the local community are expected to reduce vulnerability and enhance the sustainability of the Berau Bay aquatic ecosystem.
Biodiversitas, Kerentanan Sumberdaya Ikan, Konservasi Perikanan, Papua Barat, Teluk Berau
Water Quality in the Habitat of Sembilang Fish (Plotosus canius) in the Estuary of Langsa City
Sembilang Fish (Plotosus canius) is one of the fish found in estuarine waters, and it's quite popular with the community. Excessive fishing by the community causes the habitat of sembilang fish to be threatened to decrease. The purpose of this study was to determine the water quality and examine the environmental conditions of sembilang fish in the dry season and rainy season in the estuary waters of Langsa City as the basis for domestication. This study used a descriptive method by collecting water quality data at 3 research stations and collecting fish data that was taken from fishermen's catches in Langsa estuary waters. The results showed that the water quality parameters observed in the dry season and rainy season in the estuary were still in decent condition for the life and existence of sembilang fish. Season greatly affects the body weight of both male and female fish. In the dry season, the female weight ranges from 120–220 g and the male 120–240 g, while in the rainy season, the female weight ranges from 134-572 g and the male 136–260 g.
Domestication, Estuary, Sembilang Fish, Water Quality, Langsa City.
Copyright (c) 2024 Journal of Tropical Fisheries Management
Analisis Pola Pertumbuhan Ikan Ekor Kuning (Caesio cuning) Yang Didaratkan Di Kawasan Pelabuhan Ikan Muara Angke, Jakarta
Yellowtail Fusilier (Caesio cuning) is one of the fish caught by fishermen landed in Kaliadem, which is then sold at Muara Angke Fish Market, Jakarta. (Caesio cuning) has high economic value and has been widely consumed by various circles of society. This study aims to determine the heavy relationship with morphometric variation of (Caesio cuning) to obtained fish growth pattern. The collection of 30 fish samples was carried out in April 2018 with a survey method at the Muara Angke Fish Market. Morphological observations were carried out traditionally using a ruler with 0.01 mm accuracy and weighed using analytical scales with an accuracy of 0.01 gr. The analysis used for morphometric and fish weight measurement data is multiple linear regression. The results obtained that the overall morphometric character affects fish weight by 98.4%, where the morphometric characters in the mouth length (PM) have a positive effect on fish body weight with a p-value of 0.048 and coefficients of 21.843. This figure can be assumed that every time there is an addition to the mouth length of 1cm, it will increase by 21.8gr fish body weight with category positive allometric growth pattern.
Sustainability Status Analysis of Seaweed Cultivation (Eucheuma cottonii) in Barru Regency: Rap-Seaweed Modification Method
Barru Regency is one of the largest seaweed producing areas in South Sulawesi. The sustainability of seaweed cultivation is influenced by various factors, including ecological, economic, social, institutional and technological. This study aims to analyze sustainability status of seaweed cultivation in Barru Regency. The method used is Multidimensional Scaling (MDS) approach which is analyzed by RAP SEAWEED. Several parameters from each dimension were analyzed to assess existing condition of seaweed cultivation in Barru Regency. The results showed that seaweed cultivation in Barru Regency was classified as quite sustainable on social and technological dimensions and was classified as less sustainable on institutional, economic and ecological dimensions. Parameter analysis using stress, R-Square, and monte carlo values shows accuracy of model and attributes are feasible for use in analysis. The results of sustainability status analysis which are still classified as lacking need to be addressed by taking into account several attributes that have high sensitivity in leverage analysis. Evaluation of attributes for increasing sustainability score can be a basic consideration in formulating a strategy for sustainable management of seaweed cultivation in Barru Regency
Eucheuma cottonii, RAP-SEAWEED, seaweed, sustainable
Reproductive Biology of Baronang Fish (Siganus guttatus, Bloch 1787) in the Seribu Archipelago, Jakarta
One important aspect of managing rabbitfish is conducting studies on their reproductive biology. The aim of this research is to examine aspects of the reproductive biology of rabbitfish, which include sex ratio, size at first maturity of gonads, spawning type, spawning season, and reproductive potential. This research was carried out five times, namely from November to December 2014 and April to June 2015 in the Seribu Islands. A total of 210 sample fish were observed, consisting of 64 female fish and 146 male fish. The results showed that the sex ratio of rabbitfish was unbalanced, the growth pattern was isometric, the average reproductive potential of rabbitfish was 96 000 eggs, and the spawning type was total spawning.
reproductive biology, baronang fish, Seribu Archipelago
Optimizing The Potential and Development Strategy of The Mangrove Ecotourism Area in Tangkolak Village, Karawang Regency
The Tangkolak mangrove ecotourism area is one of natural attractions, namely a mangrove forest in Sukakerta Village, East Cilamaya Sub-district, Karawang Regency, West Java Province. The mangrove ecotourism of Tangkolak currently have no management and low visitor. This research aims to describe the potential and identify applicable strategies through internal-external factor analysis within the Tangkolak mangrove ecotourism area. Four station points revealed a potential of 14 mangrove vegetation species and 10 fauna species. The most mangrove species all stations is Rhizophora apiculata, while the dominant fauna is Ciconia sp. The mangrove vegetation in the Tangkolak mangrove ecotourism area exhibits a low diversity index (H') and there’s no dominating species in each stations, whereas the fauna in the area showcases varied diversity index values with Ciconia sp. as the dominant species. Visitors and local fishermen in the surrounding community utilize fishing tools like a fishing rods, traps, and nets when catching fish in the vicinity of the mangrove ecotourism area. The development strategy is determined using SWOT analysis. The results of IFAS and EFAS analyses indicate that the development strategy for the Tangkolak mangrove ecotourism area falls within the coordinates (2.5; 2.6) in quadrant I, signifying a combination of strengths and opportunities (SO strategy).
Potential, Strategy, Mangrove Ecotourism
The Relationship between Seagrass Type Density and CO2 Emissions in Negeri Waai Waters, Salahutu District, Central Maluku Regency
Coastal communities produce both inorganic and organic domestic waste. The waste is partially retained and deposited in seagrass ecosystems and decomposed, which causes the release of CO2 gas. This study aims to analyze the relationship between seagrass density and CO2 gas emissions on the coast of Negeri Waai, Central Maluku Regency. The research method using a cylinder chamber and gas emission analysis refers to gas chromatography analysis (GC-MS) results. The results showed that the largest CO2 emission at station I was found in C. rotundata species at 55.91 mg/m2/hour and the lowest in E. acoroides species at 5.51 mg/m2/hour. While at stations II and III, the largest emissions were found in T. hemprichii species with values of 66.68 mg m2/hour and 33.57 mg/m2/hour, respectively. Meanwhile, the relationship of seagrass density of E. acoroides to CO2 emissions was formulated with y = 11.318x – 8.3343, and the level of correlation was very strong (r = 0.93). The same thing was seen in seagrasses C. rotundata and T. hemprichii with linear regression equations, respectively y = 14.284x + 10.751 (r = 0.9629) and y = 19.085x (r = 0.96 ). It shows that the denser the seagrass, the more organic matter can be decomposed to form CO2 emissions. In addition, high emissions can also be influenced by microalgae epiphytes that respirate, triggering an increase in CO2 emissions in the atmosphere.
CO2 gas emissions, seagrass ecosystems, correlation, climate change.
Morphometric Analysis of Decapterus russelliin Transitional Season 1 Landed at Kaliadem and Muara Angke Fish Market, Jakarta
The aim of this study was to determined reproductive biology (sex ratio, gonad maturity stages, fecundity and size of first maturity) of the sentinel crab (Podophthalmus vigil) in the west Tiworo Strait.Samples were obtained from the bycatch of the crab fishermens using trap.Each sample obtained was indetified thesex,carapace width and body weight were measured. Sex ratio was analyzed using Chi-square test (p<0,05). Gonad maturity levels was observed from changes in gonad morphology and color. The crab fecundity was calculated using the gravimetric method. The crab fecundity was calculated using the gravimetric method. The results of the study obtained a sex ratio of 1: 4.09; showed an imbalance between males and females. The gonad development of male P. vigil was dominated immature gonads, while that of females was dominated by mature gonads. Fecundity of P. vigil ranged from 415,644-3,466,290 eggs, and the size 50% at the first maturity of female crab was 92.29 mm.
Copyright (c) 2023 Journal of Tropical Fisheries Management
Reproductive Biology of Sentinel Crab (Podophthalmus vigil) in The West Tiworo Strait, South Konawe, Southeast Sulawesi
fecundinty, podophthalmus vigil, reproductive biology, sex ratio, tiworo strait
Otolith Growth Ring Pattern of Pangasius polyuranodon from Kampar and Siak River, Riau Province
Juaro (Pangasius polyuranodon) are found in the Kampar River and Siak River in Riau Province. The waters of the Kampar river are still in accordance with the quality standards and the waters of the Siak River are indicated by liquid waste pollution as evidenced by the results of air quality measurements, namely free CO2, BOD, Phosphate which are below the quality standard according to Government Regulation No. 82 of 2001. Decreased air quality can affect fish growth. and from the circular pattern of otolith growth. This study aims to determine the growth pattern of juaro fish in the waters of the Kampar and Siak rivers. This research was conducted in March – June 2019. The research method used a survey method. The otolith was sharpened using the Windarti (2013) method to see the growth circle pattern. Furthermore, the pattern and number of Dark Growth Circles (LPG) were seen using a microscope. 60 fish samples were taken (30 fish from the Kampar River and 30 from the Siak River). The results of the study showed that the LGP muscle of juaro fish from the Kampar River had 1 dark circle, while in the Siak River the darkest circle opened 3 pieces. These results concluded that the growth rate of juaro fish in the Kampar River and Siak River had experienced obstacles/disruptions in their lives.
Juaro (Pangasius polyuranodon), Otolith, Growth Pattern, Kampar River, Siak River.
Budget value of mangrove ecosystem services in The Coastal Area of Dumai City
Mangrove ecosystem services in the coastal area of Dumai City have a value for the availability of goods and services that are utilized by the community in the vicinity. The purpose of the study was to assess the balance of mangrove ecosystem services in the coastal area of Dumai City. The data collection method in this study was a survey and interview method with the help of a questionnaire, besides that, literature review and discussions with mangrove ecosystem experts were also carried out. Data analysis used the identification of mangrove ecosystem services with a fishbone diagram approach and an assessment of the availability of ecosystem services using the bukhard model. The results of the study stated that most of the coastal communities of Dumai City benefited from the existence of the mangrove ecosystem for service providers and regulatory services. The largest service provider provided by the mangrove ecosystem is providing fish and crustacean resources such as shrimp and crabs, while the largest regulatory service that is useful is as a barrier to abrasion and reducing ROB flooding. The results of the assessment of the availability of mangrove ecosystem services indicate that in general the demand for mangrove ecosystem services exceeds the supply/capacity of mangrove ecosystem services (negative value), especially settlements, industries, resorts and hotels, and restaurants. This value states that the potential of the mangrove ecosystem has been utilized beyond the limit, so that sustainable management is needed in the utilization of the mangrove ecosystem.
bukhard model, coastal of Dumai City, mangrove ecosystem services, social-ecological system.
Heavy Metal Content in Green Mussels (Perna viridis) Cultivated in Ketapang Village, Tangerang Regency
The aims of the study were: (1) to test the metal content in green mussels; (2) testing the metal content in seawater for aquaculture activties; and (3) calculating green mussel business income. The research was conducted in May-July 2022 at four locations, three locations in the green mussel cultivation area and the fourth location in the green mussel collection area owned by a fisherman. Selection of sampling locations by purposive sampling. Primary data was collected by field survey methods and interviews with 9 green mussel cultivators. Secondary data was obtained from the Department of Maritime Affairs and Fisheries of the Tangerang Regency and scientific publications, including other research supporting data. Data analysis of metal content in green mussels according to the Indonesian National Standard (SNI) No. 7387-2009; Analysis of heavy metal content in seawater refers to the government regulation No 22 of 2021 concerning on the implementation of environmental protection and management seawater quality standards, especially for marine life; identification of trap catches was analyzed descriptively; analysis of green mussels chart business income using net income (𝜋), R/C ratio, and payback period. The results showed that the metal content in green mussels at location 1 exceeded the threshold value compared to the other three locations; all metal content in sea water does not exceed the threshold value. This means that the mussels can still be consumed by the public and the waters are good for mussel cultivation. Mud grouper is the main catch of traps associated with green mussel cultivation sites and the highest R/C in respondents No. 1 and 6 with a payback period of <3 years, showing that the rate of return on business capital is categorized as fast.
green mussels, heavy metal, Tangerang Regency
Periphyton as a Bioindicator in Pulau Pedalaman Waters, Mempawah Regency, West Kalimantan
Pulau Pedalaman Mempawah Regency is a potential public water area in the form of small lakes and protected forests. Has an important role in the life of microorganisms in waters, but is vulnerable to environmental changes and pollution caused by human activities. This study aims to determine the community structure and saprobity index as well as to determine the condition of the waters based on periphyton in the waters of the Inland Island Region of Mempawah Regency. Sampling and water quality measurements were carried out for 3 months, from September to November 2021 at five research stations. The results showed that 44 genera were identified as belonging to 4 classes, namely Bacillaiophyta, Chlorophyta, Cyanophyta and Euglenophyta. The highest relative abundance of periphyton was Bacillariophyta (84.70%). Followed by Chlorophyta (14.90%), Cyanophyta (0.17%) and Euglenophyta (0.22%). Overall diversity indices from all sampling locations showed high diversity or tended to have fairly stable waters. The saprobity index value was in the light to very light pollution level which was in the Meso/Oligosaprobic and Oligo/mesosaprobic phases.
Periphyton, Bioindicator, Pulau Pedalaman
Mapping of Fish Landing Land Based on Commodities Landed on Banyak Island, Aceh Singkil
Pulau Banyak and Pulau Banyak Barat Districts. play an active role in advancing capture fisheries production, this can be seen from the larger number and size of vessels operated so as to produce larger capture fisheries production. To land and sell their catch, many private entrepreneurs do it in their private holdings, not in government-owned fishing ports. This Tangkahan generally has relatively little land and facilities, but the activities and production are relatively large. This study aims to analyze the catch landed on the Tangkahans of Banyak Island, Aceh Singkil and make a map of the location of the Tangkahans in Pulau Banyak, Aceh Singkil. The method used is in 2 stages, the first stage is conducting a field survey using interview questionnaires, and the second stage is collecting field data (coordinate points of Tangkahan, types of catches and aerial photos of Tangkahan Island many). The location of the research is on Banyak Island, Aceh Singkil. The results of the study showed that there were 12 Tangkahans in Pulawa many, of which 8 units were in Baguk Village and 4 units were in Balai Desai. The catches that landed consisted of Squid, Dencis Fish, Tuna, Coral Anchovy and others. This is because the fishing gear used by Pulau Banyak fishermen is dominated by Bagan.