Fisheries Management Area Research Articles

DNA Barcoding of Anchovy in Tuban Regency as Database of Indonesian Marine Genetic Diversity

Anchovy is the main catch and the primary consumption of coastal communities in Indonesia, and its production shows an increase of more than 10% in 2021. Tuban district, in East Java, Indonesia is part of the WPP 712 (Wilayah Pengelolaan Perikanan or Fisheries Management Area) and highly produces anchovies’ fisheries. Anchovy has a small size, making it difficult to identify morphologically. This study aimed to genetically identify anchovy samples obtained from North Java (Tuban) waters. Molecular identification was conducted by utilizing Cytochrome Oxidase Subunit I (COI) gene using jg-HCO and jg-LCO primers. This study observed 12 individual samples with 623 base pair sequence length. Five species were obtained, namely four species of anchovies (Encrasicholina heteroloba, Encrasicholina punctifer, Stolephorus waitei, and Stolephorus insularis) and one species of sardines (Dussumieria elopsoides) with 99.84-100% similarity to NCBI sequences data. Anchovies typically have a streamlined body with a slightly compressed shape. Anchovies have cycloid scales, which are smooth-edged and relatively small, ranging from a few centimeters to around 20 centimeters in length. Some of the genus from the Anchovy group are Encrasicholina and Stolephorus. The phylogenetic tree reconstruction leads into four clades with a genetic distance between clades of 17,9-24,5 %. This research provides methods and data on the genetic diversity of anchovies taxa caught in Tuban, East Java. The findings are expected to support promoting new standards for healthier and more sustainable anchovy stocks in the country. Overall, this study contributes to providing valuable insights for fisheries management and conservation efforts in Indonesia.

Management of Malabar Red Snapper, Lutjanus malabaricus (Bloch and Schneider, 1801): Based on the Ecosystem Approach to Fisheries Management (EAFM) in Rembang Regency

Malabar Red Snapper, Lutjanus malabaricus (Bloch and Schneider, 1801), is one of the leading commodities in the Indonesian Fisheries Management Area (WPPNRI 712). According to central statistics agency (2018), the trend for Malabar red snapper production has continuously increased over the last 5 years (2016-2020). The trend of red snapper production is inversely proportional to the state of the demersal fish resource potential in WPP 712, which is fully exploited (Rizal et al., 2023). Open-access fish resources must always be monitored and regulated for their utilization. An effective fisheries management model, namely the Ecosystem Approach To Fisheries Management (EAFM), was used. Research on red snapper fisheries management with EAFM provides an opportunity to address key challenges in fisheries management within Indonesia. A significant advantage of EAFM is its comprehensive scope, encompassing the entire fish resources and the important role of institutions in their management. The aim of this study is to analyze the current status regarding the management of the Red Snapper fishery for the development of a strategic plan. The data collection from each EAFM indicator was conducted using the Multi-stage proportional sampling technique. Data analysis used the multi-criteria analysis (MCA) approach. The assessment of red snapper resource management in Rembang Regency, based on the analysis of all ecosystem domains, obtained a score of 49.8. This score showed that the current status of red snapper resource management is in line with the implementation of EAFM, so that yellow flag color code is required.

Pantai Labu Fish Auction Place with an Ecological Architectural Approach

Geographically, Indonesia is the largest country in the archipelago. The length of Indonesia's main coastline is known to reach 81,000 km. Based on these results, a fishery management area is needed that is appropriate and as high as possible to ensure the management of fisheries that are rich in marine animals. Pantai Labu Fish Auction Place is a potential place for fisheries. The marine sector is quite large, including capture fisheries, power culture fisheries the processing and marketing of fishery products. As well as supported by Supervision and other activities. One of the Fish Landing Places in Deli Serdang Regency is Pantai Labu Fish Auction Place. Fishing in Pantai Labu is important because the livelihood of most Paluh Sibaji people is fishing. However, the situation at the fish auction may have improved, leaving many customers feeling unhappy. Not only buyers but fishermen, the main actors in this fish auction site, also need qualified facilities. The application of ecological architecture in the renewal of the Fish Auction Place is one way to be applied in the future. Ecological architecture is vital in designing this fish landing site because an environmental architecture uses natural elements closely related to this Fish Auction Place.

Morphometric Study of Swimming Crab (Portunus pelagicus) Using Truss Network Analysis for Determination of Stock Structure in FMA 711

The crab of Portunus pelagicus is a fishery resource with a wide distribution area and quite diverse environmental conditions in Indonesia, giving rise to morphometric diversity. The study aims to analyze differences in morphometric diversity of crab populations (P. pelagicus) in the waters of Indonesian Fisheries Management Area (FMA) 711, landed in Bintan, Bangka, and Ketapang, which can describe the condition of the crab stock units. A total of 300 individuals were collected from all locations using random sampling. The crab morphometric characters were analyzed using Truss Network body shape method (TNA). The Kruskal Wallis results analysis showed distinguishing in some morphometric characters for both carapace and abdomen. Cluster analysis shows that there were two population groups: The Bintan group, and the Bangka-Ketapang groups. The discriminant analysis on the carapace characters resulting that the crabs from three locations have the potential for more than one stock unit, so different management is needed.

The Growth of Capture Fisheries in Pamekasan Regency, Madura Island

"Groupers, snappers, emperors, and fusiliers are important reef fisheries both economically and ecologically, particularly in Indonesia and the Asian region. However, in some areas, they are still being overfished, and their stocks appear to be declining as a result." As a result, it is critical to comprehend their viewpoint. The purpose of this research is to evaluate the fishery output of some reef fish species in “Indonesia's Fisheries Management Area (FMA) 715” based on life history and spawning potential. Pamekasan Regency should implement an effective capture fisheries strategy to create jobs, ensure food security, and promote economic development. Pamekasan Regency is located along the shore of the Indonesian island of Mathura. The goal of this study was to design a capture fisheries development strategy for Pamegasan Regency. The SPSS matrix analysis methods were employed. This study drew on a wide range of data sources, including statistical data, surveys, and interviews. Key individuals were interviewed, and 30 fishermen were polled. Overfishing was discovered in the waters for Phamegasan Regency, according to the research. Diversification of fishermen owned by families enterprises, establishment of fish auction locations, oversight of fishing gear, expansion of the fish processing industry, warming mitigation, fishing resource studies, extension, and coastal community expansion are some of the capture fisheries growth methods we advocate. These strategies' implementation can be used as a subsequent fisheries strategy. The Pamekasan Regency Government should perform more intensive training and exercises to improve the abilities of salt farmers in Pademavu Sub-District, Pamekasan Regency, through the Fishing Service and other related agencies. The goal of this study's result analysis is to acquire an exhaustive overview of the topic without looking to the specific elements of the topic of research. For the statistical analysis, we used SPSS software version 16.this analysised Cronbach's alpha value for the model is 0.999.

The use of cameras on commercial deep-water trawls to investigate habitat associations and scampi trawl efficiency in New Zealand scampi Metanephrops challengeri

AbstractThis study assessed the effectiveness of using video cameras mounted on commercial trawls for a deep-sea lobster, the New Zealand scampi Metanephrops challengeri, for acquiring information on habitat associations of demersal species and fishing efficiency. Randomly selected frames from 1 h of recording replicated over 12 trawls and conducted over three fisheries management areas (FMA), were analysed for counts of visible scampi, scampi burrows, visible topographical features and visible epifauna and fish taxa. Poisson regression analysis indicated a positive relationship between the distribution of scampi burrows (a proxy of scampi abundance) and conical mounds (formed by bioturbators), but a negative relationship with smooth topography. Counts of scampi burrows were also positively associated with counts of visible scampi for four trawls, while significant relationships were seldom found between counts of scampi burrows and other commonly observed individual taxa. Scampi trawl efficiency was low, with only 56 of the 186 observed scampi (30%) passing over the footrope and into the trawl net. The results confirm the effectiveness of video sampling from commercial trawls to improve our understanding of habitats and fishing efficiency in deep-sea fisheries.

Monitoring Small-Pelagic Fishery Utilization in Java Sea Based on Fishing Log Book

The most attention issue of sustainable fisheries management is related to the availability of catch and fishing efforts data with the spatio-temporal distribution. The monitoring data plays important to evaluate the fish stock status and fishery dynamic in the waters. As dependent-fishery data, logbook data is a reliable data source for estimating the utilization rate of fish resources and designing effective regulation tools in fisheries management areas. This study aims to analyze catch composition, spatial and temporal distribution, and productivity (catch per unit effort) of small-pelagic purse seine fisheries in the Java Sea using fishing logbook data. The result shows the highest It was found that the catch composition of small pelagic purse seines was dominated by longtail tuna/kawa-kawa, scad (Decapterus spp.), and sardinella fimbriata with the highest catches annually occurring in September 2021, March 2020, and November 2019. However, the highest productivity was achieved in September 2021, May 2020 and June 2019, namely 1,290 kg/setting/day, 1,700 kg/setting/day, and 1,660 kg/setting/day, respectively. Regarding spatial distribution, the highest productivity was in the northern and central parts of the Java Sea and the southern parts of Kalimantan.

The genetic connectivity of the silky shark (Carcharhinus falciformis) across Indonesia

Silky shark (Carcharhinus falciformis) has been listed as CITES Appendix II and Vulnerable by IUCN red list. Reports from Indian, Pacific and Atlantic Ocean showed a sharply declining C. falciformis population every year, including in Indonesia. Despite this issue, information on local and regional genetic population structure of this species is still lacking. In this research, we aim to assess the population condition of C. falciformis across Indonesia Fisheries Management Area (FMAs), using mitochondrial genetic data. A total of 225 fins or tissue samples collected from various traditional fish market and shark-fin exporters across Indonesia, then sequenced using mtDNA control region, yielding 510 bp of sequence. The overall Haplotype diversity is high (h: 0.534 ± 0.035). Meanwhile, the nucleotide diversity (θπ) is low (range of 0.00067 – 0.00201) compared to the Atlantic and Red Sea. In addition, the genetic diversity of C. falciformis in Indonesia is lower than other pelagic shark species. Furthermore, AMOVA and Fst results showed a significant structure between Aceh and other locations in Indonesia. Samples from across Indonesia also showed a certain degree of haplotype sharing but with significant genetic structure with others, additionally, the combined dataset revealed a pattern that is similar to previous studies, which showed that the Atlantic population is different from the rest. The distinct genetic population of C. falciformis observed in Aceh may indicate that this population should be managed separately. Meanwhile, the shared genetic information within the Timor Sea indicates the necessity of establishing a co-management plan between Indonesia and neighbouring countries such as Timor-Leste and Australia to ensure the sustainable use of this marine resource.

Density distribution of Penaeus merguensis De Man, 1888 based on habitat in the waters of Merauke District, South Papua Province, Indonesia

Abstract. Lantang B, Najamuddin, Nelwan AFP, Samawi MF. 2023. Density distribution of Penaeus merguensis De Man, 1888 based on habitat in the waters of Merauke District, South Papua Province, Indonesia. Biodiversitas 24: 4427-4437. The waters of Merauke District, located in the Arafura Sea area, have relatively hight penaeid resource, but prawn fishing productivity is the lowest of 11th other Indonesian fisheries management areas.. The optimization of the fishery resource utilization remains poor after the moratorium on fishing vessel licensing in 2014, which is only 11%. Hence, a study is needed to determine the resources’ distribution, abundance, and sustainability. This research aims to analyze the density distribution of banana prawn (Penaeus merguensis De Man, 1888) based on the habitat type, each location separated by ~4-5 kilometers within the coastal ecosystem waters of Merauke District. The research was carried out from March to August 2022. Data were collected within each habitat: the catch, prawn fishing equipment, and oceanographic parameters, and then analyses were undertaken using statistical tests. The results showed that the highest density of banana prawn was obtained in shallow waters adjacent to the mangrove habitat at Bokem (32.68 kg/km2) and Yobar (20.27 kg/km2). In waters adjacent to the sandy beach at Payum (17.98 kg/km2), the density was higher than within the estuarine habitat of Maro River (14.60 kg/km2) and adjacent to the sandy beach at Lampu Satu (14.39 kg/km2). This is due to the influx of fresh water in estuarial habitat, sandy beaches in Lampu Satu and Payum, and mangroves in Yobar, resulting in prawn emigration to areas with higher salinity in Bokem mangroves. It is also thought to be associated with increasing turbidity with a similar pattern in salinity and affecting the density of banana prawns.

Criminal Law Enforcement in Efforts to Eradicate Illegal Fishing in the Malacca Strait

The purpose of this study is to understand and review criminal law enforcement policies related to efforts to eradicate illegal fishing activities in the Malacca Straits, as well as understand and evaluate the criminal responsibility of illegal fishing actors in the Malacca Straits. This study uses normative legal research methods, with a statutory approach (statute approach), conceptual approach (conceptual approach), and case approach (case approach) in legal analysis. The research method used is qualitative, with descriptive problem solving procedures, and conclusions drawn through deductive reasoning. The results of the study reveal that Indonesia has established a criminal law enforcement policy to tackle illegal fishing throughout the Republic of Indonesia's Fisheries Management Area (WPPNRI) in accordance with the fisheries law. The Malacca Strait is one of the WPPNRI that has been established in Indonesia, especially WPPNRI 571. Therefore, the implementation of criminal law enforcement policies to eradicate illegal fishing in the Malacca Strait fully refers to the fisheries regulations in force in Indonesia. Furthermore, the fisheries law includes elements of criminal responsibility for illegal fishing actors in the stipulated WPPNRI. Given that the Malacca Strait is one of the WPPNRI.

Re-thinking Indonesian marine fisheries quota-based policy: A qualitative network of stakeholder perception at fisheries management area 718

As the largest archipelagic country, Indonesia has been unable to prioritize the ocean to improve its economy. Despite implementing various fisheries management approaches, Indonesia has consistently failed to establish the right policies. The Indonesian government's current breakthrough was to combine the ecosystem approach to fisheries management (EAFM) and quota-based fisheries management (QBFM). Policies that combine these two concepts are known as 'perikanan terukur' (measurable fisheries). The observation views the perspective of local stakeholders on this measurable fisheries policy. Fisheries management area (FMA) 718 was conducted as research areas while designed as industrial fisheries and national fish supply areas. FMA 718 is also represented by Merauke Regency (South Papua) and Aru Islands Regency (Maluku). The perception of 67 key respondents was modeled using qualitative network modeling. The results showed at least 28 initial variables related to the response to QBFM. The developed model indicated that local stakeholders had rejected this policy. The implications that emerged to implement this policy were to ensure the distribution of authority between layers of government. The gap between local and commercial fishermen must be resolved immediately. There is a need for community involvement in policy, including efforts to develop policies based on data and factual conditions.

Wave climate characteristics and effects of tropical cyclones on high wave occurrences in Indonesian waters: Strengthening sea transportation safety management

Tropical cyclones can cause bad weather and high waves that can endanger maritime activities, especially in the waters of Indonesia, which is a maritime country. Understanding ocean wave climate characteristics and the effect of Tropical Cyclones (TCs) on high wave occurrences is important, particularly to ensure the safety of fisheries activities in Indonesian seas. We aim to do so by focusing on Indonesia's 11 Fisheries Management Areas (IFMAs) using descriptive and inferential statistics. Wind and wave data were taken from the European Center for Medium-Range Weather Forecast (ECMWF), namely ECMWF Reanalysis v5 (ERA5) within the range of 42 years (1979–2020), whereas the TC data were from the International Best Track Archive for Climate Stewardship (IBTrACS). We found that significant wave heights (SWHs) in the inner seas are strongly related to monsoonal wind fields. The maximum SWH occurred in northern Indonesian seas during December–February (DJF), while occurring in southern and inner seas between June–August (JJA). The highest extreme SWH and probability of exceedance (PE) for SWH >2 m were found in IFMAs facing the open ocean, such as Malacca Strait, Western Sumatra waters, Southern Java waters, Natuna Sea, Sulawesi Sea, and Northern Papua waters. We found that TCs activity in adjacent Indonesian waters could increase anomalous SWH occurrences. Positive SWH anomalies ranged from 0.1 to 0.4 m and varied depending on TC location and season. TC that forms in the following areas increase the PE for SWH >2 m: (1) Bay of Bengal: Western Sumatra waters (March–May, MAM) around 20%; (2) Western Pacific Ocean: Northern Papua waters (DJF) around 5%; (3) Northeastern Indian Ocean: Western Sumatra waters (DJF) about 3%; and (4) Western and Northern Australian waters: Southern Java waters (DJF) about 20%. The results of this study can serve as an early assessment for investigating wave climate characteristics and identifying the areas in Indonesian waters that are most susceptible to the impact of TCs, particularly in IFMAs. These findings hold significant value for managers and policy authorities, such as the Ministry of Transportation and the Ministry of Marine Affairs and Fisheries of the Republic of Indonesia. They can utilize this information to develop measures aimed at reducing vulnerabilities among marine resource users, specifically fishers, and improving fishing vessel safety. Additionally, these findings can be utilized to enhance advance warnings and forecasts, enabling marine managers to implement strategies that minimize the impact of extreme events and increase resilience in the face of ocean and coastal disasters.

Effectiveness and conservation of marine fisheries management areas in Koh Rong, Cambodia

Fish is an essential food for Cambodians and plays an important role in food security. Fish is rich in protein, vitamins, and other minerals necessary for human health, particularly for pregnant women and children. On average, each person consumes about 52,4 kg of fish per year. Fishery communities are attracting national and international tourists for leisure activities, such as fishing, sightseeing in villages and mangrove forests, and coral diving. These activities have contributed to local livelihoods. Fishery management and conservation protect biodiversity and ensure food security. It requires a partnership with community fisheries, professional institutions, local authorities, development partners, and stakeholders and a mechanism for joint responsibility that includes collaboration, division of roles, encouragement, empowerment, and ownership. Smart patrols are a vital tool in preventing fishing crimes in the fisheries management areas of the Koh Rong archipelago and in increasing knowledge of management and the effectiveness of law enforcement. Community fisheries have been established and are fulfilling their essential role in managing the fisheries resources. The communities have been strengthened with support from the government and development partners, including financial and technical support. In the marine fisheries management areas and the community fisheries, to ensure effective management of the areas, there should be monitoring, evaluation, and research on coral habitats, seagrass habitats, mangrove sanctuaries, socio-economic conditions, fisheries governance and knowledge, and attitudes and practices.

The Framework Analysis of Small and Medium Fishery Industries in West Papua Province, Indonesia

West Papua's fishery resources are in fishery management areas 715 and 717 with a potential of 1,242,526 tonnes/ha and 1,054,695 tonnes/ha respectively. On average, most fishery products are marketed fresh and only 1.20% are in the form of further processing. Therefore, the analysis of small and medium fisheries industries’ (SMFI) development framework is needed to encourage small and medium fisheries enterprises to grow and be sustainable. The analytical framework is realized by considering the initial data consisting of household capacity of fishermen, product superiority, and maximum sustainable yield; data management and processing; support from legal policy; community-based institutions; and co-management arrangements.

STATUS PENGELOLAAN PERIKANAN SIDAT (Anguilla Spp.) BERDASARKAN PADA PENDEKATAN EKOSISTEM DI DAERAH ALIRAN SUNGAI (DAS) CIMANDIRI, JAWA BARAT

Anguilla spp. is a catadromous fish species that have high export value in supporting the livelihood and food source for the local community in the Cimandiri Watershed, West Java, which is involved in the Indonesian Fisheries Management Area - Inland Waters (WPPNRI-PD) 432. However, pressure on habitat and watershed ecosystems is leading to degradation due to anthropogenic activities is inevitable. This study aimed to determine the composite index of the seven domains and the eel-fishery management status performance based on the EAFM approach in the Cimandiri watershed. The research was carried out from April 2021–February 2022, using a quantitative method focused on testing theory by measuring research variables with numbers and analyzing data based on the findings in each domain. The ex-situ and in-situ data were collected through direct measurements and in-depth interviews with respondents. Subsequently, the composite scores of domains were calculated using flag modeling (multi-criteria analysis). The results highly likely indicated that habitat and social are the lowest-performance domains and require more attention for improvements. In general, the status of the eel fishery management using the EAFM approach in the Cimandiri watershed is fairly good. However, integration of multi-sectoral collaboration is highly needed through the development of effective co-management by maximizing the roles of the community to be further involved in planning and implementing the management actions of the Cimandiri watershed in the form of participative, community-based, toward sustainable use of the resources.
 Kata kunci: Eel, Cimandiri Watershed, EAFM, Co-management

Estimation of fish biomass around the Sangihe Islands waters based on the acoustic data and numerical model of spatial ecosystem and population dynamics

The Sangihe Islands is located in the Republic of Indonesia Fisheries Management Area (WPPNRI) 716, which has an area of about 52.5 million hectares. The potential productions for small and large pelagic fish in WPP NRI 716 are 332,635 tons/year and 181,491 tons/year, respectively, with utilization rates of 0.48 and 0.63. The dominant fish species caught were skipjack, mackerel, yellowfin tuna, and anchovies. In order to estimate fish biomass around the Sangihe Islands waters, acoustic data has been collected in several locations using a 120 kHz BIOSONIC DT-X echo sounder mounted on fishing vessels with purse seine gear. In addition, an analysis of the data from the results of the Spatial Ecosystem and Population Dynamics Model (SEAPODYM) from INDESO Project was also carried out. This model has a resolution of 1/12° and applied in Indonesian waters for 3 types of tuna, namely yellowfin, bigeye, and skipjack. Acoustic data showed that the largest fish biomass along the survey tracks was found at depths between 126 and 150 m, with a total biomass of 21,418 tons. Meanwhile, from the model results, it was found that skipjack biomass was the largest. The average biomass around the Sangihe Islands waters was around 1,340 tons.

Satellite-Based Ocean Color and Thermal Signatures Defining Habitat Hotspots and the Movement Pattern for Commercial Skipjack Tuna in Indonesia Fisheries Management Area 713, Western Tropical Pacific

Understanding the mechanisms that determine the critical habitat of commercial species is one of the significant challenges in marine science, particularly for species that inhabit the vast ocean worldwide. Previous investigations primarily focused on determining skipjack habitats without considering the feasible size for sustainable fisheries. To define habitat hotspots and movement patterns for decently sized skipjack tuna (≥50 cm) in Indonesia Fisheries Management Area (IFMA) 713, Indonesia, we examined the remote sensing of synoptic sea surface temperature (SST) and chlorophyll-a concentration (Chl-a) measurements with catch data from 2007 to 2016. A new skipjack tuna habitat model was developed based on the link between the key satellite-based environmental data and the best tuna fishery performance using a combination of generalized additive models (GAMs) and kernel density estimates. The findings reveal that feasible skipjack catch sizes were found in approximately 27% of total fishing grounds and were significantly captured in areas with a Chl-a of 0.15–0.28 mg m−3 and an SST of 29.5–31.0 °C, corresponding with an elevated skipjack habitat index (SHI). The habitat hotspots for the commercial skipjack were particularly produced by favorable Chl-a and SST, in association with Chl-a front and anticyclonic and cyclonic eddies, especially in October, which coincided with the highest skipjack catch per unit effort (CPUE). Skipjack distributions were mostly found within 10 km of favorable feeding habitats. They used the hotspot area as an indicator of their dynamics and movement pattern in the environment. The observed CPUEs cross-validated the predicted SHI values, suggesting that the model provided a reliable proxy for defining the potential habitats and the spatial movement of mature skipjack schools. Our findings have global significance for locating ecological hotspots, monitoring sustainable skipjack fisheries, and tracking skipjack migration, especially within the western tropical Pacific.

Capture Area Compatibility with Map of Fishery Potential Area Based on Chlorophyl-a and Sea Surface Temperature in Aru Sea Waters-Indonesia

The Republic of Indonesia's Fisheries Management Area (Wilayah Pengelolaan Perikanan Negara Republik Indonesia) marine waters is an area with high capture fisheries potential, reaching 20% of the national fish potential. Fishing is often hampered by the lack of information related to Fishing Potential Zones, resulting in reduced efficiency. The solution offered is to utilize geographic information systems (GIS) or remote sensing with aqua MODIS satellite images of chlorophyll-a and sea surface temperature as data for mapping potential fishing zones. The objectives of this research are to understand the operation of purse seines, analyze the influence of sea surface temperature and chlorophyll-a on purse seine catches, and determine the level of suitability of fishing areas with maps of potential fishing zones. To answer the objective, non-experimental based applied research was conducted with a case study approach, survey method and correlation approach to determine the effect of chlorophyll-a and sea surface temperature variables on catches. The tools used hardware, namely laptops and computers with the software needed research are SEADAS, SAGA, QGIS, Ms. Excel and SPSS. Data on the distribution of and chlorophyll-a used in the study are data from Aqua MODIS level 1x1 kilometer resolution downloaded on the page https://oceancolor.gsfc.nasa.gov/.
 As for the results of statistical testing, there is an influence of chlorophyll-a and sea surface temperature simultaneously and partially on the catch by giving an influence of 73.6%. With the distribution of chlorophyll-a concentration and sea surface temperature in the KM fishing area. The level of conformity of fishing areas with maps of potential fishing zones on fishing trips from December 2020 to April 2021 reached a percentage of conformity of 55.93% with a total catch of 209,360 Kg, indicating the selection of fishing areas by conventional skippers on KM XXX compared to the forecast of fishing areas using aqua MODIS satellite imagery remote sensing technology can be categorized as good even though it only relies on experience and information about fishing areas from other vessels.

Multiple-goal bioeconomic programming to address conflicting management objectives in Indonesian small pelagic fisheries

Decision-making in Indonesian fishery management with an ecosystem approach requires trade-offs between conflicting objectives. For small pelagic fisheries of Indonesia, this study addressed common decision-making problems in determining optimal levels of fishing effort adjustment and integrated management of fishery and fish processing objectives using multiple-goal bioeconomic programming models. In the effort adjustment, the analysis optimised among the conflicting ecological and economic objectives using the allocation of the effort across two of Indonesia’s Fisheries Management Areas (FMAs). An optimal fishing effort adjustment could increase fish stock biomass, fishery production, and fishery profit in both FMAs together. For managing the integrated fishery combining fishing and fish processing, the analysis determined the best-compromise solution to the conflicting objectives, while optimising the vessel size, the allocation of vessels within and beyond provincial jurisdictional waters, and the fish processing capacity. The result suggested not targeting increased employment as a fishery management objective to avoid increases in fishing pressure and the number of vessel workers that would lead to potential decreases in fisher family income. The programming models could be expanded to address the nation-wide issues of unbalanced fishing pressure and integrated fishery management by using an ecosystem approach to fisheries to sustain small pelagic fish resources while balancing ecological and human well-being.

Deteksi Kapal Penangkapan Ikan Menggunakan data Visible Infrared Imaging Radiometer Suite (VIIRS) dan data Vessel Monitoring System (VMS) di Wilayah Pengelolaan Perikanan Negara Republik Indonesia

The small pelagic fisheries are one of the most important fish resources for the Indonesian economy. One of the problems for the fisheries industry in Indonesia's is overfishing, along with advances in fishing technology that result in catching activities that exceed sustainable fishing rates and are not offset by good management. This research aims to analyze the integrated distribution of fishing vessels from VIIRS vessel detection data and VMS data in Indonesia's fisheries management areas. To support management efforts, studies on the distribution of vessels that are operating in Indonesian waters need to be known definitively. Currently, the monitoring of the distribution of fishing vessels in the Indonesian area is carried out using a vessel monitoring system. Apart from VMS, detection of fishing vessels can be done by utilizing remote sensing data from both active and passive sensors, namely through the Suomi National Polar-orbiting Partnership satellite which has a visible infrared imaging radiometer suite. This instrument has a day/night band capable of recording lights on the earth's surface, including fishing boats that use the light as a fishing aid. The fishing vessel detection method uses a combination of VBD data from VIIRS satellite imagery and fishing vessel VMS data. Based on the result, VMS matching with VBD is 26.04%, and based on the combination of VIIRS and VMS data, it is known that the area with the most ship distribution is in WPP-712