Utilization Of Fisheries Research Articles

Assessments of 12 Commercial Species Stocks in a Subtropical Upwelling Ecosystem Using the CMSY and BSM Methods

Twelve commercial species exploited in the eastern Guangdong and southern Fujian waters were assessed using the Catch-Maximum Sustainable Yield (CMSY) and Bayesian Schaefer Model (BSM) methods. The carrying capacity (k), intrinsic rate of population growth (r), maximum sustainable yield (MSY), and relative biomass (Bend/k and B/BMSY) were estimated. The current stock status was defined by B/BMSY and fishing mortality (F/FMSY). The results indicate that seven stocks were overfished or below safe biological limits (B/BMSY < 0.5 or F/FMSY > 1), two stocks were in a recovery phase (0.5 < B/BMSY < 1, F/FMSY < 1), and three stocks were under sustainable fishing pressure with healthy biomass, capable of producing yields close to the MSY (B/BMSY > 1, F/FMSY < 1). The stock statuses are consistent with previous studies on the utilization of pelagic fisheries in the eastern Guangdong and southern Fujian waters and with those assessments in other waters. The results of the assessments suggest that these stocks could be expected to produce higher sustainable catches if permitted to rebuild; thus, more effective and proactive management is needed in this upwelling fishing ground.

Effects of Fishery Utilization on the Physicochemical Index and Microbial Community Composition in Saline-Alkaline Water.

Fishery utilization of idle saline-alkaline water resources offers various benefits including reducing surrounding soil salinity, improving the ecological environment, increasing arable land area, and providing economic advantages to the fishery industry. However, for decades, the characteristics and regulatory mechanisms of microbial communities that affect fishery utilization have not been clear, which restricts their application. In this study, high-throughput 16S rRNA amplicon sequencing was employed to analyze the bacterial community in these water resources. The sequencing yielded high-quality sequences (2,765,063), resulting in the identification of 18,761 bacterial operational taxonomic units (OTUs). Analysis revealed that the type of saline-alkaline water had a more significant influence on the bacterial community compared to seasonal variations within the aquaculture period. The Chao index for saline-alkaline ponds (ASW) was significantly lower (P < 0.05) than for still saline-alkaline water (SSW) and flowing saline-alkaline water (FSW), while the Shannon index for ASW was also significantly lower (P < 0.05) compared to FSW. When comparing ASW to nonaquaculture saline-alkaline water, a decrease in Proteobacteria to 26.87% was noted, particularly α-proteobacteria and γ-proteobacteria, accompanied by a rapid increase in Actinobacteria and Cyanobacteria to 28.60%. Networkx analysis further revealed that ASW significantly increased competition and amensalism from secondary saline-alkaline water microorganisms, resulting in a more solitary bacterial community composition as an adaptive strategy to cope with intense environmental pressures. Key bacterial species such as Pseudomonas, Hydrogenophaga, and Flavobacterium were found to be involved in hydrogen-cycling, nitrogen-cycling, and carbon-cycling, respectively, with all three exhibiting high abundance in FSW. Consequently, FSW demonstrates significant advantages in biogeochemical cycling, pollutant degradation, and the utilization of indigenous probiotic bacteria. Although the surface of abandoned secondary saline-alkaline land was covered with white salt particles, the fishery utilization of saline-alkaline water with low salinity levels (4.0-5.5), and the presence of nitrate and phosphate were identified as primary determinants of bacterial community composition. Nevertheless, a comparison of coastal high-salinity ponds indicated that salinity still selectively affects bacterial communities to some extent. Overall, our study provides valuable insights into the microbial regulation of nitrite during saline-alkaline water aquaculture, thereby aiding in the efficient utilization of secondary saline-alkaline water resources for fisheries.

Seabed Sediment Classification using Multifrequency Backscatter

Seabed sediment serves as an important metric for assessing marine ecosystems. Different sectors, including the development and utilization of marine resources, marine engineering, environmental research, marine fisheries, and maritime navigation safety, all depend on the classification and identification of different forms of seabed sediment. Hydrographic surveys employing Multibeam Echosounders provide information that can be used to categorize the types of seabed sediment. The data acquired during the hydrographic surveys using Multibeam Echosounders include bathymetric data and backscatter data. The backscatter data is obtained from the use of Multibeam Echosounder equipment for bathymetric data acquisition. The backscatter data from Multibeam Echosounders can be utilized for determining the classification of seabed sediment as well as for identifying seabed features. This backscatter data represents the types of sediment on the seafloor and can be used for seafloor profiling and acoustic backscatter analysis to determine the several kinds of seafloor sediment. This study uses multi-frequency mosaic backscatter data and an Artificial Neural Network (ANN) approach to classify the different types of seabed sediment in the area of Benoa Port in Bali Province. The research aims to produce a distribution map of sediment types in the study area. A training accuracy of 55% and a testing accuracy of 66% were obtained from the DNN modelling. Three out of six sediment types were identified based on these accuracy results: silty sand, gravelly sand, and sandy silt with gravel corals. According to their distribution, gravely sand had the smallest distribution (5%), while silty sand had the biggest (77%).

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 Impact of Covid-19 on Patterns of Utilization of Capture Fisheries at Cirebon

The purpose of this study analyze the impact of Covid-19 on input factors and output factors on the pattern of utilization of capture fisheries. This research was conducted in 2020 in Cirebon Regency. The methodology used quantitative descriptive. The results of the analysis indicate, first, the impact of COVID-19 on input parameters has not changed, such as fishing fleets, trips, fishing ground, crew members, and operational costs. Some changes only occur in certain commodities. For example, in crab fishermen, they adjust their fishing gear on commodities sold for the domestic market. Previously, they used traps to catch crabs. Since the Covid 19 pandemic, they have used rampus to catch small pelagic fish. Second, in TCT commodities, the variables that change are mainly the output parameters, namely production volume, price, and revenue. The impact of covid 19 was felt during March-May 2020, which was when the PSPB was implemented. There was a decrease in production in 2020 compared to the previous year. It is hoped that the government will increase its cold storage capacity, so that if there is a lockdown in the export destination country, the output from fishermen can be temporarily accommodated in cold storage.

Exclusive Economic Zone: Contemporary Law of the Sea Fisheries Regulations

The sea as an important area in a country must be able to be maintained both for state sovereignty and respect for sovereign rights. This is regulated in the jurisdiction of the territorial sea regime which applies sovereignty and the EEZ regime which applies sovereign rights. This research analyzes the background of agreements on international regulation of the sea and the utilization of fisheries which are also regulated in international law. The current international law of the sea only strictly regulates regional regimes and territorial jurisdiction, while the nature of fisheries cannot follow this. This research method is normative where international fisheries law arrangements still do not exist. The vacuum of international norms is only filled by weak international agreements and their implementation cannot be forced. The history of the current international law of the sea shows that the basis of the agreement is only related to territory and respect for maritime law in the form of international customs. It needs to be understood that the sea as a natural area must be used in a sustainable manner and also must not violate, so the marine potential, especially fisheries, needs to be agreed with strict sea area regulations and optimal utilization within the framework of the welfare and sustainability of marine ecosystems.

Pengawasan dengan Metode Smart Patrol di Kawasan Konservasi Taman Wisata Perairan Gili Balu

The management of conservation areas includes surveillance and monitoring activities (patrols) carried out by supervisory community groups (pokmaswas) using the Smart Patrol method. Patrol activities aim to determine the utilization pattern and level of zoning compliance in the marine conservation area of Gili Balu Aquatic Tourism Park. Patrol activities are carried out in 2021 as many as 8 times with an average of 1 time every month. The average time used to make observations ±5 hours. During the activity, 32 points of utilization of capture fisheries were found by 36 fishermen. The composition of the fishing gear used is 78% fishing line, 10% drift gill nets, 9% squid angling, the remaining 3% arrows. Fishermen's catches are dominated by soft-skin animals (81%), small pelagic fish (16%), and reef fish (3%). The pressure level of TWP Gili Balu utilization is relatively high with the highest value found on Belang Island, which is 32 people per 4 km2. The compliance rate in the core zone is relatively high with a value of 81% and falls into the excellent category, as well as in the utilization zone it is quite high at 42% and belongs to the category of quite good. The level of knowledge or utilization of the Gili Balu TWP area is included in the sufficient (moderate) category, where 41% of users know about the existence of the Gili Balu TWP conservation area and 59% of people who do not know the existence of the Gili balu TWP conservation area and the rules in it. Pokmaswas who are actively involved in surveillance and monitoring activities are Pokmaswas Liang Kuru of Senayan village, Pokmaswas Bua Lawah of Poto Tano village. However, it is still necessary to carry out regular supervision and monitoring at locations that are prone to zoning violations and socialization related to the existence of the Gili Balu TWP conservation area and the zoning rules in it.

Fishery Characteristics and Management in the Floodplain Lakes of Tana River delta, Kenya

Tana River delta floodplain is maintained through a dynamic balance revolving around frequency, extent, and flooding duration. These seasonal and annual flooding variations strongly affect the floodplain communities' fisheries and livelihoods. In the delta, fishing is an important traditional source of livelihood, practiced alongside local agrarian livelihoods such as shifting cultivation and livestock keeping. Fishery utilization and management characteristics in the Tana River delta floodplain lakes are not well documented. This study investigated the characteristics and management of small-scale fisheries in the Tana River delta floodplain lakes. Information relating to past flooding events, fishery characteristics, prevailing regulatory regimes, and the impacts of seasonal flooding were collected using field observations. We collected the information at awareness workshops and key informant interviews between June and September 2018, which covers a significant flooding period of that year, and August 2021, a relatively dry period in the delta. We collected the information from communities living around floodplain lakes in Tarassa and Ngao in the southern part of the delta and Tamaso and Lango la Simba areas in the eastern part of the delta. Results indicate that fishery resources are more diverse during flooding (new species recruitment, presence of spawning, breeding, and foraging sites). The community does fishing all year round, and some part-time practice fishing to supplement shifting cultivation and dry season grazing that are greatly affected by periodic flooding. Floods were crucial in enriching floodplain lakes with diverse fish species. Women are involved in fish trading, acquiring fish primarily within their lineage. Fish is mainly sold in local markets due to poor preservation leading to low-value addition. This study recommends a comprehensive value chain analysis to improve it. Fishing communities around the villages are also most vulnerable to climate change because fishery resource governance needs strengthening, and most households are not involved in resource management. Besides, fishers have limited livelihood options due to lacking skills, technologies, and knowledge to undertake climate adaptation-related decisions. We recommend desilting floodplain lakes and improving connectivity with the main river channel. Additionally, an urgent need is to institute a co-management system to bring together different user groups around these floodplain lakes. Keywords: Fisheries, Flooding, Livelihoods, Floodplain lakes, Governance, Tana River delta DOI: 10.7176/JEES/13-2-02 Publication date: March 31 st 2023

Utilization and Management of Pelagic Fisheries in West Sumbawa Regency, West Nusa Tenggara Province

Kabupaten Sumbawa Barat (KSB), Nusa Tenggara Barat Province has potential fishery resources. Based on Permen KP No.18 of 2014 concerning the Republic of Indonesia State Fisheries Management Area (WPPNRI), KSB marine is included in WPPNRI 573. The purpose of this study was to determine the sustainable potential of pelagic fisheries and their level of utilization. This research was conducted in KSB from January to November 2022. The research method used was a field survey method and a descriptive method. The results of the study showed that the relationship between effort and CPUE for large pelagic fish obtained a linear equation y = 12.067x + 277.6 with R2 = 0.1785. This equation explains the positive relationship between production and effort, meaning that fishing gear affects the production of large pelagic fish. the optimum effort value is 1674.90 trips per year and the maximum sustainable catch is 232,459.1 kg per year. Effort relationship with CPUE of small pelagic fish obtained a linear equation y = -18.575x + 11512 with R2 = 0.2817. This equation explains the negative relationship between effort and catch. This shows that fishing gear is not the main factor affecting the amount of production. the optimum effort value is 106917.700 trips per year and the maximum sustainable catch is 992998.139 kg per year. The utilization rate value is 2.049%, with an effort level value of 0.001%. This study concludes that the potential and level of utilization of pelagic fisheries in West Sumbawa Regency are still below the sustainable potential.

Post-Covid-19 Tourism In Bali: The Economy And Eco-Tourism

The Covid-19 pandemic has spread and spread globally no less than 218 countries have been exposed, including Indonesia. Tourism is one of the sectors most affected by the Covid-19 pandemic. This pandemic has forced the country to carry out social restrictions and prohibit tourist visits between regions and from abroad. The real impact that can be seen is that workers in this sector experience a decrease in income, for this reason it is necessary to know the condition of tourism after the pandemic in Bali. In this study using a narrative review method. The result is that the development of tourist villages has contributed to community empowerment as tourism actors. Tourism and culture is an activity of exchanging information and symbols contained in it, such as traditions, arts, food, and other identities contained in the place to be enjoyed by every tourist. The Bali Provincial Government issued a strategic policy in the form of Bali Governor Regulation Number 99 of 2018 concerning Marketing and Utilization of Agricultural Products, Fisheries and Local Bali Industries.

STRATEGI PENGEMBANGAN MINAWISATA DI TELUK SAWAI KABUPATEN MALUKU TENGAH

The waters of the bay are known among domestic and foreign tourists as a tourist destination. Various tourist objects and attractions that offer beautiful beaches, underwater diving, waterfalls and natural cave holes are in this region. With the increasing activity of tourism and local community activities, it is certain that in the next few years almost all of the land will be used for various development activities, so the need for efficient utilization of coastal and marine resources, especially the utilization of fisheries and tourism potentials by developing the concept of minawisata in the area. The research purpose was formulating the development strategy of minatourism in Sawai Bay. The study was conducted for 3 months from September to November 2020. The data collection used primary and secondary data as well as purposive sampling. The data analysis method SWOT and AHP. The results showed that The priority strategies for developing minatourism in Sawai Bay, Central Maluku Regency; Development of quality human resources in the community; Increasing public awareness around the Sawai Bay area of ​​the importance of protecting fisheries and marine environmental resources; Developing local community expertise to support minatourism activities; Increasing tourism facilities and infrastructure; Increase the promotion of online/offline minawisata; Increase cooperation between managers and investors; and Improve MCS (monitoring, controling, survellance) (0.0058).

Distribution and community structure of fish in relation with water physico-chemical parameters of floodplain rivers in the Alitash National Park, Ethiopia

AbstractRiverine ecosystems are highly exposed to different forms of human activities and fish distribution in such habitats can be affected by different features of water. Tributaries of the Abbay and Tekeze Basins are supporting all life requesting activities in Ethiopia. Fisheries of these habitats are also the mainstay of livelihoods. However, brutal human activities are affecting these ecosystems and the fish therein. This study was thus undertaken to examine fish distribution and community structure in relation to water parameters in Ayima, Gelegu and Shinfa Rivers. 2719 fish specimens identified into 43 species were sampled using gillnets, cast nets and electro-fishing on a seasonal campaign. Based on frequency of occurrence (%FO), 5 species fell in the category of ‘euconstant occurrence’ or their FO was ≥75%, while many species were laid in the ‘constant occurrence’. Among others, site depth, total phosphorus, dissolved oxygen and river channel diameter were key environmental factors determining fish community structure. Similarity percentage produced an overall average Bray-Curtis dissimilarity of 60.8% between the fish communities of the three rivers. The final model accounted for 77.2% of the total variance in fish composition, and all canonical axes were significant (Monte Carlo test 499, p = 0.002). Generally, this study was conducted in areas where no ecological studies are undertaken and the results obtained from this study could be important for sustainable utilization of Ethiopian fisheries.

Microbial Community and Geochemical Analyses of Saline-Alkali Water for Understanding the Roles of Fisheries Utilization

Microbial Community and Geochemical Analyses of Saline-Alkali Water for Understanding the Roles of Fisheries Utilization

Utilization of fish resources in the Indonesia’s Exclusive Economic Zone within the Fishery Management Area of 573: Case study in Rote Ndao Regency

The United Nations Convention on the Law of the Sea (UNCLOS 1982) affirms that the government has sovereign rights, jurisdiction, and obligations in Indonesia’s EEZ. Indonesia has an interest in protecting sovereign rights and increasing state revenues in the waters of the Exclusive Economic Zone (EEZ). That sovereign right is to use fishery resources responsibly for the benefit of the nation and society as a whole. The sole purpose of this qualitative research is to optimize fisheries utilization in the Rote Ndao Regency whose waters include the Fisheries Management Area of 573 (FMA-573) in the EEZ. The analysis had been carried out with a case study approach and then descriptively elaborated. The results showed that: 1) the use of fisheries in FMA-573 was carried out by traditional fishermen (using vessels ≤10 Gross Tonnage/GT) and fishermen using vessels >29 GT; 2) supervision is still needed for the improvement of ships and human resources; 3) there are still violations of territorial waters by traditional Indonesian fishermen. The policy recommendations that must be carried out by the government are: 1) encouraging local fishermen to catch fish in the FMA-573 area by providing stimulus for ships and fishing gear; 2) allocate budget to purchase a new fleet of ships and add supervisors; 3) increase the number of fishery instructors to foster and socialize the boundaries of Indonesia’s EEZ with Australia.

Valuasi ekonomi Setu Pedongkelan, Kota Depok, Jawa Barat (pemanfaatan sumber daya perikanan)

This study aims to identify the types of utilization found in Setu Pedongkelan and estimate the economic value of Setu Pedongkelan through fisheries utilization. The use of fisheries in Setu Pedongkelan is capture fisheries. The data used in this research are primary data in the form of survey results, interviews and online questionnaires as well as secondary data obtained from the documentation archive. The method used in this research is the market price method. The results of the study found that the types of utilization found in Setu Pedongkelan include direct use such as fisheries, irrigation and recreation. In addition, there are also indirect uses such as places for biota to find food, flood control, spawning, conservation and places or research facilities. This research also gives the result that the economic value of Setu Pedongkelan from fisheries utilization is IDR 2,472,960,000.

Factors influencing the sustainable utilization of artisanal fisheries: A case of west point, Liberia

Self-governance in which local actors can communicate and develop rules of reciprocity leads to sustainable utilization of resources such as fisheries. This study uses a Social-Ecological System approach to investigate the self-organized informal governance regime of the artisanal fisheries in West Point, Liberia. A slum community of 1249 full-time fishermen. The population was stratified according to fishing methods and a sample size of 303 fishermen was randomly selected using a proportion allocation method and data was analysed using descriptive statistics. Findings showed that current catch assessment and fishing effort represent only 4% of the actual production of the artisanal fishery in Liberia. The study also revealed that the self-governing regime doesn’t regulate gears and methods. Rules developed are mainly social-economic. Environmental rules that protect the resource base are lacking. Factors influencing the sustainable use of the artisanal fisheries also included the use of beach seine, monofilament nets, 41.6%, and monofilament lines, 11.2%. Other factors were conflicts and the sources of conflict identified as competition for the same fish species and fishing grounds. The study concludes that tailoring rules that protect the resource base into the self-governance regime will lead to the sustainability of the resource system.

Business sustainability of fisheries utilization in Padang

Padang is one of the centers of economic growth in the West Coast of Sumatra. Its position in the coast makes Padang as the entrance of fish resources to fulfil the needs of fish in Padang and its surrounding areas. The purpose of this study is to analyze the level of utilization of fish resources in Padang, especially from the aspect of business sustainability. The data analysis was done descriptively describing the performance of the fishing business that landed fish in Padang. The results of the analysis show that various types of fishing gear that landed fish in Padang still provide business benefits so that business sustainability continues. The availability of fish landing facilities and better fishing needs is expected to increase the efficiency of fishing effort and improve the quality of the fish catch landed so that it has a higher selling value.

Sustainability of pompano production in the waters of North Aceh

Pompano fish production from 2009 to 2018 often fluctuated with the tendency to decrease in the last two years. The highest production happened in 2006 reaching 50 tons per year while the lowest production reached 24 tons in 2013. This present study aims to analyze the status of pompano resource management in the actual condition, Maximum Sustainable Yield (MSY), Maximum Economic Yield (MEY), and Open Access (OA) as well as to identify the level of resource utilization of pompano fish in North Aceh waters in accordance to the allowable catch. The study found that pompano fisheries resources in the MSY regime produced 54.49 tons per year and the level of effort was 1,301 trips with the profit of Rp 468,714,567 per year. In the MEY regime the catch reached 48.22 tons with the catch effort of 860 trips and the profit gained of Rp 636,447,069 per year. The management in the MEY regime is more efficient than that in the MSY. The level of pompano resource utilization is in the status of fully exploited with a percentage value of 92%. The utilization of pompano fisheries may still be done under supervision to avoid damage to fish resources and the environment.

Community-based ecosystem management (CbEM) of Arial Beel at Munshiganj District in Bangladesh by integrating MIMES model

The purpose of this study is to assess the current state of community-based ecosystem management (CbEM) of at Munshiganj District in Bangladesh by applying Multiscale Integrated Model of Ecosystem Services (MIMES) approach. Both primary and secondary data were collected through questionnaire survey, focus group discussions (FGD) and content analysis from various sources. The SWOT (strength, weakness, opportunities, and threat) analysis are applied to prioritize the most important strength, weaknesses, opportunities, and threats in Arial Beel ecosystem services. Besides, the DPSIR framework was also applied for conceptual framework to assess the effects on ecosystem services. The study outcome reveals that all ecosystem services (ES) have high importance to the respondents in every sphere of life. The MIMES model analysis was shown that easily accessible and pleasant climatic conditions were the strength whereas funding problems and less private input on agriculture were identified to be the weakness. Fisheries utilization and the huge availability of raw materials were found to be opportunities. On the other hand, over-harvesting of the natural resources and increasing, use of fertilizer/pesticides in agricultural land were found to be the main threat for ecosystem services. Also, the DPSIR model framework gives a conceptual idea about the driving forces, its pressure, its current state, impact, and responses of the ecosystem services, respectively. Finally, this paper shows some aspects of community perception of ES which have the potentiality to generate knowledge to protect the services of the wetland.

KAJIAN ASPEK TEKNIS PERIKANAN GILLNET BERBASIS EAFM (ECOSYSTEM APPROACH TO FISHERIES MANAGEMENT) DI PERAIRAN DUMAI

The local government law regulated the management of 0 – 12 miles waters carried out by the province so that fishermen can operate their fishing gear without differentiating districts. Catch fishing was not limited to one kind of fishing gear and it caused the increasing of fishing capacity. The limited area of fishing with the distance of 2 miles from coast can caused fisheries utilization resources was not balanced. Therefore this study needed to be conducted to assess the status of development of gillnet fishing activities in Dumai waters. Data was collected by conducting interviews in the form of: fishing units, selectivity, sustainability of function and size of fishing vessel with legal documents, and modification of fishing gear. The data results based on 5 fishing technical aspects explained that the fishing utilization of gillnet still could be developed. However, the data of fishing vessel documents have to be well recorded according to the reality so that government could develop the responsible fishing activities.