Marine Fishery Resources Research Articles

Fine spatio-temporal prediction of fishing time using big data

Overfishing, bycatch, and other anthropogenic threats may lead to the destruction of fragile habitats and substantial losses of marine life. Marine fishery resources can be protected by adjusting fishing intensity and establishing marine reserves. Currently, China adopts the closed fishing season management approach to protect traditional fishing grounds, where fine spatio-temporal prediction is essential to efficiently supervise the wide scope. Fishing vessel behaviors reflect fishers’ experience as well as the information provided by fish detection radar, while the fishery resource distribution is relevant to the marine environment. In this study, we identified fishing vessel behaviors (gillnets, trawls, purse seines, and abnormal behaviors) and qualitatively assessed and predicted fishing time of different fishing vessel behaviors to search for high intensity fishing operation areas by constructing a time-space prediction model. The model was based on big data of fishing vessel automatic identification systems and3 the marine environment, and was verified in the East China Sea. The prediction results generally corresponded with the distribution of traditional fishery resources in the East China Sea and the fishing efforts provided by the Global Fishing Watch. This model can provide an accurate and effective refined fishing vessel operation time prediction, and benefits fishing management and fishery resources protection.

S-BESE: Strategy for Improving the Quality of Life for Coastal Area Communities in West Kalimantan

The coastal area of West Kalimantan has a wealth of marine and river fishery resources that have the potential to be utilized optimally, including fishing, conservation, port activities, marine cultivation, coastal tourism, and water. Various problems in coastal areas that need to be prioritized to provide solutions include the occurrence of illegal fishing, damage to coral reef ecosystems and mangroves, coastal abrasion, not yet optimal development of ponds where utilization only reaches 40% of their potential, natural disasters which result in increased poverty and ecosystem damage, as well as the growth of corruption and injustice. The number of people living in poverty has been steadily increasing at an average rate of 6.86% over the past three years, reaching 353,350 individuals in 2023. This research aims to develop coastal areas, creating local economic development innovations to reduce poverty, unemployment, and inequality and preserve natural resources. The method developed in this study was carried out descriptively and qualitatively by developing an in-depth analysis through SWOT. The results provide solutions for improvements and innovations, which include implementing a blue economy by utilizing the modernization of fishing gear, developing a paradigm shift from land to water resources, and producing garbage filters in rivers so they do not wash away into the sea. This study will improve the quality of life economically and socially while maintaining the ecology in coastal areas.

Proximate Compositions and Fatty Acid Profiles of Raw and Processed Holothuria polii and Holothuria tubulosa from the Aegean Sea

Sea cucumbers have become a highly valuable fishery product, and therefore the determination of their proximate compositions and fatty acid profiles are useful indicators of their physiological status and nutritional value. Thus, various raw and processed products, such as raw, dried, frozen, boiled, and salted Holothuria polii and Holothuria tubulosa that were collected from the Aegean Sea were analyzed. Although there were some notable differences in the proximate and fatty acid profiles between the two species and among the various processing forms, both H. polii and H. tubulosa had a high nutritional value. They were rich in proteins (up to 68.5% in the dried form), and although their lipid fraction was low (0.3–3.9%), it was characterized by very high levels of arachidonic acid (19.1–30.9% of total fatty acids) and eicosapentaenoic acid (8.5–15.7) that play vital roles in human growth, development, and health. In addition, their n-3/n-6 fatty acid ratios were within the recommended ranges, while their low Atherogenic and Thrombogenic indices and high Hypocholesterolemic index denote their high protective role against coronary artery disease. The provided information sheds light on the high nutritional value of this important marine fishery resource and provides valuable information for its preservation and processing. This information could also help policy makers, stakeholders, and the public to recognize the importance of this valuable fishery resource for human nutrition and to adopt preventative measures toward its sustainable exploitation.

A New Workflow for Instance Segmentation of Fish with YOLO

The application of deep-learning technology for marine fishery resource investigation is still in its infancy stage. In this study, we applied YOLOv5 and YOLOv8 methods to identify and segment fish in the seabed. Our results show that both methods could achieve superior performance in the segmentation task of the DeepFish dataset. We also expanded the labeling of specific fish species classification tags on the basis of the original semantic segmentation dataset of DeepFish and completed the multi-class instance segmentation task of fish based on the newly labeled tags. Based on the above two achievements, we propose a general and flexible self-iterative fish identification and segmentation standard workflow that can effectively improve the efficiency of fish surveys.

Alternative splicing plays a nonredundant role in greater amberjack (Seriola dumerili) in acclimation to ambient salinity fluctuations

Alternative splicing (AS) is an important post-transcriptional mechanism for adaptation of fish to environmental stress. Here, we performed a genome-wide investigation to AS dynamics in greater amberjack (Seriola dumerili), an economical marine teleost, in response to hypo- (10 ppt) and hyper-salinity (40 ppt) stresses. Totally, 2267–2611 differentially spliced events were identified in gills and kidney upon the exposure to undesired salinity regimes. In gills, genes involved in energy metabolism, stimulus response and epithelial cell differentiation were differentially spliced in response to salinity variation, while sodium ion transport and cellular amide metabolism were enhanced in kidney to combat the adverse impacts of salinity changes. Most of these differentially spliced genes were not differentially expressed, and AS was found to regulate different biological processes from differential gene expression, indicative of the functionally nonredundant role of AS in modulating salinity acclimation in greater amberjack. Together, our study highlights the important contribution of post-transcriptional mechanisms to the adaptation of fish to ambient salinity fluctuations and provides theoretical guidance for the conservation of marine fishery resources against increasingly environmental challenges.

Impact of physical and attention mechanisms on U-Net for SST forecasting

Sea surface temperature (SST) prediction is a subject of great significance to the marine environment and human society. Changes in SST not only impact marine ecosystems and fishery resources but also trigger extreme weather events and disastrous consequences. Therefore, the precise prediction of SST is essential to avoiding these problems. Although numerous data-driven SST prediction models have emerged in recent years, these models are characterized by a lack of physical mechanisms related to sea temperature changes as well as insufficient generalization capabilities and interpretability. In our work, attempts were made to integrate physics-related convection phenomena into deep learning models, and traditional deep learning models were improved by incorporating time and space attention modules. The results of a series of experiments showed that the incorporation of physical mechanisms enhanced the performance of data-driven models. Furthermore, attention mechanisms were similarly helpful, of which temporal attention proved to be more important. The modules proposed in this work also improved the baseline model’s accuracy by 22%. In addition, seven-day SST predictions were carried out for the world’s five major fishing grounds. The results demonstrated that the application of transfer learning strategies yielded superior performance, further improving prediction accuracy by 1%–5%.

A sustainable blue economy: blockchain and internet of things integration in tourism villages

Coastal areas have a wealth of marine and river fisheries resources that have great potential to be developed. This potential is utilized by various parties to make utilization efforts including fishing activities; conservation; ports; and marine cultivation; and coastal and aquatic tourism. Problems that currently occur in coastal areas include: (a) illegal fishing, (b) damage to ecosystems in coastal and marine areas, (c) not optimal utilization, (d) unsustainable development, (e) leakage of development due to corruption and injustice. The research methodology used is descriptive and qualitative research with framework analysis, which means framework analysis techniques. This analysis technique is carried out by conceptualizing the system through a structure that describes the connection between one variable and another in a systematic and detailed manner. The findings of this study provide innovative solutions for the application of financial and marketing technology through blockchain and the Internet of Things (IoT) can increase the productivity of fishermen, internal control, financial transactions, and reliable marketing strategies in helping business entities run their business processes. The management of regional potential independently and integrated can be collaborated through community empowerment and the role of village government through village-owned enterprises (BUMD) based on Sharia cooperatives in villages in coastal areas of Indonesia. So that the productivity of fishermen and government agencies in tourist villages can increase.

Contribution and Prospect of Marine Fisheries in the Economy of Bangladesh and Sustainable Blue Economy Challenges: A Review

Marine resources of Bangladesh are abundant, both in terms of huge sea area and its biological richness. The marine water area supports a large number of commercially important fin fish, mollusks, crustaceans, and seaweeds, offering significant economic potential due to their diversified use and high demand in the international market. Therefore, the current review comprehensively examines both the contribution and potentials of marine fisheries resources to the economy, as well as the challenges involved in marine fisheries sectors in attaining a sustainable blue economy in Bangladesh. The study revealed that, the marine fisheries plays an important role in national economy and has huge prospect in employment generation and ensuring food security of Bangladesh. The expansion of mariculture and effective utilization of marine resources will open a new window for the economic development of Bangladesh. Marine fisheries production of Bangladesh has increased over the last two decades, but its relative share in total fisheries production has declined. Despite being rich in marine living resources, commercial mariculture has been developed only for shrimp, prawn, and mud crab. Challenges hindering mariculture expansion includes limited research, technological deficiencies, inadequate skilled workforce, underdeveloped domestic seafood markets, and financial constraints. Concerted efforts including exploring new fishing grounds, conducting stock assessments, implementing scientific management strategies, enacting a national marine fisheries policy, enforcing legislation, and establishing robust surveillance and monitoring mechanisms are required to foster a sustainable blue economy in Bangladesh.

Transversal policy between the protection of marine fishery resources and fisheries subsidies to address overfishing in Indonesia

If the Indonesian Government continues to provide harmful subsidies to its fishing industry, then the occurrence of overfishing, which leads to the overfished and destruction of marine ecosystems, is an inevitable consequence. Thus, eliminating fishery subsidies that exert detrimental effects on aquatic life is imperative for the government. Unfortunately, Indonesia frequently implements social protection in the form of a subsidy policy to support fishing activities, particularly those undertaken by small-scale fisheries. Upholding and preserving the sustainability of marine fishery resources is incumbent upon the government by implementing marine protection policies. Therefore, the policy to protect marine fishery resources and fishery subsidies needs to be convergent. The study aims to analyse how Indonesia formulates a transversal policy and a coherence strategy between the protection of marine fishery resources and subsidies to support fisheries. The methodology involves a descriptive and analytical legal examination that identifies two policies and elaborates efforts to protect marine fishery resources and support fishermen in achieving better lives. The objective is to determine the interdependent functions of the protection of marine fishery resources and subsidy policies to address overfishing in Indonesia.

Multifunctional fish-skin collagen-based hydrogel sealant with dual-dynamic-bond cross-linked for rapid hemostasis and accelerated wound healing

Collagen (COL) is the most widespread functional protein. Designing and developing dual-dynamic-bond cross-linked COL adhesive hydrogel sealants with multifunctional is highly advantageous for achieving a superior wound closure effect and hemostasis. In this study, we developed hybrid hydrogels consisting of fish-skin COL, oxidized sodium alginate (OSA), borax and polyvinyl alcohol (PVA) to enhance full-thickness wound healing. The hydrogels were furnished with first-rate self-healing capabilities through the dual-dynamic-bond cross-linking of dynamic Schiff base bonds (COL-OSA) and diol boric acid bonds (OSA-borax) with reversible breakage and re-formation. Moreover, the incorporation of PVA stimulated the formation of hydrogen bonds in the system, bolstering the stability of the hydrogel framework. The prepared hydrogel manifests self-healing, injectability, multifunctional adhesiveness and biodegradability. In vivo assessment of the hemostatic capacity of COSP20 hydrogel was superior to gauze both in the mice liver injury model and mice tail amputation model. In addition, a full-thickness skin wound model in mice revealed that the COSP20 hydrogel facilitated faster wound closure by accelerating reepithelialization, COL deposition and angiogenesis. These findings illustrate the potential of hybrid fish-skin COL-based hydrogels to enhance wound healing and promote rapid tissue repair, and provide new possibilities for the effective utilization of marine fishery resources.

Evaluation of the status of marine fishery resources of Tamil Nadu, India using surplus production models

Evaluation of the status of marine fishery resources of Tamil Nadu, India using surplus production models

The cooperative management of internationally shared fish stocks in a world of instability

Internationally shared fishery resources account for one third of commercially exploitable marine fishery resources. This paper analyses the economic management of these shared resources, with the aid of case studies; doing so through the lens of game theory. The relevance of the management of these resources to strong individual user rights at the national (entity) level is straightforward. Ineffective management of the resources at the international level will undermine national user rights schemes based upon these resources. The management of different classes of internationally shared fish stocks is threatened by several forms of instability, with the most important of these being shifting and unpredictable zonal attachments, and free riding. Progress is being made, with one of the cases studies showing how a seemingly intractable and devastating problem of free riding, which threatened national user rights based upon the relevant resource with destruction, has been fully overcome.

Analysis of Compliance Level of Fishing Activities In The Natuna Sea

Illegal fishing in Indonesian territorial waters, especially by foreign fishermen, has harmed the Indonesian state financially, because it has contributed greatly in reducing productivity and catches very significantly. It has has also threatened the sustainability of the utilization of Indonesia’s marine fishery resources. Economic losses due to IUUF are not only in the form of state income which reaches the range of Rp. 30 trillion per year, but also the loss of opportunities to utilize fish resources of around 1 million tons of fish each year that can be caught (harvested) by Indonesian fishermen, and what happens is in fact stolen by foreign fishermen. entering Indonesian waters. Foreign fishermen who often enter Indonesian waters, among others, come from Thailand, Vietnam, the Philippines, and Malaysia. To prevent and overcome IUUF activities, one of the steps taken by the Ministry of Maritime Affairs and Fisheries (KKP) of the Republic of Indonesia through the Directorate General of Supervision of Marine and Fishery Resources (DITJEN PSDKP) is to supervise fisheries such as fishing activities in the fisheries management area of ​​the Republic of Indonesia. Supervisory implementation is carried out by the Technical Implementation Unit (UPT) PSDKP. UPT Directorate General of PSDKP in handling its duties is supported by the Marine and Fishery Resources Supervision Unit (PSDKP Satker) and Marine and Fishery Resources Monitoring Post (PSDKP Post) spread throughout Indonesia. In carrying out its duties, the Fisheries Supervisory Vessel may stop, inspect, carry, and detain ships suspected of violating the law to the nearest port for further processing. In addition, based on Law No. 31 of 2004 concerning Fisheries, as amended by Law No. 45 of 2009, in certain cases Fishery Supervisory Vessels, in this case, fishery supervisors or Fisheries Civil Servants Investigators, can also take special actions in the form of drowning. The high level of fishing activity in the Indonesian State Fisheries Management Area 711 must be accompanied by adequate monitoring activities to ensure compliance by business actors, both industrial scale and small fishermen, so that the sustainability of fisheries resources can be maintained.

Ecodevelopment strategy selection and case simulation of marine ranching enterprises based on evolutionary games

In the context of China’s “dual carbon” goals of carbon peak and carbon neutrality, the ecodevelopment of marine ranching enterprises (MREs) can provide new opportunities for economic growth and environmental protection. MRE ecodevelopment not only enhances the value of enterprise products but also helps restore the marine environment and protect fishery resources, thus promoting the sustainable marine economy development. Since marine ranch development is guided by the government, government regulation and incentives play an important role in MRE ecodevelopment. Based on the principle of participating subjects’ limited rationality, this study constructs an ecodevelopment game payment matrix involving central government regulation, local governments, and MREs and analyzes their decision-making processes. Using MATLAB, parametric analysis and numerical simulation are conducted to reveal the development behaviors of the government and MREs and their influencing factors. The results are as follows: Initial willingness to participate has different influences on the two participating subjects. Government incentive policy has a greater influence on MREs, and the punishment by the central government and monitoring positively contribute to the behavioral choices of the MREs and the government. These findings can help governments formulate mechanisms to promote MRE ecodevelopment. Specifically, we recommended that the governments promote MRE ecodevelopment by establishing hierarchical supervision and management organizational systems, improving policy, and formulating reasonable reward and punishment mechanisms.

Tinjauan Kriminologis Terhadap Faktor-Faktor Penyebab Terjadinya Tindak Pidana Dibidang Perikanan Dan Penanggulangannya Di Laut Kabupaten Bintan

Fishery resources are one of the many natural resources in Indonesia. Its vast aquatic territory makes Indonesia an archipelagic country that hosts numerous activities at sea. The abundance of activities utilizing marine fisheries resources has led to actions detrimental to society. This research examines several issues, including: 1) What factors lead to criminal activities in the field of marine fisheries in the waters of Bintan Regency; and 2) What efforts are made by law enforcement authorities to prevent and address criminal activities in the field of marine fisheries in Bintan Regency. The research method used is empirical juridical research. Data collection is conducted through interviews with relevant parties and literature research related to the research topic. The obtained data is analyzed qualitatively and presented descriptively. The research results indicate that Bintan Regency is vulnerable to fisheries-related crimes. Several cases have been handled by the relevant authorities. The factors causing fisheries-related crimes in Bintan Regency can be summarized as follows: first, low awareness, compliance, and legal effectiveness; second, low economic status among fishermen; and third, low educational levels. Efforts made by law enforcement authorities include preventive measures such as legal counseling, patrols, redirecting community activities, providing environmentally friendly modern assistance, and establishing community monitoring groups. In addition, repressive efforts are also carried out through strict law enforcement, including arrests and examinations that result in the application of sanctions in accordance with the laws of Indonesia

Tinjauan Hukum Pidana Internasional Atas Tindakan Eksploitasi Sumber Daya Perikanan Di Wilayah Laut ZEE Indonesia Oleh Kapal Asing

The Exclusive Economic Zone (EEZ) is a new legal system regulated in the 1982 maritime law agreement between countries. Therefore, the abundant marine fisheries resources in Indonesia's EEZ allow for actions that are detrimental to being an archipelagic country due to violations committed by foreign countries that violate state sovereignty. Therefore, the Indonesian government has established legal rules regarding the use of fisheries resources and maritime boundaries in Law Number 17 of 1985 from the ratification of UNCLOS 82, and in its implementation these legal rules must not deviate from the Indonesian Constitution. Apart from vigilance, of course this is a a warning to the country in maintaining its sovereignty so that it is protected from intervention by foreign countries who secretly steal data on the country's territory and look for gaps in defense weaknesses through maritime boundaries. Therefore, all regulations regarding the territorial boundaries of the Exclusive Economic Zone (EEZ) have been summarized in UNCLOS 82. This article aims to explore aspects related to the protection of water resources in the EEZ and the provisions of international and transnational criminal law that anticipate the protection of water resources in the EEZ. This research utilizes normative methods that are descriptive in nature and tend to utilize data analysis.

Analysis of The Addition of Natural Preservative Ingredients To The Saving Time of Squid (Loligo Sp.) (Study Of Various Studies Conducted)

Squid is one of Indonesia's marine fisheries resources that is nutritious and in high demand by the public, hence the need for good quality squid. The obstacle experienced in fulfilling the demand for squid is the quality of squid. Various research have been conducted to determine preservatives that are effective enough to maintain the freshness of squid for a long time and extend the shelf life. This research was conducted using a literature study technique, comparing and selecting the most effective of several natural preservatives used. Some of the preservatives compared were lactate solution from cabbage fermentation, yogurt, chitosan solution, picung seeds, and cucumber. This study aims to determine the effective preservatives that have the longest shelf life for squid. The results of the literature study showed that yoghurt was the most effective preservative for extending the shelf life of squid until day 11 with total lactic acid bacteria colonies of 4.8x 105 cfu/gram and pH value of 6.8 in low temperature storage. The concentration used was 1.5%.

Numerical models reveal the suitable habitat area for the stock enhancement and release of marine organism larvae in Liaodong Bay

Stock enhancement can effectively increase population sustainablility and improve fishery resources, making it crucial to discern the suitable habitats for stock enhancement based on efficiency considerations. In this paper, a comprehensive model was established to simulate environmental characteristics in the Liaodong Bay. A habitat suitability model was developed by considering the optimal growth conditions of the Portunus trituberculatus larvae (PTL). The coupled model showed that the optimal area for stock-enhancement with PTL occurs in late June, and the initial suitable habitat area identified represents 17.12% of the whole Liaodong Bay. Based on the larval migration model of PTL, the deviation between the larvae and the suitable habitat, as well as the actual available area for stock enhancement, were further determined after larval release in the initial suitable habitat. Only 33.67% of the larvae fulfilled the criteria of remaining within the suitable habitat for 95% of the time, and these larvae represented 6.19% of the whole area of Liaodong Bay. These findings means that the truly area available for stock enhancement is likely to be a very small portion of the entire bay, and more precise release of larvae will be necessary to ensure survival rates after release. Our study actually provides a methodological framework for the identification of suitable environment of stock enhancement. This methodology can provide technical guidance for the stock enhancement of marine larvae with same applicability for other bays, which in turn contributes to the sustainable use of marine ecosystem services and fisheries resources.

Perception of marine fisheries resources in Tanzania from past to present: Evidence through local knowledge

How communities interact with natural resources is a critical topic of discussion around the world. In this study, we approach the phenomenon from the fishers’ perspective. This study aims to explore the perception and knowledge of local fishers regarding fishing practices. With the help of interviews and focus group discussions with residents of three fishing communities located along the Indian Ocean coast in Tanzania, the research discovered that these local fishers are not just engaged in catching fish; they also possess a valuable understanding of the ocean and fishing practices. The study concludes that incorporating the perception and knowledge of these local fishermen into future fisheries management initiatives could be highly beneficial. Highlights Fishers do not merely fish; they possess rich and valuable knowledge regarding marine resources The knowledge is vital for improved fisheries management Fisheries managers need to consider fishers as knowers, not merely exploiters of fisheries resources Integration of local knowledge and scientific knowledge in fisheries management would yield better fruits

Research on attitude compensated algorithm for shipborne dynamic weighing

Shipborne dynamic weighing is fundamental in developing marine fishery resources and oceanographic research. It enables the weighing and sorting of seafood, quantitative baiting, and measurement of research sample weights in marine environments. Therefore, developing shipborne dynamic weighing systems is crucial for the integrated exploitation of marine fishery resources. However, research on shipborne dynamic weighing is limited. To address this issue, the study initially analyzed the impact of ship’s attitude information on weighing results. Subsequently, a mathematical model for shipborne dynamic weighing, incorporating compensation factors, was constructed. The compensation factors were determined using the Recursive Least Squares (RLS) method. And then real-time weight estimation was updated using Kalman filtering, effectively mitigating the influence of ship oscillations and swaying on weight measurements. Furthermore, a shipborne dynamic weighing system with a 24-bit analog-to-digital converter (ADC) and STM32F4 processor was developed. The system performance was evaluated by simulating the sail of a ship under different sea conditions on a swing platform. The results demonstrate that the average absolute percentage error of the test meets the requirement of less than 1%, and the standard deviation of the error is less than 1% F. S., which essentially meets the weight measurement requirements of marine dynamic weighing and sorting.