The Central Rural Work Conference was successfully held in December 2024, and since then, the national agricultural and rural system has fully implemented the spirit of the conference and arranged agricultural and rural work for 2025.Based on an analytical framework of policy background, objectives, and tools, this study examines the context and goals of the Central Rural Work Conference, as well as the overall framework of the draft document Opinions of the Central Committee of the Communist Party of China and the State Council on Further Deepening Rural Reform and Solidly Promoting Comprehensive Rural Revitalization discussed at the conference. It also analyzes the impact on fishery policies, with a focus on five key policy areas: "promoting high-quality development of fisheries, supporting deep-sea aquaculture, strengthening the treatment of aquaculture tail water, resolutely advancing the ten-year fishing ban in the Yangtze River, and enhancing the management of fishing vessels involving Taiwan and foreign affairs." Additionally, the study explores favorable impacts on the development of aquatic seed industry, fishery technological innovation, recreational fisheries, and the reform and development of fishing villages, as well as other related fishery public policies such as balancing international trade of aquatic products. The aim is to provide references for fishery policy research.

This paper summarizes the basic situation of the national fishery economy operation in 2024, elaborating on aspects such as fishery production, the operation of aquatic product markets, import and export trade, and the construction of blue granaries. It analyzes the problems existing in the operation of the national fishery economy and finds that China's fishery economy is facing challenges such as an unfavorable situation in fishery capture production, a decline in input factors for aquaculture production, a drop in aquatic product prices, insufficient growth momentum for fishermen's income, an increasing dependence on imports, and severe fishery disasters. It also puts forward suggestions such as stabilizing fishery production, expanding development space, reducing the impact of imported aquatic products on the domestic market, and enhancing the ability to resist fishery natural disasters.

 The construction of fishing port economic zones is an important measure proposed in response to the national strategy of building a maritime power. In the face of the new situation of the development of the marine fishery economy in the new era, accelerating the adjustment of the fishery industry structure, optimizing the layout of marine fishery productivity, and exploring new models for the construction of fishing port economic zones, in order to fully tap into the multiple functions of the fishery and continuously expand the value-added space of the fishery, is an inevitable requirement for adapting to the high-quality development of the marine economy in the new era, and is also an important way to carry out the construction of modern fishing port economic zones. Based on the current situation of fishing port construction at home and abroad, and in response to the main problems restricting the development of fishing port economic zones, a new approach has been proposed to promote the construction of fishing port economic zones with high quality and ensure their healthy and sustainable development, including the multidimensional integration perspective of land and sea resource coordination, industrial structure transformation and upgrading, diversified investment of funds, integration of rural revitalization strategies, and scientific and technological support, in response to the main problems currently restricting the development of fishing port economic zones.

Marine ranching constructions help improve the marine ecological environment and restore fishery resources. Jiangsu province is rich in marine natural resources and human landscape resources, whereas there are still some deficiencies in the construction of modern marine ranching. To accelerate the development of marine ranching, we must adhere to the development concept with ecology, precision, intelligence and integration. Fully exploit the marine natural endowments and cultural landscape resources of coastal cities to reasonable layout the development mode of marine ranching. Promote the formation of a new pattern of marine ranching with rational layout, advanced equipment level, standardized management, diversified industrial integration, high output efficiency, and green ecological development. Realize the precision and intelligence of marine ranching management, and then establish a relatively complete marine ranching construction management system and support system. As a result, form a new development situation of modern marine ranching with resource saving, environment friendly, efficient operation and sustainable output.

The proposal of marine new quality productivity is an important way to seize the new opportunity of blue carbon development and realize the high-quality development of marine economy. Based on the panel data of 53 coastal cities in China, this paper constructs a panel model, takes regional financial development as a moderating variable, and studies the impact of green technology innovation on marine new quality productivity. The empirical study found that during the sample period, green technology innovation significantly promoted the improvement of marine new quality productivity, but regional financial development showed a substitution relationship, and the joint effect of green technology innovation and regional financial development would inhibit the improvement of marine new quality productivity. This paper provides empirical evidence and policy enlightenment on how coastal cities can effectively promote marine green development and stimulate the potential of marine new quality productivity.

 New quality productivity is an advanced productivity with technological innovation as its core, and it is a new driving force for the high-quality development of Guangdong's marine fisheries. The article first summarizes the connotation of new quality productivity in marine fisheries, and then analyzes the current development status and shortcomings of Guangdong's marine fisheries from the perspective of the three basic elements of productivity: laborers, labor materials, and labor objects. Finally, suggestions are made to promote the high-quality development of Guangdong's marine fisheries by cultivating a new type of labor force, creating and applying more high-tech labor materials, expanding the types and scope of labor objects, and optimizing the combination of the three.

The summer fishing moratorium system is an effective means to protect fishery resources, and its function depends on the exploration of the game strategy of each subject. Based on the hypothesis of bounded rationality, this paper uses evolutionary game model to construct game matrix, analyzes the differentiated equilibrium of system implementation with or without the intervention of superior government, and carries out simulation analysis. The results show that: 1) Without external intervention, fishermen and local governments cannot evolve to the optimal stability strategy; 2) The intervention and supervision of the superior government under specific conditions can encourage fishermen and local governments to actively implement the fishing moratorium system; 3) The pressure of local economic growth and the expected income loss of fishermen are the main constraints to the implementation of the system.The sustainable implementation of the summer fishing moratorium system needs to rely on a strong reciprocal incentive mechanism led by the superior government. By balancing ecological protection and fishermen's livelihoods, reducing supervision costs and optimizing the policy environment, multi-party collaborative governance can be achieved.

The yellow croaker is not only an important economic fish in the eastern coastal area of China, but also one of the advantageous export aquatic products in China. Rhubarb fish has high economic price and market demand, and the study of price fluctuation characteristics of rhubarb fish is of great significance for understanding the future price trend of rhubarb fish and avoiding the risk of price fluctuation. In this study, the monthly data of the reference price of sea surface purchase of two sizes of Ningde large yellow croaker, 300-400g and 400-500g, were selected from 2015-2023, and the price fluctuation characteristics of large yellow croaker were investigated by utilizing the X12 seasonal adjustment method, HP filtering, and ARCH class model. The results of the study show that: (1)The reference price fluctuations for the purchase of large yellow croaker on the sea surface have obvious seasonal and cyclical characteristics;(2)Its price fluctuations are clustered and do not have the characteristics of high risk and high return;(3)The fluctuation of the reference price for the sea surface purchase of 300-400g size large yellow croaker exhibits symmetry of information shock, while the fluctuation of the reference price for the sea surface purchase of 400-500g size large yellow croaker exhibits asymmetry of information shock. Based on the above conclusions, suggestions are proposed to promote the further development of the yellow croaker industry by constructing a price monitoring and early warning system, building a full industry chain information platform and a cold chain logistics system.

In January 2021, the country formally implemented a ten year fishing ban in the key waters of the Yangtze River, and the implementation of this program may lead to the loss of fishermen's natural resources that have sustained their livelihoods, so preventing the deterioration of the situation and safeguarding and improving the livelihoods of fishermen has become a new academic issue. Through a two consecutive years field study of 183 retired fishermen in coastal villages in southern Jiangsu Province, the DFID sustainable livelihood framework was introduced to analyze the composition of fishermen's livelihood capital from a new perspective. The study found that compared with the first year of the full-scale fishery withdrawal, all the indicators showed a decreasing trend, with physical capital in a dominant position, social capital relatively high, and natural capital, financial capital and human capital at a lower level. In order to realize the sustainable development of fishermen's livelihood, it is necessary to solve the problem of fishermen's low human cost and do a good job of resettlement, strengthen communication and exchange to build a good relationship of trust, set up a database and electronic archives to conduct continuous dynamic tracking surveys, and consolidate and improve the level of resettlement guarantee for retired fishermen.

China is a big maritime country. Cultivating sea, herding and fishing, and building "blue granary" are of great strategic significance to maintaining Marine ecological environment and ensuring blue food supply. In recent years, China's Marine pasture has developed rapidly, but there are many problems in the development process, such as the lack of rationality and scientific construction layout, the need to strengthen basic research, the need to optimize the technological innovation mechanism, and the imperfection of laws and regulations system. In order to promote the high-quality development of Marine pasture in our country, we should improve the overall management mechanism of Marine pasture, improve the preferential policy and management incentive mechanism, promote scientific and technological innovation, build a risk early warning system of Marine pasture, establish a risk prevention mechanism, improve relevant rules, regulations and laws and policies, integrate the existing incentive support policy, and implement the preferential financial and taxation policies. We will build a diversified and collaborative governance mechanism involving the government, enterprises, industry associations and society.

How to improve the construction of the national marine ranching demonstration area and enhancing the resilience of the ecological environment in coastal areas is an important measure to promote the construction of marine ecological civilization. This study relies on the panel data of 11 coastal provinces (cities) from 2012 to 2021, calculates the level of ecological environment resilience in coastal areas based on the "pressure state response" (PSR) analysis framework, and then uses the multi-stage double difference method to explore the impact of the construction of national marine ranching demonstration area on the ecological environment resilience in coastal areas. The benchmark regression results showed that the construction of the demonstration area significantly enhanced the resilience of the ecological environment in coastal areas, which was still true after the robustness test; The analysis of the impact mechanism shows that the construction of the demonstration area can enhance the resilience of the ecological environment in coastal areas by enhancing the government's environmental governance efforts, promoting the economic development of marine industry, and improving the public's attention to the environment. Heterogeneity analysis found that the promotion effect was more significant in the northern and southern marine economic circles, and was more obvious in the provinces (cities) with high taxes, high informatization and low marketization level.

Against the backdrop of accelerating the construction of a maritime power and achieving sustained and stable development of the marine economy, scientifically evaluating the impact of the maritime power strategy on the total factor productivity of marine related enterprises can help improve the quality and efficiency of the marine related industrial structure. Based on data from marine related enterprises in listed companies from 2007 to 2022, this article uses a difference in differences model to quantitatively evaluate the total factor productivity level of marine related enterprises before and after the construction of a maritime power, and analyzes them from three aspects: regional heterogeneity, enterprise ownership heterogeneity, and enterprise financial debt ratio heterogeneity. The results showed that the construction of a maritime power has a significant positive effect on promoting the improvement of total factor productivity of China's maritime enterprises. Based on this, in order to promote the development of China's marine industry, the following suggestions are proposed: (1) Each region should formulate practical marine economic development strategies according to its own geographical location, resource endowment, and other conditions; (2) Strengthen the leading and exemplary role of state-owned enterprises; (3) Innovate financial service models to meet the unique financial needs of the marine industry.

Regulating preparatory acts of illegal fishing through legal means is crucial for enhancing fishery law enforcement, ensuring fair administrative penalties, and advancing law-based governance. This paper examines the concept and necessity of penalizing such acts, analyzing typical cases to identify current regulatory challenges. Key obstacles include vague legal provisions, unclear timeframes for determining preparatory stages, imprecise subjective/objective identification criteria, and inconsistent penalty benchmarks. Proposed solutions involve refining legal provisions, inferring preparatory stages from intent formation, establishing clear identification standards, and optimizing penalties by referencing criminal law precedents on preparatory crimes.

Aquaculture products are an important source of food supply for Chinese residents, and their quality and safety are also an important part of China's food security. This paper uses bibliometrics, social network analysis, and the entropy weight TOPSIS method to systematically sort out and deeply analyze the aquaculture product quality and safety supervision measures involved in policy documents and related literature. By the analysis, it is concluded that the current aquaculture product quality and safety supervision path can be summarized into three categories: regulatory collaboration enhancement path, responsibility traceability optimization path, and grassroots capacity enhancement path. Based on this, policy suggestions for improving the supervision of aquaculture product quality and safety are proposed. Firstly, digital empowerment for collaborative governance of supervision; secondly, technical empowerment for traceability linkage governance; thirdly, technical empowerment for traceability linkage governance. Under the current situation of high-quality development and the construction of a new pattern, in-depth exploration of the optimization path of aquaculture product quality and safety supervision are of great significance for promoting the green and sustainable development of China's fisheries.

Ecological compensation is the link that regulates the interest relationship between ecological protectors and beneficiaries, and the ecological compensation of marine fishery carbon sink is one of the important policy tools to promote the realization of the ecological value of marine fishery carbon sink. The definition of the concept of ecological compensation of marine fisheries carbon sink and the delineation of compensation policy framework are the basic premise to promote the realization of ecological value of marine fisheries carbon sink. On the basis of comprehensive analysis of relevant research results, this study defines the conceptual connotation of marine fisheries carbon sink ecological compensation system, discusses the core elements of marine fisheries carbon sink ecological compensation, and further designs the framework for formulating ecological compensation policies, aiming at promoting the marketization and diversification of marine fisheries carbon sink ecological compensation.

As the five major sectors in modern fisheries, aquaculture, fishing, fish processing and trade, enhancement of fish stock, and recreational fishing have the characteristics of a relatively large proportion of the total output, strong correlation effects and sensitivity, high technical concentration, strong market expansion capabilities, and sustainability of development. In the new era, Liaoning has made significant progress in these five major sectors of modern fisheries. However, the development of modern fisheries shows unbalancing and insufficiency. It is necessary to improve the economic benefits of aquaculture and optimize marine fishing gear, and upgrade fish processing and marketing, and regulate enhancement of fish stock and expand the scale of recreational fishing. The paper presents the following recommendations: promote aquaculture development through innovation-driven, maintain the number of trawl fishing vessels stable, and promote the upgrading of fish processing and marketing, and conduct fish-enhancement release and marine ranching projects, and develop recreational fishing with different local characteristics.

Enhancing the carbon emission efficiency of the fishery industry in the Yangtze River Economic Belt and fully leveraging its carbon reduction potential is of significant importance for achieving sustainable development in the fishery economy and the "dual carbon" goals, and the development of carbon emissions in the Yangtze River Economic Belt's fishery sector plays a crucial leading role nationwide. This paper, from the perspective of the "dual carbon" goals, utilizes social network analysis to thoroughly investigate the spatial network characteristics of carbon emission efficiency in the Yangtze River Economic Belt's fishery sector. Furthermore, it examines the carbon reduction potential in the Yangtze River Economic Belt's fishery sector from an equity perspective, integrating the analysis of fishery carbon emission efficiency. The following conclusion can be drawn. (1) The efficiency of carbon emissions in the fishery sector is characterized by imbalances, with network connectivity showing higher values in the east and lower in the west. (2) The network relationships are characterized by tightness, connectivity, and spatial spillover effects. Network density remains relatively stable, while network transitivity shows an upward trend. There is a high degree of collaboration between regions, and network efficiency still has room for improvement. The three Provinces of Jiangsu, Zhejiang, and Shanghai dominate the network, quickly establishing connections with other provinces, exerting strong control, and acting as nodes and intermediaries. Overall, carbon emission efficiency levels are excellent in the mid-to-lower reaches of the Yangtze River. (3) Beneficiary regions are concentrated in the lower reaches of the Yangtze River. Bidirectional spillover regions are mainly in the mid-to-lower reaches, broker regions are primarily in some cities in the middle reaches, and net spillover regions are concentrated in the mid-to-upper reaches. Shanghai and Jiangsu have the largest effective scale, the lowest degree of restriction, and the highest node independence, while Anhui and Jiangxi have the smallest effective scale.(4) Regarding the carbon reduction potential in the fishery sector of the Yangtze River Economic Belt, the potential in Jiangsu, Hubei, Chongqing, Shanghai, and Sichuan has been continuously declining, while Yunnan's potential has increased, and the potential in the other four provinces has remained relatively stable. (5) According to the Markov chain analysis of the carbon reduction potential in the fishery sector of the Yangtze River Economic Belt, the potential is relatively stable when the observation period t=1. As the observation period increases, the probabilities of low, medium-low, and medium-high levels of carbon reduction potential evolving to higher levels increase significantly.

The ten year fishing ban on the Yangtze River is a significant decision made by the Central Committee of the Communist Party of China and the State Council for the long term benefit of future generations. Recent research results have shown that the decline of open-water fishery due to the fishing ban has deep impacts on industrial development, fishermen's employment, and the development of fishing areas. This paper utilizes official statistics and field research data to conduct a comparative study on the farming area, output, and farming mode before and after the fishing ban, aiming to understand the development of open water fishery in the Yangtze River. By establishing a measurement method for open water ecological fishery, the evaluation shows a potential increase of more than 900,000 tons and a maximum growth potential of up to 1.35 million tons. Under the backdrop of the ten year fishing ban and the "big food concept," it is crucial for departments at all levels to adapt to local conditions and work together to promote the high quality development of ecological fisheries. Additionally, relevant enterprises should focus on market orientation, implement advanced technologies selectively, and improve the utilization efficiency of suitable fishery resources.

Under carbon peaking and carbon neutrality goals, studying embodied carbon emissions and its productivity of China's aquatic product export trade can not only accurately assess the impact of aquatic products trade on the environment but also holds significant importance for promoting the sustainable development of China's aquatic product trade. This paper used the input-output model to measure the embodied carbon emissions of China's aquatic products export trade from 2007 to 2021, taking into account the carbon sink emission reduction effect of some aquatic products, and further constructed the embodied carbon net productivity index of aquatic products export trade. Subsequently, this study analyzed the evolution characteristics and differences in country-specific flows of the embodied carbon productivity of China's aquatic product export trade using the kernel density estimation method. With the help of LMDI method, it decomposed the embodied carbon productivity of China's aquatic product export trade into three dimensions: energy production efficiency, foreign trade dependence, and export value-added effect, to study its driving factors. The results show that: (1) The embodied carbon productivity of China's aquatic products export trade as a whole exhibits the characteristics of "'slight decrease - continuous increase". There are certain differences among countries, which show a trend of "'substantial narrowing - continuous expansion - basic convergence". And the embodied carbon productivity of China's aquatic product export trade to South Korea has been higher than that of other trading partner countries year by year.(2) The carbon emission level in China's aquatic product trade has achieved significant reduction, but energy conservation and emission reduction is primarily focused on the reduction of direct energy consumption, while the indirect energy-saving and emission-reduction effects is not obvious.(3) Energy production efficiency is the main driving factor for the embodied carbon productivity of China's aquatic product export trade; the export value-added effect plays a weak driving role; and the export trade dependence has a negative inhibitory effect on the embodied carbon productivity of aquatic product export trade. Therefore, improving energy production efficiency, adjusting the export structure of aquatic products, and actively establishing a new development paradigm of the fishery industry with domestic market as the mainstay are important paths to enhance the embodied carbon productivity of China's aquatic products export trade.

This study first analyzes the export status of Chinese tilapia to RCEP member countries from five dimensions: total export value, total export volume, average export unit price, main export destinations, and export varieties. Then, it uses the extended trade gravity model to calculate the potential export volume of Chinese tilapia to RCEP member countries. By comparing it with the actual export volume, the export potential of Chinese tilapia to RCEP member countries is calculated and the reasons are analyzed. The results show that the export volume of Chinese tilapia to RCEP member countries is significantly correlated with China's per capita GDP, population proportion, geographical distance, China's average annual exchange rate, and the average annual exchange rate of trading countries. Based on advantages such as high average export unit price and duty-free policies, China shows huge export potential of tilapia to most RCEP member countries. Based on this, this article proposes development suggestions such as improving export quality, optimizing product structure, reducing costs, preventing exchange rate risks, and strengthening industrial docking.

To investigate the impact of aquatic product exports on the fishery economy in the Yangtze River Delta, this paper uses data of Shanghai, Jiangsu, Zhejiang, and Anhui from 2003 to 2023 to establish a panel data model and uses a two-way fixed-effect model for empirical analysis. The empirical results show that the export of aquatic products in the Yangtze River Delta has a positive impact on the fishery economy, and the fishery economy of the Yangtze River Delta will increase by 0.263% for every 1% increase in the export value of aquatic products. The study further revealed that the production of aquatic products and the advancement of aquatic technology exert a positive simulative effect on the fishery economy in the Yangtze River Delta. On this basis, suggestions which would promote the development of the fishery economy in the Yangtze River Delta are put forward: (1) Meet the domestic market demand and develop diversified export markets. (2) Increase fiscal support and enhance aquaculture technology training and promotion. (3) Deepen regional cooperation and promote coordinated regional development Meet the domestic market demand and expand the diversified export market.

At present, China's researches on the development of uninhabited islands is not sufficient and is in the preliminary research stage. In this paper, we take Jinshan three uninhabited islands in Shanghai as the research object, use SWOT analysis method to study the development conditions of Jinshan three islands, and conclude that the eco-tourism development of Jinshan three islands is currently facing the lack of rules and regulations, shortage of talents, weak infrastructure, low visibility and other pain points that need to be paid attention to, and from the Jinshan three islands' own situation and combined with domestic and international experience in island tourism development, with the aim of finding suitable development We put forward the idea of building Jinshan Island into an ecological cultural tourism island integrating “ecology+tourism+science popularization”, which not only protects the pristine ecological environment, but also develops novel tourism experience projects in combination with its own conditions, and at the same time, gives full play to the traditional cultural characteristics to create a business card that belongs to Jinshan Island. At the same time, the traditional cultural characteristics will be utilized to create a special name card belonging to the three islands of Jinshan.

Crustaceans (including shrimp and crab, hereinafter), mollusks are important components of China's diversified food supply system and a major source of high-quality animal protein. In order to scientifically calculate the edible portion of crustaceans and mollusks, enhance the practicality of fisheries statistical data, and achieve rapid conversion between shell weight and edible weight of aquatic products, the National Fisheries Extension Service and the Chinese Fisheries Society organized a study in 2022 on the conversion coefficients of meat yield and shell weight of crustaceans and mollusks. This study formulated feasible technical routes, clarified unified definitions, measurement, and calculation methods, conducted weighing and measurement of crustaceans and mollusks of different sizes and varieties in different regions, and used SPSS 22.0 software for data processing. The study provided calculation results of meat yield, shell weight, and conversion coefficients for all crustacean and mollusk species included in the China Fisheries Statistical Yearbook, analyzing the impact of size, gender, and region on meat yield differences. Results showed that average meat yield for shrimp ranged from 0.118 to 0.546, crabs ranged from 0.305 to 0.680, and mollusks ranged from 0.232 to 0.732. Significant differences in meat yield were found only among different sizes of Litopenaeus vannamei and Procambarus clarkii, while no significant differences were observed among different sizes of other shrimp and crab species. Additionally, besides Charybdis japonica, significant differences in meat yield between females and males were observed in species such as Portunus trituberculatus, Scylla paramamosain, and Eriocheir sinensis, with females generally having higher meat yields than males. The study also proposed concepts and statistical methods for edible portions of crustaceans and mollusks, and calculated the edible portions of crustaceans and mollusks in China for the years 2020 and 2022. The results and conclusions of this study can provide reference for government departments in formulating policies and making decisions, and can also serve as a reference for relevant units in analyzing the dietary nutrition structure and actual intake of animal protein by Chinese residents.

The fishing port economic zone is an important component of the marine economy and a key node in the construction of coastal economic belts. Accelerating the construction of fishing port economic zones is a powerful support for implementing the national strategy of building a strong maritime country. In response to the successive implementation of national level coastal fishing port economic zone projects, in order to scientifically evaluate the construction effectiveness of coastal fishing port economic zone projects and construct an evaluation index system for the implementation effectiveness of coastal fishing port economic zone projects, this paper adopts the Analytic Hierarchy Process to construct a hierarchical structure model, then Satty1-9 scale method is adopted to make pair-to-pair comparison of the relative importance of indicators for the purpose of determining the weight of indicators at each level. Finally, an evaluation index system for the implementation effect of fishing port economic zone is constructed from four aspects: implementation effect of intelligent fishing port, safety fishing port, environmental fishing port and industrial fishing port,which consisting of 4 primary indicators and 16 secondary indicators. This system can provide valuable references for standardizing the acceptance of fishing port economic zone projects.

Promoting the high-quality development of marine enterprises is the key to achieving China's high-quality development. Based on the micro data of China's A-share marine companies, this paper empirically analyzes the impact of the pilot policies of marine economic development on the high-quality development level of marine enterprises by using the difference-in-difference model, and conducts heterogeneity analysis based on regional and enterprise characteristics, and finally uses the multiple intermediary effect model to investigate the comprehensive impact of financing cost and research innovation level on marine enterprises. The results are as below. (1) The pilot policies of marine economic development significantly improves the high-quality development level of marine enterprises. (2) From the perspective of regional heterogeneity, the pilot policies of marine economic development in the Bohai Rim Economic Zone and the Pan Pearl River Delta Economic Zone have significant effects, and the policy implementation effect is closely related to the comprehensive strength of the regional ocean. From the perspective of the heterogeneity of enterprise characteristics, the pilot policy of marine economic development has a more obvious effect on the high-quality development level of enterprises with low financing constraints. (3) The results of the mechanism test show that the pilot policies of marine economic development can achieve the improvement of high-quality development level by promoting the R&D and innovation of marine enterprises. Moreover, financing costs not only play a parallel intermediary role between the pilot policies of marine economic development and the high-quality development level of marine enterprises, but also may play a chain intermediary role through enterprise R&D and innovation.

With their unique geographical and quality characteristics, geographical indication aquatic products have gradually gained the favor of consumers and possess tremendous development potential in the market. Through 506 survey questionnaires, this article establishes a structural equation model based on perceived value and with brand trust as the mediating variable to conduct an empirical analysis of brand loyalty. The research finds that the functional value, economic value, and emotional value of geographical indication aquatic products positively affect brand loyalty, while the positive impact of social value and geographical value is not significant. Brand trust partially mediates the relationship between functional value, economic value, emotional value, and brand loyalty, while it fully mediates the relationship between service value, social value, and brand loyalty. The article also proposes suggestions from aspects such as emphasizing customer perception, ensuring product quality, enhancing social cognition, strengthening brand trust, and intensifying brand promotion efforts.

With the promulgation of "China's Marine Agenda 21", the sustainable development of Marine fishery has become a basic orientation for the formulation of Marine fishery management policies in China. For this reason, the state has successively introduced a series of policies on Marine fishery management, mainly including: Marine fishery resource management, Marine fishery catch management and Marine fishery operation and management policies. The system structure, main characteristics, advantages and disadvantages of these three types of Marine fishery management policies are worthy of in-depth exploration. This paper aims to provide new theoretical guidance ideas and directions for the improvement of relevant fishery management policies in China. Fourteen representative Marine fishery management policies of this type in China were selected, a PMC model was constructed, and the original data was obtained through text mining, thereby conducting in-depth analysis and quantitative evaluation of the policies. The empirical results show that the current management policies for three types of Marine fisheries in China are generally reasonable, but there are still problems such as imperfect policy nature, single policy timeliness and imperfect supervision and evaluation system. In response to the above problems, this paper further puts forward corresponding optimization suggestions, with the aim of assisting relevant departments in making more scientific and reasonable adjustments and improvements in the decision-making process.

The occurrence of marine oil spill accidents has brought huge environmental and economic losses to human society, and the accurate quantitative assessment of ecological damages caused by oil spill and the formulation of compensation measures have become one of the environmental issues to which countries attach great importance. This study establishes an ecological damage compensation value assessment system for marine oil spill caused by ship collisions, applies the Resource Equivalence Analysis (REA) and Habitat Equivalence Analysis (HEA) to assess the loss of marine biological resources and ecological environment caused by oil spill, and uses the Qingdao 4.27 oil spill as an example to conduct research and analysis. The results showed that the ecological loss caused by this accident amounted to 5,736.52 million Yuan. In addition, this study also conducted a sensitivity analysis of the parameters affecting the scale of the restoration project, and among many parameters, the maximum service level of the compensatory restoration project (+11.1%) and the length of the service period of the compensatory restoration project (-19.6%) have the greatest impact on the scale of the restoration project. The above conclusions can provide a reference basis for marine oil spill ecological damage value assessment and compensation research.

Based on the Environmental Kuznets Curve theory, this paper selects panel data from 11 coastal provinces (cities) in China from 2005 to 2020, takes the net carbon emissions of marine fisheries as the research object, and adopts the Spatial Durbin model for empirical analysis to explore the relationship between net carbon emissions of marine fisheries and fishery economic growth. The research results show that there is an "inverted N-shaped" curve feature between the net carbon emissions of China's marine fisheries and fishery economic growth. The total net carbon emissions of marine fisheries decrease first, then increase, and then decrease again with the increase of the total output value of the fishery economy. The two turning points are approximately 2.98766 million yuan and 13.38975 million yuan of the total output value of the fishery economy. Currently, Shandong, Zhejiang, Jiangsu, Guangdong, and Fujian Provinces have crossed the maximum value point, and they are located in the secondary decline stage of the curve. Based on the above conclusions, corresponding countermeasures and suggestions are proposed from the aspects of marine fishing and aquaculture.

Carbon emission reduction is a crucial link of the low-carbon transformation of fishery, and clarifying the marginal carbon emission cost of fishery is the most important part. Based on this view, the paper estimates the marginal carbon emission cost of fishery in 28 provinces of China from 2003 to 2019 using the fishery carbon shadow price model, and further explores their evolution trend and influencing factors. The results show as follows. On the whole, the marginal emission cost of fishery fluctuates and rises, with most provinces continuously increasing and a few provinces no significant changing or slight declining. There are significant differences in marginal costs between regions, and the coastal is much higher than the inland. In terms of dynamic evolution, the kernel density curve shows a downward trend and a rightward shift, with the carbon emission reduction cost evolving to the high value area and the emission reduction space gradually shrinking, the regional difference characteristics are enhanced, and the distortion of resource allocation is aggravated. From the influencing factors, the impacts of industrial structure, energy intensity, fishery development level, fishery scale and specialization degree on the marginal carbon abatement cost are significantly negative, while the impacts of factor endowment and science and technology promotion are significantly positive. Accordingly, each province should clarify its regional advantages and characteristics, formulate differentiated emission reduction policies to reduce the marginal carbon emission cost of fishery, and make efforts from multiple levels such as technical support and industrial structure to promote the overall emission reduction and efficiency improvement of China 's fishery.

The development of agricultural products brand plays an important role in promoting industrial value, enhancing market competitiveness, promoting industrial upgrading and realizing sustainable development, and it is an important strategic direction for the development of modern agriculture. Based on the survey results of industry experts and consumers, this paper calculates the brand value of Chongming hairy crab (adult crab) by using the Interbrand Model. The results show that the value of the brand is 109 million yuan, and the brand is in the growth stage. The growth trend of precipitation income is good, and market factors become the key factors of its growth. At the same time, with the gradual improvement of the insufficient factors in the brand strength of Chongming hairy crab (adult crab), its brand value has a large room for improvement. Therefore, this paper puts forward some basic suggestions, such as encouraging enterprises to expand the market coverage, paying attention to the protection of brand intellectual property rights, enhancing the uniqueness of brand culture, and strengthening the protection of consumers' rights and interests.

Ensuring the supply of aquatic products, strengthening food security, and preparing for supply crises under extreme conditions are crucial. Therefore, understanding the systemic impacts and transmission paths caused by different sources is of great value for preventing supply crises. To explore this issue, this article selects relevant data from 2019 to 2022, applies a cascade failure model to simulate potential supply chain avalanche effects, and conducts a detailed analysis of the structural characteristics of crisis transmission. The results show as bellows. (1) When the ratio r=8, the avalanche processes caused by different economies as crisis sources exhibit significant differences. (2) The trend of snowball changes of important crisis sources from 2019 to 2022 shows diverse characteristics. (3) Out-degree, out-intensity, and centrality of intermediaries have a significant impact on the dynamic transmission of aquatic product supply crises, while in-degree, in-intensity, and eigenvector centrality are not significant. (4) Under the condition of r=8, only the aquatic product supply crisis in Ecuador can spread to China. (5) Spatial proximity has a significant impact on the successive diffusion of crises, and indirect infection is the main route for transmitting cascade crises, which has an important impact on the avalanche process. By optimizing import configurations at critical nodes, implementing dynamic risk monitoring mechanisms, and fostering multilateral trade collaboration, this approach addresses cascading supply risks stemming from climate change and geopolitical conflicts, thereby enhancing the resilience and sustainability of the global aquatic product trade network.

Under the great changes unseen in a century, ASEAN, the fourth trading partner of China's aquatic products export in 2010, has evolved into the first place since 2020. To take precise measures to consolidate and develop the international competitiveness of China's aquatic products, based on the data of UNcomtrade from 2010 to 2022, this study first analyzes the fluctuations of China's aquatic products export to ASEAN and the economic and trade relations. Then the CMS second-order decomposition effect model is used to measure the dynamic effect of the driving factors of fluctuation of China's aquatic products exports to ASEAN. The results show that under the background of the Belt and Road, the effect of ASEAN import demand growth on China's aquatic products exports has a positive effect of continuous growth in the three periods, but the effect of product competitiveness is negative in the three periods. Therefore, based on the background of the new development pattern, it is proposed to make full use of the market effect of The Belt and Road to strengthen international cooperation, give full play to China's digital application advantages, optimize the structure of China's aquatic products, improve the dynamic management ability of China's aquatic products in the international market, and consolidate and enhance the core competitiveness of China's aquatic products in the international market.

Based on the analysis of recent fishing data and conservation management measures for the yellowfin tuna (Thunnus albacares) in the Indian Ocean, this paper discusses the current status of the fishery and proposes targeted development strategies for China. From 1950 to 2022, the catch of yellowfin tuna in the Indian Ocean generally shows an upward trend, with the catch reaching 407,000 metric tons in 2022, approximately 50% of which was accounted for by Oman, the European Union, and Indonesia. Line and Purse seine are the two largest fishing gears in the yellowfin tuna fishery of the Indian Ocean, accounting for 38% and 33% of the total catch respectively, followed by gillnet and longline fishing gears. The current status of the yellowfin tuna is overfished and subject to overfishing. Despite the Indian Ocean Tuna Commission (IOTC) has implemented a series of conservation management measures, and their effectiveness has been less than ideal, with catches still at historic highest levels. As a member state of IOTC, China needs to take active measures to strike a balance between the conservation of yellowfin tuna stock and the promotion of distant-water fishing development, which can be carried out in the following four aspects: Enhance longline fishing capacity for precise catch, strengthen research on yellowfin tuna and participate in making catch quotas, enhance the construction of international fisheries negotiation teams to strive for greater influence, and the last one, improve compliance with international fisheries obligations to meet global demands.