0.0212 - 0.00159 = 0.8723< 1. This shows that productivity according to investment scale in lobster farming is decreasing.
The results of the average product value are all positive and consistent with the theory. The value of marginal product (MP i ) is lower than the average product value (AP i ) showing that the current lobster productivity in Phu Yen province is decreasing according to the scale of investment in input factors.
Lobster farmers have not effectively used input factors to achieve maximum profits. To achieve economic efficiency in lobster farming, lobster farmers can increase the stocking density by 2,417 lobsters/m3 and reduce the amount of feed by 65.85 kg/m3, assuming other factors remain unchanged.
Based on the research results, the topic has proposed solutions and suggested policies related to breeds, food, and medicine for lobsters as well as issues related to training, propaganda, and improving the shrimp farming skills of households to improve the economic efficiency of lobster farming in Phu Yen province.
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Identify Rating Levels and Rating Scales
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of the islanders. Therefore, this indicator will be divided into two sub-indicators:
a1. Natural tourism attractiveness a2. Cultural tourism attractiveness
b. Tourist capacity
The two island communes in Quan Lan have different capacities to receive tourists. Minh Chau Commune is home to many standard hotels and resorts, attracting high-income domestic and international tourists. Meanwhile, Quan Lan Commune has many motels mainly built and operated by local people, so the scale and quality are not high, and will be suitable for ordinary tourists such as students.
c. Time of exploitation of Quan Lan Island Commune:
Quan Lan tourism is seasonal due to weather and climate conditions and festivals only take place on certain days of the year, specifically in spring. In Quan Lan commune, the period from April to June and from September to November is considered the best time to visit Quan Lan because the cultural tourism activities are mainly associated with festivals taking place during this time.
Minh Chau island commune:
Tourism exploitation time is all year round, because this is a place with a number of tourist attractions with diverse ecosystems such as Bai Tu Long National Park Research Center, Tram forest, Turtle Laying Beach, so besides coming to the beach for tourism and vacation in the summer, Minh Chau will attract research groups to come for tourism combined with research at other times of the year.
d. Sustainability
The sustainability of ecotourism sites in Quan Lan and Minh Chau communes depends on the sensitivity of the ecosystems to climate changes.
landscape. In general, these tourist destinations have a fairly high level of sustainability, because they are natural ecosystems, planned and protected. However, if a large number of tourists gather at certain times, it can exceed the carrying capacity and affect the sustainability of the environment (polluted beaches, damaged trees, animals moving away from their habitats, etc.), then the sustainability of the above ecosystems (natural ecosystems, human ecosystems) will also be affected and become less sustainable.
e. Location and accessibility
Both island communes have ports to take tourists to visit from Van Don wharf:
- Quan Lan – Van Don traffic route:
Phuc Thinh – Viet Anh high-speed boat and Quang Minh high-speed boat, depart at 8am and 2pm from Van Don to Quan Lan, and at 7am and 1pm from Quan Lan to Van Don. There are also wooden boats departing at 7am and 1pm.
- Van Don - Minh Chau traffic route:
Chung Huong high-speed train, Minh Chau train, morning 7:30 and afternoon 13:30 from Van Don to Minh Chau, morning 6:30 and afternoon 13:00 from Minh Chau to Van Don.
f. Infrastructure
Despite receiving investment attention, the issue of infrastructure and technical facilities for tourism on Quan Lan Island is still an issue that needs to be resolved because it has a direct impact on the implementation of ecotourism activities. The minimum conditions for serving tourists such as accommodation, electricity, water, communication, especially medical services, and security work need to be given top priority. Ecotourism spots in Minh Chau commune are assessed to have better infrastructure and technical facilities for tourism because there are quite complete and synchronous conditions for serving tourists, meeting many needs of domestic and foreign tourists.
3.2.1.4. Determine assessment levels and assessment scales
Corresponding to the levels of each criterion, the index is the score of those levels in the order of 4, 3, 2, 1 decreasing according to the standard of each level: very attractive (4), attractive (3), average (2), less attractive (1).
3.2.1.5. Determining the coefficients of the criteria
For the assessment of DLST in the two communes of Quan Lan and Minh Chau islands, the students added evaluation coefficients to show the importance of the criteria and indicators as follows:
Coefficient 3 with criteria: Attractiveness, Exploitation time. These are the 2 most important criteria for attracting tourists to tourism in general and eco-tourism in particular, so they have the highest coefficient.
Coefficient 2 with criteria: Capacity, Infrastructure, Location and accessibility . Because the assessment area is an island commune of Van Don district, the above criteria are selected by the author with appropriate coefficients at the average level.
Coefficient 1 with criteria: Sustainability. Quan Lan has natural and human-made ecotourism sites, with high biodiversity and little impact from local human factors. Most of the ecotourism sites are still wild, so they are highly sustainable.
3.2.1.6. Results of DLST assessment on Quan Lan island
a. Assessment of the potential for natural tourism development
For Minh Chau commune:
+ Natural tourism attractiveness is determined to be very attractive (4 points) and the most important coefficient (coefficient 3), so the score of the Attractiveness criterion is 4 x 3 = 12.
+ Capacity is determined as average (2 points) and the coefficient is quite important (coefficient 2), then the score of Capacity criterion is 2 x 2 = 4.
+ Exploitation time is long (4 points), the most important coefficient (coefficient 3) so the score of the Exploitation time criterion is 4 x 3 = 12.
+ Sustainability is determined as sustainable (4 points), the important coefficient is the average coefficient (coefficient 1), so the score of the Sustainability criterion is 4 x 1 = 4 points
+ Location and accessibility are determined to be quite favorable (2 points), the coefficient is quite important (coefficient 2), the criterion score is 2 x 2 = 4 points.
+ Infrastructure is assessed as good (3 points), the coefficient is quite important (coefficient 2), then the score of the Infrastructure criterion is 3 x 2 = 6 points.
The total score for evaluating DLST in Minh Chau commune according to 6 evaluation criteria is determined as: 12 + 4 + 12 + 4 + 4 + 6 = 42 points
Similar assessment for Quan Lan commune, we have the following table:
Table 3.3: Assessment of the potential for natural ecotourism development in Quan Lan and Minh Chau communes
Attractiveness of self-tourismof course
Capacity
Mining time
Sustainability
Location and accessibility
Infrastructure
Result
Point
DarkMulti
Point
DarkMulti
Point
DarkMulti
Point
DarkMulti
Point
DarkMulti
Point
DarkMulti
CommuneMinh Chau
12
12
4
8
12
12
4
4
4
8
6
8
42/52
Quan CommuneLan
6
12
6
8
9
12
4
4
4
8
4
8
33/52
b. Assessment of the potential for humanistic tourism development
For Quan Lan commune:
+ The attractiveness of human tourism is determined to be very attractive (4 points) and the most important coefficient (coefficient 3), so the score of the Attractiveness criterion is 4 x 3 = 12.
+ Capacity is determined to be large (3 points) and the coefficient is quite important (coefficient 2), then the score of the Capacity criterion is 3 x 2 = 6.
+ Mining time is average (3 points), the most important coefficient (coefficient 3) so the score of the Mining time criterion is 3 x 3 = 9.
+ Sustainability is determined as sustainable (4 points), the important coefficient is the average coefficient (coefficient 1), so the score of the Sustainability criterion is 4 x 1 = 4 points.
+ Location and accessibility are determined to be quite favorable (2 points), the coefficient is quite important (coefficient 2), the criterion score is 2 x 2 = 4 points.
+ Infrastructure is rated as average (2 points), the coefficient is quite important (coefficient 2), then the score of the Infrastructure criterion is 2 x 2 = 4 points.
The total score for evaluating DLST in Quan Lan commune according to 6 evaluation criteria is determined as: 12 + 6 + 6 + 4 + 4 + 4 = 36 points.
Similar assessment with Minh Chau commune we have the following table:
Table 3.4: Assessment of the potential for developing humanistic eco-tourism in Quan Lan and Minh Chau communes
Attractiveness of human tourismliterature
Capacity
Mining time
Sustainability
Location and accessibility
Infrastructure
Result
Point
DarkMulti
Point
DarkMulti
Point
DarkMulti
Point
DarkMulti
Point
DarkMulti
Point
DarkMulti
Quan CommuneLan
12
12
6
8
9
12
4
4
4
8
4
8
39/52
Minh CommuneChau
6
12
4
8
12
12
4
4
4
8
6
8
36/52
Basically, both Minh Chau and Quan Lan localities have quite favorable conditions for developing ecotourism. However, Quan Lan commune has more advantages to develop ecotourism in a humanistic direction, because this is an area with many famous historical relics such as Quan Lan Communal House, Quan Lan Pagoda, Temple worshiping the hero Tran Khanh Du, ... along with local festivals held annually such as the wind praying ceremony (March 15), Quan Lan festival (June 10-19); due to its location near the port and long exploitation time, the beaches in Quan Lan commune (especially Quan Lan beach) are no longer hygienic and clean to ensure the needs of tourists coming to relax and swim; this is also an area with many beautiful landscapes such as Got Beo wind pass, Ong Phong head, Voi Voi cave, but the ability to access these places is still very limited (dirt hill road, lots of gravel and rocks), especially during rainy and windy times; In addition, other natural resources such as mangrove forests and sea worms have not been really exploited for tourism purposes and ecotourism development. On the contrary, Minh Chau commune has more advantages in developing ecotourism in the direction of natural tourism, this is an area with diverse ecosystems such as at Rua De Beach, Bai Tu Long National Park Conservation Center...; Minh Chau beach is highly appreciated for its natural beauty and cleanliness, ranked in the top ten most beautiful beaches in Vietnam; Minh Chau commune is also home to Tram forest with a large area and a purity of up to 90%, suitable for building bridges through the forest (a very effective type of natural ecotourism currently applied by many countries) for tourists to sightsee, as well as for the purpose of studying and researching.
Figure 3.1: Thenmala Forest Bridge (India) Source: https://www.thenmalaecotourism.com/(August 21, 2019)
3.2.2. Using SWOT matrix to evaluate Quan Lan island tourism
General assessment of current tourism activities of Quan Lan island is shown through the following SWOT matrix:
Table 3.5: SWOT matrix evaluating tourism activities on Quan Lan island
Internal agent
Strengths- There is a lot of potential for tourism development, especially natural ecotourism and humanistic ecotourism.- The unskilled labor force is relatively abundant.- resource environmentunpolluted, still
Weaknesses- Poorly developed infrastructure, especially traffic routes to tourist destinations on the island.- The team of professional staff is still weak.- Tourism products in general
quite wild, originalintact
general and DLST in particularalone is monotonous.
External agents
Opportunity- Tourism is a key industry in the socio-economic development strategy of the province and Van Don economic zone.- Quan Lan was selected as a pilot area for eco-tourism development within the framework of the green growth project between Quang Ninh province and the Japanese organization JICA.- The flow of tourists and especially ecotourism in the world tends toincreasing
Challenge- Weather and climate change abnormally.- Competition in tourism products is increasingly fierce, especially with other localities in the province such as Ha Long, Mong Cai...- Awareness of tourists, especially domestic tourists, about ecotourism and nature conservation is not high.
Through summary analysis using SWOT matrix we see that:
To exploit strengths and take advantage of opportunities, it is necessary to:
- Diversify products and service types (build more tourism routes aimed at specific needs of tourists: experiential tourism immersed in nature, spiritual cultural tourism...)
- Effective exploitation of resources and differentiated products (natural resources and human resources)
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The impact of financial market development on the capital structure of listed enterprises in the ASEAN Economic Community - 28 -
Policy Suggestions for Increasing the Impact of Factors -
Study on nitrogen-metabolizing bacteria in the bottom of the lobster farming area Panulirus sp. for aquaculture - 2 -
Ranking the Level of Impact of Factors on Financial Statements
Chapter 1: INTRODUCTION
1.1 Research problem statement:

Lobster farming currently brings very high economic value. After each lobster harvest, farmers can earn double the profit of their investment. According to the report at the Workshop "Sustainable lobster development in the Central region" on August 16, 2015, from the beginning of 2014, the price of commercial lobster was nearly 2.5 million VND/kg, by 2015 it was about 1.2-1.3 million VND/kg, much higher than other agricultural, forestry and aquatic products in our country. Cage lobster farming in Vietnam has really developed since 2000. By August 2015, the number of cages was estimated at more than 53,000, of which Phu Yen had more than 23,627 cages, Khanh Hoa 28,455 cages... with about 8,000-10,000 farming households, the output reached about 1,600 tons/year, bringing in revenue of 3,500 billion VND/year.
Phu Yen is one of the provinces with the largest lobster farming in Vietnam. With a 189km long coastline, Phu Yen province has great potential for developing fishing and aquaculture. Many mountain ranges extend to the sea to form bays, lagoons and many islands can protect against wind and waves, creating favorable conditions for the development of cage aquaculture as well as lobster farming.
However, lobster farming in our country in general and Phu Yen province in particular is currently showing many limitations. After more than a decade of development, lobster farming is still passive in terms of seed sources, increasing diseases, improper treatment of the farming environment, increasing input prices, unstable prices and output markets, lack of planning, unstable lobster output. This is a big challenge for lobster farmers and policy makers. The top concern of farmers and managers is the profitability and stability of the farming profession. Therefore, analyzing the profitability of lobster farming from different approaches, researching to improve economic efficiency by optimally using input factors in lobster farming is an urgent need to help managers advise farmers and propose measures and policies to develop.
lobster farming development
Through the topic "Influence of input factors on economic efficiency of lobster farming in Phu Yen province" can provide a deeper insight into the input factors affecting lobster productivity, thereby analyzing and evaluating their influence on technical efficiency, economic efficiency in lobster farming of households in Phu Yen province. On that basis, some measures and policies will be suggested to promote and improve the economic efficiency of lobster farming in Phu Yen province.
1.2 Research objectives:
1.2.1 General objectives
Identifying and analyzing the impact of input factors on lobster productivity and analyzing economic efficiency will help to make some recommendations to increase lobster productivity in Phu Yen province.
1.2.2 Specific objectives
- Identify and analyze the impact of input factors on lobster productivity in Phu Yen province.
- Analysis of economic efficiency in lobster farming in Phu Yen province.
- Propose solutions and suggest some policies to contribute to increasing productivity and improving economic efficiency of lobster farming in Phu Yen province.
1.3 Research question:
- How do input factors affect lobster productivity in Phu Yen province?
- Technical efficiency of inputs used in lobster farming households in Phu Yen province? Are inputs used efficiently to achieve maximum profit?
- How to improve the economic efficiency of lobster farming in Phu Yen province?
1.4 Data analysis method:
The topic uses Excel to load collected data and calculate important indicators in production. Use Stata software to analyze descriptive statistics, analyze linear regression and test necessary assumptions for the topic.
1.5 Research objects and scope:
Research object: on the situation of lobster farming, factors affecting productivity, costs, revenue and profit from lobster farming of households representing 09 districts, communes and cities of Phu Yen province.
Scope of research: The topic focuses on surveying practical data on the main lobster farming situation in 2015 in 5 communes and wards of Song Cau town, with the largest area, number of cages, and number of lobster farming households and typical for Phu Yen province, namely Xuan Canh commune, Xuan Phuong commune, Xuan Yen ward, Xuan Thanh ward, Xuan Dai ward.
1.6 Steps to conduct research:
- Identify the research problem, research purpose, data analysis method, research object and scope.
- Identify relevant theoretical bases.
- Collect primary and secondary data.
- Data analysis, hypothesis testing, models.
- Present the main research results of the topic.
- Propose measures and policy suggestions.
1.7 Practical significance of the topic:
The topic has applied the theory of agricultural household economics in general and aquaculture in particular, the theory of Cobb - Douglass production function... to determine the characteristic factors affecting the productivity of lobster farming. Based on actual data collected from lobster farming households, applying economic models
to demonstrate the influence of these factors on economic efficiency in lobster farming. Propose measures and suggest policies to improve economic efficiency in lobster farming.
1.8 Structure of the topic
The topic consists of 6 Chapters.
Chapter 1: Introduction.
Introduce basic issues of the research such as: research problem statement, research objectives, research questions, research data analysis methods, research objects and scope; present research steps, practical significance of the topic and structure of the topic.
Chapter 2: Theoretical basis and related studies.
Presenting theories related to the research content including theories of agriculture and aquaculture, theories of economic efficiency in agriculture, theories of input factors, economic analysis methods using production functions, the law of diminishing marginal productivity and applications of the Cobb - Douglas production function; domestic and foreign empirical studies related to the topic.
Chapter 3: Research methodology.
Present the research methodology including sample selection, data collection and data analysis.
Chapter 4: Overview of the research area.
Present an overview of the research area characteristics, aquaculture situation in Phu Yen province, lobster farming situation in Phu Yen province, and technical regulations for shrimp farming.
Chapter 5: Research results on lobster production and farming efficiency.
Descriptive statistical analysis of lobster farming situation of households and production results statistics, partial accounting analysis, production function model results analysis, optimal input factor analysis.
Chapter 6: Conclusion and recommendations
Conclude the main research content and results, propose some measures and suggest some policies to improve the economic efficiency of lobster farming of households in the research area.
Chapter 2: RELATED THEORIES AND STUDIES
BEFORE
2.1 Related theories
2.1.1 Concept and characteristics of aquaculture:
2.1.1.1 Concept
Household economy is considered a business organization owned by a household, recognized by law as a basic economic unit. Farming households become autonomous units in agricultural production. Members have common assets and contribute their efforts to common economic activities in agricultural, forestry and fishery production (Mai Thi Thanh Xuan et al., 2013).
Aquaculture is the process of farming aquatic species including fish, molluscs, crustaceans and aquatic plants in inland and coastal areas, including interventions in the rearing process to increase production and organizations and individuals carrying out aquaculture activities (FAO, 2008). Aquaculture in the world has a history dating back to about 500 years BC in China. Aquaculture in Vietnam began in the 1960s and developed rapidly since the 1970s (Nguyen Thanh Phuong et al., 2009).
2.1.1.2 Characteristics of aquaculture:
Aquaculture is an outdoor production activity and the production objects of the aquaculture industry are animals that live in the aquatic environment, have cold blood, and are directly affected by many environmental factors. Organisms and production conditions such as weather, climate, environmental factors (hydrology, hydrochemistry, hydrobiology) ... impact, influence each other and have unpredictable changes. Production techniques help the cultured objects develop well, achieve high and stable productivity and output only when they are suitable for ecological requirements, suitable for the growth, development and reproduction laws of the cultured objects.
Therefore, in order for cultivated objects to grow well, humans must create a suitable living environment for each object.
In the production process, the aquaculture industry is subject to both natural and economic laws. The climate and weather conditions of each region in Vietnam are different. The same farming object but in different localities have different production seasons, therefore, its economic efficiency is also different. Moreover, the level of infrastructure investment also determines the level of intensive farming and production capacity of aquaculture.
Aquaculture is very seasonal. In aquaculture, in addition to direct human impact, the farmed objects are also affected by the natural environment. Therefore, in aquaculture, working time does not completely match the production time. The basic factor that determines seasonality is the growth and development of the farmed objects. On the other hand, the seasonality of the aquaculture industry requires each farming household to have a plan and organize the harvest and consumption of products well, such as determining appropriate seasonal prices.
2.1.2 Economic efficiency in agriculture in general and aquaculture in particular
Economic efficiency or production efficiency is an economic category that includes technical efficiency and distribution efficiency. Technical efficiency is the ability of a production household to achieve the maximum output level from a certain set of given input factors corresponding to a certain technical level. Distribution efficiency is considered the optimal combination of input factors to minimize costs for a given output level or maximize profits. Economic efficiency is the product of technical efficiency and distribution efficiency (Farrell, 1957).
The assessment of the economic performance of a farming system is an overall quantitative assessment of the entire system and the production activities taking place within the system.





