Browsing Master's Thesis in Fisheries and Aquaculture Management and Economics by Title
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- Browsing Master's Thesis in Fisheries and Aquaculture Management and Economics by Title
Browsing Master's Thesis in Fisheries and Aquaculture Management and Economics by Title
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Recalde Ruiz, Jose Renato (Master thesis; Mastergradsoppgave, 15-May-2009)[+][-]
Abstract: Three different types of culture and conditions were tested to determine the profitability of Rural and Artisanal Aquaculture Project in Ecuador: monoculture of the freshwater fish named locally cachama (Piaractus brachypomus), monoculture of red claw crayfish (Cherax quadricarinatus) and polyculture tilapia (Oreochromis sp.) – cachama (Piaractus brachypomus). The economic models used for this particular analysis were Net Present Value (NPV) and Internal Rate of Return (IRR). Using these methods in combination with a sensitivity analysis foresaw the feasibility on investment for the monoculture of red claw crayfish (Cherax quadricarinatus) showing a Net Present Value (NPV) of 11,458.80 USD, which was the highest among the trials, at 8.65% real interest rate and Internal Rate of Return 44%, followed by the monoculture of cachama (Piaractus brachypomus) with NPV of 10,130.82 USD at the same discount rate and IRR 35%, respectively. The third place in order of profitability goes for the polyculture tilapia (Oreochromis sp.) and cachama (Piaractus brachypomus) with NPV of 1,888.99 USD and 8.65% real interest rate. The IRR percentage registered on the last type of culture was 19%, being the lowest among the three types of production analyzed. Among the conditions tested in the sensitivity analysis, there were: the sudden increase in discount rate, 10% increase in costs, 10% decrease in benefits, simultaneous 10% increase in cost and 10% decrease in benefits, 10% increase in feed cost, 10% increase in price of fingerlings and larvae and reduction in survival rate to 73%, 50, 25.1% with 80% as optimal. On this sensitivity analysis, the monoculture of red claw crayfish (Cherax quadricarinatus) overcame most of the conditions tested being defeated by the reduction in survival rate in the order of 50 and 25.1% which NPVs turned out to be negative; -7,429.60 USD and -22,004.70 USD, respectively. On this case the IRR was indefinable. Nevertheless, still some speculations about certain conditions such as broad experience in the Aquaculture field and technological advantage might be serious factors to be considered at the moment to select this investment and they must be analyzed carefully. URI: http://hdl.handle.net/10037/1974 File(s) in this item: 1
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Ly, Nguyen Thi Y (Master thesis; Mastergradsoppgave, 15-May-2009)[+][-]
Abstract: In Vietnam, marine cage lobster aquaculture has been expanding significantly over the last years. Besides the economic contribution for locals living in the coastal areas in Central of Vietnam, this industry has created some problems that are relating to the marine environmental protection where trash fish feed is predominant. This paper investigates the environmental impact on cage marine lobster aquaculture in Vietnam by using the Change of Productivity method in which nitrogen releasing from lobster cage is considered as the seawater quality parameter. And the usage of a mathematics function in this study is Mass Balance Model to calculate the total nitrogen loading volume in an every single crop in three provinces. This approach indicates the reverse relationship between lobster productivity (kg/m2) and volume of nitrogen releasing in a household unit. Additionally, the lobster productivity diminishes gradually if the number of cages increases in specific area. On the other hand, the estimation of the environmental effect uses the ‘Treatment Cost’ calculation for this waste has been done. However, this figure is lower than comparing that of the Change of Productivity method without considering the environmental carrying capacity. To give a strong recommendation to both local authorities, marine environmental management Departments and policy makers having a better consideration to the environmental and economic balance, the analysis of Cost – Benefit is presented in this study. This analysis shows that marine lobster aquaculture industry in Vietnam is profitable. However, because there is yet marine lobster food processing industry, the lack of awareness in environmental conservation from lobster farmers as well as the open-access sea in Vietnam that have been generating increasingly the marine water pollution. Therefore, in order to have a sustainability in cage marine lobster aquaculture development in Vietnam, it is vital for the local authorities and any other organizations to promote the development of high quality feed from food industry, to have technical training programs and raise up the awareness of the community in environmental protection as well as to plan strategic schemes to the entire region especially in the farming areas. Finally, setting up the environmental protection regulations to whose responsibility in a certain sea area is essential task to the government. URI: http://hdl.handle.net/10037/1976 File(s) in this item: 1
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Luong, Nguyen Trong (Master thesis; Mastergradsoppgave, 15-May-2009)[+][-]
Abstract: A field study on the economic performance indicators for coastal fisheries are needed in order to implement fisheries policy in Khanh Hoa as well as in Vietnam. The research project “Economic performance indicators for coastal fisheries - the case of pure-seining in Khanh Hoa” established to fulfill these demands. A questionnaire about technical characteristics and economic data is used for data collection through interviews with vessel owners. This paper presents preliminary findings for 100 purse seiners, representing 10% of the total population, in Nha Trang and Cam Ranh (Khanh Hoa province) in the group of vessels with engine power of less than 90 HP. The following indicators are presented: gross revenue, gross value added, gross cash flow, net profit and crew share. The results show that the coastal purse seine fishery in Cam Ranh is more profitable than in Nha Trang for each engine power group. The owner of an average purse seiner of all groups of horse power in both locations of Nha Trang and Cam Ranh is not only capable paying for all expenses, but also has a reward for the operating year. The boat owner of an average vessel in the group of horse power of 75 -< 90 Hp has the highest values of annual gross cash flow and net profit following location. Thus, the annual average of crew shares for this group of horse power was quite high. It was almost 2.0 times more than the average earnings of labor in the whole country. The boat owners of the engine power group of < 20Hp and 20-<45Hp have lowest values of annual vessel gross cash flow and net profit following location. Thus, the annual average of crew shares for those groups of horse power is quite low. They are almost 1.2 times more than the average earnings of labor in the whole country. Regression analysis of gross revenue using technical characteristics as independent variables is performed, and the results are demonstrated. The technical factors that impact on the gross revenue are the length of net, fishing experience of skipper and location. These are significant factors impacting on the gross revenue. Further work will include collection of more data, which will be analyzed with stronger techniques for in depth analysis such as Data Envelopment Analysis (DEA) or Stochastic Production Frontier (SPF). URI: http://hdl.handle.net/10037/1977 File(s) in this item: 1
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Dien, Mai Van (Master thesis; Mastergradsoppgave, 15-May-2009)[+][-]
Abstract: The initial results of this study demonstrated that the offshore gillnets fleets in the Central of Vietnam can get high economic efficiency, an offshore gillnet vessel make a margin profit of 10%, the annual income of vessel can reach 51% of gross revenue. The average annual income of a fishing man is much higher than the average personal income on the national scale, corresponding to 156% in 2007. The offshore gillnet fishery could be attracted labour as well as investment in the future. The analysis has demonstrated that a gillnet vessel in the group of vessels with main engine power upper than 90hp has higher annual gross revenue, income, and net profit than the rest group. Impacts of engine power and hull length have also significant for vessel group with smaller 90hp engine power. For improving on economic performance, it is necessary to encourage owners of vessels in group smaller 90hp take more investment to improve vessel’s engine as well as hull length. For gillnet vessels in group of larger 90hp, the owners should not concentrate on engine power, the hull length need to be maximized correlative with the current engine capacity, the total gillnets length should be increased. The limitations of this study include a quite small sample because of the data collection is very difficult and costly in the current Vietnam’s conditions. The sample does not cover some important indicators such as the marine resources, the changing in market prices of inputs or outputs of the used models, and social-economic indicators (management ability, skipper and crew skills, education and average age of fishing men, and so on). Key words: offshore gillnet, economic performance, gross revenue, annual income URI: http://hdl.handle.net/10037/2000 File(s) in this item: 1
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Do, Hung Nguyen (Master thesis; Mastergradsoppgave, 12-Jun-2009)[+][-]
Abstract: Trao Reef Locally Managed Marine Reserve was established in 2001 to protect coral reef being under threat because of human activities. However, the economic value of coral reef represents an important sight to help local people and resource managers in using and managing the resource effectively in the marine reserve has not been seen. By using financial analysis to calculate producer surplus of resource users, this study evaluated the direct use value consisting of fishery and aquaculture values of coral reef in the marine reserve. The findings show that the direct use value of coral reef is US$ 207,819 in which aquaculture is an important contribution. This study also investigated the evaluation of effectiveness of the marine reserve management under the context of community based management approach by contrasting with Nha Trang Bay MPA management which follows top-down management approach. The results show that community in Trao Reef marine has higher awareness, higher compliance, and higher participation to the marine reserve management. These indicators imply that Trao Reef management is performing better than Nha Trang Bay MPA management. URI: http://hdl.handle.net/10037/1983 File(s) in this item: 1
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Zhang, Xiao (Master thesis; Mastergradsoppgave, 12-Jun-2010)[+][-]
Abstract: In the past ten years, China has developed to be one of the most important countries of fishery production field. Annually Chinese fishery products is increasing . In 2009 the total fishery production is 50.4 million tones.(China statistical reports,2009) As the same rate as the increase economy, the sharply development of fishery production is also remarkable. But there are serious problems behind the promising surface. The conflicts between the economic development and ecological and environmental declaration are becoming prominent. The most serious situation is in Yangtze River basin. According to a Chinese governmental report, the total annul aquatic production in Yangtze River is about 20% of total national fishery production. But from the latest 20 years, the fishery biomass situation is continue damaging. How to fix Yangtze River ecosystem is the top priority in fishery management. And how to deal with the fishery of Yangtze River is also the main problem of Chinese freshwater industry. Chinese government has authorized many measures and policies in the last 10 years, but the situation became even worse during this period. Because of the historical and political reasons. Chinese academic levels in fishery economics and management is limited, and the fisheries research is not given enough priority. There is hardly any effective research on Yangtze River fishery resources today. At a global level , a new term is becoming quite popular, within the field of fishery management namely ecosystem-based fishery management. Many foreign countries has implemented this theory into practice and also FAO support this theory as the most important management theory in fishery in the future.(FAO, 2005) The same as many other new theories, there are so many disputes and controversies on this theory. Problems often pointed at are shortage of data and poor knowledge, the theory is still not fully developed. Based on the investigation of the formal management failure in China. We figure out that may be the ecosystem-based fishery management can save the environment and fishery resources in Yangtze River. We are going to analysis the main principles, goals and policies for the fishery management, which is the original in Yangtze River academic research. Good theory needs to be tested by facts. Based on the theory of EBFM in Yangtze River, we chose a small island in Yangtze River to implement the theory . According to the local conditions and new development perspective, we chose Jiangxin island of Nanjing as a research field. We gave management advices for this island and hope it can be a good example that balance the environment profit and economic benefit. This paper will be a operation advices give to the development company of Jiangxin island for the implementation of ecosystem based fishery management on that island. URI: http://hdl.handle.net/10037/2567 File(s) in this item: 1
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Nguyen, Thi Trang Nhung (Master thesis; Mastergradsoppgave, 17-May-2010)[+][-]
Abstract: Planning, implementing and managing MPA not only requires attentions to biological issues which influence the performance of MPA but also to social and economic aspects that can greatly affect the outcome of MPA implementation. This study used data from logbook program over 4 years and face-to-face interview to explore the effectiveness of Cu Lao Cham MPA which is one of 4 MPAs in Vietnam through the performance of ecological (CPUE), economic (income from fishing) and social (perception to the MPA objectives) indicators. Result of study has indicated linkages between ecological, socio and economic issues which often give an insight to direct and immediate feedbacks to MPA and despite the various of problems in management of Cu Lao Cham MPA such as poaching, poor and ineffective enforcement, sustainability…., the performance of ecological, economic and social indicators in this study showed that Cu Lao Cham MPA has achieved a significant amount of success and is one of the few well-managed marine protected areas in Vietnam. This study has also identified a number of indications that the coastal fishery of Cu Lao Cham could be on a transition towards becoming a viable, sustainable characteristic of better-established tropical marine protected areas. URI: http://hdl.handle.net/10037/2539 File(s) in this item: 1
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Akter, Shamima (Master thesis; Mastergradsoppgave, 17-May-2010)[+][-]
Abstract: Since 1997, development of white leg shrimp farming in Vietnam has attracted considerable attention due to its high export potential. Therefore, it is now necessary to assess the annual efficiency performance of white leg shrimp farms in order to improve Vietnam’s aquaculture policy. This paper based on a character sample of 61 white leg shrimp farmers in Khanh Hoa province, representing about 13.2% of such farmers in Khanh Hoa, Vietnam. Using an output-oriented VRS Data Envelopment Analysis, the standard efficiency was measured and then regressed to the farmer characteristics and production environment to identify the determinants of technical efficiency for those farms. The empirical results suggest that socio-economic factors such as education and experience are positively related and experience more significance than education, to the efficiency of white leg shrimp farmers. Some environmental factors, such as more distance from a channel, imply worse results for efficiency in white leg shrimp production. Financial factors, such as the proportion of total costs relative to total income, the proportion of variable costs relative to fixed costs, sales margin and return on asset have a positive effect on efficiency of the farmers. In addition, comparing the technical efficiency results of planned farms and unplanned farms, groups near to the channel and far from the channel, farmers who have a water keeping pond and those who do not have a water keeping pond, it was seen that the unplanned, far from the channel, and non-water keeping pond farms were less efficient than their counterparts. Therefore, this study suggests that there is a strong incentive for planned aquaculture. As it was seen that water sufficiency is necessary for efficient farming, additionally, it is better for a farm to be near the channel. If, however, it is far from the channel, a water keeping pond without culture is recommended. Moreover, having more experience in a cultured system was also suggested as a way to have the desired increase in productivity. Finally, further study about congestion problems, which have not been dealt with in this study, is recommended. URI: http://hdl.handle.net/10037/2518 File(s) in this item: 1
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Vu, Thi Thu Nga (Master thesis; Mastergradsoppgave, 22-May-2012)[+][-]
Abstract: Although Nui Chua National Park MPA is considered as an effective MPA of Vietnam, especially in the involvement of community in management process, an overall assessment of biodiversity, socioeconomic and governance could help managers continue developing the advantages and overcome mistakes. By using relevant indicators, this study stated that abundance of species is somewhat increased, the conservation objective of Nui Chua MPA has been achieved. The livelihood of local communities slightly improved and the tourism provides some alternative livelihoods for households around the MPA. In addition, there is a small reduction in the dependence of fishermen on marine resources due to the rising profits of vessel affected by Nui Chua MPA. Community plays an important role in decision making, monitoring and enforcement in the MPA management. However, the law, policy and responsibilities of stakeholders have been not clear and little support for community’s activities. Those results explain for the necessary of the change and improvement of the management in Nui Chua MPA in future to be more successful. URI: http://hdl.handle.net/10037/4751 File(s) in this item: 1
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Pethiyagoda, Niyomi Ayesha (Master thesis; Mastergradsoppgave, 16-May-2011)[+][-]
Abstract: The primary purpose of this study to understand how the consideration set size affect for consumption frequency of fish in Sri-Lanka. Consideration set size of fish is considered to be affected by consumer attitude, convenience orientation, and consumer knowledge in Sri-Lankan context. Thus, the second objective was to investigate how consumer attitude, knowledge, convenience orientation, variety seeking tendency and price consciousness affect the formation of consideration set size. Based on that, it aimed to suggest a marketing strategy implication for food marketers, in addition with strategy implication for increasing fish consumption. The proposed conceptual frame work was used to achieve the objectives in this study. Thus, the proposed model consisted with the constructs of attitude, knowledge, convenience orientation, variety seeking tendency and price consciousness. This thesis was an extension of Rortveit and Olsen (2007: 2009) study with the inclusion of additional antecedents of variety seeking tendency and price consciousness. The questionnaire survey was carried out in Galle district in Sri-Lanka with the convenience sample of 250 respondents. The measurement scales used here were adopted from previous studies found in literature. The confirmatory factor analysis and structural equation modeling in Amos 16.0 were used as statistical analysis tool. It was found that significant positive relationship between consideration set size and fish consumption frequency as a main hypothesis. Further, this study has found significant positive relationships between knowledge and consideration set size, between variety seeking related to personality and variety seeking related to food and between convenience orientation and consideration set size, while having insignificant relationships between knowledge and fish consumption frequency, and between variety seeking related to food and consideration set size. Surprisingly, attitude has an insignificant effect on both consideration set size and the consumption frequency of food. The main reason for this problem is skewneess of the data set. The study found that that belief of sensory aspects, health and convenience were significant predictors of attitude toward fish. Further this study revealed that price consciousness related to food has a negative significant impact on consideration set size. These findings indicated that from a marketing point of view, being chosen is effected by the size of the consideration set size, food marketers should advocate that consumers consider many kind of fish products in choice occasion. As shown by the study, set size can be increased through the consumer knowledge variable. In such a condition, manufacturer must tend to put in to consumer education which will lead to have a positive impact on consideration set size. From the theoretical point of view, this research contributed to fill the gap in the consumer consideration literature in general, but also to the literature trying to explain fish consumption in Sri-Lanka. A limitation of this study is that the relationship between the consideration set size and the consumption was only tested for the size dimension of the consideration set. Further more, sample is relatively small and they are not statistically representative to the total population in Galle district or Sri-Lanka. Therefore, the results could not be generalized to Sri-Lanka. Keywords: Consideration set size, attitude, convenience orientation, knowledge, and variety seeking tendency and price consciousness, fish consumption, Sri-Lanka. URI: http://hdl.handle.net/10037/3786 File(s) in this item: 1
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Tran, Thi Ai Cam (Master thesis; Mastergradsoppgave, 15-May-2011)[+][-]
Abstract: The first purpose of the thesis is to find how visitors evaluate the quality of different facets or attributes of a destination image of Nha Trang, how satisfied they are with Nha Trang, loyalty intention to revisit and willingness to recommend Nha Trang to others. The second is to investigate what “image” is most important to explain global satisfaction with visiting Nha Trang. The third is to investigate how perceived quality, satisfaction and other motivational or dismotivational factors (e.g., demographic characteristics, variety seeking) influence loyalty intention to revisit and willingness to recommend to others. The survey was conducted in Nha Trang, Vietnam, with sample of 201 respondents. This study found that local food, environment and culture & social factors are attractive to tourists while tourist leisure & entertainment and infrastructure & accessibilty factors are not attractive to them. Tourists felt satisfied with visiting Nha Trang, they have intented to recommed higher than to revisit. Moreover, the study found that perceived quality and variety seeking are significant and positive related to satisfaction, age had a negative influence on satisfaction and intention to revisit, and satisfaction is significant and positive related to intention to revisit and recommendation. URI: http://hdl.handle.net/10037/3782 File(s) in this item: 1
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Xin, Zhou (Master thesis; Mastergradsoppgave, 25-May-2009)[+][-]
Abstract: Over the past decade, China has developed to be the fastest growth market of consumption of Norwegian Salmon in Asia. In addition, Beijing that is the capital of China with over 15 million populations provides great demand in seafood consumption. Understanding consumer’s attitude is the first step to explain the consumption. Meanwhile, some factors (e.g. norms, availability, and knowledge) have been confirmed to influence on the consumption. Therefore, the study applies the theory of planed behavior (TPB) model to explain the consumption of Norwegian Salmon in Beijing. Moreover, the TPB model, which includes four components of consumer’s attitude, subjective norms, perceived behavior control, and intention, has been successfully used in several contexts, including seafood consumption. URI: http://hdl.handle.net/10037/1968 File(s) in this item: 1
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Nguyen, Van Quang (Master thesis; Mastergradsoppgave, 17-May-2010)[+][-]
Abstract: This research estimated the technical, scale efficiency and its determinants of four-eye sleeper (Bostrichthys sinensis Lacépède, 1801) poly-culture in Nghia Hung district, Nam Dinh province, Vietnam. A nonparametric DEA approach were applied to evaluate technical and scale efficiency of farm level using input orientation DEA model. The study was based on the cross sectional primary data collected from 70 four-eye sleeper poly-culture households in Nghia Hung district, Nam Dinh, in 2009. The mean technical efficiency under CRS and VRS as well as scale efficiency were 86.44 percent, 90.24 percent and 95.66 percent, respectively. The difference between TE under CRS and VRS showed that the scale inefficiency existed. Regression analysis was used to investigate relationship between technical super-efficiency as a function of explanatory variables which included age, experience and education level of farm operators, stocking densities of fingerling and tiger shrimp, feed ratio and access into institutions as tranning course and credit. The regression analysis results showed that technical efficiency was influenced positively by experience and the number of year going to school of farmers, the farmer with higher experience and education will be more efficiency performance in aquaculture. Fingerling stocking density was also found positively significant impacted on technical efficiency while feed ratio measured in total feed cost to total four-eye sleeper output influenced negatively significant technical efficiency. Moreover, the empirical results were also found that the number of attendance times in training course of farmer effected positively significant on technical efficiency. The more number of times attending to training course of farmer is, the higher technical efficiency score the farmer will get. However, the others variables as age of farmer, tiger shrimp density stocking and debt ratio (credit) were not found statistically significant impact on technical efficiency in the sample farms. Keywords: Data envelopment analysis (DEA), technical efficiency, four-eye sleeper poly-culture, Nghia Hung, Vietnam. URI: http://hdl.handle.net/10037/2570 File(s) in this item: 1
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Nguyen, Thi Minh Huyen (Master thesis; Mastergradsoppgave, 16-May-2010)[+][-]
Abstract: The value of a coral reef is one of the ways to indicate the success of a Marine Protected Area (MPA) and protected resources. Khanh Hoa has two MPAs with the abundance coral reefs with status quite good and a developing fisheries industry. This paper will examine the link between fishery and coral reef using two models, essential fish habitat (EFH) model and facultative habitat (FH) model. The final goal is to estimate contribution of coral reef in a production function of fishery in Khanh Hoa. The empirical results indicate that the EFH model is better suited in this case than the FH model, so the value of coral reefs is estimated by using the EFH model. With 1 hectare (ha) coral reef, it can be produce for the fishery in harvest about 680 tones, with revenue of 885.001 USD. And benefit from protecting coral reefs after established MPA in Khanh Hoa region is achieved when the implementation of the MPAs has saved 73 ha of coral coverage, with to 243,315 tones of harvest over the period 2002-2008 and amounts benefit of nearly 275 million USD. However, the open access condition in which currently practice in Khanh Hoa is causing damage the coral reefs, and effect negative to the harvest when still increase the effort, thus management should used the policies to reduce the pressure on the coral reef and fishery sector. URI: http://hdl.handle.net/10037/2538 File(s) in this item: 1
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Le, Minh Quoc (Master thesis; Mastergradsoppgave, 15-May-2012)[+][-]
Abstract: Frog is valuable product in Vietnam but the natural frogs are overexploited thus, the new model to raising frog is desired. Many species of frogs are cultured in Vietnam, especially in Ho Chi Minh City, for trial of the adaptive ability of exotic species in Vietnam condition. Recently, the frogs’ species from Thailand and Taiwan are prepotent and spread out Vietnam. Nowadays, frog culture becomes one of the newest industries in Vietnam. With a short life cycle, frog culture is farming as economic efficiency for farmers to get return. However, being a new industry, it is quite hard to manage the supply chain of frog. Developed from 2000, this industry production has been growing up and down many times due to the spontaneous development of farmers. Recently, frog farming has new potential horizon to progress firmly. There are new potential partners from US, EU, Taiwan, etc cooperating with Vietnamese farmers for lasting cooperation. This study tries to apply the theory of value chain to analyse the activities of participants along the linkages of frog farming around Ho Chi Minh City. Moreover, the fluctuation of the final price of this product is the biggest problem of farmers. There are many farmers who have to quit this industry because of the fall of price. Of course, the output price is impacted by many internal and external factors thus I want to point out the causers of the inordinary change of price and suggest solution for that. Supply chain of frog in Ho Chi Minh City is made up by four main actors: The hatcheries, the frog farmers, the whole salers and the retailers. Most of frog farmers are small scale and they raise frog with other aquatic products. Besides, the supporters such as medication, feed suppliers, and processing factories also adhere this chain and build up the added value for the final products of frogs. However, frog processing is not developed in Vietnam thus the export volume of this product is limited. Most of frogs are supplied directly to the market for consumers. This study has represented the map of frog value chain in HCMC, analyzed the cost and benefit of frog based on the data of farmers’ budget and the transmission prices along the chain. The superprofit and low cost of frog culture attract many farmers join in frog industry but the risk of unstable price let them give up quickly. Hatchery farm achieves more than 100% profit from selling juvenile for farmers. The farmers can obtain a profit of 0% to 250% per kg of frog. The net profit of wholesaler and retailers are more stable. About 11% of the frog value is added by the wholesalers and17% value is added by retailers. This study is conducted mostly in Son Ca Farm, Hoc Mon Distreet. Data is collected from many sources, most of them are primary data surveyed by questionares. URI: http://hdl.handle.net/10037/4780 File(s) in this item: 1
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Siddique, Abu Baker (Master thesis; Mastergradsoppgave, 09-Jun-2011)[+][-]
Abstract: Since the 1990’s development of industrial trawl fisheries of Bay of Bengal, Bangladesh has attracted due to its high demand and abundance of fish and shrimp resources. This paper investigates Bangladeshi industrial trawl fishery by employing a bioeconomic model and an input-oriented Data Envelopment Analysis. The fundamental objective of this paper is to provide the technique through which long run sustainability can reach an optimum utilization of the resource efficiently to protect marine biodiversity and regenerate fish stocks. For this purpose, a conventional economic model is used simultaneously with a biological population growth model to develop a bioeconomic model. In order to achieve optimal steady state solutions, i.e., optimum levels of stock, harvest and effort are determined and efficiency is compared for five years. This study demonstrates that engine power, and fishing experience strongly affect technical efficiency. Results show that the Bangladesh trawl fishery is not managed and operated optimally and efficiently. Present situation of high effort level, less harvest amount and less fish stock signifies that the danger of depletion of the resource cannot be excluded . Finally, the study will propose some fishery strategies for Bangladesh, such as banning the inefficient trawlers to protect the resource. URI: http://hdl.handle.net/10037/3785 File(s) in this item: 1
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Nadarajah, Suthamathy (Master thesis; Mastergradsoppgave, 15-May-2012)[+][-]
Abstract: Purpose: The primary purpose of this study was to identify the various quality attributes of shrimp which influence on market price and evaluate the relationship between price and quality attributes. Secondly to point out the main quality characters of shrimp which influence consumer preference and demand in domestic market. Theoretical framework – Based on Rosen (1974) proposed framework, simple linear form of hedonic price model of price dependent variable and combined continuous and dummy explanatory variables was developed to achieve the objectives. Methodology and sampling - Seventy six shrimp observations were collected from a specific domestic market in Nha Trang and price and quality attributes were recorded. Variables used to estimate the model were adopted from previous literatures of seafood hedonic pricing. Hedonic model price was estimated by regressing price on quality attributes using OLS method in Shazam 10.0. A questionnaire survey was conducted using a convenience sample of 130 consumers in Nha Trang, Vietnam and data were analyzed using statistical tool Microsoft Excel 2003. Findings – The results confirm the hypothesis that the market price remarkably influenced by the extrinsic quality attributes of shrimp including carapace length, weight, origin, species freshness, product form and preservation method. Longer carapace length and no discolored shrimp are highly valued. Freezing, although widely practiced, receives the discount among preservation method. Fully cleaned to product form obtains a high premium. Furthermore, study found that some of quality characteristics such freshness, origin, species and size are also considered by consumer beside price which are the attributes influence on the consumer preference and demand. Even though, favourite quality attributes of shrimp vary with consumer, the most of consumers prefer the medium sized, sea-caught and fresh whole shrimp for consumption. URI: http://hdl.handle.net/10037/4752 File(s) in this item: 1
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Khan, Manzura (Master thesis; Mastergradsoppgave, 15-May-2012)[+][-]
Abstract: In the present study, a hedonic model was used to estimate price increments or discount of catfish (Pangasius sp.) due to quality attributes in a domestic market named Natunbazar in Barishal district of Bangladesh. Using price and attribute data obtained by a questionnaire survey from the Barishal Natunbazar fish market, a linear hedonic price model was estimated which includes both continuous variable and dummy explanatory variables. The continuous variables were weight and standard length of Pangasius fish. Dummy variables represented the qualitative attributes which includes freshness in terms of gill color; origin of product; morning or evening; weekday or weekend; mode of sale and type of preservation. The estimated result shows a clear and significant price fluctuation due to the changes of different quality attributes of fish. Larger fish with bright gill color representing freshness were highly valued. Icing was more preferred among the other forms of preservation. Fish produced from local aquaculture practice and weekend day receives discount where fish sold in morning showed the price premium. The empirical finding of this study can explain some implications for those who not only involve with fisheries marketing and management including handling, transportation and preservation procedure but also involving in fish production by intensive or semi-intensive aquaculture practice. Thus, this hedonic approach explained in this study demonstrates the indicators of price fluctuation in fish market about what the fish farmers claimed on. URI: http://hdl.handle.net/10037/4744 File(s) in this item: 1
thesis.pdf (653.0Kb) -
Trang, Le Thi Huyen (Master thesis; Mastergradsoppgave, 15-May-2012)[+][-]
Abstract: Ben Tre is among Vietnam’s 10 most vulnerable provinces to climate change. Thus, in this study we investigated impacts of sea level rise, salt water intrusion, typhoon and erosion on three coastal communes in Ben Tre and corresponding adaptations. Three focus group discussions were conducted to identify impacts of climatic events and vulnerable sectors. The household survey of 300 respondents followed to foment impacts, adaptations, awareness and preparedness of climate change. Cost-effectiveness analysis was performed to evaluate the sea dike and the irrigating system. Findings showed sea level rise is the most worrying which jeopardizes agriculture and aquaculture and forces households’ relocation. Salt water intrusion has immensely hindered agriculture and aquaculture and troubled households’ everyday routines. Losses from the most recent intrusion were USD 77,151. Typhoon Durian, despite of ephemeral presence, resulted in USD 154,155 loss. Erosion appeared to be least serious. Losses from the most recent erosion were USD 77,151. Regarding adaptations, households primarily performed simple actions which reflect financial and technical shortages. The survey revealed that 98% of respondents have no or little knowledge on climate change and 65% have made no preparations. CE ratios indicated that the irrigating system is more cost effective than the sea dike. URI: http://hdl.handle.net/10037/4755 File(s) in this item: 1
thesis.pdf (3.060Mb) -
Hanh, Bui Le Thai (Master thesis; Mastergradsoppgave, 15-May-2009)[+][-]
Abstract: This research provides the first analysis of the relationship between farm financial exposure and technical efficiency in the Pangasius farming in An Giang province, in the Mekong Delta of Vietnam. A nonparametric DEA approach has been applied to estimate technical and scale efficiency scores of 61 Pangasius farms in An Giang province in the year 2008. The mean technical efficiencies under assumption of constant returns to scale and variable returns to scale and scale efficiency were measured to be 0.595, 1.058 and 0.58 respectively. The decomposition of the technical efficiency measure shows that scale inefficiency is the primary cause of technical inefficiency in the the case of Pangasius farming as about 92% of the sample Pangasius farms exhibits increasing returns to scale (IRS). Then, estimated technical efficiency (TE) scores under assumption of variable returns to scale are used in a regression analysis to investigate the relationship between the efficiency measures and different farm characteristics, including financial considerations. Research results suggest that technical efficiency is influenced by investment level of farms as well as by farm operator's experience. The farms are invested more will be more efficient. The experience measured as the years of operator in farming Pangasius also suggests that the farmers having more experience may have better decisions in farm operating and more efficient in using inputs, thus, their farms are more efficient. Technical efficiency is positively influenced by the debt-to-asset ratio and also by the debt-to-equity ratio, while no statistically significant relationship is found between technical efficiency and the bank debt-to asset ratio. The other factors (age and education levels of the houshlod head) are found to have no effects on the technical efficiency in the sample farms. URI: http://hdl.handle.net/10037/1982 File(s) in this item: 1
thesis.pdf (544.9Kb)
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