Now showing items 70-89 of 89
| Abstract: | After dissolution of the Soviet Union, the economical and political changes in Russia resulted into development of the new institutional arrangements and altered the behaviour of all industrial organisations. The new institutional regime and the introduction of the new market-based economic system forced fishing companies to change their business behaviour and find new ways to adjust to the existing situation. The main objective of the Thesis is to show how the higher-order institutions have influenced fishing companies and changed the trade pattern for cod and other species of white fish in the Murmansk Region. In order to illustrate this, one fishing company would be selected as a case-study and the main factors which have led to the significant change of trade pattern for cod and other species of white fish would be generalized and analyzed together with the data applied on an entire Russian North-West Fishery. |
| URI: | http://hdl.handle.net/10037/338 |
| Abstract: | Kapenta (Limnothrissa miodon) was introduced from Lake Tanganyika into the man-made Lake Kariba, where it now supports a large and viable fishery for Zimbabwe and Zambia who share the lake. The challenge for this paper has been to investigate whether the viability of the kapenta fishery is dependent upon biological factor or economic parameters. The Pella and Tomlinson surplus production model (Pella and Tomlinson, 1967) was used, and parameterised by historical catch and effort data in addition to individual growth parameters. 1994 data was referred to as the current data. In the analysis three reference points were used, Maximum sustainable yield (MSY), Maximum economic yield (MEY) and Open access (OA) equilibriums. Prices and costs were varied to see the sensitivity of the fishery to these two variables, based on the reference points. MSY yield and effort which is the same for both countries was found to be 23 336 tonnes and 725 rigs at the age of first capture of four months. MEY yield and effort is 22 854 tonnes and 475 rigs for Zimbabwe and 22 181 tonnes and 500 rigs for Zambia. Resource rent at MSY is ZW$273 000 and ZK26Million and at MEY it is ZW$316 000 and ZK28Million. Current (1994) effort levels were shown to be close to MSY effort levels. OA effort levels are shown to be three times the current effort; trends in the fishery also show that effort levels are on the decrease, indicating that OA is not a threat to this fishery. |
| URI: | http://hdl.handle.net/10037/336 |
| Abstract: | Fisheries in Bohai Sea occur in an ecosystem, with different provinces conducting fishing activities on different species using different gears. Coordination of government actions continues to be a problem, as there exists many contradictions between different sectoral planning approaches. With the absence of a holistic institutional framework of management mechanism, coastal and marine resources are being destroyed. It has been found out in the study that fisheries resources in Bohai Sea, especially traditional high-valued species such as small yellow croaker, hair tail and Chinese prawn, have been over fished, and they have been replaced by some lowvalued species, mostly primarily smaller pelagic species, such as Japanese anchovy, half-fin anchovy etc. The effects on trophic level changes have been caused by mainly due to impacts from human activities and the variation in natural environmental problem like pollution. The CPUE declined from 2.39 tons/ kilowatt in 1950s to 0.91 tons / kilowatt in 1990s. The Bohai Sea being an important spawning, nursery and feeding ground for many migratory species from the Yellow Sea and at the same time supporting an important penaeid shrimp fishery it deemed important to carry out this work. The paper is divided into six sections. The first section is a brief introduction of the physical and biological characteristics of the region. Following is the description of methodology used in this paper. The data used in this study are listed in third section. The next section describes the major fisheries and specie shifts in dominance, and examines of the causes of resource variability are given in section five. Suggestions for restoring the resources of this ecosystem are offered in the final section. |
| URI: | http://hdl.handle.net/10037/340 |
| Abstract: | Ghana’s find of oil and gas in commercial quantities marks the beginning of a billion-dollar industry. The exploration and production of it is a major industrial development but its negative impacts on fisheries can never be underestimated. The research questions to be answered are: how is it likely that the fisheries in Ghana will be affected by the expanding oil and gas activities? What kinds of measures have been introduced to safeguard the fisheries? What can be done to mitigate harms and to secure a peaceful co-existence between the petroleum and the fisheries sectors? Purposive and random samplings were used to select one hundred and eighty respondents in the Cape Three Points community during field survey in the month of June and July 2011. Key informants were interviewed and field observations were also made. The result shows that standard of living of respondents is generally low and they lack social amenities in the community. The general perception of the respondents (75.6 %) is positive because they are expecting the oil and gas activities to boost their livelihood activities and increase income. The majority of the respondents with positive perception are women engaged in fish related activities, petty trading and farming. 36.2% of respondents asserted that the oil and gas activities would bring great loss in the quantity of fish catch. These were mostly fishermen and fishmongers. Even though the 36.2% is quite marginal, it still confirms the assertion that fish catch may reduce. Restriction imposed by naval officials in charge of the rigs, the incident of oil spillage and pollution are other major concern by the respondents. The government is enacting some laws and policies which can safeguard the fisheries if well implemented, however local communities and stakeholder involvement is not adequate. Also the institutions lack the human resources and the capacity to implement these policies. Recommendations are therefore made to ensure peaceful co-existence between fisheries and the oil and gas sector. Keywords: Oil and gas activities, fisheries, mitigation, livelihoods, Western Region, Ghana |
| URI: | http://hdl.handle.net/10037/4356 |
| Abstract: | The marine protected area (MPA) of Nha Trang Bay, in eastern Vietnam, was created in 2002 as a pilot initiative to enable an adequate management of the fringing reef communities, while providing opportunities for alternative livelihoods to the local fisher populations. A reassessment of the data obtained during the baseline survey performed in 2002 and of an inventory performed in 2005 indicates a reasonable decline in faunal diversity and density in the MPA. Multivariate analyses of a great number of species suggest a cascading effect: a general negative trend in the richness of hard-corals at different depths is associated with an increase in macro-algal cover, and this links with a marked decline in the density of herbivorous fish. The reef of Hon Mun, a core zone at the hearth of the MPA and an attraction for underwater tourists, showed some recovery of the coral cover and density of other macroinvertebrates. Despite the loss in fish density, the structure of the fish food web seemed to remain unaltered. Reefs in the buffer area of Hon Mieu and Hon Mot showed, on the contrary, great declines in the faunal component and a clear increase in algal cover. These reefs are those most affected by human derived impacts, including urban run-off, shipping, silting, mariculture, fishing and tourism. The most distant reef analysed, at Hon Tre, although formally a core zone, is allegedly under strong fishing pressure owing to lack of surveillance enforcement. The major impact, so far, seems to be a marked decline in diversity and density of fish. Whilst the present data were collected during the initial stages of marine protection and need further replication, it is becoming evident that urban development and, particularly, fisheries and mariculture, which depend on great amounts of wild seed and feed collected in the area, may become antagonistic activities to the recovery of the reef to earlier states. Managers devising future management plans have now a base for re-scaling the size and zonation regime of the protected area, as well as that of adjacent industrial activities. |
| URI: | http://hdl.handle.net/10037/989 |
| Abstract: | The existing management system in the Russian fishing industry was created as a result of the political, economic and institutional transformations that took place in Russia after the dissolution of the Soviet Union in 1990. This thesis analyses the processes in the fisheries that led to the establishment of the existing institutional and management practice. The study seeks to find out how the existing system of fisheries management has formed as a result of the economic reforms and institutional changes taking place, following the dissolution of the Soviet Union. A special focus of the study is on the division of the management authority between the federal centre and the regions, and the influence of this on the institutional changes in the fisheries. The analysis discusses the validity of hypothesis based on the assumption that the interests, norms, and values of the federal authorities versus those of the regional authorities are the driving forces of the institutional changes in the northern fisheries of the Russian Federation. The study concludes that in addition to the processes that took place inside the fisheries complex the overall transformation of the political and economic order that occurred in Russia was a driving force of the institutional changes in the Russian fisheries. |
| URI: | http://hdl.handle.net/10037/318 |
| Abstract: | Lofoten and Vesterålen is an important fisheries area with traditions for this dating back hundreds of years. At the same time, it has been pointed out as a prospective oil and gas area. The oil industry is currently extending its activities and moving northwards from the North Sea into the Norwegian Sea and the Barents Sea. This has made the seas off Lofoten and Vesterålen a conflict zone. The integrated management plan put a temporary lid on petroleum activity in Nordland VI, Nordland VII, and Troms II until 2010 when the management plan will be up for revision. The topic of this thesis is the conflicts which are now evolving in the region over future developments. The thesis tries to identify the main stakeholders, their arguments and positions, and the strategies they employ to gain support for their views and interests. The game that is played over oil in Lofoten and Vesterålen is analysed in terms of power and conflict. The role of the mass media is also taken into account. The study is based on both primary and secondary data sources. Interviews have been conducted and newspaper editorials, articles, and previous research have been investigated. The thesis shows that there are many stakeholders involved – the oil industry; the fishing industry; the tourism industry; local, regional and national politicians; environmentalist organisations; the media, etc. There is a conflict between different resource-based industries as well as other groups and interests that have a stake in the future development of the region. |
| URI: | http://hdl.handle.net/10037/1471 |
| Abstract: | This study examines the reasons why the European Union (EU), Norway, Iceland and the Faroe Islands have been unable to reach an agreement for the distribution of the Total Allowable Catch for Atlantic mackerel. Whereas the allocation previously was decided by the long-standing coastal states, the EU, Norway and the Faroe Islands, changes in the mackerel’s migration pattern in a northward direction has led to Icelandic and Faroese requests for a larger portion of the resource. The “mackerel conflict” breaks out in 2010 and entails the use of sanctions as well as the setting of unilateral quotas in addition to those following from the coastal state agreement. The combined quota demands far exceed sustainable harvesting levels and will by all likelihood lead to overexploitation. The research methods were qualitative and involved the application of two-level game theory and the consideration of “win-sets” to explain the absence of co-operative management. The main finding was that the pelagic fishers effectively enjoy veto power over the outcome of the negotiations, in particular in fishery-dependent Iceland and the Faroe Islands, but to a large extent in Norway as well. Also in the EU the affected fishers have a decisive influence, although only in political terms. The parties’ many attempts at influencing each other’s positions have so far had no discernable effects and the situation begins to bear resemblance to a “tragedy of the commons”. Key words: Atlantic mackerel, European Union, Norway, Iceland, Faroe Islands, TAC, quotas, conflict, two-level games, tragedy of the commons. |
| URI: | http://hdl.handle.net/10037/3528 |
| Abstract: | The Red King Crab and the consequences of its introduction to the Barents Sea and the North-Norwegian coast has been a source for research in many directions for several years. There has not been much financial research, despite the fact that the Red King Crab is a highly valuable nutritional species which gives it a highly economically value. In this thesis I look into the profitability for the vessels participating in the Norwegian Red King Crab fishery and look upon the challenges which the Norwegian Government faces when managing the Red King Crab. I look into different scenarios for the prevention of the further spread of the Red King Crab to the west is put forward. By using financial analysis and statistical analysis I analyse accounts for vessels fishing Red King Crab and compare them with accounts for vessels with similar sizes and fishing methods fishing in the same area, but not fishing for Red King Crab. My analysing is done for the years 2001 and 2002. After making the different analysis I conclude that the smaller vessels fishing Red King Crab have considerable higher profitability than the similar sized vessels not fishing Red King Crab. For the larger vessels I can not conclude that the Red King Crab fishing vessels profitability is higher than the vessels not fishing for Red King Crab. Fixed quotas equal for all vessels regardless of vessel size and the trouble with unscheduled secondary catch of Red King Crab in other fisheries might be a reason why larger vessels don’t benefit from the Red King Crab fishery as smaller vessels do. I look into the future management of the Red King Crab west of longitude 26º East, which is the western border where the Norwegian and Russian government has agreed to make effort to prevent the Red King Crab to spread further west. There are introduced different scenarios for how to prevent the Red King Crab to spread further west. I have looked into some consequences for some scenarios introduced by the Norwegian Minister of Fisheries like free access to fish in the area as a contradiction to another scenario which is to make strict regime on who is allowed to fish in the area. A third scenario introduced is to make the area a tourist fishery area, and one scenario introducing bounty on the crab, the last one not introduced by the Minister of Fisheries. In my conclusion I am not stating one as better than the others as I don’t believe that one regime can do the job alone. I ask if a combination of the scenarios could be a solution. |
| URI: | http://hdl.handle.net/10037/325 |
| Abstract: | The changing of vessels in the West Coast Rock Lobster nearshore fishery is one of the important issues which need attention within the South African fisheries management, that is, by fisheries authorities and industry (fishing right holders). This is due to the increasing problems regarding frequent vessel changes in the South African fisheries and the consequences in terms of increased fishing capacity. The thesis seeks to find major causes of vessels changes and how often the right holders change their fishing vessels. It further seeks to relate the policies of other fishing nations to gain measures to curb the problem of fishing capacity through the vessel replacement. The data were collected from primary and secondary sources and analyzed by both qualitative and quantitative methods. Various theories of capacity management were used in the study to explain the findings. The findings of this study reveal that transformation in South African fisheries has progressed, and that the fishers have shown development of their enterprise. Fishing nations like Canada and Australia have been used as cases for how to curb the problems. Some of the principles under laying their replacement policies may also be employed in the South African setting. A new and more precise replacement policy is strongly recommended for the South African WCRL fishery. |
| URI: | http://hdl.handle.net/10037/2484 |
| Abstract: | Aquaculture in Ghana has over the years been little productive despite earlier claims about the high potential of the country. These claims are supported by an abundance of latent natural resources that can support large scale commercial production and the existence of a strong traditional market for fish products. A survey of consumer behavior in the local market for tilapia and fish in general was conducted in Ghana. The data were subjected to tabulation and multivariate analysis to assess the availability of market for tilapia and the determinants of its demand among different income earners. Local production according to the survey is not able to satisfy the market. Whereas low income earners and large families are avid fish consumers, it is mostly the relatively small group of high income earners that can afford tilapia at current retail prices. The performance of Ghana was measured in terms of the relative competitiveness of the value chain of tilapia in China, Egypt and the Philippines, as well as with prices on the global market. All the three countries profiled had a cost advantage and this was a result of wide differences in the cost of some factors of production or their relative scarcity in Ghana. The cost of importing fish feed, high interest rate on credit and poor production technology were some of the bottlenecks that greatly reflected on first sale prices. While a kilogram of fish feed for instance cost US$ 0.3 in Egypt and US$ 0.53 in China, the average price in Ghana is US$ 1.96. The export price of frozen tilapia fillet from China is about US$ 1 while the retail price of frozen whole tilapia in Ghana is about US$ 6.5. Tilapia from any of the countries surveyed would be more competitive to that of Ghana not only in the global market but also on the Ghanaian local market given the current price differences. |
| URI: | http://hdl.handle.net/10037/3530 |
| Abstract: | The Ghanaian tuna fishery is a baitboat and purse seine fishery. Three main species of tuna are caught namely, Skipjack, Bigeye and Yellowfin. A detailed and comprehensive set of catch and effort data for the tuna fisheries has been obtained for the period 1980-2001. Harvest functions have been designed and estimated. By maximising the loglikelihood function by numerical methods, parameter estimates and performance indicators of the different models were obtained. The best result was obtained for a harvest model allowing inclusion of a time trend parameter. For this model the stockoutput elasticity is assumed to be 1, the effort-output elasticity is estimated at 0.849, and the technological change at about 3.6% annual increase in productivity. Technical – Economic interactions among the species have been analysed. Different periods where chosen for each period, cross – elasticity of supply calculated between the species. The result indicated a mixed significance, which gives room for the existence of technical – economic interactions among the species over the years, considered. This suggests that single species management may be inappropriate for the tuna fishery. |
| URI: | http://hdl.handle.net/10037/306 |
| Abstract: | Two hake species are caught off the coast of Namibia. These are Merluccious capensis and Merluccius paradoxus, and they are not distinguished between in catches . Two fishing fleets harvest hake, these are trawlers and longliners. In this study, the focus has been on the biological and economic characteristics of two different fishing methods. The Pella and Tomlinson surplus production model was used, and the parameters estimated by applying time series of catch and effort data. Revenue and cost were estimated in order to do an economic assessment of the hake fishery. The results from the model analysis suggests a higher benefits (economic rent) from the longline fishery only, with high catch rates, high effort, revenue. The model indicates that the level of stock from both longlining and trawling are operating under a sustainable level of fishing effort. The maximum theoretical resource rent of the trawl and longline fisheries amounts to N$891 million and N$1,7 billion respectively. However from the current hake stock we will expect a decrease in catch in a long run (trawl fishery) with a stable or even a decreased effort from today’s fishery for Namibian hake to be at the level of maximum economic yield of effort and catch. The higher rent generated by longliners is due to the high price they receive for their landings which is usually exported; and the different selection pattern from the two fishing fleets. Thus, a difference of N$802 million will accrue to longliners according to the model results. |
| URI: | http://hdl.handle.net/10037/312 |
| Abstract: | This study explored possible factors linked to the instability of the stock biomass of Namibian horse mackerel Trachurus trachurus capensis (Castelnau 1861) in recent years (2001-2007). The major focus of the analysis was the contrast of stock traits in years of low and high stock biomass, as perceived from research cruises performed annually between February and March. Stock traits analyzed included: recruitment and year class composition; spatial distribution of the stock; variations in fish body-mass condition and reflections on stock biomass; and maturation patterns and influences on spawning stock biomass. An additional analysis, also based on secondary data, explored the changes in effort capacity, activity and efficiency of the fishing fleet over a longer period of time. Fish 0-3 years old dominate the stock at present, and the modes of the fish size composition appeared to be fairly stable along the years. Thus, length-growth seemed to proceed unaffected by changes in stock biomass. There was, however, a marked affluence of pre-recruits in the years of high stock biomass. Thus, stock biomass was related to recruitment (measured as fish <12cm), which varied by a factor of 20 between the years of high and low stock biomass. Study of the fish allometry showed a trend of decreasing b (exponent) and increasing a (proportionality constant), and this trend seemed to be temporal rather than density-dependent. This seemingly resulted in better condition of the fish, and increased stock biomass by up to 14%. Most of the fish during the survey period were found to be maturing. But, there was a strong declining trend in the calculated size at maturity, which did not seem to be immediately related to stock density. This resulted in a compensatory increase in the calculated spawning stock biomass with time. The spatial distribution of the stock has largely expanded after a reflux in 2002. This does not seem to be directly related to stock biomass, and may conceal migratory fluxes to/from a southern stock. The fishing fleets may have become more efficient at catching the fish, as the reduction in the fishing capacity is not reflected in the catches. Further, the nominal catch per unit effort showed stability and failed to reflect the decline in stock size, particularly in the last years of the series. The surveys seem to underestimate the occurrence of bigger sized fish, as compared to the midwater trawler fleet that more efficiently target the spawning stock. Contrastingly, purse-seiners efficiently target 1-year old fish. The catches of the different life-stages of horse-mackerel by both fleets seem to form a large phase-cycle that is partly conditioned by the occurrence of another species, the pilchard, and, thereby, by transference of effort of seiners between stocks. Rather than a single-species approach, a more strategic approach to management would probably be to consider a fishery system composed by two-prey and two-competing fleets, linked by strong economic and technological interactions. |
| URI: | http://hdl.handle.net/10037/2003 |
| Abstract: | A resource management system combines a set of regulatory scheme within a particular resource to achieve a management outcome. The effectiveness of these regulatory measures depends on the support gained from the resource user group and the way they themselves define their problem, their involvement in the decisionmaking process, in installing and enforcing the regulations. Through semi-structured interviews, this study investigated what resource users think about: the status of stocks and the reason for any change, fisheries management issues and measures and management in partnership on Lake Zeway fisheries. It is found out that sample respondents understand and agree the resource is in undesirable state mainly due to increasing number of fishers and/or gears beyond the capacity of the lake, use of small mesh size/fishing for juveniles and on the breeding grounds. They expect a continued pattern of decline unless some possible measures undertaken to curb the problem. Respondents are, for most part, supportive of management. Most of them understand the importance of the variables that management can manipulate and agree on some fundamental element of a common management strategy but lack incentive for compliance due to the absence of property right. Moreover, they showed motivation and willingness to share management responsibility with fisheries officials. Consolidation of the community coupled with local control of resource base access and active involvement in the management thereof, are important ingredients for achieving true success – i.e. long term sustainability – in the exploitation of the fishery resources. |
| URI: | http://hdl.handle.net/10037/304 |
| Abstract: | In recent years increased attention has been focussed on fish vaccines and vaccination against diseases in farmed fish. In this study, efficacy and side effects of vaccination against atypical furunculosis in Atlantic cod (Gadus morhua L.) were studied in an experimental trial by using different adjuvants. The different adjuvanted vaccines were administered by intraperitoneal injection (i.p.) to Atlantic cod. The adjuvants used were CpG DNA, Aluminium hydroxide (Alhydrogel), and Freunds incomplete adjuvant (FIA). Efficacy of the vaccines and side effects were determined 12 weeks post vaccination, whereas serum antibodies were measured 15 weeks post vaccination. Vaccination of Atlantic cod against atypical furunculosis protects the fish and elicits specific antibody responses to experimental infection with atypical A. salmonicida. The atypical A. salmonicida bacterin alone resulted in very good protection (RPS=75%), and addition of adjuvant alone or in combination did not improve the protection significantly. This indicates that Atlantic cod can be protected against atypical furunculosis through non-adjuvanted vaccines. The injection of FIA alone gave non-specific protection, while the adjuvants CpG DNA and Aluminium hydroxide did not give any non-specific protection. The group, which received CPG DNA alone, had a higher mortality (57%) than the saline control group (53%). High specific antibody responses were demonstrated in all groups vaccinated with A. salmonicida bacterin. The responses were strongest in the groups, which received A. salmonicida in FIA. The study also assessed the side-effects 12 weeks vaccination. The vaccines containing FIA showed the most sever side-effects among the vaccinated group. Aluminium hydroxide showed a less degree of the intraabdominal side effects compared to FIA, but a delay in fish growth was observed. |
| URI: | http://hdl.handle.net/10037/330 |
| Abstract: | Women play important roles in the Ghanaian fishery. This thesis focuses on the roles of women in the Ghanaian fisheries and their means of raising capital to finance their activities. The roles played are broadly categorized as an intermediary one linking fishermen and fish consumers. The women offer financial assistance to the fishermen in times of need and this has led to a strong relationship between the women and the fishermen. To perform this intermediary role, the women rely on relationships they have with the fishermen and existing fish traders. This is due to the difficulties they face in accessing formal credit from the bank as a result of lack of collateral. The findings of this study indicate that social capital plays a very important role both in the raising of capital for the fish trade and the performance of the role as intermediaries. Success in the fish trade has earned the women a prestigious status in the society and their financial success affords some of them the ability to own and control fishing equipment. The influence they possess in the fisheries through the interdependence between them and the fishermen is what makes this category of women different from their counterparts in other parts of the world. Theories used in this study include the middlemen theory, social capital, principal agent theory and micro finance. Key words: fish trade, intermediary, social capital. |
| URI: | http://hdl.handle.net/10037/1003 |
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