Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 86 for “"fish stocks"”.
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An improved mixed-error non-equilibrium stock-production model and its application to some Brazilian fish stocks
… and has been applied to data from some Brazilian fish stocks. The weighting ratio between process and observation errors has proved to be a crucial factor in determining the model results, and a fully satisfactory method for selecting this ratio is still required. Sensitivity analyses conducted …
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Advances in modelling the effectiveness of Marine Protected Areas (MPAs) to enhance conservation management of mobile fish stocks.
… been proposed as beneficial for conservation of fish species and as fisheries management tools. However, there is lack of consensus about the benefit of MPAs for mobile species, which are under-represented in the literature. Empirical data in this field are lacking for mobile species so …
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The historical fisheries in the Mediterranean Sea: A reconstruction of trawl gear, effort and trends in demersal fish stocks
… of the largest compilation of historical fisheries information existing in the Mediterranean region. The goal first here was to quantify historical trawling effort. This shows that Mediterranean demersal communities underwent a much longer and more systematic exploitation than previously …
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Enforcement Measures Relating to Straddling Stocks - An International and South African Perspective
On 10 March 1995, Canadian fisheries authorities boarded and arrested the Spanish fishing vessel, Estai, outside the Canadian 200 mile Exclusive Fishing Zone on the Grand Banks off the coast of Newfoundland alleging that the vessel was fishing in breach of the Northwest Atlantic Fisheries …
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South Africa's implementation of the European community regulation to combat illegal, unreported and unregulated fishing
Illegal, unreported and unregulated (IUU) fishing has become a worldwide challenge facing fisheries in the 21st century. IUU fishing has the effect of undermining existing management and conservation measures at a national, regional or international level. In addition, IUU also defeats the purpose …
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An analysis of the socio-economic impact of illegal, unreported, and unregulated fishing on Somalia's coastal communities.
Illegal, unreported, and unregulated (IUU) fishing poses a significant threat to the socio-economic fabric of Somalia's coastal communities. This study employs qualitative research methods, including interviews and field observations in the districts of Eyl and Garad, to comprehensively analyze the …
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The commercial beach-seine fishery in False Bay, South Africa
… lobby that the commercial beach-seine fishery in False Bay was jeopardizing fish stocks and detrimentally affecting the ecology of the Bay. Its main aims were to quantify the current catch and place it in an historical perspective, to describe seasonal patterns in catches and effort and …
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Modelling changes in the growth, maturity, and abundance of fish in Scottish waters
The quantity of fish that may be sustainably harvested from the oceans depends uponhow abundant they are and, less obviously, on their rate of growth, the sizes they can attain and the sizes at which they begin reproducing. This thesis investigates whether fish stocks in Scottish waters have …
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The Portfolio Analysis for Multi-species Fisheries Management in New Zealand: An Application in a Fishing Firm
… of marine species and the sustainability of fisheries development have become critical issues in current scientific research due to over-harvest. The traditional method used to manage fisheries is the single species approach where policy is aimed at maximum sustainable yield. However, with …
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Ecology of the pelagic fish resources of Lake Tanganyika
Most of the scientific knowledge on the pelagic fish (the clupeids Stolothrissa tanganicae and Limnothrissa miodon and the centropomid Lates stappersii) of Lake Tanganyika is from research carried out in localised areas. This makes it difficult to extend the results to the whole lake. Consequently, …
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Comparing activity restriction and habitat creation approaches in Marine Protected Areas (MPAs): a Bayesian belief network model approach
… Whilst typical MPA usage restrictions such as fishing bans are often effective for ecological success, such approaches can fail in meeting socioeconomic objectives due to negative impacts on the livelihoods of those dependent on MPA resources. These issues can further reduce MPA effectiveness …
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Misunderstandings in fisheries: an ethnography of regulative categories and communication around Gansbaai and Dyer Island
… context of wide-spread, world-wide declines in fish stocks, such as the inshore fishery in the Benguela ecosystem along Gansbaai, fishers in Gansbaai partly rely on the availability of small pelagic fish (sardine and anchovy). However, fishers also hand-line and angle actively, and more recently …
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Exploitation and management of the artisanal fisheries in the Ugandan waters of Lake Victoria
The fisheries resources of Lake Victoria support the livelihoods to the lakeside rural communities and are vital to the economies of Kenya, Tanzania and Uganda, especially through fish exports. Management decisions to enable long-term sustainable exploitation of these fisheries require appropriate …
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Evaluating Alberta’s Fall Index Netting Protocol for Assessing Northern Pike (Esox lucius) Populations
… of FIN monitoring. These tests used fisheries survey data on 133 lakes collected between 2000 and 2020. Mark-recapture studies and angler surveys were paired with FIN surveys done in the same year. We found that 1) FIN catch rates were related to Northern Pike population density, 2) …
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Comparing estimates of fishing effort and lake choice derived from aerial creel surveys and smartphone application data in Ontario, Canada
… make decisions that have consequences for the fish stocks, ecosystems, and socio-economics with which they interact. Smartphone angling applications (apps), are a potentially less expensive and more comprehensive data source than conventional methods, but their utility has not been evaluated. …
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Assessing Vulnerability in Households and Communities Involved in Fisheries Sector Activities
Global fisheries are in decline in response to intense pressure to feed a growing world population. Many of the world’s fisherpeople live in poverty and suffer disproportionately from this threat to global fish stocks due to competition for resources among other stressors. In recent years the …
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BOAT SHELTER AND FISHERY IN HAI DUONG COMMUNE : PROTOTYPE INTEGRATING COASTAL PROTECTION AND WAVE ENERGY INFRASTRUCTURE IN CENTRAL VIETNAM
This thesis looks at designing a fishery and a boat shelter integrating coastal protection and wave energy conversion on the vulnerable coastline of Central Vietnam (Thua Thien Hue). It suggests how structures can be integrated to encourage the growth of natural defense mechanisms against strong …
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Notes on "Camping" : vacationing in Fairmount Park
… the right varieties of vegetation, constant fish stocks in a polluted river, purposeful insect infestations, etc. If this presentation of nature is wholly synthetic, can it be re-imagined as an architectural project? Modern architecture adopted the conditioned interior as a means of isolating …
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A genetics-based approach for the determination of Phalacrocorax auritus diet on Lake Nipissing
… as a possible cause for the decline of these fish stocks. Using a combination of molecular and bioinformatic techniques, I have developed a non-invasive genetics-based method for the determination of Double-crested Cormorant (DCCO) diet using the 16S ribosomal RNA gene. I observed general …
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Fisheries management and flags of convenience
The over-exploitation of the world's fish resources and the depletion of many fish stocks have brought into focus the need for effective fisheries management and conservation measures. Many states have adopted international instruments or have participated in regional conservation committees to …
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