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Showing 1 to 20 of 68 for “"overfishing"”.
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Overfishing in Senegal: A Deep Dive into the Livelihood of Coastal Communities
… This thesis investigates the impact of overfishing on the livelihoods of artisanal fishery workers in Senegal, focusing on the intricate relationship between fishery management, unsustainable fishing practices, and the socio-economic conditions of small-scale fishery labourers. To …
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The effects of life history strategy and uncertainty on a probability-based approach to managing the risk of overfishing
… probability, P*, of exceeding the "true" overfishing limit (OFL) located within an estimated distribution. The P* methodology aims to manage the risk of overfishing explicitly, but choice of P* alone does not provide sufficient information on all of the risks associated with a control …
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An exploratory approach to social impact assessment of public policy decisions: Multiple stakeholders perspectives on the social impact of overfishing in New England groundfisheries in the 1990s
… methods to analyze a case study of the overfishing and collapse of the New England groundfish fisheries in the 1990s.</p><p>To enact a fisheries management plan amendment, Environmental Impact Statements (EIS, which include an SIA) must be submitted. Agencies use SIA guidelines to carry …
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Growth and Yield-Per-Recruit Modeling of Spot (<i>Leiostomus xanthurus</i>) in the Chesapeake Bay, and a Comparison of Biological Reference Points
… and K makes spot relatively impervious to growth overfishing as determined by yield-per-recruit modeling. Because spot are nearly impervious to growth overfishing, management thresholds based on yield-per-recruit modeling may be inappropriate. In addition, the combination of high M and fast K …
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Influences of the abalone Haliotis midae on subtidal benthic communities
… species that is seriously threatened by overfishing and poaching. This not only affects the species itself but also the integrity and functionng of the ecosystem through associated changes in community structure. I assessed the influence of abalone on the ecosystem by a combination of (a) …
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Status and Contribution of Small-scale Fisheries in Menabe, Southwest Madagascar
… shifting species composition, and indicators of overfishing in the Menabe region, a key fishing area in Madagascar. In Chapter 2: I collated data from eleven villages in the Menabe region of Madagascar over a two-year period (2010–2012). This dataset included 17,000 fishing trips, which accounted …
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Characterization of the molecular genetic variation in wild and farmed Nile tilapia Oreochromis niloticus in Ghana for conservation and aquaculture development
… in the wild, including habitat destruction, overfishing, climate change, and hybridization with farmed populations. Knowledge of the genetic variation among wild populations also can contribute to foundation and selection of genetically diverse populations for aquaculture. I assessed the …
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Unintended Consequences of Enforcement in a Fisheries Institution: Results from an Artefactual Experiment in Tanzania
<p>Overfishing and the destruction of fishing commons in developing countries is a growing problem. Policymakers and local community leaders are looking for solutions to keep their fishing commons sustainable. Fines and enforcement mechanisms are commonly suggested to help preserve the commons. …
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The people and the park : how a small Mexican community created one of the world's most successful marine preserves
… of North America. Once damaged and depleted by overfishing, the reef has seen an incredible recovery since its protection in 1995. This recovery is due in large part to the efforts of the very people who once fished the reef. The adjacent community of Cabo Pulmo, in collaboration with a group of …
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Sea of change
… domesticated by management, depleted by overfishing, shuffled by natural climatic cycles. The future of the gulf will depend not just on the trajectory of ocean warming, but on whether people can rethink the way we use the environment, and adapt to a changing world.
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The biology of the abalone Haliotis Midae
… Subsequently the catch has declined, due to overfishing, and in 1968 canned production fell to about seven hundred thousand lbs. The Division of Sea Fisheries is responsible for managing the exploitation of marine stocks in South Africa. To do this effectively, data are required on the …
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The Politics of Choice and Institutional Development in Global Environmental Regimes
… constructed to address ozone depletion, the overfishing of global stocks, and climate change. Across the cases, I find that dissatisfied actors continuously contest the status quo institutional arrangements to gain distributive advantages. Still, regimes tend to develop in a strongly …
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Effects of Culverts on Brook Trout Genetic Diversity
… range due to a historical loss of habitat, overfishing, and stocking of non-native salmonids. Road culverts have been recognized as an additional impediment to population persistence as movement between diverse habitat types has been identified as an alternative life-history strategy to …
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Microneedles for Drug Delivery in Aquaculture
… food demand from population growth as well as overfishing and other environmental concerns from traditional fishing methods. However, a major challenge in aquaculture is the spread of disease from close quarters of the fish. Current fish vaccination methods include oral, immersion, and …
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Ecological Process in Pattern Generation in Tropical Coral-Seagrass Reefscapes
… drivers may be impacted by threats like overfishing and global climate change or by local protections. Here, we examine the evidence for several hypotheses regarding halo formation and maintenance and propose an integrated model combining fish distributions, herbivory, and nutrients. We …
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Effects of Artificial Reef Implementation on Fish Populations in a Marine Protected Area: Bluefields Bay, Jamaica
Severe overfishing has presented a substantial dilemma in Jamaica. The fish populations within the country's boundaries have been decimated over an extensive period of time. Neighboring Caribbean countries use Jamaica as a worst case scenario as far as fisheries management is concerned. To …
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Fishing for Food and Fodder: The Transnational Environmental History of Humboldt Current Fisheries in Peru and Chile since 1945
… and ecological impacts were wrenching. After overfishing and a catastrophic El Niño changed the course of Peruvian fisheries in 1972, Chile came to dominate world markets by the early 1980s due to shifting marine ecologies along its coast that shaped the trajectory of the ports of Iquique and …
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Genetic Population Structure and Effective Number of Breeders in Systems Across the Range of the Gulf Sturgeon
… lineage that diverged as early as 400 MYA. Overfishing for meat and caviar during the early 1900’s reduced their range and abundance and continued habitat destruction and mortality have limited their ability to recover, leading to their listing under the Endangered Species Act. This study …
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Early Recruitment of <i>Crassostrea virginica</i> to Restored and Natural Oyster Reefs in the Western Mississippi Sound: Larval Supply and Post-Settlement Success
… by freshwater input, hypoxia, predation and overfishing. Consequently, substantial efforts have been dedicated toward oyster restoration within the northern Gulf of Mexico. The overall objective of this study was to consider the role and importance of early recruitment to oyster restoration …
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Determining the Trophic Role of Gulf Menhaden (<i>Brevoortia patronus</i>) Using Carbon and Nitrogen Stable Isotopes
… and adults), these results suggest that if overfishing occurs to the extent that it impacts recruitment, it may decrease the resiliency of the inshore Gulf of Mexico ecosystem to eutrophication by decreasing the abundance of juvenile fish seasonally present in this environment.</p>
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