Published February 1996. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Riparian areas in the Pacific Northwest have traditionally been a source of natural resources, such as timber and grazing, and have been used as transportation corridors and homestead sites. A primary impact of use has been the removal of riparian trees, the crowns and roots of which provide shade and...
The state of the world at the beginning of 21 century is terribly bad from all points of views such as environment, food supply, resources, economy and security essential for human survival. Our civilization based on technological development and mass consumption has been using up all resources on land and...
Fisheries management has been carried out on the assumption that a fish population is in equilibrium with the fishing effort under the average environmental conditions and hence there must be a maximum sustainable yield (MSY). However, since the simultaneous rise and fall of the interdecadal and global scale of sardine...
The inclusion of ecosystem considerations in fisheries management implies two changes with extensive institutional repercussions: the uncertainties about states and outcomes rise dramatically and a multiplicity of new stakeholders, interests and objectives must be accommodated in the management institutions. The first change may potentially add immense costs to the management...
There is increasing awareness of and concern about the actual and potential adverse effects of fishing on the aquatic environment. New Zealand, like many other countries, has developed a range of initiatives to address specific issues related to the effects of fishing, including establishing marine reserves, fishing method restrictions, observer...
This paper looks at some of the seemingly positive developments in fisheries governance over the last twenty-five years. It asks why fisheries management, if improving, is still failing in its basic objective of managing the people who catch fish so as to ensure that there are enough fish left out...
Traditional approaches to fisheries management, which have been singular, species-based and non-sectoral, have failed to protect the world’s fisheries resources. This has resulted in the overexploitation of fish stocks, displacement of fishing fleets and dislocation of fishing communities. The first attempts at international regulation of fisheries were simple, but premised...
Seven economic instruments including property right regime, tradable permit, bond and deposit refund, liability, fiscal instrument, financial instrument, and charge system were considered for rehabilitations of coastal resources including mangrove, coastal water, coral, sea grass and seaweed, tourism, and fishery resources. Criteria on selective economic instruments were previous practice, management...
New Zealand marine recreational fisher’s attitudes to their fisheries and fisheries management are discussed in the light of the findings from two studies. The first study, a national telephone survey of more than 600 fishers, investigated why fishers seek to go recreational fishing and their attitudes towards the fisheries management....
Managing fisheries resources according to an ecosystem approach is an idea that emerged from science and ecology and has now found its way into the international regulation of regional and high seas fisheries. Several fisheries agreements now impose an obligation on states to consider the protection of marine ecosystems. The...
The high ecological, social and economic value placed on Western Australia’s aquatic environment creates a significant obligation on the WA Department of Fisheries to develop and implement appropriate and sustainable resource management strategies for the State's fisheries and fish habitats. Historically, fisheries management in Western Australia has been based on...
Over the past 50 years, most efforts to regulate fishing and conserve our oceans and seas only have had limited success in preventing the on-going problems of over-fishing, degradation of the marine environment, and irreversible loss of marine biodiversity. Ecosystem-Based Management (EBM) of the oceans is an approach that is...
Marine ecosystems are generally more extensive and complex than terrestrial ecosystems. Our understanding of the ecological relationships and biological processes within marine ecosystems is rudimentary but improving. In addition, our appreciation of the range of goods and services available from the marine environment and demand for competing economic uses of...
This paper explores the issue of using marine reserves in combination with quotas as fisheries management tools. The underlying biological dynamics are described by a patchy environment model, in which a metapopulation is built up by linked sub-populations that are distributed across a set of spatially discrete habitats or patches....
In 1998, the National Marine Fisheries Service (NMFS) launched a series of marine recreational angler expenditure survey in the Northeast (NE) management region (Maine, New Hampshire, Massachusetts, Rhode Island, Connecticut, New York, New Jersey, Delaware, Maryland, and Virginia). This series was extended to the Southeast (SE) management region (North Carolina,...
At a hearing about the Green Paper (an analysis of the EU fisheries policy over the last 10 years and an outlook for the next decade) the following statement was given by an economist: „The Ecosystem Approach is the fata morgana of the fisheries biologists.“ Indeed, a lot of biologists...
In 1998, the Florida Keys National Marine Sanctuary initiated the “Tortugas 2000” planning process that would lead to the eventual designation (2001) of the largest marine reserve in the US: The Dry Tortugas Ecological Reserve (DTER). This resulting research, targeted commercial fishermen operating in the DTER region, determining the total...
The concept of an ecosystem approach to fisheries management (EAF) is reaching a point of general acceptance by those involved in fisheries. There is also growing agreement that fisheries management must incorporate the complicated and often not-well-understood links between human activities and the environment. As a primary goal of an...
The wide expanse of the sea, the inter-linkages among, and the productivity of its resources have until recently led most researchers to consider it unrealistic that humans could have more than local impact on marine ecosystems and their biodiversity. This perception is changing, however, as more evidence of the scale...
Earlier this year a White Paper from the Norwegian Minister of the Environment presented a new, holistic, area-based management plan for the Norwegian part of the Barents Sea, including the Fishery protection zone around Svalbard. The plan will provide guidelines for managing human activities in relation to their use and...
The Norwegian government has recently put forward a white paper concerning the management of the red king crab in the Barents Sea. The crab is an introduced species in the Barents Sea. The motive of the introduction was to improve the economy of the Russian coastal fisheries, as the crab...
Increasingly fishery managers are expected to take an ecosystem approach to fisheries management that accounts for the interrelationships of target species as well as non-target species and habitat. Fishery managers would benefit from coupled ecological-economic models that includes both the human and ecological aspects of the fishery and incorporates them...
Though the basic purpose of MPAs is marine ecosystem conservation, the question of their influence on the local economy is often critical since it governs their social acceptability. This paper addresses the
problem of measuring the local economic impact of MPAs, on the basis of a comparative analysis of socio-economic...
This paper addresses the impacts of climate change on salmon fishery governance in the Columbia River Basin of the Pacific Northwest U.S. Here the physical and ecological effects of climate change are expected to be significant and to include alterations in freshwater and marine aquatic habitat that will affect the...
It is widely accepted that in sea bottom areas where there is a scarcity of rocky formations and declining marine fish due to fisheries pressure, the deployment of artificial reefs (ARs) is a possible way to mitigate the problem. If ARs have an ecosystem-based fisheries management goal that means their...
This paper focuses on the consequences of managing small-scale fisheries without consideration of geographical differentiation in reproductive potential through a species range. Because fishing costs
increase with distance, the alternative port locations are predicted to have substantially different impacts on biological and economic performance variables when there are no spatial...
A new conceptualization of sustainability in fisheries is emerging from much broader developments in natural resource management. In its modern form, "resilience" has become a powerful metaphor for sustainable development but advances in theory have yet to be translated into more resilient aquatic ecosystems or better lives for poor fisherfolk...
Recently the ecosystem based management have been dealt with in management as a useful approach for fisheries. The goal of ecosystem-based management are sustainable management of fisheries and other marine resource through establishment of well-managed network of marine protected areas. Despite a number of benefits from marine reserve such as...
The Coral Triangle Initative is a new initative in environmental ecosystem management which as officially kicked-off by 6 countries in December 2007. The paper reviews the history of the initiative (transboundary international "Peace parks" concept, bringing together other eco-regional initiatives) and points to the direction it is currently taking with...
Up to now cost measurements in the Senegalese demersal fisheries have been limited to the assessment of the financial viability of fleets or the comparison between revenues of the fleet and costs of the management. But all of these works are only concerned with the financial cost of fishing activity....
There is growing recognition worldwide that the impacts of fishing on non-targeted components of marine ecosystems should be included in the assessment of fisheries sustainability. This leads to the inclusion of new constraints in evaluations of the long-term bio-economic performance of fisheries. In this paper, we analyze the implications of...
There is increasing concern among fisheries scientists and managers over
the ecosystem effects of fisheries exploitation. This concern has been
motivated by several publications inferring that the structure of marine
ecosystems has been dramatically altered by historical patterns of fishing.
Among the most cited studies is the paper by Pauly...
Every fish species is part of a complex ecosystem which competes with
other species for resources. Likewise, the harvesting of fish species often
involves technological interactions which results in catching multiple
species as well as temporal interactions between species as fishermen
allocate their effort across multiple fisheries over the course...
The coastal ecosystem of the Pearl River Estuary (PRE) has been overfished and received a high level of
combined pollution in the past decades. The fisheries stock assessments have shown a declining
population and have led to a number of management measures, including fishing moratorium. This study
evaluated the effect...
The ecosystem approach to fisheries (EAF) challenges the sustainable
management of resources at an ecosystem level facing human well-being
and environmental health. Here we describe how economic analyses may
fill important knowledge gaps for such a challenge when regarding a
broader multispecies context, e.g. tracking signals of change in ecosystem...
In ecosystem-based fishery management, the ecosystem comprises the
natural sub-system and also human components, including user groups,
institutions and the processes of management. Regional Fishery
Management Organizations (RFMOs), particularly those designed to
manage tunas, were not established with an ecosystem view of the pelagic
environment. However, tuna RFMOs have evolved...
Human adaptation to change is an essential determinant in the resilience of complex social-ecological systems. In the field of water policy and management it has become increasingly clear that traditional government actors cannot fully address emerging water problems at every scale given a demonstrated lack of resources, increasing variability in...
Ecosystem based fishery management has moved beyond rhetorical statements calling for a more holistic approach to resource management, to implementing decisions on resource use that are compatible with goals of maintaining ecosystem health and resilience. Coupled economic-ecological models are a primary tool for informing these decisions. Recognizing the importance of...
Ecosystem externalities arise when one use of an ecosystem affects its other uses through the production functions of the ecosystem. We use simulations from a size-spectrum ecosystem model to investigate the ecosystem externality created by fishing of multiple species. The model is based upon general ecological principles and is calibrated...
This study investigates optimal catch of Barents Sea stocks, namely Northeast Arctic Cod and Capelin in multispecies ecosystem. We solve a multispecies age structured bioeconomic model for predator-prey interaction. Barents Sea stock data from ICES are employed for model application. Among others, we also include sustainability constraint in the model...
The paper puts forward a model of the Pearl River Delta (PRD) fishery in the South China Sea that integrates the ecological, social and economic costs and benefits of fisheries activities in a multidisciplinary framework. In particular, In particular, we developed integrated model by linking a regional Social Accounting Matrix...
Fisheries sustainability is a much sought-after goal. Yet, “sustainability” is often too ambiguously defined to be of much practical guidance to policymakers. Furthermore, fisheries managers are increasingly expected to assess and manage fisheries in an “ecosystem-based” manner – accounting for the ecological interdependencies of species and their coupling with the...
Multispecies fisheries pose a considerable management difficulty with respect to quota allocation between species. Externalities of direct control over the harvest may include, among others, creation of unbalanced predator‐prey relationships in the environment. That, in turn, may affect the individual economic incentives of fishing vessels. Combining economic and ecological factors...