The Australian Harvest Strategy Policy requires that maximum economic yield (MEY) be the target in all Commonwealth managed fisheries. For multispecies fisheries, unlike single species fisheries, the optimal yield is not independent of the optimal yield of the companion species (i.e. those species with which it is caught). In fisheries...
Fish farming play an important role in the Brazilian household agriculture, in terms of food security and income generation. However, smallholder fish farmers are facing challenges to access markets and they are struggling to maintain a sustainable position in the chain, given the difficulty in producing a competitive cost and...
Shrimp aquaculture is one of the fastest growing economic activities in the coastal areas of Bangladesh and earns substantial foreign exchange for the country. However, the environmental degradation is a major concern for the sustainable development of this industry. This paper studies the tradeoffs between the economic and environmental performance...
The Sydney rock oyster (SRO) industry is located on Australia's east coast and is one of the country's oldest farming industries. This industry has been affected by a range of challenges over the past decades, which includes reoccurring disease outbreaks, the management of food security, biodiversity and environmental degradation risks,...
Inland fisheries in Mexico represent a source of protein, income and employment, for rural communities. Although the most consumed fish in the country are fresh water fishes in the national statistics they only account for 3% of the total fish catch volume (marine fisheries account for 97%). Demand is higher...
Abstract
Flame-retardants (FRs) generally enter the environment by dissociating from the products they were originally manufactured into. The predominant class of FR used in consumer products before their eventual phase-out in the mid-2000s were the polybrominated diphenyl ethers (PBDEs). Previous studies have illustrated a correlation between socio-economic status, notably gross...
This research develops a spatially-explicit model of recreational angler participation in an effort to predict outcomes for the US summer flounder (fluke) fishery under alternative climate scenarios, and inform adaptive management approaches. The mid-Atlantic coastal waters of the US have experienced significant warming in recent years, resulting in noticeable pole-ward...
There is a considerable amount of work done in transboundary fisheries and the implications of non-cooperative scenarios using game theory; there is also plenty of research about Marine Protected Areas (MPA) and their role on improving biomass, fishing yields and fishermen profits. However, there is still a lack of studies...
Researchers from the Pacific Coastal Ecology Branch, Environmental Protection Agency in Newport presented results of multi-year cruises as will other time-series data.
Spiropyrans are a family of photosensitive molecules their hydrophobic properties when irradiated with light. Since spiropyran can be controlled by light, it can be used to regulate transport across membrane media. The ability to control the release of a substance onto a platform is promising in reducing the cost of...
Payments for ecosystem services (PES) are positive incentives offered to producers or resource owners in exchange for the provision of a given ecosystem service, such as biodiversity, water regulation, food, recreation and tourism. Interest in applying this economic instrument within the aquatic ecosystems has increased alongside a growing interest in...
Lake Chad is an important fish supply centre in the semi-arid zone of West Africa. Processed Fish Trade (PFT) has catered neighbouring countries for a long time. However, Fresh Fish Trade (FFT) boomed due to severe droughts between 1970 and 1994, by which the PFT main fish species were replaced...
Anchovy fisheries in Indonesia faces a declining state in the next decade. This research investigates some factors contributing to a reduction of anchovy resources. It was carried out in Krueng Raya Bay-Aceh from September to October 2012. Survey and interviews were implemented to explore the state of anchovy. Primary and...
Marine Team is a student effort to examine spatial and temporal variation of fish species within Yaquina Bay. Marine Team was developed at OSU as a seminar course with a field sampling component, to help students of marine ecology get “hands on” experience with data collection and analysis. We set...
Status (as of 2006):
The current weather station has been in operation at HMSC since 1996. The weather instrument sensors are mounted on and under the roof of the Guin Library. The sensors are made by Davis instruments, a leading manufacturer of home quality instruments.
Up to the minute current...
Multispecies fisheries pose a considerable management difficulty with respect to quota allocation between species. The applicability is to single vessel and its individual quotas, as well as to the fleet as a whole. Negative externalities may be created if Total Allowable Catches (TACs) are not set in optimal proportions. That...
This study suggests an optimal harvest policy for Barents Sea species, namely Northeast Arctic Cod (Gadus morhua) and Capelin (Mallotus villosus) in the multispecies ecosystem. We have solved a multispecies age structured bioeconomic model for predator-prey interaction. Barents Sea stock data from ICES (International Council for the Exploration of the...
"Infrastructure facilities of landing sites, which are the core of the fishing industry in Sri Lanka, were severely damaged by the tsunami in December 2004.
Currently these facilities are being rebuilt in association with various non-governmental organisations. At present there are large numbers of small anchorages which require development of...
Tuna management in the Western and Central Pacific (WCP) is complicated given the dynamic and sometimes conflicting interests of participating countries and actors exploiting the tuna resource in the region. Pacific Island Countries (PICs) through the Fisheries Forum Agency (FFA) and the Parties to the Nauru Agreement (PNA) have developed a...
The Speckled dace (Rhinichthys osculus) is the most widespread minnow in western North America (Gilbert and Williams, 2002). It has diversified widely across its range—both morphologically and genetically—and as such might rightly be called a species complex. Our ongoing work aims to determine where boundaries between potentially undescribed species lie...
Firemaster 550 (FM550) is an additive flame retardant mixture used within polyurethane foam and is increasingly found in house dust and the environment due to leaching. In this study, we sought to investigate mono-substituted isopropylated triaryl phosphate (mITP), a major component of FM550, which has been shown to cause cardiotoxicity...
Oregon White Oaks (Quercus garryana) were once abundant in the Willamette Valley, Oregon, but have drastically decreased because of fire suppression, agriculture, and human development. Oaks are an important ecosystem because they provide a diverse habitat for bird species that are insectivorous and/or cavity nesters. We studied the oak restoration...
Tropical and sub-tropical coastal and estuarine ecosystems are complex, dynamic systems that are important in providing numerous ecological services. Globally, these ecosystems are threatened by anthropogenic activities and climate change and these, together with their complex nature, makes management of tropical and sub-tropical coastal and estuarine ecosystems difficult.
Ecosystem models...
Bycatch reduction policies, traditionally focused on command-and-control at-sea measures, can be reframed to a broader-based biodiversity conservation and ecosystem management strategy. More cost- and ecologically-effective bycatch mitigation measures may directly and more effectively increase impacted populations elsewhere in their geographic range or life cycle. At-sea bycatch reduction faces diminishing returns...
Individual transferable quotas (ITQs) have been used in several countries worldwide to regulate access to marine fisheries. While ITQs can improve the economic efficiency of fisheries, in practice their application rarely has the expected effects. In this study we compare the output predicted by an individual based model of quota...
When different species are caught together in mixed-fisheries but are managed under single-species management plans may lead to TACs of some species being exhausted before other. This leads to conservation and socio-economic problems in fisheries, where agreed harvest levels cannot be obtained for some stocks, while other stocks may be...
Fish consumption accounts for about 45% animal protein consumption in Nigeria, currently capture fisheries and the various value chain ( especially its marketing and distribution ) for fisheries and aquaculture products is a vibrant and dynamic commercial sector in Nigeria, ripe with investment and employment opportunities. Marketing of fish and...
The fisheries sector is one of the world’s most globalized food producing sectors with almost 40 % of total production now entering international markets. Trade has a particular relevance and importance for developing countries who represent more than 50% of global fish exports thereby generating important benefits in terms of...
For decades, the management of the Dutch flatfish fishery has included a variety of measures including individual transferable quotas (ITQ) and the implementation of a co-management system without succeeding in recovering the fishery to sustainable levels partly because of the multispecies aspect of the fishery with the two main commercial...
For US aquaculture industry, primary factors influencing their competitiveness are consumers' perceptions of long-term health risks related to domestic farmed seafood consumption. The public is often particularly sensitive to food risk scares, and can often dominate other considerations in food choice and lead to large impacts on consumption and the...
Despite substantial technological developments over the last two decades, incidental catch of charismatic species still occurs in many world fisheries. Short of ceasing fishing activity, some bycatch is inevitable. In some cases, populations of these species are at low levels, and in several instances the species have been listed as...
Since the 1990s Pacific island countries have been host to a plethora of projects to improve the management of coastal marine environments. Some of these have been about strengthening Indigenous and community-based forms of resource management. Some have been about building government capacity and strengthening legislative frameworks. Marine Protected Areas...
International seafood trade takes place through value chains that link production in developing countries to developed country markets. As a result of the emergence of the global value chain analytical framework from the political economy of development (and underdevelopment) approach, value chain analysis has traditionally maintained a production orientation to...
This paper aims to analyse and elucidate key conditions for the sustainability of community-based fisheries management (CBFM) on unrestricted fisheries in Japan. It re-examines more than 50 years’ worth of empirical evidence regarding the outcomes of the socio-economic rationality of the self-imposed management of common property, with particular reference to...
ITQ systems generate ITQ prices. For any given ITQ-managed species there are typically two prices. One is for the annual (or seasonal) quota, the other is for the longer lasting ITQ-share. In well-functioning ITQ markets, these prices reveal important information about the fishery. In the single species framework, prices of...
It is commonly acknowledged that body weight of fish is a key factor in determining market value of landed catch, thus influencing optimal harvest strategies. However, in management strategy evaluations and bioeconomic modelling, body size is often an overlooked economic parameter, and there are no systematic studies on the prevalence...
"Human choices affect nature and nature affects human choice". This research is investigated irrigation development on lagoon fisheries in Sri Lanka. Spatial variation of the lagoon system is derived from the land use maps. Information on biological changes of the lagoon and bio-economic conditions were obtained from the secondary data....
Pactamycin, a complex aminocyclitol compound produced by Streptomyces pactum, has significant antibiotic, antitumor, and antiplasmodial activity. However, this natural product has not been developed for clinical use due to its high cytotoxicity. Modulation of its biological properties by chemical synthesis has been difficult due to its complex chemical structure. Therefore,...
A better understanding of the distribution and spawning behavior of Crangon shrimp and their relationship with their predators, including the green sturgeon, Acipenser medirostris, is an important step toward the larger goal to understand food webs of the nearshore continental shelf of the northeastern Pacific. Here, I examined how the...
When a resource shifts from one player to another, e.g. due to climate change, the conservation incentive of the player losing the resource decreases while the conservation incentive increases for the player at the receiving end. We set up an analytical model to study how the structure of the game...
Pelagic fishers operate in a dynamic environment and are faced with a high level of uncertainty on a daily basis. To cope with this complexity, fishers often rely on sharing information with others in order to improve their decision making. Yet previous research has not explicitly investigated the effect of...
Since the mid-1960s fish production has become increasingly market-driven with actors downstream in the commodity chain increasingly determining the price of fish. Previously, it has been shown that fishers' incomes tend to be low in both developed and developing countries and that linking fisheries to global markets causes income inequalities....
This study evaluates existing market-based incentive mechanisms, such as Marine Stewardship Council (MSC) certification, Fishery Improvement Projects (FIPs), and International Seafood Sustainability Foundation (ISSF) associate membership, as innovative instruments for tuna fishers to improve sustainability of their fishing methods. There is little knowledge on ways these types of incentive mechanisms...
The lack of property rights in fisheries is a well-known source of undesirable outcomes in terms of sustainability and profitability for fisheries. Both Territorial User Fishing Rights (TURF) and Marine Protected Areas (MPA) have been proposed as a tool for managing coastal fisheries, recovering stocks and improving fishing yields; it...
We investigated whether the spill of radioactive materials from the Fukushima nuclear plant into the Pacific Ocean has had a negative impact on demand for cod and pollock in wholesale markets in Japan between January 2004 and July 2013. A Bai and Perron structural break test detected several break points...
This research develops a method for estimating discreet changes (shocks) to total factor productivity (TFP) using catch-per-unit-effort (CPUE) and biological stock assessment data. An estimator for identifying jumps in realized volatility is adapted to the identification and estimation productivity shocks. The estimator is tested through simulation and in an application...