Consumer-facing traceability systems are emerging in the global seafood sector as a way for companies to reduce their reputational risk, access certain markets, and to generally communicate production practices to downstream actors. What are the characteristics of these systems, what benefits do they bring to different value chain actors, and...
To run the ITQ system as well as other components of the fisheries management system, the Icelandic government conducts a number of activities which may be regarded as fisheries management services. The most important of these are performed by (i) the Fisheries Directorate which maintains the quota registry and enforces...
Australian governments spend millions of dollars each year on pre-border, border and post-border biosecurity programs. The majority of these programs are resourced through existing deeds of agreement, but some currently fall outside of these funding frameworks. Frameworks not based on economic principles have the potential to deliver sub-optimal outcomes with...
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...
Various methods have been used to estimate the amount of above ground forest biomass across landscapes and to create biomass maps for specific stands or pixels across ownership or project areas. Without an accurate estimation method, land managers might end up with incorrect biomass estimate maps, which could lead them...
SUMMARY:
1. Understanding how predators select their prey can provide important insights into community structure and dynamics. However, the suite of prey species available to a predator is often spatially and temporally variable. As a result, species-specific selectivity data are of limited use for predicting novel predator–prey interactions because they...
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...
In 2007 the Fisheries Management Act passed through the South Australian parliament. The Act includes several new provisions which substantially changed the nature of commercial fishing rights, resource sharing between competing sectors and rights based management.
These interrelated provisions include: (1) Commercial licences are issued for the duration of a...
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...
The established of exclusive rights to fish is essential for tuna-Regional Fisheries Management Organizations to prevent overfishing, achieve sustainability, and to realize maximum economic benefits. Exclusive use or property rights may be based on catch, effort, or licenses, and similar systems can be used for bycatch. Unique issues arise compared...
Abalone, Haliotis asinina, is a high value shellfish for export trade that provide cash income to fishing households in some coastal communities in the Philippines. Stock enhancement is one of the fisheries management strategies that enable recovery of overfished stocks through release of juveniles and consequent stock increase through recruitment....
Indonesia is the biggest seaweed producer in the world. Seaweed (Eucheuma spp) has become a popular alternative livelihood activity in Indonesia as a way to diversify livelihood activities and thereby improve household livelihood outcomes with added incomes. It is relative easy form of aquaculture to implement at the producer level....
Lepidopteran nucleopolyhedroviruses are members of the Baculoviridae and have been categorized as having two morphotypes of occluded virions: multiple nucleocapsids or single nucleocapsids within the virion envelope. Although it is a definitive characteristic of specific viruses, it appears to lack a defined genetic basis and is independent of virus phylogeny....
Discard rates in marine fisheries have been estimated at more than 80% for some individual fisheries, with an average global discard rate of 8%. Discarding of catch can be problematic for three main reasons: (1) in the absence of accurate and precise discards estimates, unreliable catch data distort estimation 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...
If the spatial and temporal distribution of resources is not homogenous it creates an assignment problem. While the adoption of individual (or transferable) quota management in many commercial fisheries has resolved issues of over-appropriation, assignment problems may remain due to the spatial and temporal complexity of fisheries resources, which creates...
In this paper, we discuss the solution for the shortage of labor supply in the fishing industry by comparing three countries/region in the East Asia; Japan, Taiwan and Korea. Fishery is a so-called 3D (Dirty, Dangerous and Difficult) industry as it requires hard work on the ocean often through the...
Scanner data that’s collected on consumer purchases falls into two main groups: point-of-sale scanner data and household-based scanner data. Point-of-sale scanner data can identify the products that are purchased, the quantity sold, and the price of the product. Household scanner data comes from a sample of survey participants that scan...
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...
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...
Ideally, we seek to develop perfectly integrated ecological-economic models, drawing on the best data, modeling and knowledge of each of the disciplines, into one coherent model to inform policy. The realities of achieving such are thwarted by data and model compatibility issues. For example, ecological data may be available on...
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...
Conventional bioeconomic analyses focus on the economically optimal exploitation of the fish resources by maximizing the resource rent subject to a resource restriction. This paper expands this type of analysis by addressing the fishing activity's impact on the ecosystem biologically as well as economically. A dynamic bioeconomic model is used...
"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....
Coastal and marine spatial planning (CMSP) is a process for improving the management of ocean resources in order to promote their sustainable development. One of the most challenging spatial planning issues in New England now concerns the siting of offshore renewable energy facilities, mainly wind farms. Commercial fishermen are among...
Ghana's coast is identified with artisanal fishers who use wooden carved canoes and traditional fishing gears. However, little study has been conducted to assess the performance of this industry in terms of its efficiency. This study aims to analyse the technical efficiency and its determinants of the artisanal fishers in...
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...
Focus groups were combined with surveys to inform policy making regarding precautionary measures to protect cold water coral (CWC). CWC represent complex environmental public goods involving irreversibility and uncertainty. Respondents believe CWC is valuable and should be protected. Use-values, particularly habitat for fish, dominated the focus group discussions, whereas non-use...
Crown jellyfish (Periphylla periphylla) has become an increasing biological and economic problem for the fishermen in many Norwegian fjords. It is known to prey on a variety of planktonic species including small crustaceans like krill and calanus as well as fish eggs and larvae. Thus, this jellyfish is both a...
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...
Remote regions in developing countries have often not shared in the increase in income and quality of life associated with economic growth in the industrial and service sectors. This is particularly true in countries with a rapidly developing economy and middle class, such as Brazil. Remote regions remained trapped in...
In 2009 a network of 19 multiple-use Marine Parks was created in State waters under the South Australian Marine Parks Act 2007. Section 21 of the Act contains compensation provisions where rights of fishing licence holders are affected by the creation of marine parks. Management plans and zoning regulations were established...
The paper puts forward a Bayesian Network model to study the optimal eutrophication control in coastal waters by reducing nutrient loads and removing fish biomass (bottom-up and top-down ecosystem mechanisms). The model combines an aquatic ecosystem model with an economic model and examines the economic and ecological consequences of nutrient...
Maritime spatial planning and fishery management are likely to generate extra costs for the fisheries by constraining fishermen activity with conservation areas and new utilizations of the sea such as offshore windmill parks. Growing concerns for greener and energy efficient fisheries are also likely to alter existing fishing patterns already...
Sea lice (lepeophtheirus salmonis) are a type of ectoparasite that hosts on Atlantic salmon (Salmo salar), weakening the fish and slowing its growth rate. In addition to the direct loses associated with reduced fish growth, sea lice also cause significant economic losses to salmon industries in Norway due to the...
Growing industrial and consumer demands are negatively affecting fish stocks, which are extracted above sustainable levels. Successful conservation of marine resources through restricted-use zoning systems such as marine reserves and territorial user rights schemes relies on support from marine stakeholders – particularly coastal fishing communities. Restricted use zoning will result...
This study evaluated the potential impact of global fish trade on local food prices and potential food security and associated adaptation by analyzing a locally-collected time series of disaggregated coral reef fish prices by types of fish that differed in their market chain linkages- ranging from local to international markets....
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...
The Orinoco Sailfin Catfish (OSC) is an invasive fish species introduced into local water bodies through the ornamental fish industry in Sri Lanka. Freshwater aquaculture is a key element that strengthens the rural economy while fulfilling nutritional needs of rural populations. At present, growth of OSC is adversely affecting the...
More than 1.2 million people worldwide require regular hemodialysis therapy to treat end stage renal failure. Current hemodialysis systems are too expensive to support at-home hemodialysis where more frequent and longer duration treatment can lead to better patient outcomes. The key cost driver for hemodialysers is the cost of the...
Coastal foredunes protect lives, infrastructure, and ecosystems during severe storms. A range of approaches, ranging from simple (e.g., geometric) to complex (e.g., process-based) predictive models, have been developed to quantify overtopping and foredune retreat during storms. At present, however, there is no widely accepted approach for assessing the vulnerability of...
This special issue presents short-term ecological effects of restoration treatments imposed as part of the Sagebrush Steppe Treatment Evaluation Project (SageSTEP), and summarizes
public attitude survey results related to restoration efforts.
Funded by the US Joint Fire Science Program (JFSP; 2005-2011), the Bureau of Land Management (BLM; 2011 to present),...
As part of the Sagebrush Steppe Treatment Evaluation Project (SageSTEP), butterflies were surveyed pre-treatment and up to four years post-treatment at 16 widely distributed sagebrush steppe sites in the interior West. Butterfly populations and communities were analyzed in response to treatments (prescribed fire, mechanical, herbicide) designed to restore sagebrush steppe...
Polyandry is a source of sexual conflict and males often try to limit female promiscuity. Consequently, male manipulation of receptivity via antiaphrodisiacs and copulatory plugs that prevent female remating can be a source of sexual conflict. This sexual conflict may be intensified when females must remate for fertility insurance. Male...
A Fishery Gross Margin (FGM) model has been used, as a cost-effective and practical alternative to more complex economic modelling, to inform the development of structured TACC decision rules as part of the formal harvest strategy adopted for the South Australian Pipi (donax Deltiodes) fishery since 2012.
The primary economic...
This paper is a compilation of several themes that addresses how Te Arawa iwi Trusts are utilising kaitiakitanga; traditional methods, practices and customs to manage freshwater environments and freshwater fisheries. Te Arawa is a central north island indigenous tribe of Aotearoa/New Zealand. Several deeds of settlement have been signed with...
In 1986, New Zealand implemented the world’s first comprehensive individual transferable quota management system for fisheries, designed to ensure sustainable use of fish resources by restricting take levels. Today, fewer people are fishing less frequently, often using with more efficient capture technologies. Drawing on ethnographic research with Maori fishing communities...
Despite the efforts of natural resource economists to implement rights-based fishery management systems, many of the world’s fisheries remain over-exploited and lack an institution to change course. Given the status quo of overharvesting and depleted fish stocks, it seems natural for a harvester co-op to jointly curtail fishing mortality, which...
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...
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...