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...
The International Plan of Action for the Management of Fishing Capacity (IPOA-Capacity) was introduced in 1999 in response to growing concerns about excessive levels of fishing capacity and its impact on global fisheries resources. While debate in academic circles has focused on appropriate ways in which to measure capacity, the...
In the UK, individual quotas are imposed on the demersal whitefish trawl fleet. Many of the key whitefish stocks are at historically low levels, and there is pressure on the industry to adjust to remove the current excess capacity. Adjustment in the fishery is likely to favour vessels that are...
Days at sea restrictions were introduced in 2003 as part of the cod recovery strategy in the North Sea. The impact on the profitability of the fleet of the effort controls, however, is not immediately discernable, as the fishery was also subject to changes in costs, prices and stock conditions....
The world’s output of farmed fish has grown steadily over the past two decades or so. Most
notably in the UK, since the mid 1980’s, a rapid increase in farmed salmon production has taken
place. Given that many of the world’s oceans are overfished, many see aquaculture as a method...
Economic performance of different fleet segments varies considerably from year to year, with some segments experiencing increased profitability while others experience decreased profitability. This variation is generally considered to be a consequence of the stochasticity in the industry. However, there is growing evidence that fisheries may not be as stochastic...
The Abalone Fishery in one of Victoria’s most valuable commercial fisheries and most of the catch is exported to international markets in Asia (Japan, Hong Kong, Singapore, China). Target species consist of blacklip abalone and greenly abalone (<1% of total catch). The fishery is quota managed, and the total allowable...
Technical efficiency (TE) measures the relationship between a vessel’s inputs to the fishing process and its outputs, with full efficiency being achieved when outputs are maximised from a given set of inputs. Inputs can be physical (e.g. the vessel, gear, engine, onboard equipment, etc.), flexible (time spent fishing, size of...
Spatial bio-economic models are becoming increasingly important in the attempt to offer ever more dependable advice to fisheries managers. The main reason for this is the escalating interest in marine protected areas and more precisely fishing exclusion zones. As such the key issue of fishing effort dynamics needs to be...
Fishers are faced with multiple risks, including unpredictability of future catch rates, prices and costs. While the latter are largely beyond the control of fisheries managers, effective fisheries management should reduce uncertainty about future catches while also enhancing profitability. Different management instruments are likely to have different impacts on the...
Recently, there has been an increasing interest among researchers on efficiency in fisheries. They have not just been focused on the analysis of the efficiency itself but also for other purposes as measures of capacity utilisation. However, often, efficiency analyses do not offer clear results regarding the sources of the...
Despite the growing popularity of culture-based fisheries (CBFs) associated with village irrigation systems (VISs) in Sri Lanka, there is little knowledge about factors that influence productivity levels. To redress this, primary data from 325 fish farming groups in two districts (Kurunegala and Anuradhapura) are used to estimate a stochastic translog...
A recent analysis of the potential for management cost recovery in the UK suggested that such a policy would be detrimental to UK fishers if other European countries did not implement a similar charging policy. Most of the waters exploited by UK fishers are also exploited by fishers from other...
This study investigates the economic impact to fisheries and associated sectors if wild fisheries continue operating to
2030 without considering the effects of climate change. Estimates of climate change impacts in Australian fisheries
and their associated probability distributions were derived from the literature and expert consultations. An Input-
Output model...
The Australian federal fisheries policy identifies maximising net economic returns as the primary objective of fisheries management. This has largely been interpreted as maximising the net economic yield (MEY) in fisheries. For multispecies fisheries, this has been based on maximising the net present value of total profit in the fishery...
Differences in technical efficiency of fishing vessels are often attributed to skipper skill and differences in technology. While the later can be defined in terms of the technology employed, the former is more difficult to quantify. In this paper, the contribution of technology and skipper characteristics (e.g. level of education,...
Australian Commonwealth fisheries have adopted maximum economic yield as a target reference point. A bioeconomic model has been developed for one key fishery - the Northern Prawn Fishery - and is used in the provision of management advice. The development and application of this model has highlighted some challenges for...
The FAO International Plan of Action on the management of fishing capacity calls for all member states to provide estimates of the total capacity of their fleets by 2001. In the UK, a “capacity” measurement system is currently in place, based on vessel size and engine power. An assumption is...
The concept of compensatory mitigation is well established as an approach to environmental management. In the past, mitigation programs have been used to conserve wetlands affected by development, and is proposed as a cost-effective approach to offsetting greenhouse gas emissions through reforestation programs. The concept may be equally applicable to...
A concern for the consequences of bycatch and discards in fisheries has led to the implementation of
new policies and fisheries management plans aimed at their reduction in many fisheries around the
world. Such plans have been developed for the Australian Commonwealth fisheries (the most recent
bycatch action plan extends...
Fisheries management is characterised by multiple objectives. However, seldomly do bioeconomic models incorporate more than one or possibly two key objectives, typically profit and employment, into an analysis. There are both practical and technical reasons for this. This study considers the incorporation of eight key objectives into a bioeconomic analysis...
The introduction of culture-based fisheries (CBF) in small scale irrigation systems is increasing the marginal value of water in rice farming. The amount of water that is used in Sri Lanka for rice farming could be utilised to generate more profitable non-crop economic activities such as CBF. This paper examines...
Full Text:
, University of Kelaniya, kule_econ@kln.ac.lk
Sean Pascoe, CSIRO Marine and Atmospheric Research
Closed areas are often used as either temporary or permanent measures to reduce fishing pressure on stocks. A major concern, however, is what happens to the effort that was previously employed in these areas. When modelling the potential impacts of the closed areas, it is necessary to model changes in...
Capacity reduction programs in the form of buybacks or decommissioning programs have had relatively widespread application in fisheries in the US, Europe and Australia. A common criticism of such programs is that they remove the least efficient vessels first, resulting in an increase in average efficiency of the remaining fleet....
Main objective of this paper is to analysis in what extent culture-based fisheries (CBF) facilitates increase rural income to reduce the poverty gap among the agricultural farming communities associated with village reservoirs in Sri Lanka The present study deals with the economic analysis CBF in 23 successfully harvested village reservoirs...
A higher dependence on the resources motivates to community participation on resources management. Uses of common property resources are not benefit to each and every person in equal rate of resources since magnitude of the resources extraction depend on the number of criterion. Selecting of the interest group for the...
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...
Main objective of this paper is to investigate current issues of the development of Culture-Based Fisheries (CBF) within the existing legal frame work. The experiences of CBF activities from 2003-2004 in five administrative districts in Sri Lanka have identified two main issues for the development of culture- based fisheries such...
With the development of the ecosystem approach to f
isheries (EAF), fisheries management is
increasingly required to deal with multiple, often
conflicting objectives. In this context, the
stochastic co-viability approach has been proposed
as a useful modeling framework as it allows
for the combined representation of complex fisherie
s dynamics,...
Individual Transferable catch-Quotas (ITQs) have become a popular management tool to reduce excess competition and foster economic efficiency in marine commercial fisheries. They have increasingly been used in more complex multispecies fisheries, where the by-catch of non-targeted species is common. In these fisheries, the reduction of discards is also being...
Considerable attention has been applied to the development of models explaining how fish stocks change over space
and time, from relatively simple stock-recruitment relationships to ecosystem models with a complex food web
structure. However, in many case studies fishing effort is assumed to be exogenous and even in dynamic models...