The Abalone Fishery is one of Victoria's most valuable commercial fisheries and almost all of the catch is exported to international markets, predominately in Asia. An outbreak of a virus called the Abalone Viral Ganglioneuritis (AVG) decimated one third of Australia’s abalone, starting in 2005. However, there has been little...
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...
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...
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...
Fisheries in Queensland, and elsewhere, are coming under increased pressure from other potential resource users for access to the resources. These include the fish resource itself (i.e. by recreational fishers), as well as encroachment on the area of the fishery through conservation based closures and onshore activities (e.g. port development)...
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...
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...
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...
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...
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...
Australia has a policy of achieving maximum economic yield (MEY) in Commonwealth fisheries, with many States also interested in the MEY target. Bioeconomic models are being developed for estimating MEY for several fisheries, supported by economic surveys of the fisheries. While most cost components can be derived directly from the...
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...
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,...
Climate change is expected to impact the productivity of wild and farmed fisheries worldwide. These impacts will vary by region and consequently affect differently the supply to markets. Market driven interactions between fisheries from different regions and between different target species means that changes in supply from one region or...
Sustainability and economic efficiency are well established and defined objectives in Australian fisheries management. Many Australian States and Territories include some reference to social considerations in their fisheries legislation, but this is poorly defined and has little direct influence on policy formulation. From the literature, many fisheries social objectives are...
With international efforts to develop ecosystem-based management of ocean uses, there has been a growing call for the development of integrated assessment tools, including the design of models which can be used to identify possible futures and evaluate alternative management strategies. Along with this, there is increasing recognition that such...
Establishing marine protected areas (MPAs) often results in fishers being
displaced from at least some of their existing grounds. A direct
consequence of this is that governments may be required to make
compensatory payments to the firms that are affected. Experience has
demonstrated that these payments can be significant, as...
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...
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...
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...
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....
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...