Fishmeal is a critically important feed ingredient for use in animal (e.g., poultry and pork) and
aquaculture production (e.g., salmon, trout, and shrimp). There is concern that demand for fishmeal may
place additional stress on the world’s pelagic fisheries and may undermine the sustainability of some
aquaculture systems that rely...
Key decision variables in aquaculture management are stocking level, feeding schedule, temperature
control and batch length. In many management problems with an infinite planning horizon, the aim is to
find the batch length which results in maximum return if the same batch length applies to all future
batches. This may...
Shrimp farming in Iran is one of the fast growing segments of the economy. In 1994, around 1%
of Iranian shrimp production was farmed and by 2003 the share of shrimp farming increased to
60%. In spite of the fact that shrimp culture had relatively rapid growth in last decade,...
The optimal harvesting time in a fish farm is analyzed in the paper. Fish population is assumed to be heterogeneous with respect to weight, so a distributed parameter dynamic model is considered. Theoretical and numerical results are obtained and compared with the ones concerning homogeneous fish cultures only. The results...
The sinking of the oil tanker the Prestige in November 2002 off the coast of Galicia in Spain had an
important social, environmental and economic impact. The aim of this paper is to carry out an initial
analysis of the costs relating to a halt in the activity of an...
This study addresses the matter of logistic improvement of live food fish trade by economic analyses of pertinent information provided by the live fish traders in 2004 on three species of live fish: sand goby, sea bass, and grouper. The analyses take into consideration the logistics cost, break-even point, market...
The harvesting strategies in open access marine fishery and marketing patterns of marine products have
undergone rapid structural changes in the post liberalisation era of the Indian Economy. There is a
continuous increase in demand and price of the fish both in domestic and export markets and the thrust on...
Wholesale demand systems for live reef food fish in Hong Kong are analysed using the Linear Approximate Almost Ideal Demand System (LA/AIDS). Results suggest that price elasticities of demand are inelastic, with relatively high-valued species exhibiting greater elasticity than relatively low-valued species. Cross price elasticities are negative suggesting that different...
Economists have generated numerous studies analyzing how a move to rights-based fishery management from open-access management affects fish harvesters' behavior. Conversely, the impacts that such a change in management can have on fish processors has received relatively little attention. This paper presents a simple two-product processor supply model to show...
In 1976 global exports for fish and fisheries products was approximately $8 billion. In 2000,
global exports exceeded $55 billion. The period between 1985 and 1995 witnessed the tripling
of global fisheries exports. This represents more than half of total value of global fisheries
production. Developing countries began to increase...
A bio-economic model, based on Faustmann rotation, was developed to analyze the relevance of
removing thinning activities which are part of the dominant technology used in blue mussel production in
Canada. Removing these density control activities (thinning) seemed a profitable option to producers. It
was thought that this collector line...
The success or failure of aquaculture heavily depends on how effectively to manage aquatic animal
diseases. In order to analyze the economic effects of aquatic animal disease control, the specific factors
and magnitudes of benefits and costs are identified with and without the proposed project for the disease
control. These...
In natural resource economics, we sometimes observe a situation in which producers and consumers have
direct access to the factors of production or can use some consumable products with little or no
transformation. These goods are commonly referred to as “gifts of nature”. A factor of production is
considered a...
The exploitation of aquatic food products has been very fundamental as a source of livelihood in
the Sub Saharan Africa in particular and the world in general. Global production of aquatic food
products totaled approximately 93.2 million metric tons in 1997 and sub Saharan Africa
contributed 3.7 per cent. For...
The advent of scientific shrimp farming in India during 1990-91 was a turning point of shrimp production
in the country. Though scientific shrimp farming system renders higher level of production than the
existing traditional farming system, it is subject to certain criticisms especially for generating negative
environmental externalities. The conversion...
This paper sets out an evaluation of profitability differentials within shellfish farming activities of the
Mont-Saint-Michel Bay. The objective is to examine whether profitability differentials have
consequences in terms of economic dynamics and of management arrangements. The paper divides into
four parts. The first part presents a retrospective analysis of...
Assuming externalities from aquaculture to fisheries, we use a Verhulst-Schaefer model of fish
population-dynamics and production, coupled with an aquaculture production model, to investigate
effects on open-access and rent-maximising fisheries. Externalities are modelled by letting carrying
capacity, intrinsic growth rate or catchability coefficient in the fishery depend on aquaculture production....
The geoduck fishery in British Columbia has been managed by individual quotas since 1989. Individual
quotas have fostered a co-operative management approach in the fishery, which is implemented through a
non-profit society with membership made up of licence holders in the fishery. This non-profit society, the
Underwater Harvesters Association (UHA),...
The security of world fish supply from wild fisheries and from aquaculture is an increasing concern due to dwindling yields from wild catch and undesirable ecological impacts of aquaculture. The extent to which aquaculture can substitute for fish from wild catch will depend on the productivity of aquaculture, which in...
The structure of wholesale and retail marketing catfish (Clarias gariepinus) were analysed in order to assess the degree of competition and understand the organization of the farm raised catfish (Clarias gariepinus) market in southwestern Nigeria, a major aquaculture fish producing area in Nigeria. The market was evaluated by considering the...