Ocean temperatures are expected to rise over the next decades. This is likely to affect the distribution of fish stocks between the exclusive economic zones (EEZs) of different countries. Such changes are likely to be triggered as temperatures rise beyond certain threshold levels, and they are likely to be irregular,...
Since 1950, the real value of fish catches in Norway has about doubled, while the number of fishermen has declined by about 85 percent. This has made it possible to maintain fishermen's incomes roughly on par with other occupational groups in Norway. It is investigated to what extent this increase...
In a non-cooperative fishing game of two players, one single player must be sufficiently dominant in order to have an incentive to conserve the stock. Maximum growth rate of fish stocks could often be too low in order to provide a conservation incentive for a dominant player. The fish catch...
This paper discusses public expenditures on fisheries in Norway. The purpose is to identify management and enforcement costs, management being defined as regulations necessary to overcome the open access problem. Management costs thus include costs of devising and enforcing fisheries regulations. They also include stock assessments and monitoring at sea,...
Weitzman (2002) has shown that with a stochastic growth function and uncertainty in estimating stock size, landing fees will be superior to quotas as a means of controlling fish harvest. Hannesson and Kennedy (2003) expand the analysis by considering variable availability of fish, random fish prices, and non-constant returns to...
In the 1950s the Pacific sardine collapsed, and the fishery declined from a
historical peak of over 600,000 metric tons in 1936 to less than 100,000
tons after 1951 and was virtually nonexistent for 25 years (1965-90).
Despite this, the landings of sardine predators increased after the sardine
collapse and...
Present resource rents in Norway's fisheries were compared for different fleet structures. Alternative values of TACs were assumed, which is consistent with how most fisheries in Norwegian waters are managed. Total allowable catches (TACs) are set on the basis of advice by fisheries biologists where the economics of the industry...
The herring stocks in the Northeast Atlantic were nearly fished to
extinction in the 1970s. This collapse is usually attributed to advances in
fishing technology. The impact of productivity shocks depends critically on
how sensitive the fish catch is to the size of the stock. If the catch per unit...
The relative efficiency of landing fees versus quota controls to achieve given escapement levels is examined. The criterion is profit per year over a given time horizon. The model employed is a discrete version of the logistic model where growth is influenced by a random variable. Simulations are used to...
The potential for achieving sustainable and efficient harvesting of three species of migratory tuna in the
Western and Central Pacific Ocean is examined. The stocks reside in exclusive economic zones (mainly those of Pacific island countries) and in the high seas. Most harvesting is carried out by distant water fishing...