Debate over the consequences of marine reserve implementation has long focused on tradeoffs between ecological improvements from reserves and possible economic losses from reduced harvest. More recently, several articles suggest instead that reserves might generate economic as well as ecological benefits (1; 2; 3; 4). In particular Hastings and Botsford demonstrate that, even without any ecolog...

A comprehensive understanding of the reproductive biology and spawning activity of the tuna is necessary for sound management of this complex and important fishery. Current methods for assessing maturity schedules of tunas is based on the conventional approach of collecting gonads for detailed histological examination. While this method has proven to be accurate and provides valuable informatio...

Many fisheries in North America are in crisis, creating ever more complex problems for managers. Management decisions are contested in court, changed via legislation, or merely ignored. As complexities multiply, accuracy of management predictions decrease. Managers need tools to examine complex fishery systems which include not only biological and economic concerns, but political, social and be...

Managing most marine finfisheries to achieve optimum yields is an unattainable dream. Protecting these resources from serious depletion through precautionary management seems the only practical option. But even this is of limited application if we demand scientific data for each managed fishery. There are too few researchers to do the work and, in any event, such research would usually not be c...

In the past decade tens of millions of dollars have been spent by water resource agencies in California to restore the native salmon fishery in the San Joaquin River and its major tributaries. An excavated deep water ship channel (DWSC), through which the river runs on its way to the Bay/Delta and Pacific Ocean, experiences episodes of low dissolved oxygen which acts as a barrier to anadromous ...

Socio economic and biophysical heterogeneity has an important impact on collective conformity to resource management measures. Within the kapenta fishery of lake kariba, there are several types of heterogeneity. These include differences in appropriation skills, political influence, initial endowment and local resource endowments. Kapenta operators have somewhat different preferences regarding ...

Decision-makers charged with implementing ecosystem-based management (EBM) rely on scientists to predict the consequences of decisions relating to multiple, potentially conflicting, objectives. Such predictions are inherently uncertain, and this can be a barrier to decision-making. The Convention on the Conservation of Antarctic Marine Living Resources requires managers of Southern Ocean fisher...

A decision support concept (DSC) for sustainable management of the bottom trawl fleet was created in line with ecosystem-based management. It is based on principles that integrate ecological, social and techno-economic aspects of trawl fisheries in a multicriteria analysis approach. For the sake of greater transparency and improved stakeholder participation, elements of the proposed multicriter...

The bigfin squid Sepioteuthis lessoniana, a commercially important fishery resource and also an object of sightseeing for diving, are under risk situation arising from current management procedure in Taiwan. Significant decline in abundance of bigfin squid and destruction of suitable substrates for spawning of neritic squids in coastal waters of Northeast Taiwan has been noted by local fisherme...

Greenhouse Gas (GHG) emissions from the offshore fisheries industry in the Republic of Korea (Korea) were examined in response to growing concerns about global warming and the contribution of emissions from different industrial sectors. Fuel usage and GHG emissions (CO2, CH4, N2O) were analysed using the 'Tier 1' method provided by the Intergovernmental Panel on Climate Change (IPCC) from the o...