La lagune de Nador se caractérise par un écosystème semi-fermé, en communication avec la mer par une étroite passe. Cet écosystème est sous l'influence de plusieurs facteurs externes tels que l'ensoleillement, l'apport en eau douce, les eaux de ruissellement, le lessivage des champs agricoles et les eaux usées urbaines. L'influence...
Le projet «système d’information géographique pour les pêcheries en Afrique de l’Ouest » a pour objectif de promouvoir l’utilisation des systèmes d’information géographique comme outil d’aide à la décision en matière d’aménagement des pêcheries. Un rappel préliminaire des critères caractérisant un produit d’aide à la décision (accessibilité technique, disponibilité en...
The last three years RIVO-DLO and LEI-DLO have developed a bio-economic simulation model for the Dutch beam trawl fishery. At the VII th IIFET conference in Taipei (1994, Taiwan) some preliminary results were presented and at the 4th EAFE bio-economic modeling workshop in Edinburgh (1995, United Kingdom) the final model...
Marine reserves have increasingly been recognised for their potential to address the pervasive problem of unsustainable harvest of fisheries worldwide. Abalone catch around Stewart Island has been in decline since the turn of the century despite being managed under NZ's quota system. A nested logit model is applied to spatially...
Great efforts have been made in order to manage the fisheries more sustainably, but so far, most of these efforts have failed. This is putting the welfare of current and future generations at risk. The fishing fleets have catching capacity that well exceeds the rate at which ecosystems can produce...
Many futures contracts for food commodities have been introduced; however, most of them have been withdrawn from the market due to poor liquidity. In this paper, various known success factors for futures contracts with regards to a proposed futures contract for salmon are discussed. Based on the various criteria from...
Under the reauthorized Magnuson-Stevens Act (MSRA), US fisheries management councils must specify an annual catch limit (ACL) for each managed species and institute accountability measures (AMs) to ensure that actual harvest will not cause the stock to be overfished. While the details of implementation are still being developed, a set...
A principle U.S. fisheries management concern is ensuring compliance with Endangered Species Act requirements to limit incidental takes of listed species to levels which do not result in potential jeopardy to existing population stocks. Part of the risk assessment process involves an analysis of historic takes (bycatch) of ESA-listed species...
In agriculture there has been a long history of using a levy or an insurance premium to create mutual funds to mediate economic risks to growers due to environmental variability and quarantine pests. In the United States the federal government, through the USDA, continues to underwrite funds (collected by private...