The paper reviews existing allocation mechanisms in the five tuna regional fisheries management organizations and shows that although they have adopted different approaches all have failed to prevent overcapacity and, for some stocks, overexploitation. As an alternative, it is proposed that each tuna regional fishing management organization establish total allowable catches by species and area,...

The use of stylized dynamical systems models and bifurcation analysis in modeling individual and collective behavior in two traditional societies, the Tsembaga of New Guinea and the Polynesians of Easter Island, is explored. The analysis is used to isolate key aspects of individual behavior that open up the possibility of resource overexploitation and key aspects of institutions capable of prev...

The international market for luxury goods puts pressure on many wildlife species, with potentially irreversible consequences for many of them. Although classical economic theory suggests that trade alone would not drive a rare species to extinction, in practice numerous species are being threatened by overexploitation. This is for example the case for sturgeons, exploited for their caviar, of w...

The Barents Sea (BS) is a high-latitude shelf ecosystem with important fisheries, high and historically variable harvesting pressure, ongoing variability in climatic conditions. To quantify carbon flow pathways assess if changes intensity climate have affected the BS ecosystem, we modeled for period 1950–2013 using highly trophically resolved mass-balanced food web model (Ecopath Ecosim). Ecosi...

Based on the characteristics of fishing sector (multispecies and multi-gears) stock status main resources (overfishing overexploitation), some suggestions to improve sustainability demersal small pelagic fisheries in Mediterranean are proposed. In exploiting single or few species, such as pelagics deep-water red shrimps, adoption a management system based catch quota approaches is suggested. ca...

The fisheries crisis of the last decades and the overexploitation of a great number of stocks have revealed that the scientific knowledge available about the dynamics of the marine ecosystems and needed for the management of the fisheries is inadequate. This problem is critical when the management of coastal ecosystems and artisanal fisheries is involved. These systems show a great complexity d...

The status of the Mediterranean and Black Sea fisheries was evaluated for the period 1970-2010 on a subarea basis, using various indicators including the temporal variability of total landings, the number of recorded stocks, the mean trophic level of the catch, the fishing-in-balance index and the catch-based method of stock classification. All indicators confirmed that the fisheries resources ...