نتایج جستجو برای: food stocks
تعداد نتایج: 285524 فیلتر نتایج به سال:
Tropical rivers and their associated floodplain habitats are dynamic habitat mosaics to which fishes are challenged to respond in an adaptive manner. Migratory fishes create linkages among food webs that are partitioned along a nested hierarchy of spatial scales. Such linkages are examined across a hierarchy of spatio-temporal scales, ranging from small streams to entire drainage basins, for ri...
Over the past decade, a series of events in India have brought the question of food security into sharp focus. Vast famine-affected areas versus surplus production and stocks of grains, the impact of globalization and World Trade Organization laws on agriculture and farmers, the media’s spotlight on starvation deaths and, finally, the Supreme Court of India’s strong reaction to the plight of th...
Black Sea is one of themost severely degraded and exploited largemarine ecosystems in the world. For the last 50 years after the depletion of large predatory fish stocks, anchovy (with the partial contribution of sprat) has been acting as the main top predator species and experienced a major stock collapse at the end of 1990s. After the collapse, eastern part of the southern Black Sea became th...
The objective of this article was to develop a deeper understanding of the interdependences between smallholder farming and the state of environmental management in rural Malawi. We examined the agricultural local governance framework in Malingunde Extension Planning Area (EPA), its contribution to food security and how it conflicts with overall land and forest resources management. The charcoa...
A comprehensive seafloor biomass and abundance database has been constructed from 24 oceanographic institutions worldwide within the Census of Marine Life (CoML) field projects. The machine-learning algorithm, Random Forests, was employed to model and predict seafloor standing stocks from surface primary production, water-column integrated and export particulate organic matter (POM), seafloor r...
Insect resistance to toxins exerts not only a great impact on our economy, but also on the ecology of many species. Resistance to one toxin is often associated with cross-resistance to other, sometimes unrelated, chemicals. In this study, we investigated mushroom toxin resistance in the fruit fly Drosophila melanogaster (Meigen). This fruit fly species does not feed on mushrooms in nature and m...
Considering the concept of clustering, the main idea of the present study is based on the fact that all stocks for choosing and ranking will not be necessarily in one cluster. Taking the mentioned point into account, this study aims at offering a new methodology for making decisions concerning the formation of a portfolio of stocks in the stock market. To meet this end, Multiple-Criteria Decisi...
Introduction 2 History of the stock status plots 2 Challenges, improvements and using SSPs 6 Simulations that appear to invalidate SSPs 6 Two real issues: developing and rebuilding stocks 7 Using SSPs: Acceleration of shifts in global stock status 8 Expected SSP performance under various scenarios 10 Open access and regulated fisheries 11 Marine protected areas 13 Increased cost of fishing 13 F...
BACKGROUND Health recommendations advocating increased fish consumption need to be placed in the context of the potential collapse of global marine capture fisheries. METHODS Literature overview. RESULTS In economically developed countries, official healthy eating advice is to eat more fish, particularly that rich in omega-3 oils. In many less economically developed countries, fish is a key...
Management of fisheries in the Mediterranean basin has often been described as a unique and complex challenge, due to their multi-specificity, the diversity of gear-types, and the number of nations involved. This perspective has gone hand-in-hand for decades with a lack of strong political will from decision-makers, who have been unwilling to put Mediterranean fisheries management high on their...
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