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DocumentOther documentGuias alimentarias del Paraguay
Dietary guidelines of Paraguay
2013Also available in:
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Book (stand-alone)Technical studyDeep-ocean climate change impacts on habitat, fish and fisheries
FAO Fisheries and Aquaculture Technical Paper No. 638
2019Also available in:
No results found.This publication presents the outcome of a meeting between the FAO/UNEP ABNJ Deep-seas and Biodiversity project and the Deep Ocean Stewardship Initiative. It focuses on the impacts of climatic changes on demersal fisheries, and the interactions of these fisheries with other species and vulnerable marine ecosystems. Regional fisheries management organizations rely on scientific information to develop advice to managers. In recent decades, climate change has been a focus largely as a unidirectional forcing over decadal timescales. However, changes can occur abruptly when critical thresholds are crossed. Moreover, distribution changes are expected as populations shift from existing to new areas. Hence, there is a need for new monitoring programmes to help scientists understand how these changes affect productivity and biodiversity. The principal cause of climate change is rising greenhouse gases and other compounds in the atmosphere that trap heat causing global warming, leading to deoxygenation and acidification in the oceans. Three-dimensional fully coupled earth system models are used to predict the extent of these changes in the deep oceans at 200–2500 m depth. Trends in changes are identified in many variables, including temperature, pH, oxygen and supply of particulate organic carbon (POC). Regional differences are identified, indicating the complexity of the predictions. The response of various fish and invertebrate species to these changes in the physical environment are analysed using hazard and suitability modelling. Predictions are made to changes in distributions of commercial species, though in practice the processes governing population abundance are poorly understood in the deep-sea environment, and predicted -
Book (series)Working paperFarms, family farms, farmland distribution and farm labour: What do we know today? 2019
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No results found.A better and more complete understanding of family farms is urgently needed to guide policy makers’ efforts towards achieving a number of Sustainable Development Goals (SDGs). This paper takes stock of the number of farms worldwide, and their distribution and that of farmland, on the basis of agricultural censuses and survey data. Thus, it shows that there are more than 608 million farms in the world. Rough estimates also indicate that more than 90 percent of these farms are family farms (by our definition) occupying around 70–80 percent of farmland and producing about 80 percent of the world’s food in value terms. We underscore the importance of not referring to family farms and small farms (i.e., those of less than 2 hectares) interchangeably: the latter account for 84 percent of all farms worldwide, but operate only around 12 percent of all agricultural land, and produce roughly 36 percent of the world’s food. The largest 1 percent of farms in the world operate more than 70 percent of the world’s farmland. The stark differences between family farms, in terms of size, their share in farmland distribution, and their patterns across income groups and regions, make clear the importance of properly defining different types of farms and distinguishing their differences when engaging in policy discourse and decision making towards the SDGs. The paper also considers evidence on labour and age provided by the censuses. There is a need to improve agricultural censuses if we want to deepen our understanding of farms.