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Book (series)Technical studyProduction of triploid Pacific oyster (Crassostrea gigas) spat
A practical manual
2024Also available in:
No results found.Naturally spawned oysters are typically diploid, each cell containing two sets of chromosomes. Diploid oysters exhibit seasonal variability in condition because they spawn during the summer months following a period of ripening as sea temperatures warm. Often this coincides with the peak period for selling oysters in many countries. Triploid oysters contain three sets of chromosomes and because they are for the most part sterile, they can maintain suitable market quality throughout the year and have organoleptic qualities that are preferred by many consumers. Growth of triploids is generally much faster than diploids grown under the same conditions. For these reasons, many hatcheries produce triploid oysters. Triploid oysters can be readily produced in hatcheries using either direct induction techniques or by first producing tetraploid oysters and then using sperm from male tetraploids to fertilise eggs from diploid females. There are several different direct techniques to induce triploidy, including physical treatments such as pressure, temperature or salinity shock or chemical treatments using either cytochalasin B or 6-Dimethyl aminopurine (6-DMAP). -
Book (stand-alone)Manual / guideGuide de bonnes pratiques conchylicoles 2024
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No results found.Ce guide de bonnes pratiques conchylicoles est conçu pour promouvoir des pratiques durables et responsables dans l’élevage et la production de mollusques bivalves, tels que les moules, les huîtres et les palourdes. Il vise à assurer la protection de l’environnement, la santé des bivalves et la sécurité alimentaire des consommateurs tout en favorisant une industrie des mollusques viable et durable.Cette publication est nécessaire pour prévenir les impacts environnementaux. La conchyliculture peut nuire aux écosystèmes côtiers, y compris la dégradation de l’habitat et la transmission de maladies aux populations sauvages. Le guide encourage les agriculteurs à adopter des méthodes respectueuses de l’environnement. -
Book (series)Manual / guideThe living marine resources of the Western Central Pacific. Volume 1. Seaweeds, corals, bivalves and gastropods 1998
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No results found.This multivolume field guide covers the species of interest to fisheries of the major marine resource groups exploited in the Western Central Pacific. The area of coverage includes FAO Fishing Area 71 and the southwestern portion of Fishing Area 77 corresponding to the South Pacific Commission mandate area. The marine resource groups included are seaweeds, corals, bivalves, gastropods, cephalopods, stomatopods, shrimps, lobsters, crabs, holothurians, sharks, batoid fishes, chimaeras, bony fishes , estuarine crocodiles, sea turtles, sea snakes, and marine mammals.
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Book (series)FlagshipThe State of Food Security and Nutrition in the World 2022
Repurposing food and agricultural policies to make healthy diets more affordable
2022This year’s report should dispel any lingering doubts that the world is moving backwards in its efforts to end hunger, food insecurity and malnutrition in all its forms. We are now only eight years away from 2030, but the distance to reach many of the SDG 2 targets is growing wider each year. There are indeed efforts to make progress towards SDG 2, yet they are proving insufficient in the face of a more challenging and uncertain context. The intensification of the major drivers behind recent food insecurity and malnutrition trends (i.e. conflict, climate extremes and economic shocks) combined with the high cost of nutritious foods and growing inequalities will continue to challenge food security and nutrition. This will be the case until agrifood systems are transformed, become more resilient and are delivering lower cost nutritious foods and affordable healthy diets for all, sustainably and inclusively. -
Book (series)FlagshipThe State of Food Security and Nutrition in the World 2023
Urbanization, agrifood systems transformation and healthy diets across the rural–urban continuum
2023This report provides an update on global progress towards the targets of ending hunger (SDG Target 2.1) and all forms of malnutrition (SDG Target 2.2) and estimates on the number of people who are unable to afford a healthy diet. Since its 2017 edition, this report has repeatedly highlighted that the intensification and interaction of conflict, climate extremes and economic slowdowns and downturns, combined with highly unaffordable nutritious foods and growing inequality, are pushing us off track to meet the SDG 2 targets. However, other important megatrends must also be factored into the analysis to fully understand the challenges and opportunities for meeting the SDG 2 targets. One such megatrend, and the focus of this year’s report, is urbanization. New evidence shows that food purchases in some countries are no longer high only among urban households but also among rural households. Consumption of highly processed foods is also increasing in peri-urban and rural areas of some countries. These changes are affecting people’s food security and nutrition in ways that differ depending on where they live across the rural–urban continuum. This timely and relevant theme is aligned with the United Nations General Assembly-endorsed New Urban Agenda, and the report provides recommendations on the policies, investments and actions needed to address the challenges of agrifood systems transformation under urbanization and to enable opportunities for ensuring access to affordable healthy diets for everyone. -
Book (stand-alone)Technical bookClimate change and food security: risks and responses 2015
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End hunger, achieve food security and improve nutrition are at the heart of the sustainable development goals. The World has committed to eradicate extreme poverty and hunger by 2030. But climate change is undermining the livelihoods and food security of the rural poor, who constitute almost 80 percent of the world’s poor. The effects of climate change on our ecosystems are already severe and widespread. Climate change brings a cascade of impacts from agroecosystems to livelihoods. Climate change impacts directly agroecosystems, which in turn has a potential impact on agricultural production, which drives economic and social impacts, which impact livelihoods. In other words, impacts translate from climate to the environment, to the productive sphere, to economic and social dimensions. Therefore, ensuring food security in the face of climate change is among the most daunting challenges facing humankind. Action is urgently needed now to reduce vulnerability and increase resilience of food systems to ensure food security and good nutrition for all.