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Book (series)Technical studyInterregional workshop on the management of shared stocks and implementation of the ecosystem approach to fisheries within the framework of the EAF-Nansen Programme, Dakar, Senegal 24–26 April 2018 / Atelier interrégional sur la gestion des stocks partagés et la mise en oeuvre de l'approche écosystémique des pêches dans le cadre du Programme EAF-Nansen, Dakar, Sénégal 24-26 avril 2018 2020
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No results found.An interregional workshop on the management of shared stocks and implementation of an ecosystem approach to fisheries within the framework of the EAF-Nansen Programme was held in Dakar, Senegal from 24 to 26 April 2018. The objective of the workshop was to examine with the representatives of partner institutions and principal initiatives the current situation and related activities pertaining to shared stocks by identifying the needs and opportunities to support the management of fisheries exploiting shared stocks within the framework of the EAF-Nansen Programme. Un atelier interrégional sur la gestion des stocks partagés et la mise en œuvre de l'approche écosystémique des pêches dans le cadre du Programme EAF-Nansen s’est tenu à Dakar, Sénégal du 24 au 26 avril 2018. Les objectifs de l’atelier étaient d’examiner avec les représentants des institutions et principales initiatives partenaires la situation actuelle et les activités connexes relatives aux stocks partagés en identifiant les besoins et d’identifier les opportunités d’appui à la gestion des pêcheries qui exploitent les stocks partagés dans le cadre du Programme EAF-Nansen. -
ProjectProgramme / project reportLectures notes. AdriaMed Training Course on Fish Population Dynamics and Stock Assessment. - AdriaMed Technical Documents 8
Split, 10-29 September 2001
2001Also available in:
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MeetingMeeting documentExploratory stock assessment of the striped marlin (Tetrapturus audax) caught in the Indian Ocean as calculated using a state-space biomass dynamic model 2013
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No results found.Although white marlin is not a target large commercial longline tu boats, it is often a bycacth. There is little information on stock structure but it is assumed that the one unique stock in the Indic Ocean is the most probable hypothesis. The available data is limited to catch and catch rates. Usually the quality of the data concerning bycatch species is not high, hence it is difficult to achieve success running stock assessment models. In this paper a potentially useful Bayesian version of sta te-space biomass dymic models (Fox and Schaefer types) are used in an attempt to assess the status of the white marlin stock of the Indic Ocean. Results are compared to conventiol versions in which only the observatiol error is considered. Calculations were based on estimations of total catch and on standardized catch rates as estimated based on Japan database. In this and in his companion paper (IOTC2013- WPB11-25) the likelihood function was based on log-normal density distributions. Monte Car lo Markov Chains are used to calculate the posterior sample. Three chains starting with different parameters estimations were calculated. The first 50000 samples of each chain were discarded (burnin), and the next 50000 samples were sliced resulting in a fil sample with size equal to 1000. Convergence of the chains was assessed using Gelman-Rubin diagnostics. Most of state-space models have converged, but not the observatiol error models. The exception among the observatiol error models was the Fox type as calculated with a non- informative prior. The state-space models are not biased, but the observatiol error are. The striped marlin database is not very informative, hence the uncertainties on the estimations were very high. The state-space model estimations were also very sensitive to choices about priors. More investigation is needed on the behavior of state-space models when the data is not that informative.
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Book (series)FlagshipThe State of Food Security and Nutrition in the World 2021
Transforming food systems for food security, improved nutrition and affordable healthy diets for all
2021In recent years, several major drivers have put the world off track to ending world hunger and malnutrition in all its forms by 2030. The challenges have grown with the COVID-19 pandemic and related containment measures. This report presents the first global assessment of food insecurity and malnutrition for 2020 and offers some indication of what hunger might look like by 2030 in a scenario further complicated by the enduring effects of the COVID-19 pandemic. It also includes new estimates of the cost and affordability of healthy diets, which provide an important link between the food security and nutrition indicators and the analysis of their trends. Altogether, the report highlights the need for a deeper reflection on how to better address the global food security and nutrition situation.To understand how hunger and malnutrition have reached these critical levels, this report draws on the analyses of the past four editions, which have produced a vast, evidence-based body of knowledge of the major drivers behind the recent changes in food security and nutrition. These drivers, which are increasing in frequency and intensity, include conflicts, climate variability and extremes, and economic slowdowns and downturns – all exacerbated by the underlying causes of poverty and very high and persistent levels of inequality. In addition, millions of people around the world suffer from food insecurity and different forms of malnutrition because they cannot afford the cost of healthy diets. From a synthesized understanding of this knowledge, updates and additional analyses are generated to create a holistic view of the combined effects of these drivers, both on each other and on food systems, and how they negatively affect food security and nutrition around the world.In turn, the evidence informs an in-depth look at how to move from silo solutions to integrated food systems solutions. In this regard, the report proposes transformative pathways that specifically address the challenges posed by the major drivers, also highlighting the types of policy and investment portfolios required to transform food systems for food security, improved nutrition, and affordable healthy diets for all. The report observes that, while the pandemic has caused major setbacks, there is much to be learned from the vulnerabilities and inequalities it has laid bare. If taken to heart, these new insights and wisdom can help get the world back on track towards the goal of ending hunger, food insecurity, and malnutrition in all its forms. -
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 bookFood loss analysis: causes and solutions – The Republic of Uganda. Beans, maize, and sunflower studies 2019
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No results found.This report illustrates the food loss assessment studies undertaken along the maize, sunflower and beans supply chains in Uganda in 2015-16 and 2016-17. They aimed to identify the critical loss points in the selected supply chains, the key stages at which food losses occur, why they occur, the extent and impact of food losses and the economic, social and environmental implications of the food losses. Furthermore, these studies also evaluated the feasibility of potential interventions to reduce food losses and waste.