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Book (series)A review on culture, production and use of spirulina as food for humans and feeds for domestic animals 2008
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No results found.Spirulina are multicellular and filamentous blue-green microalgae belonging to two separate genera Spirulina and Arthrospira and consists of about 15 species. Of these, Arthrospira platensis is the most common and widely available spirulina and most of the published research and public health decision refers to this specific species. It grows in water, can be harvested and processed easily and has significantly high macro- and micronutrient contents. In many countries of Africa, it is us ed as human food as an important source of protein and is collected from natural water, dried and eaten. It has gained considerable popularity in the human health food industry and in many countries of Asia it is used as protein supplement and as human health food. Spirulina has been used as a complementary dietary ingredient of feed for poultry and increasingly as a protein and vitamin supplement to aquafeeds. Spirulina appears to have considerable potential for development, especiall y as a small-scale crop for nutritional enhancement, livelihood development and environmental mitigation. FAO fisheries statistics (FishStat) hint at the growing importance of this product. Production in China was first recorded at 19 080 tonnes in 2003 and rose sharply to 41 570 tonnes in 2004, worth around US$7.6 millions and US$16.6 millions, respectively. However, there are no apparent figures for production in the rest of the world. This suggests that despite the widespread public ity about spirulina and its benefits, it has not yet received the serious consideration it deserves as a potentially key crop in coastal and alkaline areas where traditional agriculture struggles, especially under the increasing influence of salination and water shortages. There is therefore a role for both national governments – as well as intergovernmental organizations – to re-evaluate the potential of spirulina to fulfill both their own food security needs as well as a tool for their overseas development and emergency response efforts. International organization(s) working with spirulina should consider preparing a practical guide to small-scale spirulina production that could be used as a basis for extension and development methodologies. This small-scale production should be orientated towards: (i) providing nutritional supplements for widespread use in rural and urban communities where the staple diet is poor or inadequate; (ii) allowing diversification from tr aditional crops in cases where land or water resources are limited; (iii) an integrated solution for waste water treatment, small-scale aquaculture production and other livestock feed supplement; and (iv) as a shortand medium-term solution to emergency situations where a sustainable supply of high protein/high vitamin foodstuffs is required. A second need is a better monitoring of global spirulina production and product flows. The current FishStat entry which only includes China is o bviously inadequate and the reason why other countries are not included investigated. Furthermore, it would be beneficial if production was disaggregated into different scales of development, e.g. intensive, semi-intensive and extensive. This would allow a better understanding of the different participants involved and assist efforts to combine experience and knowledge for both the further development of spirulina production technologies and their replication in the field. A third need is to develop clear guidelines on food safety aspects of spirulina so that human health risks can be managed during production and processing. Finally, it would be useful to have some form of web-based resource that allows the compilation of scientifically robust information and statistics for public access. There are already a number of spirulina-related websites (e.g. www.spirulina.com, www.spirulinasource.com) – whilst useful resources, they lack the independent scientific credibilit y that is required. -
Book (series)A preliminary value chain analysis of shark fisheries in Madagascar 2014
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No results found.Madagascar’s extensive (~6,500 km) coastline comprises the most diverse and extensive shallow marine habitats in the Western Indian Ocean, supporting an estimated 123 shark and ray species. Sharks have featured in Madagascar’s fisheries for at least 100 years, with exports recorded as early as the 1920’s. Globally, shark fins are one of the most highly valued seafood items and represent a critical and significant source of cash for some of Madagascar’s isolated fishing communities. The global sh ark fin trade is estimated to be worth between US$400-500 million a year. Increases in the shark trade over the last two decades is closely linked to economic growth in China, where the market is concentrated, and the ripple effects of this increase in demand have been felt worldwide. Scientific estimates for the number of sharks killed annually can be up to 100 million individuals and sharks are on the whole overexploited. Today, thirty percent of all shark and ray species are now classified as ‘Threatened’ or ‘Near Threatened’ with extinction according to the IUCN Red List, although this number is likely to be higher given that the status of almost half (47%) of shark species cannot be scientifically assessed due to a lack of data. There is strong evidence that shark overexploitation occurs in Malagasy waters and that shark populations in the area are declining rapidly. Although reliable figures on Madagascar’s domestic shark fishery are sparse, anecdotal observations report declines in shark numbers within the last two decades. According to national studies based only on official export data, recorded shark fin exports stood at approximately 32 tonnes in 2010, a decrease from 65 tonnes in 1994. Lack of data on catches, particularly from artisanal fisheries, bycatch by licensed industrial vessels, and by illegal, unregulated and unreported (IUU) fishing by foreign industrial vessels, means these official export figures are likely to be gross underestimates of the actual pro duction. Madagascar’s shark fishery is comprised of three main fisheries according to Malagasy legislation: artisanal, traditional and industrial fisheries. Madagascar’s artisanal and traditional shark fisheries extend along the entire west coast, with the most important traditional fisheries along the southwest coast. Overfishing has led to fisher migration, spreading the fishery along the entire west coast and also much of the north. There is no established traditional shark fishery along the east coast due to adverse sea conditions, whilst the south is the least developed of all sites surveyed for this report. Throughout the country, surveyed fishers report catching shark for the purposes of income from selling fins (88%) and meat (77%), and as a source of food (31%), demonstrating the important link to the international shark fin trade. Shark fin exports reach the international market mostly through two principal buyers and exporters, namely the Sea Reine and Sin Hing, Chinese comp anies based in Antananarivo. The supply chain for shark fins is both complex and rather fluid with fishers selling either fresh (wet) or dried fins to collectors and fins graded in value according to size and quality. Some fishers bypass the local collectors and sell dried fins directly to main buyers in larger towns to obtain a better price, which can be a mark-up of 40% for high quality fins. The value of shark fins during the study period (2012) varies according to their condition (wet or dri ed), quality (four recognised grades) and their position in the supply chain. Robust data was collected for the first two levels of the supply chain but was lacking for the higher levels (main buyer to exporter). Guitarfish fins were on the whole, twice as valuable as shark fins and therefore both in demand and a fishing target. Since 2012 the average value of shark fins has dropped. Trade in shark meat is also well establishedin Madagascar, with meat sold into a supply chain that serves mainly local and national (provincial) markets but can also be exported to the Comoros. Shark meat does not fetch a high price compared to other fish or meats but can be an important supplementary source of income or nutrition in some cases. Generally fresh meat is sold and consumed locally whilst dried salted meat is bought by collectors and transported to inland urban markets in Madagascar. Some dried shark meat is also exported. ANGAP Association Nationale pour la Gestion des Aires Protégées ASH Aut orité Sanitaire Halieutique BAD Banque Africaine de Dévelopement CBD Convention on Biological Diversity CCPS Cellule de la Coordination de la Politique Sectorielle/MPRH CLB/VOI Communauté Locale de Base/Vondron’Olona Ifatony CITES Convention on International Trade in Endangered Species of Wild Fauna and Flora COI Commission de l’océan Indien COS Certificat d’Origine et de Salubrité CSP Centre de Surveillance des Pêches CMS Convention on Migratory Species DGRH Direction de la Gestion des Ressourc es Halieutiques/MPRH DPRH Direction de la Pêche et des Ressources Halieutiques/MPRH DRPR Direction Régionale de la Pêche et des Ressources Halieutiques FAO Food and Agricultural Organization of the United Nations RFMO Regional Fishery Management Organization GEF Global Environnement Facility GTZ Gesellschaft Für Technische Zusammenarbeit IPOA Sharks – International Plan of Action for the Conservation and Management of Sharks IOTC Indian Ocean Tuna Commission IUU Illegal, Unregulated and Unreport ed JICA Japan International Cooperation Agency, Agence Japonaise de Coopération Internationale MAEP Ministère de l’Agriculture, de l’Elevage et de la Pêche MGA Malgasy Ariary MNP Madagascar National Parks (previously ANGAP) MPRH Ministère de la Pêche et des Ressources Halieutiques NGO Non Governmental Organisations SWIOFP/OISO South West Indian Ocean Fisheries Project, Programme de l’Océan Indien Sud- Occidental UNGA United Nations General Assembly WIO Western Indian Ocean WWF World Wild Fund fo r Nature 6 A preliminary value chain analysis of shark fisheries in Madagascar 7 8 A preliminary value chain analysis of shark fisheries in Madagascar Foreign commercial fishing fleets have also been prevalent in Malagasy waters since at least the 1980’s and primarily target shark and larger pelagic fish, with significant shark bycatch for those fisheries not directly targeting sharks. Almost none of the sharks caught are landed in Madagascar. IUU fishing within Madagascar’s Exclusive Economic Zone (EEZ) is a well-established issue, with the shark fishery specifically targeted by both licensed and unlicenced vessels. Despite the significant pressures on Madagascar’s shark fishery and the enormous socio-ecological and economic value of the trade, the country has no coherent or functioning shark conservation strategy or legislation. The lack of a national strategy is largely due to deficiencies in data on fishing effort, catches, landings and discards in all commercial fisheries for sh ark. This is compounded by a paucity of information on shark ecology, fisheries status and the socioeconomic value of the trade throughout Madagascar. Furthermore, in isolated coastal areas with little infrastructure, the sale of high value dried shark fins has been one of the few ways local Malagasy fishermen can earn cash. In this context, the diverse and unconnected stakeholders have no basis or motivation to enact meaningful conservation measures, particularly when economic imperatives outwe igh any other consideration. In a country as poor as Madagascar, even minor poverty relief is important, leading fishers to continue shark fishing despite low catches and diminishing returns for fishing effort, further threatening the future of the fishery. There is an urgent need to actively and aggressively manage Madagascar’s shark fishery. The rapid decline of sharks is likely to have several negative socioeconomic and ecological impacts, including the loss of livelihoods and protein for tho se people who rely on them and potentially altering the trophic structure of marine and coastal ecosystems. However, putting in place conservation measures and enforcing regulations remains a formidable challenge. Much of Madagascar’s fishery takes place in remote fishing grounds scattered over thousands of kilometres of coastline; the fishers are highly mobile and move great distances to seek productive fishing grounds; the government lacks the means to monitor these fisheries and enforce regul ations; and the markets are informal and closed. Significant steps must be taken in order to effectively prevent the collapse of Madagascar’s shark fishery. A widespread campaign to regulate both international and local shark fishing must occur simultaneously for any significant positive change to occur. For this to take place scientifically robust data must be collected over the long term. For any national conservation strategies to be implemented effectively, they should be based on data colle cted through participative monitoring and implemented at the national level. Such strategies should apply to artisanal and traditional fisheries, as well as to international commercial fishing vessels operating within the EEZ. Madagascar’s existing locally-managed marine areas are a vehicle through which coastal shark management strategies could be implemented. However an increase in both technical and logistical capacity will be required for effective management at the local, regional and natio nal level, together with strong enforcement support to LMMAs. Although it is recommended that the government develops appropriate national legislation and put in place proper monitoring and export restrictions, the onus remains heavily on the international community, with global legislation driving the regulation or lack of regulation of the global shark trade. Particular attention needs to be paid to those countries with distant water fleets / vessels operating within Madagascar’s EEZ, both leg ally and illegally. Without proper regulation of their shark fishing effort, partly through RFMO’s, little progress can be made. -
Book (series)Feed ingredients and fertilizers for aquatic animals: sources and composition 2009
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No results found.The present technical paper presents an up-to-date overview of the major feed ingredient sources and feed additives commonly used within industrially compounded aquafeeds, including feed ingredient sources commonly used within farm-made aquafeeds, and major fertilizers and manures used in aquaculture for live food production. Information is provided concerning the proximate and essential amino acid composition of common feed ingredient sources, as well as recommended quality criteria and relativ e nutritional merits and limitations, together with a bibliography of published feeding studies for major feed ingredient sources by cultured species. The main body of the document deals with the nutritional composition and usage of major feed ingredient sources in compound aquafeeds, as well as the use of fertilizers and manures in aquaculture operations. Major feed ingredient and fertilizer groupings discussed include: animal protein sources, plant protein sources, single cell protein sources, lipid sources, other plant ingredients, feed additives, and fertilizers and manures. The concluding section of the document undertakes a comparative analysis of the essential amino acid profiles of the major reported feed ingredient sources for cultured finfish and crustaceans, and presents average reported dietary inclusion levels of major feed ingredient sources used within practical feeds, including their major attributes and limitations. Finally, the importance of feed safety, traceability, and use of good feed manufacturing practices is stressed, together with the importance of considering the long term sustainability of feed ingredient supplies.
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