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Book (series)Use of algae and aquatic macrophytes as feed in small-scale aquaculture - a review 2009
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No results found.This paper presents a global review on the use of aquatic macrophytes as feed for farmed fish, with particular reference to their current and potential use by small-scale farmers. The review is organized under four major divisions of aquatic macrophytes: algae, floating macrophytes, submerged macrophytes and emergent macrophytes. Under floating macrophytes, Azolla, duckweeds and water hyacinths are discussed separately; the remaining floating macrophytes are grouped together and are reviewed as ‘other floating macrophytes’. The review covers aspects concerned with the production and/or cultivation techniques and use of the macrophytes in their fresh and/or processed state as feed for farmed fish. Efficiency of feeding is evaluated by presenting data on growth, food conversion and digestibility of target fish species. Results of laboratory and field trials and on-farm utilization of macrophytes by farmed fish species are presented. The paper provides information on the different process ing methods employed (including composting and fermentation) and results obtained to date with different species throughout the world with particular reference to Asia. Finally, it gives information on the proximate and chemical composition of most commonly occurring macrophytes, their classification and their geographical distribution and environmental requirements. -
Book (series)Report of the FAO Expert Workshop on On-farm feeding and feed management in aquaculture. Manila, the Philippines, 13–15 September 2010. 2010
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No results found.The FAO Expert Workshop on “On-farm feeding and feed management in aquaculture” was convened in Manila, the Philippines, from 13–15 September 2010. The workshop was attended by a wide range of aquaculture researchers, development specialists and industrial experts from around the world. The workshop was convened by the FAO Fisheries and Aquaculture Department, Aquaculture Service (FIRA) and was hosted by the Southeast Asian Fisheries Development Center Aquaculture Department (SEAFDEC/AQD) based in Iloilo, the Philippines. The workshop was organized with three objectives: a) to review and analyze the existing knowledge on the application of feed management as a tool for reducing feed costs in aquaculture, b) to identify the major issues and constraints of feed management and those that need to be addressed and c) to prepare a list of recommendations to define/suggest the future course of action, including the preparation of technical manuals/guidelines for dissemination to farmers. The workshop convened both in plenary and in working groups. In the plenary, participants heard technical presentations intended to orient them to the issues and constraints pertaining to on-farm feeding and feed management. These presentations included invited reviews, case studies and synthesis of the case studies. Following several working group deliberations and a general plenary discussion, the participants identified seven primary issues that currently constrain feed use and management in aqua culture, namely: 1) limited access to information on feed and feed ingredients (availability, prices and quality); 2) poor feed preparation, processing, handling and storage at the farm level; 3) inadequate monitoring of feed and farm performances; 4) low impact of current dissemination strategies on improved feeding and feed management; 5) gaps in the understanding of the economic aspects of feed management; 6) health aspects and their implications on feed management; and 7) feed quality – lack of regulatory mechanisms. A comprehensive set of recommendations was developed to overcome the constraints that were identified, and it is anticipated that these recommendations will guide FIRA’s future work in this arena. The workshop proceedings and recommendations, invited reviews, case studies and syntheses will form the basis for an FAO Fisheries and Aquaculture Technical Paper entitled “On-farm feeding and feed management in aquaculture” which will be published in due course. -
No Thumbnail AvailableBook (stand-alone)Better utilization of crop residues and by-products in animal feeding: research guidelines - 1. State of knowledge, 1985
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No results found.A Technical Consultation on New Feed Resources was held at FAO Headquarters, Rome in 1976. This Consultation paid special attention to the potentialities of poor quality roughages derived from agriculture, the quantities available, and the improvementof the nutritive value of such roughages by the use of physical, chemical and biological methods. Attention was also given to agro-industrial by-products such as molasses, pulps, processed cassava and potato residues, oilcakes, milling by-produc ts, etc. along with the by-products of wood and the cellulose industries and to the recycling of animal wastes. In order to support studies on increasing the rate of utilization of crop residues and agro-industrial by-products in animal feeding in Africa, the Animal Production and Health Division of FAO, in collaboration with several research institutes in that region, such as those in Cameroon, Nigeria and Senegal, set up in 1973 a network or the subject of 'West Africa. This network was to assist the activities being undertaker. in connection with this subject in African countries and to promote the exchange of research experience and other related information between African countries. To support the African network on better feed utilization, FAO in 1981 in collaboration with the International Livestock Centre for Africa MCA) organized the FAO/ILCA Workshop on Crop Residues and Agro-Industrial By-products in Animal Feeding, at Dakar, Senegal. About 40 scientists from 15 different African countries attended this workshop. The Workshop made many recommendations and laid down guidelines for the future activities of the African network. It stressed the importance of appropriate support and encouragement being given to the scientists undertaking research work on the subject at various institutes in different countries of Africa. The Dakar 'Workshop of 1981 made a recommendation amongst others that an Expert Consultation should be organized in ord er to establish guidelines for research on crop residues and agro-industrial by-products and that this consultation should produce a booklet in which would be described the detailed methodology employed and which would contain a compilation of all the known appropriate methods of analysis. In 1983, the Animal Production and Health Division of FAO included this Expert Consultation in their regular programme budget for the period 1984-1985. As the subject features prominently in the pro gramme activities of ILCA the Director, Dr. Brumby, expressed interest in collaborating with FAO in organizing such an Expert Consultation at ILCA Headquarters in Addis Ababa, Ethiopia. In the autumn of 1983, the Animal Production and Health Division of FAO sent a consultant (Dr. Preston) to review the present situation on research being undertaken on the utilization of crop residues and agro-industrial by products in selected African countries, nanely Carneroon, Nigeria and Senegal, and to ascertain how ILCA experts could cooperate in such research work. Dr. Preston's findings will serve as a background paper for the Expert Consultation. FAO and ILCA invited. scientists from various countries of the world to participate in the Expert Consultation, the main objectives of which were: to outline and discuss the present situation in regard to the kind of research going on in developing countries at the present time and the research methodologies which might suitabl y be employed in such research; to make recommendations and set down guidelines for research on crop residues and agro-industrial by-products for the guidance of research workers in developing countries in order that useful results can be achieved from their work.
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