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No Thumbnail AvailableBook (series)Manual of Fisheries Science Part 2 - Methods of Resource Investigation and their Application 1974This document was produced in a provisional version solely for use as background documentation at the FAO/DANIDA Training Centre in the Methodology of Fisheries Science held in Frederikshavn, Denmark from 28 August to 22 September 1972. On the basis of the experience gained in using it as training material it has been revised and edited with a view to circulating it for comment by international workers in this field. This revised version will be used at the second FAO/ DANIDA Training Centre in the Methodology of Fisheries Science (Biology) to be held in Kelibia, Tunisia, from 29 July to 23 August 1974. Comments and criticisms are welcomed and should be addressed to the Aquatic Resources Survey and Evaluation Service, Fishery Resources and Environment Division, FAO, Rome. Hyperlinks to non-FAO Internet sites do not imply any official endorsement of or responsibility for the opinions, ideas, data or products presented at these locati ons, or guarantee the validity of the information provided. The sole purpose of links to non-FAO sites is to indicate further information available on related topics.
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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 (stand-alone)Report of the Expert Workshop on Means and Methods for Reducing Marine Mammal Mortality in Fishing and Aquaculture Operations, Rome, Italy, 20-23 March 2018 2018
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No results found.One of the greatest threats to species and population survival of marine mammals with their relatively slow growth and low fecundity comes from inadvertent interaction with, or capture in, fishing and aquaculture operations. FAO members have expressed great concern about bycatch of marine mammals at recent sessions of the Committee on Fisheries (COFI). At its Thirty-First Session in 2014 the Committee reiterated its support for FAO’s ongoing work on bycatch management and reduction of discards, and requested FAO to expand its efforts to effectively implement the International Guidelines on Bycatch Management and Reduction of Discards, addressing all fishing gears where bycatch, including, inter alia, that of marine mammals, and discards were a problem. At its Thirty-Second Session in 2016, the committee welcomed the offer of the United States of America to fund an expert workshop to review the findings of recent international marine mammal bycatch workshops. Within this context, FAO convened the Expert Workshop on Means and Methods for Reducing Marine Mammal Mortality in Fishing and Aquaculture Operations in Rome, Italy from 20 to 23 March 2018, which was attended by twenty-seven experts in marine mammal science and bycatch mitigation. The workshop reviewed the current state of knowledge on the issue of marine mammal bycatch, and evaluated the efficacy of different strategies and measures for mitigating bycatch and their implementation. The workshop produced some key technical outputs, including an extensive review of techniques across different gear types and species, together with a summary table and a draft decision-making tool (decision tree) which could be used to support management decision-making processes. The workshop recommended that FAO develop Technical Guidelines on means and methods for prevention and reduction of marine mammal bycatch and mortality in fishing and aquaculture operations in support of FAO’s Code of Conduct for Responsible Fisheries and as a supplement to International Guidelines on Bycatch Management and Reduction of Discards. The workshop also recommended that FAO consider establishing a global capacity development programme to support developing States in the application of the proposed guidelines.
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