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Book (series)Better data collection in shark fisheries – Learning from practice 2021
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No results found.Some species and stocks of sharks, rays, skates, and chimaeras (termed shark in this review) are rapidly depleting due to climate change, land-based influences, and overfishing. These pressures, coupled with sharks’ low reproductive potential (slow growth and delayed maturation; long reproductive cycles; low fecundity; and long lifespans) place sharks in a risk profile that is more akin to mammals on land than fish in the ocean. The development of policy, and the delivery of management and conservation measures regulating the use, international trade, and capture of sharks (whether as a targeted species or as bycatch in fisheries), is hindered by gaps in basic knowledge – a knowledge that is required in order to get a clear sense of their status in real-time. Many countries are establishing or strengthening monitoring across shark value chains to overcome these shortfalls in information. This document reviews what shark fisheries data is being collected, highlighting the opportunities and constraints in collecting information on sharks in fisheries, based on practical experience. It includes information from 28 surveys across 19 countries: 9 in the Mediterranean, 5 in Africa, 3 in Asia, and 1 in Oceania. Interviews were conducted with data collectors and managers across the entirety of the survey process, while data collection variables were documented in order to inform those interested in the collection, provision, and exchange of shark information on common practices and their commonalities. The review identifies standardized information metrics which, if collected more generally, would strengthen the opportunity for harmonized reporting and cross-comparability across surveys. In addition – and in order to assess the status quo – the current data collection requirements of management measures applied to sharks by regional fisheries management organizations (RFMOs) were reviewed, including “no retention” measures. Finally, the review proposes a list of the minimum standard measurements and common life-history parameters required to support the assessment of shark stocks in fisheries. -
Book (stand-alone)Good practices in sample-based area estimation 2024
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No results found.Reducing Emissions from Deforestation and Forest Degradation, and the role of conservation, sustainable management of forests and enhancement of forest carbon stocks in developing countries (REDD+), as well as greenhouse gas reporting for the agriculture, forestry and other land use sector, requires land use changes to be characterized to estimate the associated greenhouse gas emissions or absorptions. It is becoming increasingly common to generate these estimates using sample-based area estimation (SBAE). This technique has been widely used in recent years in the generation of activity data – particularly for estimating areas of deforestation – for REDD+ measuring, reporting and verification. However, implementing countries and agencies have repeatedly highlighted the lack of guidance on how to address certain frequently encountered issues with this approach. This paper seeks to enable donors, academia, and countries that currently use or want to use SBAE for generating activity data for REDD+ or for other national or international reporting purposes, to delve into current good practice and existing literature, as well as gain a better understanding of the most pressing research needs in the area. The paper moreover will give non-experts an overview of area estimation, as well as its applications and limitations.Published by FAO with the collaborative support of several partners in the Global Forest Observations Initiative (GFOI), the World Bank and the Department for Energy Security and Net Zero of the United Kingdom of Great Britain and Northern Ireland, the paper is expected to contribute to improved forest data. -
Book (stand-alone)Building awareness in aspects of fishery statistics, stock assessment and management. proceedings of the FAO/SEAFDEC regional training workshop on the use of statistics and other information for stock assessment. 2002
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No results found.An account of the FAO/SEAFDEC workshop, this document includes a brief account of the fishery statistics programme undertaken by the FAO Fishery Information, Data and Statistics Unit. Catch statistics from the FAO database are provided for each country along with comments relevant to the quality of the statistics. Fish stock assessment initiatives in the region are briefly reviewed. This is followed by an introduction to spreadsheet applications of the Thompson and Bell’s approach to assessing f ishery performance and on the use of trophic models as applied in the aquatic ecosystem off the southwest of India. Issues concerning fishery management are also discussed. These include a brief review on marine fisheries management in the region, and suggested approaches to achieving better linkages between research and management. The latter include formalizing the linkages through legally empowered fisheries management plans, and fishing community / industry / government co-financing of fishe ries research and management.
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