Related items
Showing items related by metadata.
-
Book (series)Rebuilding of marine fisheries - Part 2: Case studies 2018
Also available in:
No results found.Part 2 of the global review of “Rebuilding of Marine Fisheries” provides 13 case studies of fisheries on which rebuilding initiatives were undertaken, in various parts of the world and under different circumstances, as well as an analysis of the role of closures (MPAs and fishery closures) in rebuilding. The cases studies relate to: Northeast Atlantic and Mediterranean Bluefin tuna; Norwegian spring spawning herring and Northeast Atlantic cod; Southeast Australia multispecies (scalefish and sharks); Japanese sardine, anchovy and chub mackerel; Western Australia snapper, multispecies demersal resources and scallop fisheries; South African fisheries on hakes, sardine and rock lobster; and Canadian (Newfoundland) cod. The MPA analysis considers many examples of MPAs and fishery closures, including the Great Barrier Reef. The case studies illustrate contrasting situations regarding the nature of the resources, the types of fisheries, the governance structures and processes, the environmental and socioeconomic contexts, the causes of depletion, information richness, and outcomes. They highlight the multiple dimensions of the rebuilding problem. A number of lessons are learned regarding the triggering factors, the likelihood and factors of success in rebuilding, the importance of reactiveness, timeliness and clarity of the objectives, the weakly predictable nature of the process, the main problems, the uncertainty inherent in rebuilding trajectories, the needed improvements in the legal, policy, governance and management frameworks, the rebuilding and post-rebuilding regimes, economic and social considerations, science - policy issues, environmental issues, enabling and limiting factors and challenges. -
Book (stand-alone)Global review of orange roughy (Hoplostethus atlanticus), their fisheries, biology and management 2018
Also available in:
No results found.This publication is intended to provide a range of stakeholders and interested parties with an understanding of orange roughy fisheries around the world. The report covers historical aspects of the regional development of orange roughy fisheries, biology, stock assessment, ecosystem interactions, and key management issues. Recent developments in science and approaches to management are specifically highlighted with respect to future management of sustainable deepwater orange roughy fisheries. The sustainability of orange roughy fisheries, or other fisheries for long-lived deepwater species, has been widely discussed. These reviews invariably draw on the common global experience of previous poor understanding about orange roughy productivity, rapid development of targeted industrial fisheries, the associated likelihood of overfishing and extended timescales for stock recovery, and an ensuing series of “boom and bust” orange roughy fisheries that frequently resulted in depleted stocks. The more recent experience, with greater knowledge, improved technology, better approaches to modelling population dynamics in orange roughy, and a more considered and robust approach to setting up the management framework (harvest strategy, management strategy evaluation, appropriately estimated limit and target reference points or ranges, and effective harvest control rules), provides a different paradigm. Essentially, many of the assumptions about the unmanageability of these fisheries are not supported by the more recent evidence. Provided appropriate steps are taken to set and deliver a low and appropriate level of fishing mortality, orange roughy fisheries can be both well managed and sustainable. The improved understanding of the productivity and population response of orange roughy now provides a basis for better estimating yields and fishery value that are both more realistic and compatible with sustainable fisheries. It is also of note that the regional fisheries management organizations that have the largest stocks and fisheries for orange roughy – the Southern Indian Ocean Fisheries Agreement and the South Pacific Regional Fisheries Management Organisation – have been ramping up their efforts to manage the fishing for the target species and at the same time address the benthic and vulnerable marine ecosystem impacts of bottom fishing through developing science-based, spatial management. While there is still considerable discussion and opposed viewpoints on the sustainability of deepwater fisheries generally, aspects of the message have clearly changed: sustainable orange roughy fisheries are achievable. This review describes how, by making the right choices and employing the best science available, there are now some demonstrably sustainable orange roughy fisheries. Even with this rather more positive perspective of the sustainability of these deepwater orange roughy fisheries, there remain some considerable challenges to address. These include improving understanding of deepwater benthic communities in general, their genetics and population distributions, their dispersal, and their ability to recover from fisheries (and other) impacts. With regard to the direct management of the fisheries, there are important opportunities and needs to improve ageing and acoustic biomass estimation, and to better understand the genetics and population structure of the stocks of orange roughy that are fished and managed. -
Book (series)Report of the FAO/RECOFI Workshop on Fishery Stock Indicators and Stock Status. Tehran, the Islamic Republic of Iran, 26-29 July 2009. 2011
Also available in:
No results found.This document contains the report of the FAO/RECOFI Regional Workshop on Fishery Stock Indicators and Stock Status that was held in Tehran, Islamic Republic of Iran, from 26 to 29 July 2009. At the fourth session (2007) of RECOFI held in Jeddah, Kingdom of Saudi Arabia, the Secretariat prepared for the minimum requirements of stock assessment. The Commission recognized that those requirements were too complicated and noted a shortage of expertise. The effort was resumed at the second m eeting of the Working Group on Fisheries Management (WGFM) in 2008 where a shift to a pragmatic approach based on an Ecosystem Approach to Fisheries management (EAF) with adaptive procedures was recommended. The objective of the Workshop was to review the availability of data on the biology of the identified priority resources, catch and effort statistics for the relevant fisheries, other socio-economic statistics, results of stock assessments and other relevant research activities i n member countries; to identify the major gaps in knowledge and information, priority areas for regional cooperation and potential joint activities; and to formulate the RECOFI work program for regional cooperation in assessment of stocks and fishery status appraisal in the short and medium term. Employing a simple matrix of Susceptibility Productivity Analysis (PSA), the participants identified three areas of particular concern. These are the ecosystem-wide impact of shrimp trawls, th e exploitation of neritic demersal assemblages as well as sharks as indicators of the overall level impact of exploitation, and, thirdly, the stock status of a selected priority species, Scomberomorus commerson, for which historic data are available. The Workshop concluded with a set of recommendations to the WGFM that focused on improvement of data collection and monitoring capacity and members¿ contributions to scientific knowledge through joint activities.
Users also downloaded
Showing related downloaded files
No results found.