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Book (series)Global fishery resources of tuna and tuna-like species. 2007
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This paper reviews the state of fishery resources of tuna and tuna-like species on a global scale, focusing on those most important commercially, i.e. the so-called principal market tuna species. These are classified as tropical tunas (skipjack, yellowfin and bigeye) and temperate tunas (albacore and bluefin [Atlantic, Pacific and southern]). For each tuna and tuna-like species, the document provides: taxonomic and other basic biological information; the development and expansion of the fishery; catch trends; institutional frameworks for regional cooperation in fisheries research, particularly stock assessment; procedures and input information for stock assessment; the status of the stocks; potential improvements in knowledge of the status of the stocks; and the future outlook for this status and catches. -
Book (stand-alone)Eco-certification for the tuna industry: technical assistance for implementation of a Regional Fisheries Strategy for ESA-IO (IRFS) 2011
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No results found.This report presents the findings of a mission that examined the requirements for developing and establishing an eco-certification scheme that is specific to a group of tuna vessel operators and fish processors working in the western Indian Ocean region. “Eco-certification” is assurance that fishery products are from fisheries that have functional harvest rules that protect the target fish resource as well as the environment. Obtaining eco-certification will be challenging as currently there are few effective harvest rules – and to establish such a system requires consensus among the many countries that participate in tuna fishing in the Indian Ocean. This report discusses the lack of harvest rules and other obstacles to eco-certification. Options are presented for progressing the situation, and a long- term plan for eco-certification is proposed. -
Book (series)Estimation of tuna fishing capacity from stock assessment related information.
Workshop to Further Develop, Test and Apply a Method for the Estimation of Tuna Fishing Capacity from Stock Assessment-related Information. La Jolla, California, United States of America, 14–16 May 2007.
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No results found.These Proceedings include (i) the Report of and (ii) the paper presented at the Workshop to Further Develop, Test and Apply a Method for the Estimation of Tuna Fishing Capacity from Stock Assessment-Related Information. The Workshop was hosted by the Inter-American Tropical Tuna Commission (IATTC) in La Jolla, California, USA, from 14 to16 May 2007. It was organized by FAO’s Japan-funded Project on the “Management of Tuna Fishing Capacity: Conservation and Socio-Economics” in collaboration with and with in-kind support of several international and national fisheries institutions involved tuna fisheries research and management. The paper presented at the Workshop describes peak-to-peak (PP) and general additive modeling (GAM) approaches to estimate fishing capacity and related quantities from stock assessment information. The PP and GAM methods were applied to seven stocks of bigeye, yellowfin and skipjack tuna of the Pacific, Indian and Atlantic Oceans. The estimated trends in overca pacity with both methods were consistent across most of the stocks, showing increasing trends at the beginning of the time series and reaching maximum values during the late 1990s, followed by decreasing trends after that. For most of the stocks analyzed, overcapacity was positive during a part of the time series. Sensitivity tests revealed greater estimates of capacity output when the stock assessment data were most disaggregated. Further tests revealed that the estimates of overcapacity were l ower when low variability in effort deviations was permitted in the stock assessment. The Report of the Workshop outlines the discussions carried out at the Workshop, some proposals for further research, recommendations and conclusions of the Workshops.
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