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Technical Reports

ISSF produces a number of technical reports, including the Status of the World Fisheries for Tuna. Other technical reports can be contributed by individual scientists or correspond to meetings hosted by ISSF.

Title Technical Number Author Description
Status of the World Fisheries for Tuna: 2009 ISSF This document provides an update and analysis of the commercially fished tuna stocks that ISSF assesses.
Status of the World Fisheries for Tuna: 2010 ISSF This document provides an update and analysis of the 4 commercially fished tuna stocks that ISSF assesses.
Replacing Purse Seining With Pole-And-Line Fishing In The Western Pacific (Bait Fish) Robert Gillett The purpose of this short study is to estimate the quantities of baitfish that would be required to replace purse seining in the Pacific Islands region and to examine the ability of the region’s baitfish resources to support that replacement.
Stock Assessment 101: Current Practice for Tuna Stocks 2011-01 Victor Restrepo This document reviews the main types of data and models used in tuna assessments today.
Report of the 2011 ISSF Stock Assessment Workshop 2011-02 ISSF In 2011, ISSF hosted a workshop to examine several issues that can significantly affect scientific management advice and which are not always being treated consistently in tuna stock assessments.
Questions and Answers About FADs and Bycatch 2011-03 Laurent Dagorn and Victor Restrepo The authors summarize the information currently available on FAD-based fisheries, with a focus on bycatch.
Status of the World Fisheries for Tuna: Stock Status Ratings, 2011 2011-04 ISSF The report describes the status of the 19 stocks of the four main species of tunas – yellowfin (YFT), bigeye (BET), skipjack (SKJ), and albacore (ALB).
Status of the World Fisheries for Tuna: Stock Status Ratings, 2011 2011-04A ISSF An update that incorporates conservation and management measures adopted by IATTC in July 2011.
Status of the World Fisheries for Tuna: Stock Status Ratings, 2011 2011-04B ISSF An update that incorporates conservation and management measures adopted by the WCPFC & ICCAT.
Status of the World Fisheries for Tuna: Stock Status Ratings, 2011 2011-04C ISSF This version has been updated to take into account the updated stock assessments conducted by IOTC in December 2011 and the management actions adopted by ICCAT in November 2011.
Status of the world fisheries for tuna: Management of tuna stocks and fisheries, 2011 2011-05 ISSF This document summarizes the management frameworks that are in place for tuna stocks and fisheries, with emphasis on RFMOs.
Managing Fishing Capacity in International Fisheries 2011-06 Maria C. Engler-Palma This paper reviews and summarizes the approaches and practices of five tuna regional fisheries management organizations (RFMOs) in managing fishing capacity.
Computing a Global Rate of non-Target Species Catch (Bycatch) 2011-07 Victor Restrepo This paper provides regional and global estimates of the catch of non-target species, relative to the catch of target tunas, in tropical tuna purse seine fisheries.
The Promotion of Pole-and-Line Tuna Fishing in the Pacific Islands: Emerging Issues and Lessons Learned 2011-08 Robert Gillett This report examines the various issues associated with promoting pole-and-line fishing and attempts to derive lessons from experience that may guide future development efforts.
Transshipment in Tuna-RFMOs and Mechanisms to Support Best Practices in Tuna Fisheries 2011-09 Sarah A. McTee This paper outlines the details and implications of transshipment-related measures currently in force, and highlights areas in which the monitoring and regulation of transshipment operations could be improved.
A Snapshot of the Tropical Tuna Purse Seine Large-Scale Fishing Fleets At the End of 2011 2012-01 Victor R. Restrepo and Francesca Forrestal While this document does not provide any suggestions for how to limit, reduce or transfer capacity, it does provide some baseline data by addressing some fundamental questions: Who are the developed fishing members? What are their current capacities? How do they compare to the capacities of developing fishing members? What is the definition of large-scale purse seiners?
A review of the conservation benefits of marine protected areas for pelagic species associated with fisheries 2012-02 Tim K. Davies, Sarah Martin, Chris Mees, Emmanuel Chassot and David M. Kaplan In this review, we bring together the most recent available evidence for conservation benefits provided by MPAs to pelagic species, taking the opportunity to provide critical discussion where it is appropriate to do so. We also provide an assessment on the impact of pelagic MPAs to fisheries, whether positive or negative. We focus here on the biological literature and do not discuss in detail the topics of governance or enforcement, except where these issues may have masked the effects of MPAs.
Fuel Consumption And Greenhouse Gas Emissions From Global Tuna Fisheries: A Preliminary Assessment 2012-03 Dr. Peter Tyedmers and Mr. Robert Parker Results of this study provide tuna fishermen, fisheries managers and other stakeholders with a first order estimate of the fuel use and carbon footprint of contemporary tuna fishing vessels, a baseline against which future performance can be measured, and insight into how changing fuel prices may affect different sectors of the tuna fishing fleet.
Status of the World Fisheries for Tuna: 2012 2012-04 ISSF There are 23 stocks of the major commercial tuna species worldwide (6 albacore, 4 bigeye, 4 bluefin, 5 skipjack and 4 yellowfin stocks). This document summarizes the results of the most recent scientific as-sessments of these stocks, as well as the current management measures adopted by the RFMOs. In addi-tion, this report ranks the status and management of the 23 stocks using a consistent methodology in terms of three factors: Abundance, Exploitation/Management (fishing mortality) and Environmental Im-pact (bycatch).
A review of bycatch in the Indian Ocean gillnet tuna fleet focussing on India and Sri Lanka 2012-05 MRAG The tuna fisheries of the Indian Ocean differ to those in other parts of the world in that artisanal and semi-industrial fisheries are responsible for over 54% of all catches , with gillnets responsible for 40% of all catch. The characteristics of the gillnet fisheries of Indian Ocean coastal States are largely unknown, as are levels of bycatch. Bycatch from gillnets is an issue of increasing global concern.
Environmental Policy and Political Realities: Fisheries Management & Job Creation in the Pacific Islands 2012-06 Joshua Graff Zivin, Maria Damon In this paper, we analyze job growth strategies in a developing country context that, like many of the world’s poorest regions, is heavily dependent on natural resources. The peer-reviewed, published version is available here.