Download or read book Improving Stock Assessments and Management Advice for Bluefin Tunas and Other Highly Migratory Species written by Lisa Elma Ailloud and published by . This book was released on 2018 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: For years bluefin tuna has been the poster child for overfishing and poor management. However, recent improvements in data collection, catch monitoring and international cooperation are providing an opportunity to reverse the perception of a fishery that is doomed to collapse. Stock assessments are conducted routinely to monitor the abundance and productivity of exploited fish stocks so managers can determine how many fish can be sustainably harvested each year. Should a stock be declared overfished or under-going overfishing, the science behind stock assessments also equip managers with the knowledge necessary to make decisions about what short-term and long-term management measures should be taken to help reverse these trends. in that light, the goal of my research has been to use newly available age data to improve the quality and reliability of assessments for Atlantic bluefin tuna by reducing uncertainty about the data and methods used to infer growth and age composition. A secondary goal has been to provide managers with the knowledge necessary to implement effective stock rebuilding programs for Pacific bluefin tuna. Chapter 2 is focused on cohort slicing, a method routinely used in the Atlantic bluefin tuna assessment to estimate catch-at-age from catch-at-size information. This chapter explores how errors in cohort sliced catch-at-age data can bias estimates of total mortality rate derived from catch curve analysis. Recommendations are provided concerning the appropriate mortality estimator and plus group to use depending on the parameters characterizing the stock. Chapter 3 provides updated growth estimates for western Atlantic bluefin tuna, which were adopted in 2017 as the basis for defining growth in the assessment. Chapter 4 provides an overview of the theory behind age-length keys with particular emphasis on the assumptions that govern each method and provides notes of caution concerning their applications to real data. Chapter 5 evaluates through simulation the relative performance of different methods for estimating age composition of western Atlantic bluefin tuna catches and applies the best performing technique, the combined forward-inverse age-length key, to actual western Atlantic bluefin tuna data. Chapter 6 moves over to the Pacific and focuses on evaluating the potential impacts of different minimum size regulations on the stock of Pacific bluefin tuna and explores ways in which to minimize short-term pain to the industry while still achieving long-term yield and conservation goals. Overall, this work has contributed major improvements to the stock assessment process of Atlantic bluefin tuna and implications of this work resonate beyond the bluefin tuna world to other highly migratory species faced with similar problems.
Download or read book A Future for Atlantic Bluefin Tuna written by Tiffany Jennifer Lee and published by . This book was released on 2010 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Improving Fish Stock Assessments written by National Research Council and published by National Academies Press. This book was released on 1998-02-27 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ocean harvests have plateaued worldwide and many important commercial stocks have been depleted. This has caused great concern among scientists, fishery managers, the fishing community, and the public. This book evaluates the major models used for estimating the size and structure of marine fish populations (stock assessments) and changes in populations over time. It demonstrates how problems that may occur in fisheries dataâ€"for example underreporting or changes in the likelihood that fish can be caught with a given type of gearâ€"can seriously degrade the quality of stock assessments. The volume makes recommendations for means to improve stock assessments and their use in fishery management.
Download or read book Atlantic Highly Migratory Species Atlantic Bluefin Tuna Quotas and Atlantic Tuna Fisheries Management Measures Us National Oceanic and Atmospheric Administration Regulation Noaa 2018 Edition written by The Law Library and published by Independently Published. This book was released on 2018-12-16 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Law Library presents the complete text of the Atlantic Highly Migratory Species - Atlantic Bluefin Tuna Quotas and Atlantic Tuna Fisheries Management Measures (US National Oceanic and Atmospheric Administration Regulation) (NOAA) (2018 Edition). Updated as of May 29, 2018 NMFS is modifying Atlantic bluefin tuna (BFT) base quotas for all domestic fishing categories; establishing BFT quota specifications for the 2011 fishing year; reinstating pelagic longline target catch requirements for retaining BFT in the Northeast Distant Gear Restricted Area (NED); amending the Atlantic tunas possession-at-sea and landing regulations to allow removal of Atlantic tunas tail lobes; and clarifying the transfer-at-sea regulations for Atlantic tunas. This action is necessary to implement recommendations of the International Commission for the Conservation of Atlantic Tunas (ICCAT), as required by the Atlantic Tunas Convention Act (ATCA), and to achieve domestic management objectives under the Magnuson-Stevens Fishery Conservation and Management Act (Magnuson-Stevens Act). This ebook contains: - The complete text of the Atlantic Highly Migratory Species - Atlantic Bluefin Tuna Quotas and Atlantic Tuna Fisheries Management Measures (US National Oceanic and Atmospheric Administration Regulation) (NOAA) (2018 Edition) - A dynamic table of content linking to each section - A table of contents in introduction presenting a general overview of the structure
Download or read book Getting Ahead of the Curve written by and published by . This book was released on 2000 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book H Con Res 268 a resolution regarding Atlantic highly migratory species including marlin written by United States. Congress. House. Committee on Resources. Subcommittee on Fisheries Conservation, Wildlife, and Oceans and published by . This book was released on 2003 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Assessment of Atlantic Bluefin Tuna written by National Research Council and published by National Academies Press. This book was released on 1994-02-01 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews and evaluates the scientific basis of U.S. management of fisheries for Atlantic bluefin tuna. In particular, it focuses on the issues of stock structure and stock assessments used by the National Oceanic and Atmospheric Administration's National Marine Fisheries Service for management under the International Convention for the conservation of Atlantic Tunas.
Download or read book Environmental Assessment Regulatory Impact Review and Final Regulatory Flexibility Analysis for a Rule to Adjust the Atlantic Bluefin Tuna General and Harpoon Category Regulations written by and published by . This book was released on 2011 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: "In this action, the National Marine Fisheries Service (NMFS) would adjust regulations governing the U.S. BFT fishery to : (1) Increase the General category maximum BFT daily retention limit from three to five fish (with limit adjustments to be executed via inseason actions when and if appropriate): (2) Allow the BFT General category season to remain open until the January subquota is reached or March 31 (whichever happens first): and (3) Increase the Harpoon category daily retention limit of BFT measuring 73 to 81 inches from two to four fish. This action is intended to enable more thorough utilization of the available U.S. BFT quota for the General and Harpoon permit categories: minimize bycatch and bycatch mortality to the extent practicable: expand fishing opportunities for participants in the commercial winter General category fishery: and increase NMFS' flexibility for selling the General category retention limit depending on available quota. This action would be consistent with the Magnuson-Stevens Fishery Conservation and Management Act, the Atlantic Tunas Convention Act, and the 2006 Consolidated Atlantic Highly Migratory Species Fishery Management Plan. This action is not expected to significantly alter current fishing practices and bycatch mortality rates, or increase fishing effort, and it is not expected to change previously analyzed endangered species or marine mammal interaction rates or magnitudes."--Cover letter; Portfolio comprised of two related PDF documents digitized and organized by: NOAA Office of Program Planning and Integration (PPI) National Environmental Policy Act (NEPA) staff.
Download or read book Consolidated Atlantic Highly Migratory Species Fishery Management Plan written by and published by . This book was released on 2006 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Northern Atlantic Bluefin tuna fisheries management and policy implications written by Trond Bjørndal and published by . This book was released on 2004 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atlantic Bluefin Tuna Stocks written by United States. Congress. Senate. National Ocean Policy Study and published by . This book was released on 1982 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atlantic Highly Migratory Species Individual Bluefin Quota Program Accountability for Bluefin Tuna Catch Us National Oceanic and Atmospheric Administration Regulation Noaa 2018 Edition written by The Law Library and published by Independently Published. This book was released on 2019-01-11 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Law Library presents the complete text of the Atlantic Highly Migratory Species - Individual Bluefin Quota Program - Accountability for Bluefin Tuna Catch (US National Oceanic and Atmospheric Administration Regulation) (NOAA) (2018 Edition). Updated as of May 29, 2018 NMFS modifies the Atlantic highly migratory species (HMS) regulations to require vessels in the pelagic longline fishery to account for bycatch of bluefin tuna (bluefin) using Individual Bluefin Quota (IBQ) on a quarterly basis instead of on a trip-level basis. Previously, vessel owners had to account for quota debt or IBQ balances less than the minimum required before commencing any fishing trip with pelagic longline gear. With this rulemaking, vessels may fish during a given calendar quarter if they have an IBQ balance below the minimum amount required to depart on a fishing trip or with quota debt incurred by exceeding their IBQ balance; however, vessels are required to reconcile quota debt and satisfy the minimum IBQ requirement prior to departing on their first pelagic longline fishing trip in each calendar quarter. The action optimizes fishing opportunity in the directed pelagic longline fishery for target species such as tuna and swordfish and improves the functionality of the IBQ Program and its accounting provisions, consistent with the objectives of Amendment 7 to the 2006 Consolidated HMS Fishery Management Plan (FMP). This ebook contains: - The complete text of the Atlantic Highly Migratory Species - Individual Bluefin Quota Program - Accountability for Bluefin Tuna Catch (US National Oceanic and Atmospheric Administration Regulation) (NOAA) (2018 Edition) - A dynamic table of content linking to each section - A table of contents in introduction presenting a general overview of the structure
Download or read book Atlantic Highly Migratory Species Atlantic Bluefin Tuna Quota Specifications and Effort Controls Us National Oceanic and Atmospheric Administration Regulation Noaa 2018 Edition written by The Law Library and published by Independently Published. This book was released on 2019 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Law Library presents the complete text of the Atlantic Highly Migratory Species - Atlantic Bluefin Tuna Quota Specifications and Effort Controls (US National Oceanic and Atmospheric Administration Regulation) (NOAA) (2018 Edition). Updated as of May 29, 2018 NMFS announces the final initial 2006 fishing year specifications for the Atlantic bluefin tuna (BFT) fishery to set BFT quotas for each of the established domestic fishing categories and to set General and Angling category effort controls. This action is necessary to implement recommendations of the International Commission for the Conservation of Atlantic Tunas (ICCAT), as required by the Atlantic Tunas Convention Act (ATCA), and to achieve domestic management objectives under the Magnuson-Stevens Fishery Conservation and Management Act (Magnuson-Stevens Act). This ebook contains: - The complete text of the Atlantic Highly Migratory Species - Atlantic Bluefin Tuna Quota Specifications and Effort Controls (US National Oceanic and Atmospheric Administration Regulation) (NOAA) (2018 Edition) - A dynamic table of content linking to each section - A table of contents in introduction presenting a general overview of the structure
Download or read book Supplemental Environmental Assessment Regulatory Impact Review and Final Regulatory Flexibility Analysis for the Final 2010 Atlantic Bluefin Tuna Quota Specifications written by and published by . This book was released on 2010 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The National Marine Fisheries Service is establishing the total U.S. BFT quota and subquotas for 2010 based on the 2008 International Commission for the Conservation of Atlantic Tunas (ICCAT) recommendation for the western BFT stock for 2010 (part of a two-year recommendation) and adjusting the 2010 quotas for each category as necessary based on landings from 2009. [The] purpose of this action is to implement the 2008 ICCAT recommendation as necessary and appropriate pursuant to the Atlantic Tunas Convention Act and to achieve domestic management objectives under the Magnuson-Stevens Fishery Conservation and Management Act. These measures would be consistent with the 2006 Consolidated Highly Migratory Species Fishery Management Plan, including the BFT rebuilding program. This action is not expected to significantly alter current fishing practices or increase fishing effort, would not be expected to change previously analyzed endangered species or marine mammal interaction rates or magnitudes, or affect critical habitat"--Cover letter.
Download or read book Atlantic Highly Migratory Species Bluefin Tuna Bycatch Reduction in Gulf of Mexico Pelagic Longline Fishery Us National Oceanic and Atmospheric Administration Regulation Noaa 2018 Edition written by The Law Library and published by Independently Published. This book was released on 2019-01-02 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Law Library presents the complete text of the Atlantic Highly Migratory Species - Bluefin Tuna Bycatch Reduction in Gulf of Mexico Pelagic Longline Fishery (US National Oceanic and Atmospheric Administration Regulation) (NOAA) (2018 Edition). Updated as of May 29, 2018 Under this final rule, NMFS requires the use of "weak hooks" in the Gulf of Mexico (GOM) pelagic longline (PLL) fishery. A weak hook is a circle hook that meets NMFS' current size and offset restrictions for the GOM PLL fishery, but is constructed of round wire stock that is thinner-gauge than the circle hooks currently used and is no larger than 3.65 mm in diameter. Weak hooks can allow incidentally hooked bluefin tuna (BFT) to escape capture because the hooks are more likely to straighten when a large fish is hooked. Requiring weak hooks in the GOM will reduce bycatch of BFT; allow the long-term beneficial socio-economic benefits of normal operation of directed fisheries in the GOM with minimal short-term negative socio-economic impacts; and have both short- and long-term beneficial impacts on the stock status of Atlantic BFT, an overfished species. This action affects commercial fishermen using PLL gear to fish for Atlantic Highly Migratory Species (HMS) in the GOM. This ebook contains: - The complete text of the Atlantic Highly Migratory Species - Bluefin Tuna Bycatch Reduction in Gulf of Mexico Pelagic Longline Fishery (US National Oceanic and Atmospheric Administration Regulation) (NOAA) (2018 Edition) - A dynamic table of content linking to each section - A table of contents in introduction presenting a general overview of the structure
Download or read book The Atlantic Bluefin Tuna written by Anna Ter Molen and published by LAP Lambert Academic Publishing. This book was released on 2012-03 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the recognition of a 200-nautical-mile jurisdictional zone, or EEZ, for coastal States in the UN Law of the Sea Convention, coastal States have gained the right to establish conservation and management measures regarding highly migratory fish species, such as the Atlantic bluefin tuna, for a far wider area than ever before. Since these highly migratory species, do not remain in one particular jurisdictional area, but exist between the jurisdictional areas of multiple coastal States and the high seas, the need for inter-state cooperation is evident. This cooperation with regard to this tuna species comes in the form of a RFMO, namely ICCAT. However international criticism has grown regarding the unsustainable approach to high seas fisheries management held by ICCAT up to recent years. The decreasing health of the endangered Atlantic bluefin tuna stock has led to a 2010 proposal to include this tuna on Appendix I of the CITES Convention. This thesis will further explore aforementioned conventions, as well as the UN Fish Stocks Agreement, as regulatory mechanisms that (could) provide legal tools to create a more sustainable conservation management for the Atlantic bluefin tuna.
Download or read book World Meeting on Stock Assessment of Bluefin Tunas written by Richard B. Deriso and published by . This book was released on 1991 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt:
