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  • Management  (126)
  • Sociology  (29)
  • Cell & Developmental Biology
  • Inorganic Chemistry
  • NOAA/National Marine Fisheries Service  (91)
  • Jinja, Uganda
  • 1
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    NOAA/National Marine Fisheries Service | Washington, D.C.
    In:  http://aquaticcommons.org/id/eprint/14563 | 403 | 2014-02-19 22:20:21 | 14563 | United States National Marine Fisheries Service
    Publication Date: 2021-06-28
    Description: The National Marine Fisheries Service (NMFS) is dedicated to the stewardship of living marine resources (LMR’s). This is accomplished through science-based conservation and management, and the promotion of healthy ecosystems. As a steward, NMFS has an obligation to conserve, protect, and manage these resources in a way that ensures their continuation as functioning components of healthy marine ecosystems, affords economic opportunities, and enhances the quality of life for the American public. In addition to its responsibilities within the U.S. Exclusive Economic Zone (EEZ), NMFS plays a supportive and advisory role in the management of LMR’s in the coastal areas under state jurisdiction and provides scientific and policy leadership in the international arena. NMFS also implements international measures for the conservation and management of LMR’s, as appropriate.NMFS receives its stewardship responsibilities under a number of Federal laws. These include the Nation’s primary fisheries law, the Magnuson Fishery Conservation and Management Act. This law was first passed in 1976, later reauthorized as the Magnuson-Stevens Fishery Conservation and Management Act in 1996, and reauthorized again on 12 January 2007 as the Magnuson-Stevens Fishery Conservation and Management Reauthorization Act (MSRA). The MSRA mandates strong action to conserve and manage fishery resources and requires NMFS to end overfishing by 2010 in all U.S. commercial and recreational fisheries, rebuild all overfished stocks, and conserve essential fish habitat.
    Keywords: Ecology ; Fisheries ; Management
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 369
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  • 2
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    NOAA/National Marine Fisheries Service | Seattle, WA
    In:  beth.matta@noaa.gov | http://aquaticcommons.org/id/eprint/14559 | 403 | 2014-02-21 00:23:02 | 14559 | United States National Marine Fisheries Service
    Publication Date: 2021-06-28
    Description: The Age and Growth Program at the Alaska Fisheries Science Center is tasked with providing age data in order to improve the basic understanding of the ecology and fisheries dynamics of Alaskan fish species. The primary focus of the Age and Growth Program is to estimate ages from otoliths and other calcified structures for age-structured modeling of commercially exploited stocks; however, the program has recently expanded its interests to include numerous studies on topics ranging from age estimate validation to the growth and life history of non-target species. Because so many applications rely upon age data and particularly upon assurances as to their accuracy and precision, the Age and Growth Program has developed this practical guide to document the age determination of key groundfish species from Alaskan waters. The main objective of this manual is to describe techniques specific to the age determination of commercially and ecologically important species studied by the Age and Growth Program. The manual also provides general background information on otolith morphology, dissection, and preparation, as well as descriptions of methods used to measure precision andaccuracy of age estimates. This manual is intended not only as a reference for age readers at the AFSC and other laboratories, but also to give insight into the quality of age estimates to scientists who routinely use such data.
    Keywords: Ecology ; Fisheries ; Management
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 97
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  • 3
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    NOAA/National Marine Fisheries Service | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14566 | 403 | 2014-02-20 18:26:54 | 14566 | United States National Marine Fisheries Service
    Publication Date: 2021-06-28
    Description: This report argues for greatly increased resources in terms of data collection facilities and staff to collect, process, and analyze the data, and to communicate the results, in order for NMFS to fulfill its mandate to conserve and manage marine resources. In fact, the authors of this report had great difficulty defining the "ideal" situation to which fisheries stock assessments and management should aspire. One of the primary objectives of fisheries management is to develop sustainable harvest policies that minimize the risks of overfishing both target species and associated species. This can be achieved in a wide spectrum of ways, ranging between the following two extremes. The first is to implement only simple management measures with correspondingly simple assessment demands, which will usually mean setting fishing mortality targets at relatively low levels in order to reduce the risk of unknowingly overfishing or driving ecosystems towards undesirable system states. The second is to expand existingdata collection and analysis programs to provide an adequateknowledge base that can support higher fishing mortality targets while still ensuring low risk to target and associated species and ecosystems. However, defining "adequate" is difficult, especially when scientists have not even identified all marine species, and information on catches, abundances, and life histories of many target species, and most associated species, is sparse. Increasing calls from the public, stakeholders, and the scientific community to implement ecosystem-based stock assessment and management make it even more difficult to define "adequate," especially when "ecosystem-based management" is itself not well-defined. In attempting to describe the data collection and assessment needs for the latter, the authors took a pragmatic approach, rather than trying to estimate the resources required to develop a knowledge base about the fine-scale detailed distributions, abundances, and associations of all marine species. Thus, the specified resource requirements will not meet the expectations of some stakeholders. In addition, the Stock Assessment Improvement Plan is designed to be complementary to other related plans, and therefore does not duplicate the resource requirements detailed in those plans, except as otherwise noted.
    Keywords: Biology ; Ecology ; Fisheries ; Management
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 140
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  • 4
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    NOAA/National Marine Fisheries Service
    In:  http://aquaticcommons.org/id/eprint/14826 | 403 | 2014-02-28 21:18:46 | 14826 | United States National Marine Fisheries Service
    Publication Date: 2021-06-25
    Description: The 1997 reauthorization of the Atlantic Striped Bass Conservation Act (Striped Bass Act) mandated biennial reports to Congress and to the Atlantic States Marine Fisheries Commission (Commission) from the secretaries of the Department of Commerce and the Department of the Interior concerning the progress and findings of studies of Atlantic striped bass (Morone saxatilis). The Striped Bass Act specifically requests updates on studies that include, but are not limited to: annual stock assessments, investigations on the causes of fluctuations in Atlantic striped bass populations, the effects of environmental factors on the recruitment, spawning potential, mortality, and abundance of Atlantic striped bass populations, and investigations of interactions between Atlantic striped bass and other fish. This document is the fifth such report to Congress and includes data available through 2007 with emphasis on the 2005 and 2006 calendar years.
    Description: Submitted by the National Marine Fisheries Service and U.S. Fish and Wildlife Service to the Committee on Resources of the United States House of Representatives and the Committee on Commerce, Science, and Transportation of the United States Senate.
    Keywords: Fisheries ; Management
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 25
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  • 5
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    Lake Victoria Fisheries Research Project | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/4926 | 424 | 2011-09-29 15:42:28 | 4926 | Lake Victoria Fisheries Organization
    Publication Date: 2021-07-07
    Description: Multimesh, multidepth gillnet fleets are useful in assessing fish stock abundance, size distribution and depth distribution. Using data collected on net mesh selectivity for Nile perch, Lates niloticus (L.), in the Kenyan waters of Lake Victoria, suitable mesh sizes for gillnet fleets for use in the Lake Victoria Fisheries Research Project were determined. The modal selection length for Nile perch in the mesh sized used in the earlier experiment were determined, as was the size range vulnerable to capture.Initial trials suggest 60% of the Nile perch swim within 5 m of the bottom. Setting and hauling of the nets is simple and quick, allowing the nets to be used at the same time as other sampling programmes.
    Description: Lake Victoria Fisheries Research Project Phase II
    Description: LVFRP/TECH/99/06; This is Part 2 of LVFRP Technical Document No 6; Part 1 of LVFRP Technical Document No 6's title is: Report on third FIDAWOG workshop held at the Triangle Hotel, Jinja, 29 March to 1 april 1999.
    Keywords: Fisheries ; Management ; Africa ; Kenya ; Lake Victoria ; stock assessment ; gillnet fleets ; Lates niloticus
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 1-12
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  • 6
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    Lake Victoria Fisheries Research Project | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/4928 | 424 | 2011-09-29 15:42:30 | 4928 | Lake Victoria Fisheries Organization
    Publication Date: 2021-07-07
    Description: Co-management is typically known to be a resource management system that shares managerial responsibility between the state and other stakeholders of a resource. In the case of Lake Victoria, one would expect the state to be represented by the fisheries departments of Kenya, Uganda and Tanzania, while stakeholder groups may comprise fishing communities, fish processing factories and municipalities.Taking that into account, the survey's objectives were defined as:(a) To identify the difficulties and impracticalities inherent in implementing state-based regulations via a "top-down" management strategy.(b) To assess the prevalence of community-based institutions that either seek to regulate the fishery or have the potential to be used to regulate it.(c) To identify ways in which community-based regulatory and monitory systems may be established, and how these will fare over time.(d) To identify roles for national Fisheries Departments, industrial fish processors and other stakeholders.(e) To develop well-founded policy suggestions for the establishment of a co-management framework to manage the fisheries of Lake Victoria.
    Description: Lake Victoria Fisheries Research Project Phase II
    Description: LVFRP/TECH/00/11
    Keywords: Fisheries ; Management ; Policies ; Africa ; Lake Victoria ; co-management ; fisheries stakeholders ; community-based institutions
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 1-10
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  • 7
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    Lake Victoria Fisheries Research Project | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/4929 | 424 | 2011-09-29 15:43:05 | 4929 | Lake Victoria Fisheries Organization
    Publication Date: 2021-07-07
    Description: In this brief introduction, we set out to provide an overview of the Lake Victoria Fisheries Research Project (LVFRP) and, more specifically, its socio-economic program, and to define the place of the Co-management Survey within the activities of the LVFRP as a whole.
    Description: Lake Victoria Fisheries Research Project Phase II
    Description: LVFRP/TECH/00/11
    Keywords: Fisheries ; Management ; Policies ; Africa ; Lake Victoria ; co-management ; fisheries stakeholders ; community-based institutions
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 11-12
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  • 8
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    Lake Victoria Fisheries Research Project | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/4925 | 424 | 2011-09-29 15:42:26 | 4925 | Lake Victoria Fisheries Organization
    Publication Date: 2021-07-07
    Description: Three Lake Victoria rivers were sampled to assess fish abundance and distribution in preparation for assessment of catches from the river systems. Preliminary fish abundance data indicate that fishing potential upstream is negligible but that important commercial species are present in the downstream floodplain areas. Three catfish species were recorded in the Nzoia river system that have not been found previously in the Kenyan sector of the Lake Victoria system, together with possibly two undescribed Barbus species.
    Description: Lake Victoria Fisheries Research Project Phase II
    Description: LVFRP/TECH/99/06; The document includes 6 tables.
    Keywords: Fisheries ; Limnology ; Management ; Africa ; Kenya ; Lake Victoria ; river Nzoia ; river Nyando ; river Sondu Miriu ; stock assessment ; inland fisheries
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 106-125
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  • 9
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    Lake Victoria Fisheries Research Project | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/4933 | 424 | 2011-09-29 15:42:16 | 4933 | Lake Victoria Fisheries Organization
    Publication Date: 2021-07-07
    Description: This short book section analyses the role of Fisheries Department personnel in the process of co-management related to the LVFRP.
    Description: Lake Victoria Fisheries Research Project Phase II
    Description: LVFRP/TECH/00/11
    Keywords: Fisheries ; Management ; Policies ; Africa ; Lake Victoria ; co-management ; fisheries stakeholders ; community-based institutions
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 63-64
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  • 10
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    Lake Victoria Fisheries Research Project | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/4930 | 424 | 2011-09-29 15:42:24 | 4930 | Lake Victoria Fisheries Organization
    Publication Date: 2021-07-07
    Description: In this book section, the theoretical background to the methodology is outlined, questionnaire development described, sample selection outlined and biases and shortcomings to the survey noted.
    Description: Lake Victoria Fisheries Research Project Phase II
    Description: LVFRP/TECH/00/11
    Keywords: Fisheries ; Management ; Policies ; Africa ; Lake Victoria ; co-management ; fisheries stakeholders ; community-based institutions
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 13-48
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  • 11
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    Lake Victoria Fisheries Research Project | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/4932 | 424 | 2011-09-29 15:42:18 | 4932 | Lake Victoria Fisheries Organization
    Publication Date: 2021-07-07
    Description: As it is clearly stated in the title, this book section aims to identify fishers' livelihoods and their role as a stakeholder in the process of co-management with the other stakeholders and official institutions within the LVFRP.
    Description: Lake Victoria Fisheries Research Project Phase II
    Description: LVFRP/TECH/00/11
    Keywords: Fisheries ; Management ; Policies ; Africa ; Lake Victoria ; co-management ; fisheries stakeholders ; community-based institutions
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 49-62
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  • 12
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    Lake Victoria Fisheries Research Project | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/4935 | 424 | 2011-09-29 15:41:19 | 4935 | Lake Victoria Fisheries Organization
    Publication Date: 2021-07-07
    Description: This book section aims to synthesise the results of the surveys related to the LVFRP by developing different strategies to implement a sustainable and participative co-management model.
    Description: Lake Victoria Fisheries Research Project Phase II
    Description: LVFRP/TECH/00/11
    Keywords: Fisheries ; Management ; Policies ; Africa ; Lake Victoria ; co-management ; fisheries stakeholders ; community-based institutions
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 74-94
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  • 13
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    Lake Victoria Fisheries Research Project | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/4934 | 424 | 2011-09-29 15:42:03 | 4934 | Lake Victoria Fisheries Organization
    Publication Date: 2021-07-07
    Description: This book section analyses the role of fish processing factories in the process of co-management related to the LVFRP.
    Description: Lake Victoria Fisheries Research Project Phase II
    Description: LVFRP/TECH/00/11
    Keywords: Fisheries ; Management ; Policies ; Africa ; Lake Victoria ; co-management ; fisheries stakeholders ; community-based institutions
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 65-73
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  • 14
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    Lake Victoria Fisheries Research Project | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/4942 | 424 | 2011-09-29 15:41:17 | 4942 | Lake Victoria Fisheries Organization
    Publication Date: 2021-07-07
    Description: This paper analyses the location, potentialities and set-backs of Nkombe Beach, the landing site chosen in Uganda for the 4-beaches survey.
    Description: Lake Victoria Fisheries Research Project Phase II
    Description: LVFRP/TECH/00/17
    Keywords: Fisheries ; Management ; Africa ; Uganda ; Nkombe Beach ; Lake Victoria ; co-management ; fisheries stakeholders
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 49-53
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  • 15
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    Lake Victoria Fisheries Research Project | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/4937 | 424 | 2011-09-29 15:41:59 | 4937 | Lake Victoria Fisheries Organization
    Publication Date: 2021-07-07
    Description: 1) The 4-beaches survey was the first of its kind on Lake Victoria. Drawing on Participatory Rural Appraisal (PRA) techniques, four landing sites around the lake were selected for long-term monitoring from March 2000 through to October 2001.2)Held in all the 3 riparian countries of Lake Victoria the stakeholders' workshops aimed to assess the necessity of fisheries management for Lake Victoria and to identify who the stakeholders in fisheries management would be.
    Description: Lake Victoria Fisheries Research Project Phase II
    Description: LVFRP/TECH/00/17
    Keywords: Fisheries ; Management ; Africa ; Lake Victoria ; co-management ; fisheries stakeholders
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 1-18
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  • 16
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    Lake Victoria Fisheries Research Project | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/4943 | 424 | 2011-09-29 15:41:09 | 4943 | Lake Victoria Fisheries Organization
    Publication Date: 2021-07-07
    Description: Two landing sites were chosen in Tanzania for the 4-beaches survey. The former, Ihale, is a large one with an avarage of 120 boats and direct connections to the fish processing factories. The latter, Mwasonge, is one of the smallest landing sites in the Mwanza region with totally different characteristics. This book section aims to analyse the results from these two sites in the context of the co-management potentialities in Tanzania and more generally on the Lake Victoria region.
    Description: Lake Victoria Fisheries Research Project Phase II
    Description: LVFRP/TECH/00/17
    Keywords: Fisheries ; Management ; Africa ; Tanzania ; Ihale ; Mwasonge ; Lake Victoria ; co-management ; fisheries stakeholders
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 54-62
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  • 17
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    Lake Victoria Fisheries Research Project | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/4936 | 424 | 2011-09-29 15:41:22 | 4936 | Lake Victoria Fisheries Organization
    Publication Date: 2021-07-07
    Description: The purpose of this Fisheries Management Plan (FMP) within the Lake Victoria Fisheries Research Project was to sustain the livelihoods of the communities who depend on the fishery resources of the lake and to reduce poverty, food insecurity and unemployment. To achieve this goals, a better management of the resources, which would mobilize and include stakeholders at local, regional, national and international level was believed to be the right strategy for success. (PDF contains 79 pages)
    Description: Lake Victoria Fisheries Research Project Phase II
    Description: LVFRP/TECH/01/16; Introductory pages i to viii include table of contents, acronyms and an executive summary
    Keywords: Fisheries ; Management ; Planning ; Africa ; Lake Victoria ; co-management ; fisheries stakeholders ; community-based institutions ; livelihoods
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 1-64
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    Lake Victoria Fisheries Research Project | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/4946 | 424 | 2011-09-29 15:40:36 | 4946 | Lake Victoria Fisheries Organization
    Publication Date: 2021-07-07
    Description: This book section aims to give an overview of the Stakeholders' Workshop taken at Mwanza (Tanzania) to evaluate the role and potentials of local stakeholders, in relation to the co-management of Lake Victoria's fisheries within the frame of the LVFRP.
    Description: Lake Victoria Fisheries Research Project Phase II
    Description: LVFRP/TECH/00/17
    Keywords: Fisheries ; Management ; Africa ; Tanzania ; Mwanza ; Lake Victoria ; co-management ; fisheries stakeholders
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 105-119
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  • 19
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    Lake Victoria Fisheries Research Project | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/4944 | 424 | 2011-09-29 15:41:06 | 4944 | Lake Victoria Fisheries Organization
    Publication Date: 2021-07-07
    Description: This book section is a review of a workshop, the one held at Jinja in Uganda, which aimed to assess the potential local stakeholders within the frame of the co-management of Lake Victoria's fisheries.
    Description: Lake Victoria Fisheries Research Project Phase II
    Description: LVFRP/TECH/00/17
    Keywords: Fisheries ; Management ; Africa ; Uganda ; Jinja ; Lake Victoria ; co-management ; fisheries stakeholders
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 63-79
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    Lake Victoria Fisheries Research Project | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/4938 | 424 | 2011-09-29 15:42:01 | 4938 | Lake Victoria Fisheries Organization
    Publication Date: 2021-07-07
    Description: As it is clearly indicated in the title of this book section, it overviews the methodologies used in the 4-beaches Survey and in the various Stakeholders' Workshops held in all the three riparian countries of the Lake Victoria.
    Description: Lake Victoria Fisheries Research Project Phase II
    Description: LVFRP/TECH/00/17
    Keywords: Fisheries ; Management ; Africa ; Lake Victoria ; co-management ; fisheries stakeholders
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 19-38
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    Lake Victoria Fisheries Research Project | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/4947 | 424 | 2011-09-29 15:40:56 | 4947 | Lake Victoria Fisheries Organization
    Publication Date: 2021-07-07
    Description: This short paper aims to give an overview of all the conclusions and recommendations related to the 4-beaches Survey and the Stakeholders' Workshops held in all the three Lake Victoria riparian countries within the frame of the LVFRP.
    Description: Lake Victoria Fisheries Research Project Phase II
    Description: LVFRP/TECH/00/17
    Keywords: Fisheries ; Management ; Africa ; Kenya ; Obenge ; Bondo ; Uganda ; Nkombe Beach ; Jinja ; Tanzania ; Ihale ; Mwasonge ; Mwanza ; Lake Victoria ; co-management ; fisheries stakeholders
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 120-122
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    Lake Victoria Fisheries Research Project | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/4945 | 424 | 2011-09-29 15:40:33 | 4945 | Lake Victoria Fisheries Organization
    Publication Date: 2021-07-07
    Description: This paper is a review of the workshop held at Bondo in Kenya to assess the role of local stakeholders in the of co-management of Lake Victoria's fisheries within the frame of the LVFRP.
    Description: Lake Victoria Fisheries Research Project Phase II
    Description: LVFRP/TECH/00/17
    Keywords: Fisheries ; Management ; Africa ; Kenya ; Bondo ; Lake Victoria ; co-management ; fisheries stakeholders
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 80-104
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    Lake Victoria Fisheries Research Project | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/5018 | 424 | 2011-09-29 15:33:09 | 5018 | Lake Victoria Fisheries Organization
    Publication Date: 2021-07-07
    Description: This document contains the findings of the second Participatory Rural Appraisal (PRA) carried out under the LVFRP. Its principal objectives were to develop base-line information on a Ugandan beach for the 3-beaches survey of the LVFRP.
    Description: Lake Victoria Fisheries Research Project Phase II
    Description: LVFRP/TECH/00/09
    Keywords: Fisheries ; Management ; Sociology ; Africa ; Uganda ; Lwalalo Beach ; Lake Victoria ; Co-management ; artisanal fisheries
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 36-70
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    Lake Victoria Fisheries Research Project | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/5016 | 424 | 2011-09-29 15:33:16 | 5016 | Lake Victoria Fisheries Organization
    Publication Date: 2021-07-07
    Description: As stated in the title, this is an introduction to all the reports contained in this technical document and related to the various workshops on Participatory Rural Appraisal (PRA) held in all the riparian countries around Lake Victoria within the LVFRP.
    Description: Lake Victoria Fisheries Research Project Phase II
    Description: LVFRP/TECH/00/09; The title of this document reads erroneously "Introduction to LVFRP Technical Document 10". It is in fact in document 9 and obviously relates to all the reports contained in it.
    Keywords: Fisheries ; Management ; Sociology ; Africa ; Lake Victoria ; Co-management ; artisanal fisheries
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 1-4
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    Lake Victoria Fisheries Research Project | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/5020 | 424 | 2011-09-29 15:32:34 | 5020 | Lake Victoria Fisheries Organization
    Publication Date: 2021-07-08
    Description: This document contains the findings of the fourth Participatory Rural Appraisal (PRA) carried out under the LVFRP. Its principal objectives were to develop base-line information on a Ugandan beach for the 3-beaches survey of the LVFRP.
    Description: Lake Victoria Fisheries Research Project Phase II
    Description: LVFRP/TECH/00/09
    Keywords: Fisheries ; Management ; Sociology ; Africa ; Uganda ; Nkombe Beach ; Lake Victoria ; Co-management ; artisanal fisheries
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 120-146
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    Lake Victoria Fisheries Research Project | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/5017 | 424 | 2011-09-29 15:33:13 | 5017 | Lake Victoria Fisheries Organization
    Publication Date: 2021-07-07
    Description: Ihale is a large landing site lying approximately 65 km. from Mwanza along the main Mwanza-Musoma highway. Ihale Beach was selected as a potential candidate for the 3-beaches study because of its proximity to Mwanza, and hence suitability for frequent monitoring; and because it is served by a road accessible during the rainy seasons. As with the first training Participatory Rural Appraisal (PRA) on Kiumba Beach on Kenya's Rusinga Island, the objectives with this PRA were as follows: (a) To identify and understand Ihale's community-based organizations and institutions which have a role in the lake's fishery. (b) To consider the key issues which arise from this study for the involvement of communities and community-based organizations and/or institutions such as those at Ihale Beach, in the co-management of Lake Victoria's fishery.
    Description: Lake Victoria Fisheries Research Project Phase II
    Description: LVFRP/TECH/00/09
    Keywords: Fisheries ; Management ; Sociology ; Africa ; Tanzania ; Ihale Beach ; Lake Victoria ; Co-management ; artisanal fisheries
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    Lake Victoria Fisheries Research Project | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/5021 | 424 | 2011-09-29 15:32:37 | 5021 | Lake Victoria Fisheries Organization
    Publication Date: 2021-07-08
    Description: This paper comprises part of the so-called "3-beaches Survey" of the LVFRP. In Tanzania, this study has developed to examine two landing sites (Mwasonge and Ihale), and to chart the progress of the newly established Beach Management Units (BMU) at each beach, comparing one BMU against the other. The over-arching objective of this survey was to develop an understanding of the context in which Mwasonge's fishery exists. The study does so by examining the community's history, culture and beliefs, various other socio-cultural factors, their resources, society and economy, wealth and the community's perceptions of wealth. Importantly, the survey examines the community's institutions and its perceptions of fishing rules and changes within the fishery. All of these facets of community life are examined with the use of participatory Rural Appraisal tools, and the images that the study generated are reproduced herein.
    Description: Lake Victoria Fisheries Research Project Phase II
    Description: LVFRP/TECH/00/09; This article includes a 3-pages appendix which is a glossary of English towards local languages of the Lake Victoria area related to fish and fisheries.
    Keywords: Fisheries ; Management ; Sociology ; Africa ; Tanzania ; Mwasonge Beach ; Lake Victoria ; Co-management ; artisanal fisheries
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    Lake Victoria Fisheries Research Project | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/5019 | 424 | 2011-09-29 15:32:04 | 5019 | Lake Victoria Fisheries Organization
    Publication Date: 2021-07-08
    Description: This document contains the findings of the third Participatory Rural Appraisal (PRA) carried out on Obenge Beach in Kenya, from the 23rd to the 26th of June 2000, under the LVFRP. Its principal objectives were to develop base-line information on a Kenyan beach for the 3-beaches survey of the LVFRP.
    Description: Lake Victoria Fisheries Research Project Phase II
    Description: LVFRP/TECH/00/09
    Keywords: Fisheries ; Management ; Sociology ; Africa ; Kenya ; Obenge Beach ; Lake Victoria ; Co-management ; artisanal fisheries
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/17220 | 4230 | 2021-02-27 20:52:02 | 17220 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-11
    Description: The study is prompted by the poverty that persisted among the fishing communities of lake victoria at time of considerable cash inflow into the fisheries development of fish processing industry. There has been need for understanding of the poverty and what strategies would be most appreciate for it's reduction.This study has attempted to respond to the needby identifying the nature and distribution of the poverty within the fisheries lake victoria,Uganda, the factor responsible for itand the options for poverty reduction intervention. The study examined the global and regional perspectives of poverty and wealth distribution, noting that wide disparities existed between the developed and the developing world and also between the developing countries themselves. A historical review of development policies and strategies revealed that while successive strategies were able to contribute to growth, their achievement towards poverty alleviation were less than satisfactory, hence the need forcontinually developing new strategies.A background to Uganda’s society and economy is provided, examining the demographic, political, environmental and economic conditions of the country. Uganda’s developmentstrategies are reviewed, highlighting the role of the Poverty Eradication Action Plan, Uganda’s main strategy for implementing the policy of poverty reduction and wealthdistribution. At the agricultural sector level, the Plan for the Modernisation of Agriculture has been formulated, followed by the National Fisheries Policy, aimed at providing a policy framework for the management and development of the fisheries.An appropriate definition of poverty was formulated, considered relevant to the situation ofLake Victoria. The dimensions of poverty included inadequate basic necessities, low education and health achievements, a sense of insecurity and exposure to risk. The research methodology was enhanced by the examination of the Lélé Model of the Poverty–Environmental Degradation problem, the World Bank Model of Poverty Causation and thesubsequent Lake Victoria Model developed in this study. It has provided a plan for the research, the consideration of criteria and a data collection plan. The data collectioninstruments included secondary data search, key informant interviews and a sample survey based on a structured questionnaire.The study identified all the four dimensions of poverty in the fisheries, provided poverty profiles with respect to the different activities, groups of people and regions in the fisheries, based on consumption poverty. Among the people identified to be in poverty were the fishing labourers, fishers of Oreochromis niloticus and those operating with non-powered boats. In the post-harvest fisheries, large proportions of processors involved in salting and sun-drying, market stall and bicycle traders were in the poverty category. The ethnic groups most affected included the Samia, Basoga and Bakenye while the Districts of Jinja, Bugiri and Busia had the highest proportions of fishers in the poverty category. With respect to the other dimensions of poverty, the study showed that educational achievement was low within the fishing communities. The health status was poor, due mainly to the prevalence of malaria, diarrhoea, bilharzia and HIV/AIDS. There was a sense of insecurity within certain sections of the fishing community, due to leadership weaknesses within the local as well as the Government institutions. Some community members operated in a state of risk because they were vulnerable to episodes of income, health and education. The causes of poverty in fisheries included weaknesses within the institutional and social environment, limitations in the technology available to the poor, resource degradation and unfavourable economic factors. The recommendations of the study for poverty reduction included strengthening of policies, developing links, improving capacities and increasing resources, to be applied at the levels of Central Government, Local Government and of the community. In view of the achievements of the methodology used on this study, involving reference to the models, it is recommended that future research should build upon this model approach, as it will continue to produce results, especially when attempting to forecast changes relating to interventions.
    Description: Lake Victoria Environmental Management Project (LVEMP)
    Keywords: Fisheries ; Sociology
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/17208 | 4230 | 2021-02-27 20:44:10 | 17208 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-11
    Description: The purpose of the study was to investigate migratory movements of fishermen on lake victoria.To identify the cuases of fishrmen migration with a view to establishing the paterns of migration;determining season of migration and assessing the impacts of migration on fisheries management and development.
    Description: Implementation of a Fisheries Management Plan (IFMP)
    Keywords: Fisheries ; Sociology ; Lake Victoria Fisheries Research Organization ; LVFO
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/17223 | 4230 | 2016-02-19 11:12:33 | 17223 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-11
    Description: postive transformation of the fisheries sector in Uganda has of recent been scatted by failure to mountain fish quality and safety,akey prerequiste for retaining and gaining fish markets.The social cultural study established the extent to which social cutural practices had affected the levels and the use of sanitation facilities,fish handling facilities and artisanal fish processing techniques and the factors that influenced these practices in the fishing communities of lake victoria.This information is of significance for the purpose of advocacy and mobilization of fishers in order to improve sanitation, fish handling and artisanal fishing processing situation in the fishing communities.
    Description: Lake Victoria Environmental Management Project (LVEMP)
    Description: This is LVEMP Socio-Economic Research Report, 6
    Keywords: Fisheries ; Sociology
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    NOAA/National Marine Fisheries Service | Woods Hole, MA
    In:  http://aquaticcommons.org/id/eprint/14884 | 403 | 2014-03-07 19:48:28 | 14884 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: The National Marine Fisheries Service (NMFS) Northeast Fisheries Science Center (NEFSC) Fisheries Sampling Branch (FSB) collects, maintains, and distributes data for scientific and management purposes in the northwest Atlantic Ocean. FSB manages three separate but related observer programs: the Northeast Fisheries Observer Program (NEFOP), the Industry Funded Scallop (IFS) Observer Program, and the At Sea Monitoring (ASM) Program. For the purposes of this manual, “observers” refers to any observer/monitor working for the FSB.In 2011, FSB trained and deployed over 200 observers, provided coverage on a variety of fisheries, and completed over 15,000 sea days. Observed trips are required under many of the region's fishery management plans, and for some fisheries by other federal laws and authorities such as Amendment 16 and Framework 44, Magnuson-Stevens Fishery Conservation and Management Act, Marine Mammal Protection Act, the Endangered Species Act, the and the Sustainable Fisheries Act.The purpose of this guide is to provide FSB observers, as well as end users of NEFSC Observer Program data, with a detailed description of each data field collected. In addition to this manual, the NEFSC Observer Program Biological Sampling and Catch Estimation Manual provides summaries and tables intended to enable observers to quickly determine the correct sampling protocols and methods while at sea.This manual represents a revision of the data forms, collection procedures, and protocols described in the 1996 NEFSC Observer Program Manual. For documentation of other changes see Documentation of changes made to the NEFSC Fisheries Observer Program Manual, 2013.
    Keywords: Fisheries ; Management ; Policies
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20159 | 4230 | 2016-02-25 13:27:57 | 20159 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-08
    Description: Fishing communities that have exploited the resource forgenerations constitute the main stakeholder groups in thefisheries of Lake Victoria. Several studies have examinedUganda's Lake Victoria fishing communities andcharacterised key stakeholders at community level over thelast decade (SEDAWOG 1999a and b; Geheb 1997;FeSEP 1997; Kitakule 1991).The communities are made up of scattered settlements at the shores and on islands.The categories of people living in these communities include fishers who consist primarily of large numbers of male youths who provide labour to boat and gear owners.There are resident and non-resident fish traders who after securing their supplies at the beaches, depart for their market destinations. In addition, there are fish processors,mostly operating traditional and improved smoking kilns. Many other people, dealing in provisions and supplies also stay at the beaches, their activities depending on thelevel of fish catch. The fishing communities of Lake Victoria, Uganda, include auxiliary livelihood activities such as boat building, net repairing and transportation; bait supply and beachside kiosks, video halls and retail shop business. Other economic activities are brick making, charcoal burning/wood trade, farming and livestock keeping.
    Keywords: Fisheries ; Sociology
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20295 | 4230 | 2016-03-05 10:11:12 | 20295 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-09
    Description: The overall objective of the study was to develop a better understanding of how people perceived and responded to the fisheries management measures on Lake Victoria and were affected by them.
    Keywords: Fisheries ; Sociology ; Lake Victoria Fisheries Organization ; LVFO ; Implementation of a Fisheries Management Plan (IFMP)
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    Fisheries Resources Research Institute | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20304 | 4230 | 2016-03-07 15:57:47 | 20304 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-09
    Description: The Ugandan fishery, heavily influenced by the emergence of global markets, is extremely dynamic. In recent years a major export trade, principally in Nile perch fillets from Lake Victoria, has expanded markedly. The growth of this factory based processing industry has had a marked impact on the pre-existing artisanal fishery, which has become increasingly dependent on supplying the export market instead of its traditional local small-scale markets. The industrial fishery developed as a response to the liberalisation of the management of the Ugandan economy and the consequent opening up of the export markets in North America and Europe. The emergence of the export industry has resulted in the creation of a dual structure in the fisheries sector, with the Nile perch catching and processing chain operating to European standards, whilst the artisanal sub-sector still utilises traditional methods. This dual structure is a potential source of disadvantage to the artisanal fishery which has command over fewer financial assets than the export fishery.
    Description: Workshop held in Entebbe, Uganda, 21 February 2003. Annex 3
    Keywords: Fisheries ; Sociology
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    Fisheries Resources Research Institute | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20305 | 4230 | 2016-03-07 16:04:29 | 20305 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-09
    Description: The Globalisation and fish utilisation and marketing study is a collaboration between the Fisheries Resources Research Institute (FIRRI) and the Mike Dillon Associates Limited , with funding from the Department for International Development (DFID) of the Government of the United Kingdom. The study is designed to examine the impact of the development of the export fishery on the fish producers, processors, traders and consumers in the artisanal fishery in Uganda. FIRRI 's role is to collect field data relating to the livelihoods of artisanal fish producers, processors, traders and consumers. in particular data relating to income and revenue flow. The initial focus is on the eccnomic structure of fish landing sites. The purpose of this paper is to review the progress inimplementation of the project and present the interim findings for discussion.During the first quarter, namely April to June, 2002, work was carried out on Lakes Kyoga and Albert and a report produced. During the second quarter, July to September, 2002, Lake Victoria was covered. In both phases, the focus has been on the economic structure of fish landings.
    Description: Workshop held in Entebbe, Uganda, 21 February 2003. Annex 4.
    Keywords: Fisheries ; Sociology
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20297 | 4230 | 2016-03-05 10:17:13 | 20297 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-09
    Description: The purpose of the Socio-economic Baseline Survey of the Fishing Communities was to provide information on the fish landing beaches, people involved in fisheries, their livelihood activities and facilities available to them.
    Description: Implementation of a Fisheries Management Plan (IFMP) Project
    Keywords: Fisheries ; Sociology
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    National Fisheries Resources Research Institute | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20388 | 4230 | 2016-03-18 07:41:57 | 20388 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-09
    Description: The National Fisheries Resources Research Institute (NaFIRRI) on behalf of OPEP Consult Ltd undertook a baseline survey of the transition zone (basically along the shoreline) and near shore habitats of the Uganda apart of Lake Edward and Kazinga channel during December 2007 to January 2008. A major objective of the baseline survey was to generate baseline information on the aquatic ecosystem features related to the fisheries and socio-economics of the fish catch including issues raised by residents in the fish landing sites. Therefore, the baseline survey captured information on water quality, the aquatic invertebrate fauna, aspects of fish biology and ecology, the fish catch including facilities at fish landings, value in the catch and related fisheries socio-economic issues perceived by residents in the settled areas along the shores.
    Keywords: Environment ; Fisheries ; Sociology
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    National Fisheries Resources Research Institute | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20390 | 4230 | 2016-03-22 12:24:55 | 20390 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-09
    Description: A baseline survey for the project which had been conducted in 2009 had gaps that could not allow assessment of project performance in the outcome and impact indicators to be made. This study was, therefore, commissioned to reconstruct the baseline data, aligned to the impact and outcome indicators on the project logframe and results framework, against which project achievements could be assessed.The purpose and scope of the study was to reconstruct the baseline data and analysis describing the situation prior to QAFM Project inception, taking 2008 as the baseline year, which was aligned to the project logframe outcome and impact indicators; to collect data on current status to compare project outcome (and where possible impact) in improved fish handling sites in comparison with the baseline as well as with comparable non-improved fish landing sites as control group.The study was conducted through secondary data search from sources at NaFIRRI, DFR and ICEIDA. Field data collection was carried out using a sample survey covering 312 respondents including boat and gear owners, crew members, processors and traders at eight project and two control landing sites. Key Informant Interviews were conducted with DFOs and BMU leaders in the study districts and landing sites respectively.
    Description: Icelandic International Development Agency (ICEIDA)
    Description: Quality Assurance for Fish Marketing Project (QAFMP)
    Keywords: Fisheries ; Sociology
    Repository Name: AquaDocs
    Type: monograph
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    Fisheries Resources Research Institute | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20647 | 4230 | 2016-05-19 09:11:10 | 20647 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-11
    Description: Fisheries are very important to Uganda's economy. The sector provides a vital source of food, recreation, trade and socioeconomic well being for the people and community globally. The fisheries of small lakes are important for producing fish for local populations who are not near the large lakes. These satellite lakes support important fisheries and other economic activities like fishing, water for domestic purposes and tourism, besides socio-cultural values. A number-of fish;-species, some of which were found only in Lake Victoria have been depleted through over-exploitation, introduction of exotics especiaily Nile perch and environmental degradation. Some of these fishes have been observed to survive in satellite lakes in the Victoria and Kyoga Lake basins. The Nabugabo satellite lakes (Manywa, Kayugi and Kayanja) contain endemic Cichlid fish species acting as reservoirs and therefore very important for conservation of fish biodiversity.Despite the socio-economic importance and uniqueness of these satellite lakes little research on socio-economic studies has been carried out. The sustainability of the lake is being threatened by increasing human activities. The fish stocks and species diversity are declining and this poses a threat to the livelihood of the people who depend on fish for food and income. Arising from this need a study was carried out to establish the socio-economic aspects of Nabugabo fisheries and implications for management, on which basis resource users would be made aware of the impacts of their activities. It was hoped that this would go further to ensure wise use and management of the resources by the users. The specific objectives were identifying activities around the lake, establishing socioeconomic values attached to the lake, identifying problems of the lake and resource users and examining existing local based management institutions.Results show that the activities taking place around the lakes include fishing, farming, watering of animals, deforestation and charcoal burning, brick making, resort beach development and food and refreshment. The major problem facing the lake was found to be encroachment of Hippo grass (Vossia) on the lake, which is decreasing the size of the lake, and limiting open waters for fishing (this only applied to Lake Nabugabo). Other important problems include use of illegal fishing methods, declining fish stocks and loss of cultural identity. The resource users are most pressed by the low incomes resulting from poor fish catches, theft of gears and lack of market. On examining the resource base for the lakes, it was only Lake Nabugabo that had a Landing Management Committee. The other three lakes did not have leadership institutions in place except the local councils for the respective villages. This was probably due to observed limited fisheries activities. Majority of the respondents agreed that Government and other service providers should work jointly to supplement local beach management committees in the management of the lakes resources. This is a good gesture because with increase in fishing effort and rampant use of illegal fishing methods, there is need to strengthen management institutions present on the lake. This would require Government, local community and other service providers to work together in a participatory way to control environment-degrading activities and stop the use of illegal fishing methods. Burning of vegetation on the lake should be stoppedsince it enhances growth of this grass. Finally, traditional taboos; which are present on some of the Nabugabo lakes, should be enhanced, as away ofpreserving them.
    Description: On title page: Draft 2
    Keywords: Fisheries ; Sociology
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20694 | 4230 | 2016-05-31 09:14:26 | 20694 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-12
    Description: A baseline survey of the fishing communities wasconducted in 2005/06 as one of the main studies underthe Socio-economic Research and Monitoring WorkingGroup on Lake Victoria. The overall objective of thesurvey was to provide a deeper understanding of thebroad socio-economic characteristics and well being ofthe different stakeholder groups immediately dependenton the Lake Victoria fisheries. An understanding of socioeconomic status of the fishery primary stakeholders, who include fishers, artisanal processors and traders, isessential for any subsequent periodic evaluation ofdevelopment. During the survey, a total of 1,235respondents were interviewed, at 34 landing sites in allthe Ugandan districts on Lake Victoria.The purpose of this fact sheet is to provide informationon the fish landing beaches, people involved in fisheries,their livelihood activities and facilities available to them.
    Keywords: Fisheries ; Sociology
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    Fisheries Research Institute | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20712 | 4230 | 2016-05-31 09:52:45 | 20712 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-12
    Description: Control and management of Uganda fishery resources has been hindered by among other factors the multispecies nature of the resource and the characteristic behaviour of the fishing communities. Fishermen have both genuine and uncompromising attitudes as to why they carry out certain fishing technologies. All fishing activities aim at maximizing the catches or profits while others may fish on a small scale for subsistence. Sensitizing the" fisherfolk on the appropriate fishing technologies, importance of awell regulated fishery exploitation and their participation in control and management of the resource would enhance or lead to increased and sustainable fish production. Socio-economics of fishing technologies were therefore examined using prepared questionnaires and reasons why the fishing communities behave the way they do established.
    Keywords: Fisheries ; Sociology
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    Fisheries Research Institute | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20733 | 4230 | 2016-06-09 19:06:57 | 20733 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-12
    Description: Control and management of Uganda fishery resources has been hindered by among other factors the multispecies nature of the resource and the characteristic behaviour of the fishing communities. Fishermen have both genuine and uncompromising attitudes as to why they carry out certain fishing technologies. All fishing activities aim at maximizing the catches or profits while others may fish on a small scale for subsistence. Sensitizing the" fisherfolk on the appropriate fishing technologies. importance of awell regulated fishery exploitation and their participation in control and management of the resource would enhance or lead to increased and sustainable fish production. Socio-economics of fishing technologies were therefore examined using prepared questionnaires and reasons why the fishing communities behave the way they do established.
    Keywords: Fisheries ; Sociology
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    Fisheries Resources Research Institute | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20765 | 4230 | 2016-06-12 15:24:21 | 20765 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-12
    Description: The fisheries resources of Kyoga basin lakes are of greater socio-Economic significance for the poor rural communities of this area. The lake's fisheries provide the much needed animal protein as well as source of income for the fishers and the rural poor communities. Nationally, Kyoga basin lakes fisheries are economically important in that they contribute 27% of the total national fish production. In addition, more than 15 riparian districts depend on it for food and income. Moreover, fish from lakes Kyoga and Kwania playa major role in the regional export commodity trade earning the country foreign exchange. The perception that heavy exploitation of inland fishery resources threatens a loss of socio-economic benefits to local communities and their governments has prompted the new ways of management.
    Description: ACP - EU Fisheries and Biodiversity Project
    Description: Proceedings of a Training Workshop, 12th - 16th June 2001, Jinja, Uganda
    Keywords: Fisheries ; Sociology
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    Fisheries Resources Research Institute | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20766 | 4230 | 2016-06-12 15:27:07 | 20766 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-12
    Description: The current situation is that, by any measure, most fisheries worldwide are fully over exploited. This is also true of the Uganda's fisheries where the effort needed to catch fish has increased, and the average size of fish and of stocks have both declined. A productive fisheries offers many benefits: food for local consumption; raw materials for industry; employment that generates income, which in turn encourages other industrial, commercial and service activities; export markets that can be identified and met to generate hard currency, The national economy also benefits from import substitution and·opportunities for increased taxation. But for fisheries to be productive it is not enough to produce, products must be marketed. Fishers have to learn the lesson that it is no longer enough to expect production to drive the market; success will come from producing what the market demands. It is hoped that co-management can play a big role in harnessing the various energies for sustainable development and management of the fisheries resources.
    Description: ACP - EU Fisheries and Biodiversity Project
    Description: Proceedings of a Training Workshop, 12th - 16th June 2001, Jinja, Uganda
    Keywords: Fisheries ; Sociology
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    National Fisheries Resources Research Institute | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20798 | 4230 | 2016-06-17 07:28:57 | 20798 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-12
    Description: The poster explains how to make value additions to mollusc shells for income generation among the fishing communities of Lake Victoria, Uganda
    Keywords: Fisheries ; Sociology
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    Type: monograph
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20821 | 4230 | 2016-06-18 09:58:45 | 20821 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-12
    Description: Over the period 2008 to 2010, NaFIRRI carried out a number of socio-economic studies on the Kyoga lakes to provide an update of the socio-economic conditions of the fisheries and also to address specific areas of fisheries socio-economic issues and development concerns. The data collection was conducted using Key informant interviews, questionnaire sample surveys, Focus Group Discussions, secondary data searches and field observations. The objective of this fact sheet is, therefore, to provide key information from these studies for use at national, district, community levels as well as by other interested stakeholders.
    Keywords: Fisheries ; Sociology
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20164 | 4230 | 2016-02-25 15:17:22 | 20164 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-08
    Description: We examined socio-economic variables that contribute to malnutrition in selected communities in the Lake Victoria basin during 2001. The study was carried out innine districts and hinterland communities up to 25 km awayfrom the beach were used as the reference population. The main variables examined were: feeding habits, income and intra-household food distribution and living standards. Others included disease and health, sanitation and hygiene, childcare and mothers' age and workload, weaning practices, agricultural production and food availability, careduring pregnancy and food taboos.
    Keywords: Fisheries ; Sociology
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    Format: 273-278
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    Fisheries Resources Research Institute | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20308 | 4230 | 2020-10-11 21:52:01 | 20308 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-09
    Description: There are concerns, at least among the proponents of development, on how to link policy development processes in Uganda and the associated transformation of the poor to high standards of living. In fact some questions have been posed as to whether it's the absence of poverty-targeted policies that a good proportion of individuals or communities are still poor. In the fisheries sector where most of the fish dependent communities live, poverty indications are still prevalent although arguments have been put that current reforms in the sector have transformed the lives of the fish dependent communities.The 1999/2000 household survey report indicates that the poverty levels reduced to 35% of Uganda's total population from 44% in 1997. The question that arose, which still arises anyway, was to define who is actually poor. When measuring poverty one is ultimately interested in the 'standards of living' of individuals especially those, whose standards of living are inadequate. The basic element of measuring this inadequacy/adequacy, at least in Uganda, is to use the household income or consumption per adult equivalent. Studies have demonstrated that household consumption expenditure is a good approximation of household income1. Therefore, for purpose of this report, we define poor households to mean based on that that one adopted by the Ministry of Finance to mean "households whose expenditure per adult equivalent falls below the poverty line 3". Many government documents report that the poverty line is one dollar a day. Therefore someone is below the poverty line if he or she lives on less than one dollar a day.In this paper, we analyse the evolution of poverty-driven policies that have been put in place by government and how these policies are shifting or are likely to shift the lives of fish dependent communities. We argue that combinations of poverty-policies are being translated into increased incomes and welfare of most individuals in the fisheries sector. The reasons for this shift, we argue, is as a result of a combination of factors all supported by non other that poverty-led government policies.
    Description: Workshop held in Entebbe, Uganda, 21 February 2003. Annex 6.
    Keywords: Fisheries ; Sociology
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    Fisheries Research Institute | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20318 | 4230 | 2016-03-08 12:36:32 | 20318 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-09
    Description: Control and management of Uganda fishery resources has beenhindered by among other factors the multispecies nature of the resource and the characteristic behaviour of the fishingcommunities. Fishermen have both genuine and uncompromisingattitudes as to why they carry out certain fishing technologies.All fishing activities aim at maximizing the catches or profits while others may fish on a small scale for subsistence.Sensitizing the fisherfolk on the appropriate fishingtechnologies, importance of a well regulated fishery exploitation and their participation in control and management of the resource would enhance or lead to increased and sustainable fish production. Socio-economics of fishing technologies were therefore examined using prepared questionnaires and reasons why the fishing communities behave the way they do established
    Keywords: Fisheries ; Sociology
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    Fisheries Resources Research Institute (FIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19499 | 4230 | 2016-03-05 18:05:19 | 19499 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-06-30
    Description: Lake Kimira is a minor lake in Bugiri district one of the riparian district of Lake Victoria. It is an important source of livelihood to people living in the neighbouring sub counties; Iwemba in the southwest, Kapyanga in the South and Buluguyi in the East. At the request made to the District Fisheries Officer of Bugiri District, this study was conducted to gather information on the Socioeconomicaspects of lake kimira fisheries after the ban on fishing with regards to fish amounts, marketing, consumption and the perception of the people about the restocking and the ban
    Keywords: Fisheries ; Sociology
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  • 52
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    NOAA/National Marine Fisheries Service | Seattle, WA
    In:  http://aquaticcommons.org/id/eprint/2477 | 403 | 2011-09-29 19:06:51 | 2477 | United States National Marine Fisheries Service
    Publication Date: 2021-07-13
    Description: Ghost shrimp and mud shrimp in the decapod infraorder Thalassinidea are ecologically important members of manybenthic intertidal and shallow subtidal infaunal communities, largely due to the sediment filtration and mixing that result from their burrowing and feeding behavior. These activities considerably modify their immediate environment and have made these cryptic animals extremely interesting to scientists in terms of their behavior, ecology, and classification.Over 20 years ago, seven species of thalassinideans were known from the South Atlantic Bight (Cape Hatteras, NC to Cape Canaveral, FL). During this study, the examinationof extensive collections from the National Museum of Natural History (NMNH), the Southeastern Regional Taxonomic Center (SERTC), and regional institutions, resultedin the identification of 14 species of thalassinideanscurrently known to occur within this region. The family Axiidae is represented by three species: Axius armatus, Calaxius jenneri, and Paraxiopsis gracilimana; the Callianassidae by six: Biffarius biformis, B. cf. fragilis, Callichirus major, Cheramus marginatus, Gilvossius setimanus, and Necallianassa berylae; the Calocarididae by two: Calocaris templemani and Acanthaxius hirsutimanus; andthe families Laomediidae, Thomassiniidae, and Upogebiidae are each represented by one: Naushonia crangonoides, Crosniera wennerae, and Upogebia affinis, respectively. Anillustrated key is presented for species level identification and supplemental notes on the ecology, distribution, and taxonomy of the species are provided.(PDF file contains 38 pages.)
    Keywords: Ecology ; Management ; Fisheries
    Repository Name: AquaDocs
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    NOAA/National Marine Fisheries Service | Seattle, WA
    In:  http://aquaticcommons.org/id/eprint/2476 | 403 | 2014-02-21 01:10:02 | 2476 | United States National Marine Fisheries Service
    Publication Date: 2021-07-13
    Description: Pelagic juvenile rockfish (Sebastes spp.) collected in surveys designed to assess juvenile salmonids and other species in the Gulf of Alaska in 1998 and 2000–2003provide an opportunity to document the occurrence of the pelagic juveniles of several species of rockfish. Often, species identification of rockfish is difficult or impossible at this stage of development (~20 to 60 mm),and few species indigenous to Alaska waters have been described. Use of mitochondrial DNA markers for rockfish species allowed unequivocal identification of ten species (S. aleutianus, S. alutus, S. borealis, S. entomelas, S.flavidus, S. melanops, S. pinniger, S. proriger, S. reedi, and S. ruberrimus) in subsamples from the collections. Other specimens were genetically assignable to groups of two or three species. Sebastes borealis, S. crameri, and S. reedi were identified using morphological data. Combining genetic and morphological data allowed successful resolution of the other species as S. emphaeus, probably S. ciliatus (although S. polyspinis cannot be totally ruled out), and S. polyspinis. Many specimens were initially morphologically indistinguishable from S. alutus, and several morphological groups included fish geneticallyidentified as S. alutus. This paper details the characteristics of these pelagic juveniles to facilitate morphological identification of these species in future collections. (PDF file contains 32 pages.)
    Keywords: Ecology ; Management ; Fisheries
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    NOAA/National Marine Fisheries Service | Seattle, WA
    In:  http://aquaticcommons.org/id/eprint/2480 | 403 | 2011-09-29 18:56:12 | 2480 | United States National Marine Fisheries Service
    Publication Date: 2021-07-13
    Description: This publication of the NOAA Professional Paper NMFS Seriesis the product of a special symposium on “Emerging Technologies for Reef Fisheries Research and Management” held during the 56th annual Gulf and Caribbean Fisheries Institute meeting in Tortola, British Virgin Islands, November 2003. The purpose of this collection is to highlight the diversity of questions and issues in reeffisheries management that are benefiting from applications of technology. Topics cover a wide variety of questions and issues from the study of individual behavior, distribution and abundance of groups and populations, and associations between habitats and fish and shellfish species.(PDF files contains 124 pages.)
    Keywords: Ecology ; Management ; Fisheries
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    NOAA/National Marine Fisheries Service | Seattle, WA
    In:  http://aquaticcommons.org/id/eprint/2524 | 403 | 2011-09-29 18:49:44 | 2524 | United States National Marine Fisheries Service
    Publication Date: 2021-06-25
    Description: This atlas presents information on fish eggs and temperature data collected from broadscale ichthyoplankton surveys conducted off the U.S. northeast coast from ]977 to1987. Distribution and abundance information is provided for 33 taxa in the form of graphs and contoured egg-density maps by month and survey. Comments are included on interannual and interseasonal trends in spawning intensity. Data on 14 additional but less numerous taxa are provided in tabular form. (PDF file contains 316 pages.)
    Keywords: Ecology ; Management ; Fisheries
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    NOAA/National Marine Fisheries Service | Seattle, WA
    In:  http://aquaticcommons.org/id/eprint/2503 | 403 | 2011-09-29 18:58:46 | 2503 | United States National Marine Fisheries Service
    Publication Date: 2021-07-13
    Description: Identification problems are common for many sharks due to a general lack of meristic characteristics that are typicallyuseful for separating species. Other than number of vertebrae and number and shape of teeth, identifications are frequently based on external features that are often shared among species. Identification problems in the field are most prevalent when live specimens are captured and releasing them with a minimum of stress is a priority (e.g., shark tagging programs). Identifications mustbe accurate and conducted quickly but this can be challenging, especially if specimens are very active or too large to be landed without physical damage. This field guide was designed primarily for use during field studies and presents a simplified method for identifying the 21 species of western North Atlantic Ocean sharks belonging to the family Carcharhinidae (carcharhinids). To assist with identifications a dichotomous key to Carcharhinidae was developed, and for the more problematic Carcharhinus species (12 species), separation sheets based on importantdistinguishing features were constructed. Descriptive text and illustrations provided in the species accounts were developed from field observations, photographs, andpublished references. (PDF file contains 36 pages.)
    Keywords: Ecology ; Management ; Fisheries
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    NOAA/National Marine Fisheries Service | Seattle, WA
    In:  http://aquaticcommons.org/id/eprint/2523 | 403 | 2011-09-29 18:49:02 | 2523 | United States National Marine Fisheries Service
    Publication Date: 2021-06-25
    Description: Information on the biology, fishery resources, explotiation patterns, management, and conservation status of two species of grouper-the Nassau grouper, Epinephelus striatus, and the jewfish, Epinephelus itajara-is compiled, reviewed, and analyzed. (PDF file contains 68 pages.)
    Keywords: Ecology ; Management ; Fisheries
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    NOAA/National Marine Fisheries Service | Seattle, WA
    In:  http://aquaticcommons.org/id/eprint/2522 | 403 | 2011-09-29 18:48:59 | 2522 | United States National Marine Fisheries Service
    Publication Date: 2021-06-25
    Description: An investigation was conducted into the deaths of more than 220 bottlenose dolphins (Tursiops truncatus) that occurred within the coastal bay ecosystem of mid-Texas between January and May 1992. The high mortality rate was unusual in that it was limited to a relatively small geographical area, occurred primarily within an inshore bay system separated from the Gulf of Mexico by barrier islands, and coincided with deaths of other taxa including birds and fish. Factors examined to determine the potential causes of the dolphin mortalities included microbial pathogens, natural biotoxins, industrial pollutants, other environmental contaminants, and direct human interactions. Emphasis was placed on nonpoint source pesticide runoff from agricultural areas, which had resulted from record rainfall that occurred during the period of increased mortality.Analytical results from sediment, water, and biota indicated that biotoxins, trace metals, and industrial chemical contamination were not likely causative factors in this mortality event. Elevated concentrations of pesticides (atrazine and aldicarb) were detected in surface water samples from bays within the region, and bay salinities were reduced to 〈10 ppt from December 1991 through April 1992 due to record rainfall and freshwater runoff exceeding any levels since 1939. Prolonged exposure to low salinity could have played a significant role in the unusual mortalities because low salinity exposure may cause disruption of the permeability barrier in dolphin skin. The lack of established toxicity data for marine mammals, particularly dermal absorption and bioaccumulation, precludes accurate toxicological interpretation of results beyond a simple comparison to terrestrial mammalian models. Results clearly indicated that significant periods of agricultural runoff and accompanying low salinities co-occurred with the unusual mortality event in Texas, but no definitive cause of the mortalities was determined. (PDF file contains 25 pages.)
    Keywords: Ecology ; Management ; Fisheries
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    NOAA/National Marine Fisheries Service | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/2234 | 403 | 2011-09-29 19:24:58 | 2234 | United States National Marine Fisheries Service
    Publication Date: 2021-07-12
    Description: The mission of the National Oceanic and Atmospheric Administration (NOAA) is to understand and predict changes in the Earth’s environment and conserve and manage coastal and marine resources to meet our nation’s economic, social and environmental needs (NOAA, 2004). In meeting its marine stewardship responsibilities, NOAA seeks to ensure the sustainable use of resources and balance competing uses of coastal and marine ecosystems, recognizing both their human and natural components (NOAA, 2004). Authorities for executing these responsibilities come from over 90 separate pieces of Federal legislation, each with unique requirements and responsibilities. Few of these laws explicitly mandate an ecosystem approach to management (EAM) or supporting science. However, resource managers, the science community, and increasingly, the public, are recognizing that significantly greater connectedness among the scientific disciplines is needed to support management and stewardship responsibilities (Browman and Stergiou, 2004; 2005). Neither NOAA nor any other science agency can meet the increasing demand for ecosystem science products addressing each of its mandates individually. Even if it was possible, doing so would not provide the integration necessary to solve the increasingly complex array of management issues. This focus on the integration of science and management responsibilities into an ecosystem view is one of the centerpieces of the U.S. Commission on Ocean Policy’s report (USCOP, 2004), and the Administration’s response to that report in the U.S. Ocean Action Plan (CEQ, 2004). (PDF contains 100 pages)
    Keywords: Management ; Environment
    Repository Name: AquaDocs
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    NOAA/National Marine Fisheries Service | Seattle, WA
    In:  http://aquaticcommons.org/id/eprint/2520 | 403 | 2011-09-29 19:00:33 | 2520 | United States National Marine Fisheries Service
    Publication Date: 2021-06-25
    Description: The status of the Gulf menhaden, Brevoortia patronus, fishery was assessed with purse-seine landings data from 1946 to 1997 and port sampling data from 1964 to 1997. These data were analyzed to determine growth rates, biological reference points for fi shing mortality from yield per recruit and maximum spawning potential analyses, spawner-recruit relationships, and maximum sustainable yield (MSY). The separable virtual population approach was used for the period 1976–97 (augmented by earlier analyses for 1964–75) to obtain point estimates of stock size, recruits to age 1, spawning stock size, and fishing mortality rates. Exploitation rates for age-1 fi sh ranged between 11% and 45%, for age-2 fi sh between 32% and 72%, and for age-3 fi sh between 32% and 76%. Biological reference points from yield per recruit (F0.1: 1.5–2.5/yr)and spawning potential ratio (F20: 1.3–1.9/yr and F30: 0.8–1.2/yr) were obtained for comparison with recent estimates of F (0.6–0.8/yr). Recent spawning stock estimates (as biomass or eggs) are above the long-term average, while recent recruits to age 1 are comparable to the long-termaverage. Parameters from Ricker-type spawner-recruit relations were estimated, although considerableunexplained variability remained. Recent survival to age-1 recruitment has generally been below that expected based on the Ricker spawner-recruit relation. Estimates of long-termMSY from PRODFIT and ASPIC estimation of production model ranged between 717,000 t and 753,000 t, respectively. Declines in landings between 1988 and 1992 raised concerns about the status of the Gulf menhaden stock. Landings have fl uctuated without trend since 1992, averaging about 571,000 t. However, Gulf menhaden are short lived and highly fecund. Thus, variation in recruitment to age 1, largely mediated by environmental conditions, infl uences fi shing success over the next two years (as age-1 and age-2 fi sh). Comparisons of recent estimates of fi shingmortality to biological reference points do not suggest overfishing. (PDF file contains 22 pages.)
    Keywords: Ecology ; Management ; Fisheries
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    NOAA/National Marine Fisheries Service
    In:  http://aquaticcommons.org/id/eprint/2678 | 403 | 2011-09-29 18:36:58 | 2678 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: Developmental stages of 22 species representing 16 genera of agonid fishes occurring in the northeastern Pacific Ocean from San Francisco Bay to the Arctic Ocean are presented. Three of these species also occur in the North Atlantic Ocean. Larval stages of nine species are described for the first time. Additional information or illustrations intended to augment original descriptions are provided for eight species. Information on five other species is provided from the literature for comparative purposes.The primary objective of this guide is to present taxonomic characters to help identify the early life history stages of agonid fishes in field collections. Meristic, morphometric, osteological, and pigmentation characters are used to identify agonid larvae. Meristic features include numbers of median-fin elements, pectoral-fin rays, dermal plates, and vertebrae. Eye diameter, body depth at the pectoral-fin origin, snout to first dorsal-fin length, and pectoral-fin length are the most useful morphological characters. Presence, absence, numbers, and/or patterns of dermal plates in lateral rows or on the ventral surfaceof the gut are also useful. Other important characters are the presence, absence, numbers, and ornamentation of larval head spines. Lastly, distinct pigmentation patterns are often diagnostic. The potential utility of larval characters in phylogenetic analysis of the family Agonidae is discussed. (PDF file contains 92 pages.)
    Keywords: Management ; Fisheries
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    NOAA/National Marine Fisheries Service
    In:  http://aquaticcommons.org/id/eprint/2683 | 403 | 2011-09-29 18:36:05 | 2683 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: The incidence of four discrete characters of individual sockeye salmon -two genetically inherited proteins (PGM-1*and PGM-2*), freshwater age at migration, and the presenceof the brain-tissue parasite Myxobolus arcticus-in weekly samples from two Alaskan fisheries (Noyes Island in 1986 and Sumner Strait in 1987) were used to infer stockcomposition of the catches based on corresponding character samples from 73 Alaskan and Canadian stocks. Estimated contributions of 13 stock groups, formed on the basis ofcharacter similarity of their members, were roughly consistent with expectations from tagging experiments, knowledge of stock magnitudes, and similar assessments from scales. Imprecision of the estimated contributions by the 13 stock groups limited their practical value; but variability was much reduced for combined estimated contributions by two inclusive categories, namely stock groups whose members had either high or low brainparasiteprevalence. Noyes Island catches consisted predominantly of unparasitized fish, most of which were probably of Canadian origin. The majority of Sumner Strait catches consisted of parasitized fish, whose freshwater origins may have been in Alaska or Canada. (PDF file contains 27 pages.)
    Keywords: Management ; Fisheries
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    NOAA/National Marine Fisheries Service
    In:  http://aquaticcommons.org/id/eprint/2684 | 403 | 2011-09-29 18:36:02 | 2684 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: In 1992 and 1993, researchers from the National Marine Mammal Laboratory initiated photo-identification studies on Alaskan killer whales, Orcinus orca. Waters from KodiakIsland west to the central and eastern Aleutian Islands and southeastern Bering Sea were surveyed. A total of 289 individual whales were identified. A photographic record of the whales encountered during these surveys is presented. When photographs of the 289 individual whales were compared among various regions in Alaska (Prince William Soundand Southeast Alaska) and areas outside Alaska (British Columbia, Washington, and California), 11 matches were found. The count is conservative because the 1992 and 1993surveys were limited in geographical range, restricted to summer periods, and whales may have been missed along the survey trackline. Future research incorporating both photoidentification studies and line transect surveys will provide reliable abundance estimates of Alaskan killer whales. (PDF file contains 58 pages.)
    Keywords: Conservation ; Management ; Fisheries
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    NOAA/National Marine Fisheries Service
    In:  http://aquaticcommons.org/id/eprint/2685 | 403 | 2011-09-29 18:35:51 | 2685 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: At its june 1990 annual meeting, the Technical Subcommittee(TSC) of the Canada-U.S. Groundfish Committee recommended that scientists and managers working on sablefish, Anoplopoma fimbria, issues convene to present and discuss the results of their recent research. Thorough knowledge of the biology and population dynamics of this species is essential for its effective management, especially considering its commercial importance. TSC representatives from both countries recognized that a great deal ofactive research has been conducted on this species since the International Sablefish Symposium was held in Anchorage, Alaska, in March 1983 (Melteff, 1983). As a result of this recommendation, the International Symposium on the Biology and Management of Sablefish (ISBMS) was convened April 13-15, 1993, at the Alaska Fisheries Science Center in Seattle, Washington. (PDF file contains 286 pages.)
    Keywords: Conservation ; Management ; Fisheries
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    NOAA/National Marine Fisheries Service
    In:  http://aquaticcommons.org/id/eprint/2687 | 403 | 2020-08-23 23:57:43 | 2687 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: Over 100 molluscan species are landed in Mexico. About 30% are harvested on the Pacific coast and 70% on the Atlantic coast. Clams, scallops, and squid predominate on thePacific coast (abalone, limpets, and mussels are landed there exclusively). Conchs and oysters predominate on the Atlantic coast. In 1988, some 95,000 metric tons (t) of mollusks were landed, with a value of $33 million. Mollusks were used extensively in prehispanic Mexico as food, tools, and jewelry. Their use as food and jewelry continues. Except in the States of Baja California and Baja California Sur, where abalone, clams, and scallops provide fishermen with year-round employment, mollusk fishing is done part time. On both the Pacific and Atlantic coasts, many fishermen are nomads, harvesting mollusks wherever theyfind abundant stocks. Upon finding such beds, they build camps, begin harvesting, and continue until the mollusks become so scarce that it no longer pays to continue. They then look for productive beds in other areas and rebuild their camps. Fishermen harvest abalones, mussels, scallops, and clams by free-diving and using scuba and hooka. Landings of clams and cockles have been growing, and 22,000 t were landed in 1988. Fishermen harvest intertidal clams by hand at wading depths, finding them with their feet. In waters up to 5 m, they harvest them by free-diving. In deeper water, they use scuba and hooka. Many species ofgastropods have commercial importance on both coasts. All species with a large detachable muscle are sold as scallops. On the Pacific coast, hatchery culture of oysters prevails. Oyster culture in Atlantic coast lagoons began in the 1950's, when beds were enhanced by spreading shells as cultch for spat. (PDF file contains 228 pages.)
    Keywords: Ecology ; Management ; Fisheries
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    NOAA/National Marine Fisheries Service
    In:  http://aquaticcommons.org/id/eprint/2688 | 403 | 2011-09-29 18:35:15 | 2688 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: This three-volume monograph represents the first majorattempt in over a century to provide, on regional bases, broad surveys of the history, present condition, and future of the important shellfisheries of North and Central America and Europe. It was about 100 years ago that Ernest Ingersoll wrote extensively about several molluscan fisheries of North America (1881, 1887) and about 100 years ago that Bashford Dean wrote comprehensively about methods of oyster culture in Europe (1893). Since those were published, several reports, books, and pamphlets have been written about the biology and management of individual species or groups ofclosely related mollusk species (Galtsoff, 1964; Korringa, 1976 a, b, c; Lutz, 1980; Manzi and Castagna, 1989; Shumway, 1991). However, nothing has been written during the past century that is comparable tothe approach used by Ingersoll in describing the molluscanfisheries as they existed in his day in North America or, for that matter, in Europe. (PDF file contains 224 pages.)
    Keywords: Ecology ; Management ; Fisheries
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    In:  http://aquaticcommons.org/id/eprint/2689 | 403 | 2011-09-29 18:35:26 | 2689 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: The Alaska Fisheries Science Center (AFSC), NationalMarine Fisheries Service (NMFS), hosted an internationalworkshop, 'The Importance of Prerecruit Walleye Pollock to the Bering Sea and North Pacific Ecosystems," from 28 to 30 October 1993. This workshop was held in conjunction with the annual International North Pacific Marine Science Organization (PICES) meeting held in Seattle. Nearly 100 representatives from government agencies, universities, and the fishing industry in Canada, Japan, the People's Republic of China, Russia, and the United States took part in the workshop to review and discuss current knowledge on juvenile pollock from the postlarval period to the time they recruit to the fisheries. In addition to its importance to humans as a major commercial species, pollock also serves as a major forage species for many marine fishes, birds, and mammals in the North Pacific region.(PDF file contains 236 pages.)
    Keywords: Ecology ; Management ; Fisheries
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    In:  http://aquaticcommons.org/id/eprint/2690 | 403 | 2011-09-29 18:34:33 | 2690 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: The status of the gulf menhaden, Brevoortia patronus, fishery was assessed with purseseine landing data from 1946 to 1992 and port sampling data from 1964 to 1992. These datawere analyzed to determine growth rates, biological reference points for fishing mortality from yield per recruit and maximum spawning potential analyses, spawner-recruit relationships, and maximum sustainable yield (MSY). Virtual population approaches were used to obtain point estimates of stock size, recruits to age I, spawning stock size, and fishing mortality rates. Exploitation rates ranged between 14% and 45% for age-1 fish, between30% and 72% for age-2 fish, and between 36% and 71% for age-3 fish. Biological reference points from yield per recruit (FO. I: 0.7-0.9 yr-1) and maximum spawning potential (F20: 1.62.9 yr-l and F30: 1.0-2.1 yr-1) were obtained for comparison with recent estimates of F (0.4-0.8 yr-l). Parameters from Ricker-type spawner-recruit relations were estimated, although considerable unexplained variability remained. Estimates of long-term MSY from fits of thegeneralized production model ranged between 664,000 metric tons (t) and 897,000 t. Declines in landings since 1988 have raised concerns about the status of the gulf menhadenstock. However, gulf menhaden are short lived and highly fecund. Thus, variation in recruitment to age 1 largely mediated by environmental conditions influences fishingsuccess over the next two years (as age-1 and age-2 fish). Comparisons of recent estimates of fishing mortality to biological reference points do not suggest overfishing. (PDF file contains 26 pages.)
    Keywords: Management ; Ecology ; Fisheries
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    In:  http://aquaticcommons.org/id/eprint/2691 | 403 | 2011-09-29 18:34:42 | 2691 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: This study owes its inception to the wisdom and experienceof the staff of the Northeast Fisheries Science Center who, after several decades of surveys in the New York Bight, recognized a unique opportunity to capitalize on the decision to stop ocean dumping of sewage sludge and designed an innovative field study to evaluate effects on living marine resources and their habitats. For decades ocean dumping was viewed as a cheap and effective means for disposal of wastes generated by urbanized coastal areas. Even after the 12-mile site was closed, sewage sludge continued to be dumped at Deepwater Dumpsite 106. The 6-milesite off the NewJersey coast is still used as a dumpsitefor dredged material from New York Harbor areas. Discussions continue on the propriety of using thedeep ocean spaces for disposal of a variety of materialincluding low level radioactive wastes. Consequently,managers are still faced with critical decisions in this area. It is to be hoped that the results from the 12-mile study will provide the necessary information on which these managers can evaluate future risks associated with ocean waste disposal. (PDF file contains 270 pages.)
    Keywords: Ecology ; Management ; Pollution
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    In:  http://aquaticcommons.org/id/eprint/2693 | 403 | 2011-09-29 18:34:08 | 2693 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: Summer flounder, Paralichthys dentatus, scup, Stenotomus chrysops, and black sea bass, Centropristis striata, cooccur within the Middle Atlantic Bight and off southern New England and are important components of commercial and recreational fisheries. The commercial otter trawl fishery for these species is primarily a winter fishery, whereas the recreational fishery takes place between late spring and autumn. The otter trawl fishery generally targetssummer flounder, and less frequently scup, while black sea bass occurs as bycatch. Trips in which all three species were present yielded highest aggregate landings per unit of effort (LPUE) levels and occurred more often than trips landing only one or two species. More than 50% of the trips in the trawl fishery landed at least two of the three species. In contrast, greater than 75% of the recreational landings of each species occurred as a result of tripslanding only one species. Differences in the fisheries resulted from the interactions of seasonal changes in species distributions and gear selectivity. (PDF file contains 18 pages.)
    Keywords: Management ; Fisheries
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    In:  http://aquaticcommons.org/id/eprint/2692 | 403 | 2011-09-29 18:34:30 | 2692 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: EXECUTIVE SUMMARY: The Coastal Change Analysis Programl (C-CAP) is developinga nationally standardized database on landcover and habitat change in the coastal regions of the United States. C-CAP is part of the Estuarine Habitat Program (EHP) of NOAA's Coastal Ocean Program (COP). C-CAP inventories coastal submersed habitats, wetland habitats, and adjacent uplands and monitors changes in these habitats on a one- to five-year cycle. This type of information and frequency of detection are required to improve scientific understanding of the linkages of coastal and submersed wetland habitats with adjacent uplands and with the distribution, abundance,and health of living marine resources. The monitoringcycle will vary according to the rate and magnitude ofchange in each geographic region. Satellite imagery(primarily Landsat Thematic Mapper), aerial photography,and field data are interpreted, classified, analyzed,and integrated with other digital data in a geographicinformation system (GIS). The resulting landcoverchange databases are disseminated in digital formfor use by anyone wishing to conduct geographic analysisin the completed regions. C-CAP spatial information on coastal change will be input to EHP conceptual and predictive models to support coastal resource policy planning and analysis. CCAP products will include 1) spatially registered digital databases and images, 2) tabular summaries by state, county, and hydrologic unit, and 3) documentation. Aggregations to larger areas (representing habitats, wildlife refuges, or management districts) will be provided on a case-by-case basis. Ongoing C-CAP research will continue to explore techniques for remote determination of biomass, productivity, and functional status of wetlands and will evaluate new technologies (e.g. remote sensor systems, global positioning systems, image processing algorithms) as they become available. Selected hardcopy land-cover change maps will be produced at local (1:24,000) to regional scales (1:500,000) for distribution. Digital land-cover change data will be provided to users for the cost of reproduction.Much of the guidance contained in this document was developed through a series of professional workshopsand interagency meetings that focused on a) coastal wetlands and uplands; b) coastal submersed habitat including aquatic beds; c) user needs; d) regionalissues; e) classification schemes; f) change detectiontechniques; and g) data quality. Invited participantsincluded technical and regional experts and representativesof key State and Federal organizations. Coastal habitat managers and researchers were given an opportunity for review and comment. This document summarizes C-CAP protocols and procedures that are to be used by scientists throughout the United States to develop consistent and reliable coastal change information for input to the C-CAP nationwide database. It also provides useful guidelines for contributors working on related projects. It is considered a working document subject to periodic review and revision.(PDF file contains 104 pages.)
    Keywords: Ecology ; Management ; Environment
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    In:  http://aquaticcommons.org/id/eprint/2696 | 403 | 2011-09-29 18:34:00 | 2696 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: Current information is reviewed that provides clues to the intraspecific structure of dolphin species incidently killed in the yellowfin tuna purse-seine fishery of the eastern tropical Pacific (ETP). Current law requires that management efforts are focused on the intraspecific level, attempting to preserve local and presumably locally adapted populations. Four species are reviewed: pantropical spotted, Stenella attenuata; spinner, S. longirostTis;striped, S. coeruleoalba; and common, Delphinus delphis, dolphins. For each species, distributional, demographic, phenotypic, and genotypic data are summarized, and theputative stocks are categorized based on four hierarchal phylogeographic criteria relative to their probability of being evolutionarily significant units. For spotted dolphins, the morphological similarity of animals from the south and the west argues that stock designations (and boundaries) be changed from the current northernoffshore and southern offshore to northeastern offshore and a combined western and southern offshore. For the striped dolphin, we find little reason to continue the presentdivision into geographical stocks. For common dolphins, we reiterate an earlier recommendation that the long-beaked form (Baja neritic) and the northern short-beaked form bemanaged separately; recent morphological and genetic work provides evidence that they are probably separate species. Finally, we note that the stock structure of ETP spinnerdolphins is complex, with the whitebelly form exhibiting characteristics of a hybrid swarm between the eastern and pantropical subspecies. There is little morphological basis at present for division of the whitebelly spinner dolphin into northern and southern stocks. However, we recommend continued separate management of the pooled whitebelly forms, despite their hybrid/intergrade status. Steps should be taken to ensure that management practices do not reduce the abundance of eastern relative to whitebelly spinner dolphins. To do so may lead to increased invasion of the eastern's stock range and possible replacement of the eastern spinner dolphin genome.(PDF file contains 24 pages.)
    Keywords: Conservation ; Management ; Fisheries ; pantropical spotted ; Stenella attenuata ; spinner ; Stenella longirostTis ; striped ; Stenella coeruleoalba ; and common ; Delphinus delphis ; dolphins
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    In:  http://aquaticcommons.org/id/eprint/2704 | 403 | 2011-09-29 18:30:13 | 2704 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: The United States and Japanese counterpart panels on aquaculture were formed in 1969 under the United States-Japan Cooperative Program in Natural Resources (UJNR). The panels currently include specialists drawn from the federal departments most concerned with aquaculture. Chargedwith exploring and developing bilateral cooperation, the panels have focused their efforts on exchanginginformation related to aquaculture which could be of benefit to both countries.The UJNR was begun during the Third Cabinet-Level Meeting of the Joint United States-Japan Committee on Trade and Economic Affairs in January 1964, In addition to aquaculture, current subjects in the program include desalination of seawater, toxic microorganisms, air pollution, energy, forage crops, national park management, mycoplasmosis, wind and seismic effects, protein resources,forestry, and several joint panels and committees in marine resources research, development, and utilization.Accomplishments include increased communication and cooperation among technical specialists; exchanges of information, data, and research findings; annual meetings of the panels, a policy-coordinative body; administrative staff meetings; exchanges of equipment, materials, and samples; several major technical conferences; and beneficial effects on international relations. (PDF file contains 150 pages.)
    Keywords: Management ; Fisheries ; Aquaculture
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    In:  http://aquaticcommons.org/id/eprint/2697 | 403 | 2011-09-29 18:34:04 | 2697 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: This guide was developed to assist with the identification of western North Atlantic grouper species of the genera Alphestes, Cephalopholis, Dermatolepis, Epinephelus,Gonioplectrus, Mycteroperca, and Paranthias. The primary purpose for assembling the guide is for use with projects that deploy underwater video camera systems. The mostvital source of information used to develop the guide was an archive of underwater video footage recorded during fishery projects. These video tapes contain 348 hours ofsurvey activity and are maintained at the National Marine Fisheries Service (NMFS), Pascagoula, Mississippi. This footage spans several years (1980-92) and was recordedunder a wide variety of conditions depicting diverse habitats from areas of the western North Atlantic Ocean, Caribbean Sea, and Gulf of Mexico. Published references wereused as sources of information for those species not recorded on video footage during NMFS projects. These references were also used to augment information collected from video footage to provide broader and more complete descriptions. The pictorial guide presents information for all 25 grouper species reported to occur in the western North Atlantic. Species accounts provide descriptive text and illustrations depicting documented phases for the various groupers. In addition, species separation sheets based on important identification features were constructed to further assist with species identification. A meristic table provides information for specimens captured in conjunction with videoassisted fishery surveys. A computerized version enables guide users to amend, revise,update, or customize the guide as new observations and information become available. (PDF file contains 52 pages.)
    Keywords: Ecology ; Management ; Fisheries
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    In:  http://aquaticcommons.org/id/eprint/2723 | 403 | 2011-09-29 18:32:42 | 2723 | United States National Marine Fisheries Service
    Publication Date: 2021-06-26
    Description: The United States and Japanese counterpart panels on aquaculture were formed in 1969 under the United States-Japan Cooperative Program in Natural Resources (UJNR). The panels currently include specialists drawn from the federal departments most concerned with aquaculture. Charged with exploring and developing bilateral cooperation, the panels have focused their efforts on exchanging information related to aquaculture which could be of benefitto both countries.The UJNR was begun during the Third Cabinet-Level Meeting of the Joint United States-Japan Committee on Trade and Economic Affairs in January 1964. In addition to aquaculture, current subjects in the program include desalination of seawater, toxic microorganisms, air pollution, energy, forage crops, national park management, mycoplasmosis, wind and seismic effects, protein resources, forestry, and several joint panels and committees in marineresources research, development, and utilization.Accomplishments include: Increased communication and cooperation among technical specialists; exchanges of information, data, and research findings; annual meetings of the panels, a policy-coordinative body; administrative staff meetings; exchanges of equipment, materials, and samples; several major technical conferences; and beneficial effects on international relations. (PDF file contains 88 pages.)
    Keywords: Management ; Fisheries ; Aquaculture
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    In:  http://aquaticcommons.org/id/eprint/2722 | 403 | 2011-09-29 18:32:32 | 2722 | United States National Marine Fisheries Service
    Publication Date: 2021-06-26
    Description: This report is a summary of the results of 883 purse seine sets made for juvenile salmonids during 15 cruises off the coasts of Oregon and Washington during the springs and summers of 1981-1985. Juvenile coho salmon (Oncorhynchus kisutch) occurred most frequently, followed by chinook salmon (0. tshawytscha). The juveniles of these two species co-occurred more frequently than expected. Juvenile chum, pink and sockeye salmon (0. keta, O. gorbuscha, and O. nerka), steelhead (0. mykiss) and cutthroat trout (0. clarki clarki) were caught much less frequently and in lower numbers than coho or chinook salmon. We found no evidence of large schools ofjuvenile salmonids. A northerly movement of juvenile coho salmon wa~ suggested by decreased catches off Oregon and increased catches off Washington between early and late summer. Highest catch per set of juvenile coho salmon was usually found inshore of 37.2 km. Juvenile chinook salmon were usually found within 27.9 km of the coast. Juvenile salmonids were found over a broadrange of surface salinities and temperatures. High catches of juvenile coho salmon occurred in both the low salinity waters of the Columbia River plume and in adjacent higher salinity waters. Preferences for specific salinities or temperatures were not obvious for any species, although catch rates of juvenile coho salmon were highest in years when chlorophyll content was also high. Based on expansions of fish with coded wire tags, we estimated that hatchery coho salmon smolts comprised 74%, on average, of the juvenile coho salmon catches. The remaining 26% were presumably wild fish or hatchery fish released as fingerlings. Hatchery coho salmon were caught roughlyin proportion to the numbers released. However, hatchery fish from the Columbia River and private coastal facilities were caught at slightly higher rates while those from coastal Washington and public coastal Oregon hatcheries were caught at slightly lower rates than expected from thenumbers released. No juvenile coho salmon with coded wire tags were caught that had originated from either California or Puget Sound hatcheries. (PDF file contains 88 pages.)
    Keywords: Ecology ; Management ; Fisheries
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    In:  http://aquaticcommons.org/id/eprint/2711 | 403 | 2011-09-29 18:30:52 | 2711 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: During 1973-88, 3,661 marine mammals of 17 species were reported as incidental catch by U.S. fishery observers aboard foreign and joint venture trawl vessels in the U.S.Exclusive Economic Zone in the North Pacific Ocean and the Bering Sea. Northern sea lions (Eumetopias jubatus) accounted for 90% of the reported incidental mortality in the Gulf of Alaska and eastern Bering Sea. Nearly half of these sea lions were taken in trawl nets in the Shelikof Strait, Alaska, joint venture fishery during 1982-84. However, high incidental mortality rates (〉25 sea lions per 10,000 metric tons of groundfish catch) also occurred in the foreign fisheries near Kodiak Island and in the Aleutian Islands area in earlier years. Estimated annual mortality of incidentally caught northern sea lions inAlaska declined from 1,000 to 2,000 animals per year during the early 1970s and 1982 to fewer than 100 animals in 1988. In the Bering Sea most sea lions incidentally caught weremales, while in the Gulf of Alaska females were more frequently caught. Females may also have been dominant in the incidental catch of sea lions in the Aleutian Islands area, but age and sex composition data are limited. Incidental mortality of adult female sea lions by foreign trawl fisheries in these areas could have partially contributed to the reported declines in northern sea lion populations in Alaska during the 1970s, but it cannot aloneaccount for the present decline in population size. (PDF file contains 64 pages.)
    Keywords: Management ; Fisheries
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    In:  http://aquaticcommons.org/id/eprint/2734 | 403 | 2011-09-29 18:33:23 | 2734 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: The authors investigated various life history aspects of 19rockfish species (Sebastes chlorostictus, S. constellatus, S. dalli, S. elongatus, S. ensifer, S. entomelas, S. flavidus, S. goodei, S. hopkinsi, S. levis, S. melanostomus, S. miniatus, S. ovalis, S. paucispinis, S. rosaceus, S. rosenblatti, S. rufus, s. saxicola, S. semicinctus) from the southern California Bight. These aspects included depth distribution, age-length relationships (of 7 species), length-weight relationships, size at first maturity, spawning season, and fecundity. Growth rates of female S. elongatus, S. hopkinsi, S. ova/is, S. saxicola, and S. semicinctus were higherthan male conspecifics. Multiple spawning per season was found in 12 species. Generally, most species spawned between late winter and early summer, though there was some spawning within the genus throughout the year. Spawning season duration ranged from 2 (S. flavidus) to 10 months (S. paucispinis). Spawning seasons tended to start earlier in the year and be of longer duration in the southern California Bight, compared to published data on central California conspecifics. Males matured at a smaller length in 7 of the 17 species studied. Maximum fecundities ranged from 18,000 (S. dalll) to about 2,680,000 (S. levis). (PDF file contains 44 pages.)
    Keywords: Ecology ; Management ; Fisheries
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    In:  http://aquaticcommons.org/id/eprint/2732 | 403 | 2011-09-29 18:33:16 | 2732 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: We present data on ichthyoplankton distribution, abundance,and seasonality and supporting environmental information forfour species of coastal pelagics from the family Carangidae: blue runner Caranx crysos, Atlantic bumper Chloroscombrus chrysurus, round scad Decapterus punctatus, and rough scad Trachurus lathami. Data are from 1982 and 1983 cruises off Louisiana sponsored by the Southeastern Area Monitoring and Assessment Program (SEAMAP). Bioprofiles on reproductive biology, early life history, meristics, adult distribution, and fisheries characteristics are also presented for these species.Maximum abundances of larval blue runner, Atlantic bumper, and round scad were found in July inside the 4O-m isobath, although during the rest of the cruises these species wererarely found together. Larval Atlantic bumper were capturedin June and July only; blue runner in May, June, and July; and round scad in all seasons. Atlantic bumper larvae, concentrated mostly off western Louisiana, were by far the most abundant carangid in 1982 and 1983. Larval blue runner were the second most abundant summer-spawned carangid in 1982 and 1983, but their abundance and depth distribution varied considerably between years. Relative abundance of larval round scad off Louisiana was low, and they were captured only west of the Mississippi River delta, although they are reported to dominate carangid populations in the eastern Gulf of Mexico. Rough scad were primarily winter/spring and outer-shelf (40-182 m) spawners. They ranked third in overall abundance, but were the most abundant target carangid on the outer shelf. Ecologicalparameters such as surface salinity, temperature, and station depth are presented from capture sites for recently hatched larvae 〈2.5 mm notochord length, except round scad) as well as for all sizes of fish below 14 mm standard length. (PDF file contains 44 pages.)
    Keywords: Ecology ; Management ; Fisheries
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    In:  http://aquaticcommons.org/id/eprint/2735 | 403 | 2011-09-29 18:33:26 | 2735 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: Information on long-term temporal variability of and trends in benthic community-structure variables, such as biomass, is needed to estimate the range of normal variability in comparison with the effects of environmental change or disturbance. Fishery resource distribution and population growth will be influenced by such variability. This study examines benthic macrofaunal biomass and related data collected annually between 1978 and 1985 at 27 sites on the continental shelf of the northwestern Atlantic, from North Carolina to the southern Gulf of Maine. The study was expanded at several sites with data from other studies collected at the same sites prior to 1978. Results indicatethat although there was interannual and seasonal variability, as expected, biomass levels over the study period showed few clear trends. Sites exhibiting trends were either in pollution-stressed coastal areas or influenced by the population dynamics of one or a few species, especially echinoderms. (PDF file contains 34 pages.)
    Keywords: Ecology ; Management ; Fisheries
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    In:  http://aquaticcommons.org/id/eprint/2737 | 403 | 2011-09-29 18:33:34 | 2737 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: The estuarine populations of juvenile Atlantic and gulf menhaden (Brevoortia tyrannus and B. patronus) were sampledduring two-boat, surface-trawl, abundance surveys extensively conducted in the 1970s. Juvenile Atlantic menhaden were sampled in 39 estuarine streams along the U.S. Atlantic coast from northern Florida into Massachusetts. Juvenile gulf menhaden were sampled in 29 estuarine streams along the Gulf of Mexico from southeast Texas into western Florida. A stratified, two-stage, cluster sampling design was used. Annual estimates of relative juvenile abundance for each species ofmenhaden were obtained from catch-effort data from thesurveys. There were no significant correlations, for eitherspecies, between the relative juvenile abundance estimates and fishery-dependent estimates of year-class strength. From 1972 to 1975, the relative abundance of juvenile Atlantic menhaden in north Atlantic estuaries decreased to near zero. (PDF file contains 22 pages.)
    Keywords: Management ; Fisheries ; Brevoortia tyrannus ; Brevoortia patronus ; Atlantic menhaden ; Gulf menhaden
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    In:  http://aquaticcommons.org/id/eprint/2738 | 403 | 2011-09-29 18:22:55 | 2738 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: Cephalopod remains (beaks, bodies, and parts of bodies) werecollected from the stomachs of 157 sperm whales (Physetermacrocephalus) taken off central California (lat. 37°-39°N). At least 24 species representing 14 families were identified. Frequencies of occurrence of the six most numerous taxa were Moroteuthis robusta 72.0%, Gonatopsis borealis 66.2%, Histioteuthis dofleini 36.9%, Galiteuthis spp. (including G. phyllura and G. pacifica) 36.3%, Octopoteuthis deletron 35.0%, and Vampyroteuthisinfernalis 27.4%. One find of two Mesonychoteuthishamiltoni beaks strongly suggests transequatorial migration by one large male sperm whale. (PDF file contains 18 pages.)
    Keywords: Management ; Fisheries
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    In:  http://aquaticcommons.org/id/eprint/2736 | 403 | 2011-09-29 18:33:32 | 2736 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: The United States and Japanese counterpart panels on aquaculture were formed in 1969 under the United States-Japan Cooperative Program in Natural Resources (UJNR). Thepanels currently include specialists drawn from the federal departments most concerned with aquaculture. Charged with exploring and developing bilateral cooperation, the panelshave focused their efforts on exchanging information related to aquaculture which could be of benefit to both countries.The UJNR was begun during the Third Cabinet-Level Meeting of the Joint United States-Japan Committee on Trade and Economic Affairs in January 1964. In addition to aquaculture, current subjects in the program include desalination of seawater, toxic microorganisms, air pollution, energy, forage crops, national park management, mycoplasmosis, wind and seismic effects, protein resources, forestry, and several joint panels and committees in marine resources research, development, and utilization.Accomplishments include: Increased communication and cooperation among technical specialists; exchanges of information, data, and research findings; annual meetings of the panels, a policy-coordinative body; administrative staff meetings; exchanges of equipment, materials, and samples; several major technical conferences; and beneficial effects on international relations. (PDF file contains 134 pages.)
    Keywords: Ecology ; Management ; Fisheries
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    In:  http://aquaticcommons.org/id/eprint/2733 | 403 | 2011-09-29 18:33:19 | 2733 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: We present data on ichthyoplankton distribution, abundance,and seasonality and supporting environmental information forfour species of coastal pelagics from the family Clupeidae: round herring Etrumeus teres, scaled sardine Harengula jaguana, Atlantic thread herring Opisthonema oglinum, and Spanish sardine Sardinella aurita. Data are from 1982 and 1983 cruises across the northern Gulf of Mexico sponsored by the Southeastern Area Monitoring and Assessment Program (SEAMAP). This is the first such examination for these species on a multiyear and gulfwide scale. Bioproflles on reproductive biology, early life history, meristics, adult distribution, and fisheries characteristics are also presented for these species.During the summer, larval Atlantic thread herring and scaledand Spanish sardines were abundant on the inner shelf 〈40 mdepth), but were rare or absent in deeper waters. Scaled sardine and thread herring were found virtually everywhere inner-shelf waters were sampled, but Spanish sardines were rare in the north-central Gulf. During 1982, larval Atlantic thread herring were the most abundant of the four target c1upeid species, whereas Spanish sardine were the most abundant during 1983. On the west Florida shelf, Spanish sardine dominated larval c1upeid populations both years. Scaled sardine larvae were the least abundant of the four species both years, but were still captured in 25% of inner-shelf bongo net collections. Round herring larvae, collected February-early June (primarily March-April), were abundant on the outer shelf (40-182 m depth) and especially off Louisiana. Over the 2-year period, outer-shelf mean abundance for round herring was 40.2 larvae/10 m2; inner-shelf mean abundances for scaled sardine, Atlantic thread herring, and Spanish sardine were 14.9, 39.2, and 41.9 larvae/l0 m2, respectively. (PDF file contains 66 pages.)
    Keywords: Ecology ; Management ; Fisheries
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    In:  http://aquaticcommons.org/id/eprint/2744 | 403 | 2011-09-29 18:24:00 | 2744 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: A pictorial key to US genera of free-living marine nematodesin the order Enoplida is presented. Specific morphological and anatomical features are iUustrated to facilitate use of the key. The purpose of this work is to provide a single key to the genera of enoplid nematodes to facilitate identification of these organisms by nematologists and marine biologists working with meiofauna. (PDF file contains 32 pages.)
    Keywords: Management ; Fisheries ; Biology
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    NOAA/National Marine Fisheries Service
    In:  http://aquaticcommons.org/id/eprint/2742 | 403 | 2011-09-29 18:23:45 | 2742 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: Ichthyofauna of the coastal «10 m depth) habitat of the South Atlantic Bight were investigated between Cape Fear, North Carolina, and the St. John's River, Florida. Trawl collections from four nonconsecutive seasons in the period July 1980 to December 1982 indicated that the fish community is dominated by the family Sciaenidae, particularly juvenile forms. Spot (Leiostomus xanthurus) and Atlantic croaker (Micropogonias undulatus) were the two most abundant species and dominated catches during all seasons. Atlantic menhaden (Brevoortin tyrannus) was also very abundant, but only seasonally (winter and spring) dominant in the catches. Elasmobranch fIShes, especiallyrajiforms and carcharinids, contributed to much of the biomass of fishes collected. Total fish abundance was greatest in winter and lowest in summer and was influenced by the seasonality of Atlantic menhaden and Atlantic croaker in the catches. Biomass was highest in spring and lowest in summer, and was influenced by biomass of spot. Fish density ranged from 321 individuals and 12.2 kg per hectare to 746 individuals and 25.2 kg per hectare. Most species ranged widely throughout the bight, and showed some evidence of seasonal migration. Species assemblages were dominated by ubiquitous year-round residents of the coastal waters of the bight. Diversity (H') was highest in summer, and appeared influenced by the evenness of distributionof individuals among species. (PDF file contains 56 pages.)
    Keywords: Ecology ; Management ; Fisheries ; Biology
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    NOAA/National Marine Fisheries Service
    In:  http://aquaticcommons.org/id/eprint/2746 | 403 | 2011-09-29 18:24:04 | 2746 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: Codend selection of winter flounder (Pseudopleuronectes americanus) in 76-127 mm mesh codends was examined from experiments conducted in Long Island Sound during the spring of 1986-87. The results show a slightly larger size at selection than was found in earlier work as indicated by the selection factor, 2.31 in the present study compared with 2.2 and 2.24 from previous studies. Diamond mesh was found to have a length at 50% retention about 1 cm longer (Lso =22.6 cm), and a selection range (3.4 cm) about 1 cm narrower, than square mesh in 102-mm codends. Tow duration varied from 1 to 2 hours using 114-mm diamond mesh. As has been found in previous studies, tow duration and Lso are positively related, with I-hour tows averaging 24.6 cm and 2-hour tows averaging 26.6 cm. The importance of the slope of the selection curve was examined in yield-per-recruit analyses by comparing knife-edge and stepwise recruitment. In all mesh sizes, stepwise recruitment provides a more conservative estimate of yield in the presence of a minimum size limit. Differences in yield estimates between the two models were generally small (1-7%), except in the largestmesh size, 127 mm, where yield is overestimated by 10% whenassuming knife-edge recruitment. (PDF file contains 16 pages.)
    Keywords: Ecology ; Management ; Fisheries
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    NOAA/National Marine Fisheries Service
    In:  http://aquaticcommons.org/id/eprint/2740 | 403 | 2011-09-29 18:23:21 | 2740 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: Acomprehensive description of the Massachusetts coastal lobster (Homarus americanus) resou,rce was obtained by sampling commercial catches coastwide at sea and at dealerships between 1981 and 1986. Acommercial lobster sea-sampling program, wherein six coastal regions were sampled monthly, with an areal and temporal data weighting design, was the primary source of data.An improved index of catch per trap haul/set-over-day wasgenerated by modeling the relationship between catch and immersion time and standardizing effort. This 6-year time-series of mean annual catch rates tracked closely the landings trend for territorial waters.During the study period there was a gradual increase in indices of exploitation and total annual mortality which corresponded to a gradual decline in mean carapace length of marketable lobster. The frequency of culls escalated from 10.0% in 1981 to 20.9% in 1986, while the percentage of lobster found dead in traps was consistently less than 1%. The sex ratio (%F:%M) was significantly different from 50:50 and approximated a 60:40 relationship during the study period.Male and female weight-length relationships were significantly different. Females weighed more than males at smaller sizes and less than males at larger sizes. A north-south clinal trend was evident wherein lobster north of Cape Cod weighed less at length than those from regions south of Cape Cod.Functional size-maturity relationships were developed forfemale lobster by staging cement gland development. Proportions mature at size represent more realistic values than those obtained by analyses of percent of females ovigerous.Regional variation occurred in most of the parameters studied. Three lobster groups, differing in major population descriptors, are defined by our data.(PDF file contains 28 pages.)
    Keywords: Ecology ; Management ; Fisheries ; Biology
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    NOAA/National Marine Fisheries Service
    In:  http://aquaticcommons.org/id/eprint/2739 | 403 | 2011-09-29 18:23:19 | 2739 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: Information on the biology and fisheries of cobia, Rachycentron canadum, is compiled and reviewed in the FAD species synopsis style. Topics include taxonomy, morphology, distribution, reproduction, pre-adult and adult stages, food, growth, migration, population characteristics, and various aspects of exploitation.Data and information were obtained from unpublished aswell as published sources.Cobia, the only species in the family Rachycentridae, is amigratory pelagic fish that occurs in tropical and subtropical seas of the world, except in the central and eastern Pacific Ocean. In the western Atlantic Ocean, spawning occurs during the warm months. Eggs and larvae are planktonic. Females grow faster than males: at 1 year, females are 36 cm FL and 0.4 kg; at 4 years, 99 cm and 11 kg; and at 8 years, 137 cm and 31 kg. Comparable data for males are: at 1 year, 31 cm and 0.3 kg; 4 years, 82 cm and 6 kg; and 8 years, 108 cm and 15 kg. Sexual maturity is attained by males at about 52 cm FL in their secondyear and by females at about 70 cm in their third year. Fecundity for females 100-125 cm FL varies from 1.9 to 5.4 million eggs. Cobia favor crustaceans for food, but will feed on other invertebrates and fishes as well. They attain a maximum size of over 60 kg. Cobia are fished both commercially and recreationally. Commercially, they are usually caught incidentally in both hook-and-Iine and net fISheries. In the United States, which ranks behind Pakistan, Mexico, and the Philippines in commercialproduction of cobia, recreational landings exceedcommercial landings by more than ten-fold. (PDF file contains 32 pages.)
    Keywords: Ecology ; Management ; Fisheries ; Biology
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    NOAA/National Marine Fisheries Service
    In:  http://aquaticcommons.org/id/eprint/2743 | 403 | 2011-09-29 18:23:47 | 2743 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: The objective of this study was to describe the physical andichthyological changes occurring seasonally and annually in the south San Francisco Bay, based on the results of 2,561 otter trawl and water samples obtained between February 1973 and June 1982. Temperature varied predictably among seasons in a pattern that varied little between years. Salinity also underwent predictable seasonal changes but the pattern varied substantially between years. The most abundant species of fish were northern anchovy (Engraulis mordax), English sole (Parophrys vetulus), and shiner surfperch (Cymatogaster aggregata). The majority of the common fish species were most abundant during wet years and least abundant in dry years. Numeric diversity was highest during the spring and early summer, with no detectable interannual trends. Species composition changed extensivelybetween seasons and between years, particularly yearswith extremely high or extremely low freshwater inflows. Allthe common species exhibited clustered spatial distributions. Such spatial clustering could affect the interpretation of data from estuarine sampling programs. Gobies (Family Gobiidae) were more abundant during flood tides than during ebb tides. English sole were significantly more abundant in shallower areas. Shiner surfperch showed significant differences in abundancebetween sample areas.(PDF file contains 28 pages.)
    Keywords: Ecology ; Management ; Fisheries ; San Francisco Bay ; California ; fish diversity ; seasonal
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  • 91
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    NOAA/National Marine Fisheries Service
    In:  http://aquaticcommons.org/id/eprint/2750 | 403 | 2011-09-29 18:24:34 | 2750 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: Greenland turbot (Reinhardtius hippoglossoides) is a commercially important flounder in both the North Atlantic and North Pacific Oceans. In the latter, its center of abundance is in the eastern Bering Sea and along the Aleutian Islands chain where its population is managed as a single stock. Harvest levels in this region of the North Pacific during the period 1970-81 were comparable with thosein the northwest and northeast Atlantic, with annual average catches of 53,000 metric tons (t). However, the catch in 1984 dropped sharply to 23,100 t, in partbecause of reduced quotas arising from concern over continued poor recruitment and declining catch-per-unit-effort.Recruitment failure was manifested in 1) the sharp decline in the catch rate of young flsh in annual research trawl surveys on the continental shelf of the eastern Bering Sea and 2) an increasing proportion of older and larger fish inthe commercial catch from the continental slope of both the eastern Bering Sea and Aleutian Islands. The cause ofthe decline in recruitment could not be clearly identifled.Greenland turbot of the Bering Sea-Aleutian Islands share certain distributional features with the North Atlantic form. There is an apparent bathymetric change in the size and age of fish, with younger animals occupying continentalshelf depths and the older individuals residing at depths of the continental slope. At shallow depths the young are exposed to temperature fluctuations, whereas older animals along the slope are exposed to relatively stable temperatures.A hypothesis is proposed for describing the temporal and spatial paths by which young animals reach the mature or spawning portion of the population. (PDF file contains 38 pages.)
    Keywords: Ecology ; Management ; Fisheries
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    NOAA/National Marine Fisheries Service
    In:  http://aquaticcommons.org/id/eprint/2754 | 403 | 2011-09-29 18:25:06 | 2754 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: This study is concerned with the measurement of total factor prodnctivity in the marine fishing industries in general and in the Pacific coast trawl fishery in particular. The study is divided into two parts. Part I contains suitable empirical and introductory theoretical material for the examination of productivity in thePacific coast trawl Deet. It is self-contained, and contains the basic formulae, empirical results, and discussion. Because the economic theory of index numbersand productivity is constantly evolving and is widely scattered throughout the economics literature, Part D draws together the theoretical literature into one place to allow ready access for readers interested in more details.The major methodological focus of the study is upon the type of economic index number that is most appropriate for use by economists with the National Marine Fisheries Service. This study recommends that the following types ofeconomic index numbers be used: chain rather than fIxed base; bilateral rather than multilateral; one of the class of superlative indices, such as the Tornqvist or Fisher Ideal. (PDF file contains 40 pages.)
    Keywords: Ecology ; Management ; Fisheries
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    NOAA/National Marine Fisheries Service
    In:  http://aquaticcommons.org/id/eprint/2755 | 403 | 2011-09-29 18:25:20 | 2755 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: The geographic and depth frequency distribution of 124 common demersal fish species in the northeastern Pacific were plotted from data on me at the Northwest and Alaska Fisheries Center (NWAFC), National Marine Fisheries Service. The data included catch records of fishes and invertebrates from 24,881 samples taken from the Chukchi Sea, throughout the Bering Sea, Aleutian Basin, AleutianArchipelago, and the Gulf of Alaska, and from southeastern Alaska south to southern California. Samples were collected by a number of agencies and institutions over a 30-year period (1953-83), but were primarily from NWAFC demersaltrawls. The distributions of all species with 100 or more occurrences in the data set were plotted by computer.Distributions plotted from these data were then compared with geographic and depth-range limits given in the literature. These data provide new range extensions(geographic, depth, or both) for 114 species. Questionable extensions are noted, the depth ranges determined for 95% of occurrences, and depths of most frequent occurrence are recorded. Ranges of the species were classified zoogeographically, according to life zone, and with regard to the depth zone of greatest occurrence. Because most species examined have broad geographic ranges, they do not provide the best information for testing the validity of proposed zoogeographic province boundaries. Because of the location of greatest sampling effort and methods used in sampling,most fIShes examined were eastern boreal Pacific, sublittoral-bathyal (outer shelf) species. (PDF file contains 158 pages.)
    Keywords: Ecology ; Management ; Fisheries ; Biology
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    NOAA/National Marine Fisheries Service
    In:  http://aquaticcommons.org/id/eprint/2758 | 403 | 2011-09-29 18:25:30 | 2758 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: A stock assessment of the Atlantic menhaden, Brevoortia tyrannus, fishery was conducted with purse-seine landings data from 1940 to 1984 and port sampling data from 1955 to 1984. These data were analyzed to determine growth rates,maximum sustainable yield (MSY), spawner-recruit relationships, and yield per recruit. Virtual population analysis was used to estimate stock size, year classsize, and fishing mortality rates.Surplus production models produced estimates of MSY from 450 to 490 kmt compared with yields of 416to 436 kmt based roughly on maximum recruitment from a weak spawner-recruit relationship. Recruitment to age-I ranged from 1.2 to 14.8 billion fish for year classes 1955-81. Recent mean recruitment to age-I for the 1975-81 year classes averaged 5.7 billion fish and compared favorably with the mean of 7.7 billion age-I fish recruited during the late 1950's. Mean recruitment from recent years suggests possible coastwide yields of 416 to 481 kmt. Continued dominance of late age-2 spawners among the spawning stock is of concern, since the stock is at greater risk through poor recruitment if recent favorable environmental conditions change.Yield-per-recruit estimates ranged from 46 g to 59 g since 1970. The high dependency of the modern fishery on prespawners has increased concerns about fluctuations in year-to-year availability and catches. To increase yield and enhance the stability of the resource, the number of age classes contributing significantly to the fishery should be increased, creating a butTer against future poorrecruitment years and lessening the year-to-year fluctuations in landings. (PDF file contains 24 pages.)
    Keywords: Management ; Fisheries
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    NOAA/National Marine Fisheries Service
    In:  http://aquaticcommons.org/id/eprint/2763 | 403 | 2011-09-29 18:26:03 | 2763 | United States National Marine Fisheries Service
    Publication Date: 2021-06-28
    Description: This report summarizes (I) annual purse seine landings of Atlantic menhaden, Brevoortia tyrannus, for 1972-84, (2) estimated numbers of fish caught by fishing area. (3) estimates of nominal fishing effort and catch-per-unit-effort, (4) mean fish length and weight, and (5) major changes in the fishery. During the 1970s stock size and recruitment increased and the age composition broadened. reversing trends witnessed during the fishery's decline in the 1960s. Landings steadily improved and by 1980 the total coast wide landings exceeded 400,000 metric tons.Nevertheless, the character of the fishery changed considerably. Eleven reduction plants processed fish at seven ports in 1972, but in 1984 only eight plantsoperated at live ports. Beginning in the mid-1960s the center of fishing aclivity shifted from the Middle Atlantic area to the Chesapeake Bay area, which has continued to dominate the fishery in landings and effort through the 1970s and 1980s. During this period the average size and age of fish in the catches declined. (PDF file contains 30 pages.)
    Keywords: Ecology ; Management ; Fisheries
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    NOAA/National Marine Fisheries Service
    In:  http://aquaticcommons.org/id/eprint/2764 | 403 | 2011-09-29 18:26:19 | 2764 | United States National Marine Fisheries Service
    Publication Date: 2021-06-28
    Description: A stock assessment of the gulf menhaden. Brevoortia patronus, fishery was conducted with data on purse-seine landings from 1946 to 1985 and port sampling data from 1964 to 1985. These data were analyzed to determine growth rates,yield-per-recruit, spawner-recruit relationships, and maximum sustainable yield (MSY). Virtual population analysis was used to estimate stock size, year-classsize, and fishing mortality rates. During the period studied, an average of 27% of age-l fish and 55% of age-2 and age-3 fish were taken by the fishery, and 54% for age-I and 38% for age-2 and -3 fish were lost annually to natural causes.Annual yield-per-recruit estimates ranged from 6.9 to 19.3 g, with recent mean conditions averaging 12.2 g since 1978. Surplus production models produced estimates of MSY from 620 to 700 kilometric tons. Recruits to age-I ranged from 8.3 to 41.8 billion fish for 1964-82. Although there was substantial scatter about the fitted curves, Ricker·type spawner-recruit relationships were found suitable for use in a population simulation model. Estimates of MSY frompopulation simulation model runs ranged from 705 to 825 kilometric tons with F -multiples of the mean rate of fishing ranging from 1.0 to 1.5.Recent harvests in excess of the historical MSY may not be detrimental to the gulf menhaden stock. However, one should not expect long-term harvesting above the historical MSY because of the short life span of gulf menhaden andpossible changes from currently favorable environmental conditions supporting high recruitment.(PDF file contains 24 pages.)
    Keywords: Ecology ; Management ; Fisheries
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    NOAA/National Marine Fisheries Service
    In:  http://aquaticcommons.org/id/eprint/2766 | 403 | 2011-09-29 18:26:27 | 2766 | United States National Marine Fisheries Service
    Publication Date: 2021-06-28
    Description: The ecology and reproductive biology of the leatherback turtle (Dennochelys coriacea) was studied on a high-energy nesting beach near Laguna Jalova, Costa Rica, between 28 March and 8 June 1985. The peak of nesting was between 15April and 21 May. Leatherbacks here measured an average 146.6 cm straightline standard carapace length and laid an average 81.57 eggs. The eggs measured a mean 52.12 mm diameter and weighed an average of 85.01 g. Significant positive relationships were found between the carapace lengths of nesters and their clutch sizes and average diameter and weight of eggs. The total clutch weighed between 4.02 and 13.39 kg, and yolkless eggs accounted for an average 12.4% of this weight. The majority of nesters dug shallow (〈24 cm) body pits and spent an average81 minutes at the nest site. A significant number of c1utcbes were laid below the berm crest. In a hatchery 42.2% of the eggs hatched, while in natural nests 70.2%hatched. The average hatchling carapace length was 59.8 mm and weight was 44.6 g. The longevity of leatherback tracks and nests on the beach was affected by weather. One nester was recaptured about one year later off the coast ofMississippi, U.S.A. Egg poaching was intense on some sections of the Costa Rican coast. Four aerial surveys in four different months provided the basis for comparingdensity of nesting on seven sectors of the Caribbean coast of Costa Rica. The beach at Jalova is heavily used by green turtles (Chelonia mydJJs) after the leatherback nesting season. The role of the Parque Nacional Tortuguero in conserving the leatherback and green turtle is discussed.(PDF file contains 20 pages.)
    Keywords: Ecology ; Management ; Fisheries ; Biology
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    In:  http://aquaticcommons.org/id/eprint/2765 | 403 | 2011-09-29 18:26:25 | 2765 | United States National Marine Fisheries Service
    Publication Date: 2021-06-28
    Description: The food habits of 20 species of pelagic nekton were investigated from collections made with small-mesh purse seines from 1979-84 off Washington and Oregon. Four species (spiny dogfish, Squalus acanthias; soupfin shark, Galeorhinus zyopterus; blue shark, Prionace glauca; and cutthroat trout, Salmo clarki) were mainly piscivorous. Six species (coho salmon, Oncorhynchus kisutch; chinooksalmon, O. tshawytscha; black rockfish, Sebastes melanops; yellowtail rockfish, S. f1avidus; sablefish, Anoplopoma fimbria; and jack mackerel, Trachurus symmetricus)consumed both nektonic and planktonic organisms. The remaining species (market squid, Loligo opalescens; American shad, Alosa sapidissima; Pacific herring, Clupea harengus pallasi; northern anchovy, Engraulis mordax; pinksalmon, O. gorbuscha; surf smelt, Hypomesus pretiosus; Pacific hake, Merluccius productus; Pacific saury, Cololabis saira; Pacific mackerel, Scomber japonicus;and medusafish, Icichthys lockingtom) were primarily planktonic feeders. There were substantial interannual, seasonal, and geographic variations in the diets ofseveral species due primarily to changes in prey availability. Juvenile salmonids were not commonly consumed by this assemblage of fishes (PDF file contains 36 pages.)
    Keywords: Ecology ; Management ; Fisheries
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    NOAA/National Marine Fisheries Service
    In:  http://aquaticcommons.org/id/eprint/2761 | 403 | 2011-09-29 18:25:59 | 2761 | United States National Marine Fisheries Service
    Publication Date: 2021-06-28
    Description: Routine biostatistical port sampling data and landings records collected from the gulf menhaden purse seine fishery between 1974 and 1985 are updated. During most of the period, a total of 11 menhaden reduction plants operated in Mississippi and Louisiana, and the number of vessels in the purse seine fleet varied from 71 to 82. Total annual landings ranged from 447,100 metric tons in 1977 to the record landings for the fishery of 982,800 metric tons in 1984. Age-I and -2 gulf menhaden annually comprised almost 96% of the landings. Estimated totalnumbers of menhaden landed varied from 4,510.5 million in 1975 to 11,154.9 million in 1985. Annual mean lengths and weights of sampled fish-at-age showed lillie variation. Nominal or observed fishing effort gradually increased through Ihe 1970s and 1980s, reaching 655,800 vessel-ton-weeks in 1983. (PDF file contains 14 pages.)
    Keywords: Ecology ; Management ; Fisheries ; Biology
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  • 100
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    NOAA/National Marine Fisheries Service
    In:  http://aquaticcommons.org/id/eprint/2770 | 403 | 2011-09-29 18:26:57 | 2770 | United States National Marine Fisheries Service
    Publication Date: 2021-06-28
    Description: Despite its wide acceptance in other fisheries, limited access remains a controversial topic among Pacific coast groundfish fishermen and fishery managers. It is controversial because it immediately opens a wide array of public policy issues. How should the public conservefish stocks, and who should benefit from harvesting thosefish? What are the costs and benefits to the public, the taxpayer, the fishing industry, and the coastal communities supporting the groundfish industry? Should the government push the industry to be economically efficient in harvesting; or should it discourage technical efficiency to conserve fish stocks? Should management preserve the economic status quo by protecting existing harvest shares? These are the broad issues occupying the discussions ofpolicy makers and academic writers concerned with resourcemanagement.The goal of this introductory section is to define limited access, to dispel some basic misunderstandings about limited access, to clarify the optional forms oflimited access, and to review the various resource management objectives addressed. This should set the stage for the following more lengthy discussions. By reducing the scopeof needless misunderstandings, it should also help to make future discussions of limited access more productive. (PDF file contains 52 pages.)
    Keywords: Ecology ; Management ; Fisheries ; Biology
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
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