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Manual On Sample Based Data Collection For Fisheries Assessment
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Book Synopsis Manual on Sample-based Data Collection for Fisheries Assessment by : Per Sparre
Download or read book Manual on Sample-based Data Collection for Fisheries Assessment written by Per Sparre and published by Food & Agriculture Org.. This book was released on 2000 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: This manual deals with the practical implementation of a routine data collection programme. The data collection programme is developed through a top-down approach, from the identification of the objectives down to the practical recording and management of data obtained from the fishery. The issues are dealth with both through detailed discussion and by using simple examples. The examples are mostly based on situations in tropical fisheries, and in particular, experience has been drawn from developing a data collection programme in Viet Nam. The main questions addressed i n the manual are which fisheries data to collect, where and when to collect them. Only data from commercial marine capture fisheries are considered. The methodologies used are mainly appropriate for a tropical, developing county, with many small (artisanal) vessels and a few large (industrial) vessels. The methodology is the "sample-based approach". The data collection methodology presented attempts to utilize whatever information can be obtained in practice in a developing country.
Book Synopsis Data preparation to inform assessment and management approaches in data-limited fisheries by : Amoroso, R.
Download or read book Data preparation to inform assessment and management approaches in data-limited fisheries written by Amoroso, R. and published by Food & Agriculture Org. [Author]. This book was released on 2024-04-26 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: In fisheries science and management, it is not uncommon that fishery data are used at “face value”, as inputs into data-limited assessments or empirical indicator-based frameworks for management, without first conducting a thorough exploration and critical review of the data. [Author] This practice may lead to biases in results and misdirected fishery management actions. [Author] To address intermediate steps between data collection and any analysis used to inform stock status, this manual provides guidance on how to prepare, explore and critically review fishery data in data-limited situations. [Author] Throughout the manual, guidance and sample data are provided primarily in Microsoft Excel or in comma separated value (CSV) file formats, as well as through FishualizeR, a publicly available, web-based, R Shiny app that was developed to support the manual. [Author] Instructions in this manual are not intended to present a single, prescriptive path, but rather to provide guidance that may be further tailored to each individual context. [Author] It is the authors’ hope and intent that the guidance contained in this manual will allow users to better understand their data, make corrections, and gain a deeper understanding of the data’s utility in assessment and management of data-limited fisheries. [Author]
Book Synopsis FAO-ICLARM stock assessment tools by : F. C. Gayanilo
Download or read book FAO-ICLARM stock assessment tools written by F. C. Gayanilo and published by Food & Agriculture Org.. This book was released on 1997 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Guidelines for designing data collection and sharing systems for co-managed fisheries. 1. Practical guide by : Ashley S. Halls
Download or read book Guidelines for designing data collection and sharing systems for co-managed fisheries. 1. Practical guide written by Ashley S. Halls and published by Food & Agriculture Org.. This book was released on 2005 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Virtual Population Analysis by : Hans Lassen
Download or read book Virtual Population Analysis written by Hans Lassen and published by Food & Agriculture Org.. This book was released on 2001 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Virtual population analysis (VPA) is a widely used model for the analysis of fished populations. While there are many VPA techniques, they vary in the way they use data and fit the model rather than in the form of the model itself. This manual describes the common VPA model and the assumptions on which it is based, together with descriptions of associated diagnostic procedures and common reference points
Book Synopsis Guidelines for Designing Data Collection and Sharing Systems for Co-managed Fisheries: Practical guide by : Ashley S. Halls
Download or read book Guidelines for Designing Data Collection and Sharing Systems for Co-managed Fisheries: Practical guide written by Ashley S. Halls and published by Food & Agriculture Org.. This book was released on 2005 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: The increasing shift towards co-management has prompted managers to reflect upon their new roles and reconsider information requirements. This technical paper, in two parts, is aimed to meet the growing need among co-managers for guidelines to help design and implement appropriate and cost-effective data collection programmes or systems. Part 1: Practical guide has been written specifically for co-managers and facilitators working in the field and offers simple and practical advice on helping stakeholders identify their information needs in relation to their management objectives and responsibilities, and developing collaborative ways of collecting and sharing the information in the most effective way. (Part 2 is ISBN 92-5-105410-X)
Book Synopsis Good practices guidelines for data collection systems to support sustainable inland and recreational fisheries in the Western Balkans region by : Visser, T.A.M, Valbo-Jorgensen, J., Chomo, V.
Download or read book Good practices guidelines for data collection systems to support sustainable inland and recreational fisheries in the Western Balkans region written by Visser, T.A.M, Valbo-Jorgensen, J., Chomo, V. and published by Food & Agriculture Org.. This book was released on 2021-02-26 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: These guidelines illustrate recommendations for good practices on data collection in Eastern European inland fisheries, and in particular the Western Balkan region, based on the methodologies and approaches used in countries throughout Europe and from FAO experience of inland fisheries in other regions. They provide guidance on the options available to inland fishery managers based on particular circumstances i.e. commercial fishing or recreational use, and they are especially relevant for assisting the economies-in transition in Europe, Caucasus and Central Asia. These guidelines are not an overarching work on inland fisheries management, nor do they provide advice on the environmental aspects or competing uses of inland water bodies. They focus on issues of data collection to support fishery managers whether they be government agencies, fishers or angler associations co-responsible for the management of inland resources in European rivers and lakes.
Book Synopsis Fish Sampling Manual by : New York (State). Division of Fish and Wildlife
Download or read book Fish Sampling Manual written by New York (State). Division of Fish and Wildlife and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Food and Agriculture Organization of the United Nations Publisher :Food & Agriculture Org. ISBN 13 :9251346224 Total Pages :93 pages Book Rating :4.2/5 (513 download)
Book Synopsis Better data collection in shark fisheries – Learning from practice by : Food and Agriculture Organization of the United Nations
Download or read book Better data collection in shark fisheries – Learning from practice written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2021-07-07 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: Some species and stocks of sharks, rays, skates, and chimaeras (termed shark in this review) are rapidly depleting due to climate change, land-based influences, and overfishing. These pressures, coupled with sharks’ low reproductive potential (slow growth and delayed maturation; long reproductive cycles; low fecundity; and long lifespans) place sharks in a risk profile that is more akin to mammals on land than fish in the ocean. The development of policy, and the delivery of management and conservation measures regulating the use, international trade, and capture of sharks (whether as a targeted species or as bycatch in fisheries), is hindered by gaps in basic knowledge – a knowledge that is required in order to get a clear sense of their status in real-time. Many countries are establishing or strengthening monitoring across shark value chains to overcome these shortfalls in information. This document reviews what shark fisheries data is being collected, highlighting the opportunities and constraints in collecting information on sharks in fisheries, based on practical experience. It includes information from 28 surveys across 19 countries: 9 in the Mediterranean, 5 in Africa, 3 in Asia, and 1 in Oceania. Interviews were conducted with data collectors and managers across the entirety of the survey process, while data collection variables were documented in order to inform those interested in the collection, provision, and exchange of shark information on common practices and their commonalities. The review identifies standardized information metrics which, if collected more generally, would strengthen the opportunity for harmonized reporting and cross-comparability across surveys. In addition – and in order to assess the status quo – the current data collection requirements of management measures applied to sharks by regional fisheries management organizations (RFMOs) were reviewed, including “no retention” measures. Finally, the review proposes a list of the minimum standard measurements and common life-history parameters required to support the assessment of shark stocks in fisheries.
Author :Food and Agriculture Organization of the United Nations Publisher :Food & Agriculture Org. ISBN 13 :9251315388 Total Pages :96 pages Book Rating :4.2/5 (513 download)
Book Synopsis Monitoring discards in Mediterranean and Black Sea fisheries: methodology for data collection by : Food and Agriculture Organization of the United Nations
Download or read book Monitoring discards in Mediterranean and Black Sea fisheries: methodology for data collection written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2019-09-03 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discards – the part of the catch that is not retained on board, which may include target species or any other (commercial and non-commercial) species that are returned at sea dead or alive – usually result in a reduction of harvesting opportunities and may have negative consequences on the stocks, ecosystems and the marine environment. In the Mediterranean and the Black Sea, studies on discards only cover a small portion of the total fishing activities and discard rates are often poorly estimated or totally unknown. Information is lacking for many types of fishing gear, countries and GFCM subregions, and most available studies only cover relatively short periods and small areas. Discards therefore represent a major source of uncertainty about the actual fishing mortality rates of stocks. These knowledge gaps highlight the need to expand discard monitoring programmes and standardize practices, so to assess discards appropriately and address their important impacts. This publication and the methodology discussed herein aim to provide a framework for the development and implementation of an efficient, standardized data collection and monitoring system for discards through on-board observations, questionnaires at landing sites and self-sampling activities. It ensures minimum common standards for the collection of discards data and allows for repeatability and comparisons among fisheries across the region, thus offering a harmonized basis of knowledge, information and evidence for decision-making.
Author :Food and Agriculture Organization of the United Nations Publisher :Food & Agriculture Org. ISBN 13 :9789251043042 Total Pages :128 pages Book Rating :4.0/5 (43 download)
Book Synopsis Guidelines for the Routine Collection of Capture Fishery Data by : Food and Agriculture Organization of the United Nations
Download or read book Guidelines for the Routine Collection of Capture Fishery Data written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 1999 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: "These guidelines aim to help those who design routine data collection programmes, focusing on the relationship between typical questions asked by policy-makers and managers, and the data required for providing reliable answers. Fisheries policy and management objectives, particularly under the precautionary approach, need to be based upon analyses of reliable data. Data are needed to make rational decisions, evaluate the fisheries performance in relation to management activities and fulfil regional requirements. These objectives are achieved using fishery performance indicators. Indicators are used to measure the state of the resource, the performance of fishing controls, economic efficiency, socio-economic performance and social continuity. The primary factor in choosing what data to collect is the link between the necessary operational, biological, economic and socio-cultural indicators and their associated variables. The way in which different data variables are collected needs tobe tailored to the structure of the fishery. The strategy will be strongly influenced by the budget and personnel available, and the degree to which fishers and others co-operate. The programme must identify which variables should be collected through complete enumeration and which can be sampled. Collection methods are influenced by the variable itself, the strategy, collection point and the skill of the enumerator. Once collected, fishery data must be stored securely, but made easily available for analysis, which is achieved through a computer-based data management system, following the basic data processing principles. The implementation of a data collection programme should follow a normal project cycle, developing a new legal and institutional framework as appropriate"--Abstract.
Book Synopsis Sampling Methods Applied to Fisheries Science by : Emygdio L. Cadima
Download or read book Sampling Methods Applied to Fisheries Science written by Emygdio L. Cadima and published by Food & Agriculture Org.. This book was released on 2005 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective of this manual is to present the basic and standard concepts of sampling methods applied to fisheries science. In order to ensure sound fisheries research, it is essential to have reliable data from landing ports, fishery stocks and research surveys. A rational management of fishing resources can then be established to ensure a sustainable exploitation rate and responsible fisheries management, providing long-term benefits for all. This document provides an introduction to sampling theory and introduces the theory of the three worlds (population, sample and sampling), as well as a short revision of probability concepts. It also provides an overview of the simple random, random stratified, cluster and two-stage sampling methods. The expressions for estimating the mean and total of the populations, their sampling distributions, the expected values, the sampling variances and their estimates are included and justified for each of the sampling designs. The document also contains a case study of biological sampling from landing ports and exercises that should be used to further understanding of the objectives of sampling and its advantages for fishery resource studies.
Book Synopsis Fish Stock Assessment Manual by : Emygdio L. Cadima
Download or read book Fish Stock Assessment Manual written by Emygdio L. Cadima and published by Food & Agriculture Org.. This book was released on 2003 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: This manual examines mathematical models applied in fish stock assessment, including models and variation rates; cohort models and analyses; stock fishing patterns, components, stock-recruitment relations, short- and long-term stock projections; fisheries resources management with regards to biological reference points and regulation measures; production models; estimation of parameters; and exercises.
Author :Tilley, A. and Roscher, M. (Ed.) Publisher :Food & Agriculture Org. ISBN 13 :9251336040 Total Pages :114 pages Book Rating :4.2/5 (513 download)
Book Synopsis Information and communication technologies for small-scale fisheries (ICT4SSF) - A handbook for fisheries stakeholders by : Tilley, A. and Roscher, M. (Ed.)
Download or read book Information and communication technologies for small-scale fisheries (ICT4SSF) - A handbook for fisheries stakeholders written by Tilley, A. and Roscher, M. (Ed.) and published by Food & Agriculture Org.. This book was released on with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this report is to present evidence towards how Information and Communication Technologies for Small-scale Fisheries (ICT4SSF) might enable and support the implementation of the FAO’s Voluntary Guidelines for Securing Sustainable Small-Scale Fisheries in the Context of Food Security and Poverty Eradication (SSF Guidelines). We present case studies of ICT4SSF initiatives in different use areas to identify key themes and reflect on successes and failures. There are very few baselines against which to compare fisher wellbeing and access before and after ICT initiatives, and this gap is an important finding in this report. Thus far, success has only been assessed qualitatively and relatively, in terms of uptake, sustainability and local legitimacy. Still, some ICT4SSF initiatives presented in this document are closely aligned with the Principles for Digital Development and the objectives of the SSF Guidelines. These initiatives highlighted that when ICTs are locally led or developed, or co-designed with end users and marginalised groups, or strengthened already existing networks and technologies, the potential for positive impact is much higher. However, there is much less evidence of proactive confrontation of inequality through data ownership. Further, there are very few examples of developing mechanisms for fishers and fish workers to hold, access or own their data, or legal mechanisms to recognise their ownership, or protect them against misuse or manipulation.
Book Synopsis Sample-based Fishery Surveys by : Constantine Stamatopoulos
Download or read book Sample-based Fishery Surveys written by Constantine Stamatopoulos and published by Fao. This book was released on 2002 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook summarises the experience gained over recent years in fishery statistical development by the Fishery Information, Data and Statistics Unit of the FAO, and provides guidance for developing and implementing cost-effective and sustainable fishery surveys. The methodological and operational concepts discussed apply equally to marine and inland capture fisheries. The emphasis is placed on the understanding and interpretation of the statistics, rather than on the computations producing them.
Author : Publisher :Food & Agriculture Org. ISBN 13 :9251390657 Total Pages :384 pages Book Rating :4.2/5 (513 download)
Download or read book written by and published by Food & Agriculture Org.. This book was released on with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Safety in Sampling by : Constantine Stamatopoulos
Download or read book Safety in Sampling written by Constantine Stamatopoulos and published by Food & Agriculture Org.. This book was released on 2004 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper considers issues of sampling accuracy when sample-based data collection operations are performed under operational constraints, a concern of fishery administrations with limited budgets and human resources. It focuses on the determination of safe sample size using classical statistical methods in light of specific target populations. The concepts and methods discussed apply equally to both marine and inland capture fisheries, and can be adapted to commonly used data collection systems.
