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Author: P. A. van Zwieten
Publisher: Food & Agriculture Organization of the UN (FAO)
ISBN: 9789251067413
Category : Technology & Engineering
Languages : en
Pages : 168
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Book Description
A considerable quantity of data and information were collected on many aspects of the systems of the three reservoirs, including hydrological, biophysical and limnological features, primary production, and fish and fisheries data. This information was condensed and synthesized with the aim of providing a baseline against which the ecological changes that have taken place since impoundment can be described and analysed. Efforts are made to explain changes in fish catch in relation to climatic variations, ecological succession and fishing effort. The review shows that biological data and information are generally available. However, as is also common elsewhere, all three cases suffer from the general tendency to isolate and compartmentalize research into separate disciplines.
Author: P. A. van Zwieten
Publisher: Food & Agriculture Organization of the UN (FAO)
ISBN: 9789251067413
Category : Technology & Engineering
Languages : en
Pages : 168
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Book Description
A considerable quantity of data and information were collected on many aspects of the systems of the three reservoirs, including hydrological, biophysical and limnological features, primary production, and fish and fisheries data. This information was condensed and synthesized with the aim of providing a baseline against which the ecological changes that have taken place since impoundment can be described and analysed. Efforts are made to explain changes in fish catch in relation to climatic variations, ecological succession and fishing effort. The review shows that biological data and information are generally available. However, as is also common elsewhere, all three cases suffer from the general tendency to isolate and compartmentalize research into separate disciplines.
Author: R. D. Gillett
Publisher:
ISBN: 9789251305157
Category :
Languages : en
Pages : 400
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Book Description
Author: Claude Chauvet
Publisher: Food & Agriculture Org.
ISBN: 9789252027164
Category : Technology & Engineering
Languages : fr
Pages : 92
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Book Description
Author: Food and Agriculture Organization of the United Nations
Publisher: Food & Agriculture Org.
ISBN: 9789251054031
Category : Business & Economics
Languages : en
Pages : 264
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Book Description
Elasmobranch - describes a group of fish without a hard bony skeleton, including sharks, skates, and rays.
Author: K. L. Cochrane
Publisher: Food & Agriculture Org.
ISBN: 9789251047736
Category : Business & Economics
Languages : en
Pages : 244
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Book Description
This publication was prepared to promote and to provide support in the implementation of the Code of Conduct for Responsible Fisheries, especially Article 7 : Fisheries Management. As such, it also, supplements the FAO Technical Guidelines for Responsible Fisheries NO. 4: Fisheries management. It is intended primarily for the practising fishery manager and decision-maker, with particular emphasis on developing countries, although it is hoped that the volume will also be of interest to managers in developed countries.
Author:
Publisher:
ISBN: 9789251062289
Category : Aquaculture
Languages : en
Pages : 162
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Book Description
This publication presents the findings of a number of regional and national review desk studies carried out between December 2006 and January 2008 covering China, Japan and India in Asia, Europe, Africa, the United States of America in North America, South America, Oceania, and the Russian Federation. A summary synthesis of the studies is included along with information about the insurance market, demand and supply issues, perils covered, vessels insured, risk management methods applied and underwriting experiences. Providing guidance for the formulation of legal, policy and institutional frameworks in developing countries, it addresses decision-makers at national government levels, as well as international agencies and fisheries sector stakeholders.
Author: Gbola Akande
Publisher:
ISBN: 9789251066713
Category : Aquaculture
Languages : en
Pages : 72
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Book Description
The programme provided capacity building for fishery officers in qualitative and quantitative fish loss assessments methods, planned support, and supervised the implementation of loss assessment studies in five sub-Saharan African countries (Ghana, Kenya, Mali, United Republic of Tanzania and Uganda). Data were generated on quality and physical losses - the main types of losses identified - and quantified by researchers using three assessment methods. The fieldwork indicates that post-harvest fish losses in small-scale fisheries occur at all stages in the fish supply chain from capture to consumer. Huge physical and quality losses were found to occur in some supply chains assessed in all the countries, with quality losses reported to account for more than 70 percent of total losses.
Author: Per Sparre
Publisher: Food & Agriculture Organization of the UN (FAO)
ISBN:
Category : Pets
Languages : en
Pages : 436
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Book Description
In Part 1, Manual, a selection of methods on fish stock assessment is described in detail, with examples of calculations. Special emphasis is placed on methods based on the analysis of length-frequencies. After a short introduction to statistics, it covers the estimation of growth parameters and mortality rates, virtual population methods, including age-based and length-based cohort analysis, gear selectivity, sampling, prediction models, including Beverton and Holt's yield per recruit model and Thompson and Bell's model, surplus production models, multispecies and multifleet problems, the assessment of migratory stocks, a discussion on stock/recruitment relationships and demersal trawl surveys, including the swept-area method. The manual is completed with a review of stock assessment, where an indication is given of methods to be applied at different levels of availability of input data, a review of relevant computer programs produced by or in cooperation with FAO, and a list of references, including material for further reading. In Part 2, Exercises, a number of exercises is given with solutions. The exercises are directly related to the various chapters and sections of the manual.
Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 88
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Book Description
Author: Donald L. Reish
Publisher: Food & Agriculture Org.
ISBN:
Category : Aquatic sciences
Languages : en
Pages : 88
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Book Description
