A Review Of Length Based Approaches To Assessing Fish Stocks
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A Review of Length-based Approaches to Assessing Fish Stocks
Author: J. A. Gulland
language: en
Publisher: Food & Agriculture Org.
Release Date: 1992-01-01
This document reviews the several fish stock assessment methods based on length-frequency analysis. Emphasis is placed on sampling and collection of length-frequency data, to the estimation of population parameters such as growth, mortality and recruitment and the estimation of catch selectivity. Attention is given to the conversion of length to age using age-length keys, slicing length-frequency composition, and using modes. It reviews long-and short-term effects of changes in selection and fishing mortality, and discusses methods for long-term assessments and for short-term projections. The manual gives several examples of the most common methods used and stresses the advantages of using personal computers and the most recent software for data processing and analysis.
Stock Assessment for Fishery Management
Author: Daniel D. Hoggarth
language: en
Publisher: Food & Agriculture Org.
Release Date: 2006-01-01
Provides guidelines for fish stock assessment and fishery management using the software tools developed by the UK's Department for International Development's Fisheries Management Science Programme. This report explains some key elements of the precautionary approach to fisheries management and outlines a range of alternative stock assessment approaches.
Fish Stock Assessment
Describes the scientific techniques used in assessing fish stocks, evaluating the effect of fishing on these stocks, and the probable impact of different policies for developing and managing fisheries. Covers the techniques developed starting with simple models and continuing to more complex methods.