Research and analysis

Semi-quantitative methods for fisheries classification

A project which has been carried out to evaluate the use of semi quantitative methods for fish stock assessment for use in the Fisheries Classification Scheme.

• From: Environment Agency
• Published: 1 January 1998

Documents

Semi-Quantitative Methods for Fisheries Classification

Ref: LIT 0768

PDF, 3.11 MB, 59 pages

This file may not be suitable for users of assistive technology.

Request an accessible format.

If you use assistive technology (such as a screen reader) and need a version of this document in a more accessible format, please email enquiries@environment-agency.gov.uk. Please tell us what format you need. It will help us if you say what assistive technology you use.

Details

This report discusses the various approaches to calibrating semi-quantitative methods, and critically assesses a number of regional calibration exercises undertaken by the Environment Agency and its predecessors. Three areas for improving these methodologies are identified: 1) a correction for different types of river habitat, 2) the assessment of classification errors and 3) a refinement of the statistical-procedures used.

Published 1 January 1998