EN 14757:2015

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Equipment
6 Sampling design and procedure
7 Time series sampling
8 Inventory sampling
9 Data handling and reporting
10 Dealing with gillnet selectivity
11 Estimation of sampling variance
12 Applications and further analyses
13 Limitations and supplementary sampling
14 Alternative sampling
Annex A (informative) - Distribution of benthic multi-mesh
         gillnets at different depth strata in lakes
         with different area and maximum depth
Annex B (informative) - Sampling fish for age and growth analysis
Annex C (informative) - Example of forms for registration of fish
        and supplementary data data
Bibliography

This European Standard specifies a standardised method for sampling fish in lakes, using benthic multi-mesh gillnets. The method provides a whole-lake estimate for species occurrence, quantitative relative fish abundance and biomass expressed as Catch Per Unit Effort (CPUE), and size structure of fish assemblages in temperate lakes. It also provides estimates, which are comparable over time within a lake and between lakes. This European Standard specifies routines for sampling, data handling and reporting, and provides information on applications and further treatment of data. This European Standard also provides guidance on sampling of fish with pelagic multi-mesh gillnets and sampling of fish for age and growth analyses. Selected references in support of this European Standard are given in the Bibliography.