BS EN 14757 is a European standard covering sampling of fish with multi-mesh gillnets to explain population dynamics, size distribution and how fish react to environmental and climate changes.
BS EN 14757 specifies a method for the sampling of fish in lakes using benthic multi-mesh gillnets and gives recommendations on the sampling of fish with pelagic multi-mesh gillnets.
BS EN 14757 method provides a whole lake estimate for species occurrence, quantitative relative fish abundance, biomass expressed as Catch Per Unit Effort (CPUE) and size structure of fish assemblages in temperate lakes. It also provides estimates that are comparable over time within a lake and between lakes.
BS EN 14757 specifies routines for sampling, data handling and reporting and provides information on applications and further treatment of data.
BS EN 14757 also guides the sampling of fish for age and growth analyses. According to the principles of BS EN 14757, other lentic water bodies can be sampled.
BS EN 14757 on the sampling of fish with multi-mesh gillnets applies to:
Fish sampling is a common method of gathering information about fish populations and ageing analysis. This sampling typically entails capturing fish for which multi-mesh gillnets are used, but it can also be done by watching fish in their natural habitats. Age and growth analyses of the caught fish will increase the sampling information.
BS EN 14757 provides users guidance on sampling fish for age and growth analysis, including the selection of individuals, choice of hard structure for age and growth analysis, species and additional hard structure, enabling accurate analysis of the fish and their population dynamics.
BS EN 14757 provides users guidance on principle, equipment, sampling design, procedure, time-series sampling, inventory sampling, data handling and reporting, dealing with gillnet selectivity, estimation of sampling variance, and more, which facilitates capturing fishes for sampling and analysis to draw conclusions related to aspects such as reaction to changes in the environment.
By adopting BS EN 14757, users can easily capture fishes with multi-mesh gillnets for sampling and analysis, providing essential information on the size and growth of fish, measurement of mortality rate due to fishing and natural causes population dynamics and how fish react to environmental and climate changes.
BS EN 14757:2015 supersedes BS EN 14757:2005, which is now withdrawn.
Changes in BS EN 14757:2015 include:
EN 14757:2015