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Grayling Weight Survey

The GRT has launched a project to record the length and weight of grayling. The length/weight (condition factor) of a grayling may vary across the country/continent. There will be seasonal variation, as fish lose and gain weight depending on the food availability and the onset of spawning. This study is being undertaken because there is little information on the condition factor of grayling. It is hoped that the findings from this study will be used to gain a better understanding of grayling populations. To make reporting fish lengths and weights easy, a short submission form is available below or simply tweet (@GRT_Updates or #graylingweight).

Please fill in all required fields.

Information from this survey will be feed into our condition factor tool.


Latest News

New DNA study needs Anglers help!

In 2008/09, anglers collected over 1100 grayling adipose fin clip samples from 27 catchments the UK. The samples were used to extract DNA and for the first time, help us understand the genetic make up and diversity of grayling across the UK. This information was later used to influence stocking of UK grayling (Summary).

We now have another genetic study and need new samples. However, instead of fin clips we will be using swabs (cotton buds) to collect DNA from the mouth and gill cavity. The sampling invloves taking a swab of the mouth and gills of fish, an estimate of fork length and condition of the fish and a record of the date and geographic location. We need a minimum of 30 samples per catchment. If you feel you are able to contribute samples to the project, please contact us. Further details.

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