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Grayling Spawning Survey

The GRT has launched a project to record sightings and the timing of grayling spawning; i.e. actually laying eggs, rather than just pre-spawning movements onto spawning areas, or pre-spawning behaviour, which are also of interest, but take place over a longer time. This study is being undertaken because there is little information on the timing of grayling spawning and how this varies across the country/continent. It is hoped that the findings from this study will be used to inform the planning of in-stream engineering works and help protect important spawning habitat. If you are out on the river bank and notice grayling spawning, please let the GRT know: the River, Date, Location (NGR, or marked up map, if possible but certainly at least nearest town/village) and any additional observations. To make reporting sightings easy, a short submission form is available below or simply tweet (@GRT_Updates or #graylingspawning). Results will be mapped and displayed on the GRT website as they come in, and a full report will be presented at the AGM in Pickering, so you can compare rivers.

To help people recognise when grayling are spawning, a video is available to watch on the GRT website under About Grayling (Spawning).

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GS Symposium Speakers

GRT Funded MSc, PhD Studies

Two degree project interim reports were among presentations at the most recent Grayling Society symposium. Both studies are currently funded by the GRT and both operate on a premise that alongside the intrinsic value of grayling as a game fish, their survival challenges provide early indication of problems that are or will likely become problems for other salmonids.

 

Stephen Gregory (Game and Wildlife Conservation Trust) described an MSc study plan for statistical mining of the existing Wylye Study data, questioning the effect of extreme climate events on grayling population dynamics. He emphasized that the GWCT now leads all processing aspects of the 30-year Wylye Grayling Study (WGS) dataset - the longest and most complete in Europe...possibly in the world.

 

Vanessa Huml's (Manchester Metropolitan University) PhD study is titled Assessing adaptive genetic variation for effective management and conservation of European grayling. Read her description of planned work, noting reference to new sequencing technology and reference to the four U.K. genetically distinct groups identified in the earlier genetic census funded by the GRT.

 

The two studies both look at grayling population health/stability under extant environmental conditions but the doctoral work extends inquiry to genetic proclivity for survival ('evolvability').

 

Both investigators will submit detailed results for publication here after review in their respective peer literature.