On 18 February 2011 Peter Francis and Cyril Bennett  put approximately 3 million BWO eggs into the river at HF, some were on tiles under fly boards, and the bulk were on microscope slides in storage trays suspended in the flow .


When they come out of diapause they will hatch and drop down into the gravel hopefully resulting in a good hatch later in the year


This is totally experimental and has never been tried before, Peter and Cyril will be monitoring on a weekly basis as soon as they start to hatch


Once they start hatching they will monitor above and below the donor site and Cyril will chart the growth rates


If you look at the picture each of the small dots on the tile represents around 1200 eggs

Benchmark biometric footprint of our invertebrates in 2016 on the Mariners beat - thanks to Peter Francis and his team

Benchmark biometric footprint of our invertebrates in 2016 on Sheephatch beat - thanks to Peter Francis and his team