Fish Surveys for Thames Water

Our Monitoring team have recently been working with Ricardo on behalf of Thames Water, undertaking routine monitoring works. As part of the works, we returned to a previous client’s residence to perform a fish survey, which we delivered in the backdrop of the oak revetment we installed several years ago.

As part of the fish survey, we electro-fished a 100-metre section of river which was netted off at both ends. We used three anodes to fish the site three times to undertake depletion sampling. The idea behind this is that you catch 60% of fish in the first run, 30% in the second and 10% in third. We recorded species and lengths of each fish caught, before safely returning them back to the watercourse. We then ran the data through a model which gave us predicted numbers each species in that 100-metre section. Species caught included brown trout, grayling, chub, pike, bullhead, minnow and stoneloach.


Our peak period hasn’t finished yet, we’re expecting a busy time until the end of the year. Now is the perfect time to get in contact with our Monitoring experts to discuss your future requirements – contact us here.

About FiveRivers

FiveRivers is a leading industry specialist in the monitoring, consultation, design, and delivery of ecological and environmental nature-based solutions. With over 25 years’ working with nature, our expertise encompasses terrestrial and aquatic habitats with a specific passion for rivers and wetlands.

Our services deliver environmental protection, enhancement and restoration through environmental and ecological monitoring. ecological mitigation and habitat improvement. and A specialist of choice, FiveRivers delivers innovative, sensitive, and leading solutions across all sectors.






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