Crayfish Surveys and Management

Virile crayfish Orconectes virilis, one of the more recent aquatic invasive species to be found in England

Virile crayfish Orconectes virilis, one of the more recent aquatic invasive species to be found in England

Five Rivers Environmental Contracting provide a full range of surveys for white-clawed crayfish and non-native crayfish. Common survey methods include manual search, torching and trapping.

The United Kingdom has one native species, the White Clawed Crayfish (Austropotomobius pallipes), and seven known non-native invasive species in the wild. These are as follows:

  • Signal Crayfish (Pacafastacus leniusculus)
  • Turkish Crayfish (Astacus leptodactylus)
  • Noble Crayfish (Astacus astacus)
  • Spiny-Cheek Crayfish (Orconectes limosus)
  • Virile Crayfish (Orconectes virilis)
  • Red Swamp Crayfish (Procambarus clarkii)
  • White River Crayfish (Procambarus acutus)

Populations of white-clawed crayfish have declined rapidly since the 1970s and remaining populations are under constant threat due to the introduction of non-native invasive species and associated crayfish plague.

The UKs only native species of crayfish, in decline across the country but still locally abundant in isolated pockets

The UKs only native species of crayfish, in decline across the country but still locally abundant in isolated pockets

Our specialist ecologists have held Natural England survey class licences for white-clawed crayfish for a number of years and are able to devise and carry out appropriate survey strategy for a multitude of project needs. We have extensive experience of carrying out non-native invasive crayfish surveys and have authored a number of peer reviewed scientific papers on the subject.

We can advise on conservation strategies as well as containment and control measures for non-native invasive species.


We would love to hear from you…

If you would like to find out more about who we are and what we do contact the team on 01722 783041 or email office@five-rivers.com