Crayfish & electric fishing surveys - Sussex
Pisces Conservation was asked to undertake surveys for native white-clawed crayfish and fish populations in streams along the route of the proposed Bexhill - Hastings Link Road, East Sussex. The road was scheduled to cross the Combe Haven valley, a SSSI site encompassing a number of streams.
Austropotamobius pallipes is a vulnerable freshwater crayfish, the only species native to the British Isles. Under strictly licensed conditions, we carried out trapping surveys in streams across the valley to assess the presence of crayfish populations. A number of crayfish were captured, all shown to be the invasive North American signal crayfish, Pacifastacus leniusculus.
As well as the crayfish surveys, quantitative electric fishing was carried out in the streams of the Combe Haven valley, to assess the populations of coarse and salmonid fish.
Pisces staff are well-experienced in survey techniques designed for sensitive and rare species such as the white-clawed crayfish, water vole, and great-crested newt. In addition, we have a good working relationship with statutory bodies such as the Environment Agency and Natural England, responsible for issuing consent to trap such species.