Freshwater ecologist recording river corridor survey notes

River Habitat Survey & Impact Assessment

Carcinus Ltd was commissioned by Hampshire County Council (HCC) to deliver river habitat surveys and impact assessment consultancy services with a focus on fish ecology in support of a proposed flood alleviation project in Winchester on the River Itchen. The project was in its initial phases and a baseline characterisation of the existing fisheries and fish habitats and initial environmental assessment to inform engineering considerations was required.

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Quantitative lamprey electrofishing survey

Lamprey Survey Population Assessment – River Itchen SAC SSSI

Carcinus Ltd was commissioned by Natural England and the Environment Agency to undertake a catchment wide lamprey population study on the River Itchen, Hampshire. The River Itchen is a designated Special Area of Conservation (SAC) and a Site of Special Scientific Interest (SSSI). The river forms part of Natural England’s “Hampshire chalk catchment” focus area and covers approximately 310 hectares of classic chalk river.

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Barrier to migratory fish migration

Fish Habitat Assessment & Enhancement Study

Carcinus Ltd was commissioned by Hampshire County Council (HCC) to deliver fish habitat assessment surveys and habitat enhancement consultancy services in support of the high-profile Botley Bypass highways project. The project has been permitted after passing through the Environmental Impact Assessment (EIA) process and planning phase. The scheme will involve the crossing of two watercourses, the first being the River Hamble by a new free-span bridge and the second located at Woodhouse Gully / Pudbrook Lake, where an existing culvert will be replaced.

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Freshwater Ecology Surveyor

Aquatic Ecology, Habitat Restoration & Management Plan

Carcinus Ltd was commissioned by a Council as part of an amenity improvement drive to assess the aquatic ecology of a freshwater balance pond and produce a detailed habitat restoration and management plan. The pond was known to be suffering from a number of pre-existing ecological issues including heavy silting, lack of freshwater input and foul odours as well as excessive leaf fall, historic fish kills and infestation by invasive non-native species (INNS).

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