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Š Matthijs de Vos

The Greater Thames Fish Migration Roadmap

The Greater Thames Fish Migration Roadmap Amy Pryor of the Thames Estuary Partnership, urges a more integrated approach to facilitating fish migration across freshwater and marine boundaries. Amongst the most fragmented habitats Eel Management Plans (EMPs). More recently, the Greater Thames Estuary (up to tidal limits in the world Rivers in countries of the North Sea region are some of the most fragmented by human development in the world. Diadromous fish, such as the European eel, bass, sea lamprey and flounder, depend on free migration between marine and freshwater habitats to complete their life cycle. Habitat loss or changes upstream and downstream, river channel and geomorphology changes, flow dynamics and so on, mean that technical fish pass solutions will always be mitigation for a single structure rather than a complete solution. Various EU Directives and national legislation require ‘no further deterioration’ in ecological indicators and in most cases improvements to those indicators, e.g. migratory fish in the EU Water Framework Directive (WFD), EU Eel Recovery Plan and the UK and River Basin District (RBD) 8

of all the tributaries draining into it, including the freshwater Thames) is included in the South East Marine Plan area, which further requires substantial cross-boundary planning.

Migratory fish do not heed administrative boundaries Migratory fish do not heed administrative boundaries, moving between marine and terrestrial planning processes, and their habitat is relevant to both river basin planning and flood defence asset management. As a consequence there is a need to analyse the barriers to migration across the entire estuary system, which requires a strategic approach across multiple RBDs and their coastlines. This project seeks to address the current lack of an integrated approach and proposes to

FISH 130. Summer 2018  
FISH 130. Summer 2018