| Summary: | DESCRIPTION The SUDOANG project aims at providing common tools to managers to support eelconservation in the SUDOE area (Spain, France and Portugal). VISUANG is theSUDOANG Interactive Web Application thathost all these tools . Theapplication consists of an eel distribution atlas (GT1), assessments ofmortalities caused by turbines and an atlas showing obstacles to migration (GT2), estimates of recruitment and exploitation rate (GT3) andescapement (chosen as a target by the EC for the Eel Management Plans) (GT4).In addition, it includes an interactive map showing sampling results fromthe pilot basin network produced by GT6. The eel abundance for the eel atlas and escapement has been obtained usingthe Eel Density Analysis model (EDA, GT4's product). EDA extrapolates theabundance of eel in sampled river segments to other segments taking intoaccount how the abundance, sex and size of the eels change depending ondifferent parameters. Thus, EDA requires two main data sources: those related to the river characteristics and those related to eel abundance and characteristics. However, in both cases, data availability was uneven in the SUDOE area. Inaddition, this information was dispersed among several managers and indifferent formats due to different sampling sources: Water Framework Directive(WFD), Community Framework for the Collection, Management and Use of Data inthe Fisheries Sector (EUMAP), Eel Management Plans, research groups, scientific papers and technical reports. Therefore, the first step towards having eelabundance estimations including the whole SUDOE area, was to have a joint riverand eel database. In this report we will describe the database correspondingto the river’s characteristics in the SUDOE area and the eel abundances andtheir characteristics. In the case of rivers, two types of information has been collected: River topology (RN table): a compilation of data on rivers and their topological and hydrographic characteristics in the three countries. River attributes (RNA table): contains physical ...
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