German Eel Model (GEM II) for describing eel, Anguilla anguilla (L.), stock dynamics in the river Elbe system

• Main Authors: Oeberst, Rainer, Fladung, Erik
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2012
• Subjects: Biology; Fisheries; eel; Anguilla anguilla; stock model; river Elbe; silver eel
• Online Access: http://hdl.handle.net/1834/25302; https://doi.org/10.3220/Infn59_09-17_2012

The eel, Anguilla anguilla (L.), stock of the river Elbe severely decreased during the last decades. Detailed knowledge of the stock dynamics in freshwater and especially of the impact factors is necessary to take effective measures for stock conservation and improvement. The dynamics of the eel stock are modelled based on immigration, stocking, natural mortality and mortalities caused by fishing, angling, cormorants and hydropower plants. The model estimates the number of emigratingeel. Moreover, it enables to study the sensitivity of the estimates related to the uncertainty of the source data of the different influencing factors. The model may be used to develop management strategies and to assess the effi ciency of different management options.ZusammenfassungDer Aalbestand im Elbesystem ist in den letzten Jahrzehnten stark zur Johann Heinrich von Thünen-Institute, Federal Research Institute of Rural Areas, Forestry and Fisheries began publishing the Informationen aus der Fischereiforschung - Information on Fishery Research in 2010