{"refrec":{"BRefID":285654,"RR":"Matondo, B.N.; Ovidio, M. (2016). Dynamics of upstream movements of the European eel Anguilla anguilla in an inland area of the River Meuse over the last 20 years. Environ. Biol. Fish. 99(2-3): 223-235. https://dx.doi.org/10.1007/s10641-016-0469-x","BEntID":277679,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":0,"RefStringPartII":". Environ. Biol. Fish. 99(2-3): 223-235. https://dx.doi.org/10.1007/s10641-016-0469-x","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":1,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Matondo, B.N.; Ovidio, M.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Matondo, B.N.; Ovidio, M.","Englishabstract":"The dynamics of upstream movements of the yellow eel Anguilla anguilla were investigated at Lixhe on the Belgian River Meuse in an inland fish pass regularly monitored from 1992 to 2014. Based on a constant year-to-year sampling effort, we examined the abundance of ascending yellow eels and their body size, seasonal movement, and the associated water temperature and flow. Over the last 23 years, the number of ascending yellow eels has declined at an average 4.2 % per year since 1992. The abundance of eels in 2014 is estimated at 4.5 % of the ascending stock in 1992. We observed that some annual variations in eel abundance at Lixhe might be related to opening fish passes downstream of the study site. The results clearly demonstrated that long-term declining abundance of eels has resulted in increased sizes (mean increase, 4.1 mm per year since 1992) and temperatures triggering the upstream movement process (1.03 °C per decade), with earlier dates for the last eel passages reducing the difference between temperature extremes of eel passages through the fish pass during the migration season. Eel movements occurred in spring and summer at low river discharge and were mainly triggered by high-temperature events. Eels have become larger with time because of improved feeding opportunities and more growth habitats available resulting from the long-term reduction in recruitment. This study highlights the importance of investigating long time spans for a better comprehension of the changes observed in yellow eels and for the optimization of management measures and future research.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Dynamics of upstream movements of the European eel Anguilla anguilla in an inland area of the River Meuse over the last 20 years","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-06-06 01:33:34.235893","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Abundance; Season; Migration; Yellow eel; Freshwater","OtherDescriptors":null,"Notes":null,"AnaPub":2016,"MonPub":null,"DateUpdate":"2022-05-03","DateCreate":"2017-05-16","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000374671000006","VABBcode":null,"OpenAcc":0,"DOI":"10.1007/s10641-016-0469-x"},"refs":null,"anarec":{"AnaID":285654,"PubliDate":2016,"Pagination":"223-235","XtraPublOfAnaID":null,"ISBN":null,"Volume":"99","Issue":"2-3","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":42826,"SerRR":"Environmental Biology of Fishes. Junk: The Hague. ISSN 0378-1909; e-ISSN 1573-5133","StandardTitleSer":"Environmental Biology of Fishes","ISSN":"0378-1909","AbbrevSer":"Environ. Biol. Fish.","StandardTitleMon":null,"StartPage":223,"Pages":13,"ToPubliDate":null,"BRefBibLvlCode":"S","SerNotes":null},"monrec":null,"serrec":null,"relations":null,"relationsRev":null,"addrec":null,"othpubs":null,"ownerships":null,"authors":[{"AutName":"Matondo","Firstname":"Billy Nzau","Initials":"B.N.","Affiliation":"Department of Biology, Ecology and Evolution, Applied and Fundamental Fish Research Center. Biology of Behaviour Unit, Laboratory of Fish Demography and Hydroecology, University of Liège","Discriminator":null,"CorporateFlag":0,"BEntID":277679,"AutID":257378,"OrderNr":1,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":"UGERAA","InsFSN":"Université de Liège; Faculté des Sciences; Département de Biologie, Ecologie et Evolution; Unité de Gestion des Ressources Aquatiques et Aquaculture","ORCID":"0000-0002-7098-9972","PersID":34093,"InsID":3903},{"AutName":"Ovidio","Firstname":"Michaël","Initials":"M.","Affiliation":"Department of Biology, Ecology and Evolution, Applied and Fundamental Fish Research Center. Biology of Behaviour Unit, Laboratory of Fish Demography and Hydroecology, University of Liège","Discriminator":null,"CorporateFlag":0,"BEntID":277679,"AutID":257379,"OrderNr":2,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":"UGERAA","InsFSN":"Université de Liège; Faculté des Sciences; Département de Biologie, Ecologie et Evolution; Unité de Gestion des Ressources Aquatiques et Aquaculture","ORCID":"0000-0002-0136-5840","PersID":34092,"InsID":3903}],"mapdetails":null,"datasets":null,"monographs":null,"monparts":null,"serparts":null,"BEntOpen":null,"BEntPrivate":null,"availability":[{"BInstID":376436,"LibID":36,"BRefID":285654,"EmbargoDate":null,"FullEmbargoDate":null,"PhysMedID":16,"hasOCRd":null,"ShelfLocCode":"376436","RFID":null,"PaidValue":null,"Medium":"Server","Description":"Interne VLIZ documenten","Acronym":"VLIZ","Library":"Vlaams Instituut voor de Zee","DutchTerm":"Non-open access","URL":null,"ClassifID":228,"Classification":"Non-open access","ReqLink":1,"ClassifTypID":3,"URLLocation":"https://www.vliz.be/imisdocs/publications/","SubDir":1,"InternalReq":1,"LoggedInReq":1,"Disclaimer":"Disclaimer_VLIZ_Intern","DutchDisclaimer":"
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