{"projectrec":{"ProID":4964,"StandardTitle":"Escapement of silver eels from the Grand-Lieu Lake to the sea","OrigTitle":null,"Acronym":"ESGL","AbstractEnglish":"\"Current knowledge about the downstream migration of sexually mature European eels\n(Anguilla anguilla) remains incomplete, particularly in still water habitats such as lakes\nand wetlands subject to water level management. However, for the management of\nthis endangered species, it is important to understand migration dynamics, and contribution to the breeding stock. This study aimed to assess the parameters that trigger\nand guide the migration of silver eels in the largest floodplain lake and associated\nwetlands in France (the sluice regulated Grand-Lieu Lake). A telemetry survey of 50\nacoustic and PIT-tagged female silver eels was performed during the 2015–2016 migration period. We deployed a novel telemetric approach, using receivers to delimit\nseveral restricted virtual boxes to determine the instantaneous location of individuals\nand to transform simple discrete telemetric data into presence/absence data. The low\nnumbers leaving the lake centre are probably explained by the lack of orienting water\nflows or other environmental clues, but whilst the fate of 34% (17/50) of the tagged\neels is unknown, 18% (9/50) were caught by commercial fishermen. Modelling showed\nthat detections were not clearly associated with environmental factors typically involved in riverine migrations (e.g. current velocity, atmospheric pressure and temperature) but they were particularly associated with higher and increasing water levels and,\nfor eels exiting the lake, a sharp increase when sluice gates were opened to an effective gap of >75 cm. It is concluded that management of water levels and sluice gate\nopening during the migration period might aid escapement of silver eels.\"","AbstractOtherLang":null,"DateLastModified":{"date":"2023-05-02 10:09:39.823000","timezone_type":1,"timezone":"+00:00"},"ParentProID":null,"BeginYear":2015,"EndYear":2016,"BMonth":null,"EMonth":null,"BeginMonth":null,"EndMonth":null,"OrigTitleLangCode":null,"OrigTitleLangID":null,"OrigTitleLangNL":null,"OrigTitleLang":null,"OtherAbstractLangCode":null,"OtherAbstractLangID":null,"OtherAbstractLang":null,"OtherAbstractLangNL":null,"Progress":"Completed","ProgressNL":"Afgelopen","PublicFlag":1,"CheckedFlag":0,"ND":"2019-06-17","UD":"2019-06-17","DMPFlag":0,"Budget":null,"BudgetCurrency":"EUR"},"parent":null,"persons":null,"projects":null,"events":null,"datasets":null,"institutes":[{"instituterec":{"Acronym":"MNHN","ProPartID":16703,"PublicFlag":1,"OrigNameLangCode":"fr","OrigNameLangID":22,"FullOrigName":"Muséum National d'Histoire Naturelle","Line1":"Jardin des Plantes","Line2":" 57 Rue Cuvier","Line3":"75005 Paris","Line4":null,"InsID":4397,"FullStandardName":"National Natural History Museum Paris","Role":null,"RoleID":null,"EncAddress":"Jardin des Plantes,  57 Rue Cuvier, 75005 Paris, France"},"parent":null,"institutes":null,"references":null,"conferences":null,"datasets":null,"persons":[{"Surname":"Acou","Firstname":"Anthony","Initials":"A.","LeaderFlag":0,"PersID":37825,"Role":null,"RoleID":null,"PastInstitute":0,"BeginDay":null,"BeginMonth":null,"BeginYear":null,"EndDay":null,"EndMonth":null,"EndYear":null},{"Surname":"Trancart","Firstname":"Thomas","Initials":"T.","LeaderFlag":0,"PersID":37824,"Role":null,"RoleID":null,"PastInstitute":0,"BeginDay":null,"BeginMonth":null,"BeginYear":null,"EndDay":null,"EndMonth":null,"EndYear":null},{"Surname":"Feunteun","Firstname":"Eric","Initials":"E.","LeaderFlag":0,"PersID":18936,"Role":null,"RoleID":null,"PastInstitute":0,"BeginDay":null,"BeginMonth":null,"BeginYear":null,"EndDay":null,"EndMonth":null,"EndYear":null}],"pastpers":null,"subpers":null,"projects":null,"urls":null,"pictures":null,"published":null,"affrefs":null,"collections":null,"thesterms":null,"taxterms":null,"geoterms":null,"thestermsFRIS":null,"nXtins":null,"previns":null,"spcols":null,"resmessage":"no id specified","complete":0,"participantrec":null,"peerrevs":null,"urlmaps":null}],"refs":null,"urls":null,"thesterms":null,"taxterms":null,"geoterms":null,"funderids":null,"othtermsFRIS":null,"pictures":[],"spcols":null,"resmessage":"","complete":1}