{"refrec":{"BRefID":14293,"RR":"Spaargaren, D.H. (1982). The ammonium excretion of the shore crab, Carcinus maenas, in relation to environmental osmotic conditions. Neth. J. Sea Res. 15(2): 273-283","BEntID":14293,"PublicFlag":1,"CheckedFlag":0,"wosflag":0,"vabbflag":0,"RefStringPartII":". Neth. J. Sea Res. 15(2): 273-283","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Spaargaren, D.H.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Spaargaren, D.H.","Englishabstract":"Ammonia concentrations were measured in blood and external media of shore crabs, Carcinus maenas, acclimated to 6 different salinities at high (20°C) and low (4°C) temperaturtes. It is seen that environmental osmotic conditions (temperature and salinity) have a major influence on NH+4 formation and thus on protein (amino acid) catabolism. Blood ammonia concentrations appear to be strongly stabilized, independent of environmental osmotic conditions, ranging between 0,25 and 0,55 mmol.l-1. At normal, low environmental NH+4 concentrations blood NH+4 is strongly hyper-ionic compared to external concentrations; at high environmental NH+4 concentrations (even when artificially raised to 2,5 mmol.l-1) blood NH+4 is strongly hypo-ionic. Regulation of the blood NH+4 concentrations takes place by a variable efflux of NH+4; at high environmental NH+4 concentrations (>0,28 mmol.l-1), in addition to a high NH+4 efflux, stabilization of the blood NH+4 concentrations is effectuated by the formation of urea. Ammonia efflux to the surrounding water is highly dependent to the osmotic conditions of the environment: viz. positively related to temperature and inversely related to external salinity, with variable stable values near the osmotic salinity. Related to the strong variations in ammonia efflux, external NH+4 concentrations in a closed volume of water are highly variable. In the course of time very high values develop in media of low salinity at high temperature. A close connection between NH+4 excretion and extracellular ion regulation is indicated.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"The ammonium excretion of the shore crab, Carcinus maenas, in relation to environmental osmotic conditions","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":1982,"MonPub":null,"DateUpdate":"2019-07-04","DateCreate":"2001-07-30","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":0},"refs":null,"anarec":{"AnaID":14293,"PubliDate":1982,"Pagination":"273-283","XtraPublOfAnaID":null,"ISBN":null,"Volume":"15","Issue":"2","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":44573,"SerRR":"Netherlands Journal of Sea Research. Netherlands Institute for Sea Research (NIOZ): Groningen; Den Burg. ISSN 0077-7579; e-ISSN 1873-1406","StandardTitleSer":"Netherlands Journal of Sea Research","ISSN":"0077-7579","AbbrevSer":"Neth. J. Sea Res.","StandardTitleMon":null,"StartPage":273,"Pages":11,"ToPubliDate":null,"BRefBibLvlCode":"S","SerNotes":null},"monrec":null,"serrec":null,"relations":null,"relationsRev":null,"addrec":null,"othpubs":null,"ownerships":null,"authors":[{"AutName":"Spaargaren","Firstname":null,"Initials":"D.H.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":14293,"AutID":16807,"OrderNr":1,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null}],"mapdetails":null,"datasets":null,"monographs":null,"monparts":null,"serparts":null,"BEntOpen":null,"BEntPrivate":null,"availability":[{"BInstID":332189,"LibID":36,"BRefID":14293,"EmbargoDate":null,"FullEmbargoDate":null,"PhysMedID":16,"hasOCRd":null,"ShelfLocCode":"332189","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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