{"refrec":{"BRefID":33852,"RR":"<b>Hostens, K.</b> (2003). Fish and macro-crustacean response surfaces to environmental gradients in the Westerschelde estuary, <b><i>in</i></b>: Hostens, K. <i>The demersal fish and macro-invertebrate assemblages of the Westerschelde and Oosterschelde estuaries (Southern Bight of the North Sea) = De demersale vis- en macro-invertebraten gemeenschappen van de Westerschelde en Oosterschelde estuaria (Zuidelijke Bocht van de Noordzee).</i> pp. 105-116","BEntID":33852,"PublicFlag":1,"CheckedFlag":0,"wosflag":null,"vabbflag":null,"RefStringPartII":", <b><i>in</i></b>: Hostens, K. <i>The demersal fish and macro-invertebrate assemblages of the Westerschelde and Oosterschelde estuaries (Southern Bight of the North Sea) = De demersale vis- en macro-invertebraten gemeenschappen van de Westerschelde en Oosterschelde estuaria (Zuidelijke Bocht van de Noordzee).</i> pp. 105-116","DocTypID":17,"DocType":"Book chapters","MarineFlag":1,"FreshFlag":0,"BrackishFlag":1,"TerrestrialFlag":0,"Authorstring":"Hostens, K.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Hostens, K.","Englishabstract":"Juvenile fish and macro-crustaceans of the Westerschelde were intensively sampled with a 3-metre beam trawl in the periods 1988-91 and 1999-2001. Models were developed to predict the occurrence and density of the 15 commonest species in response to a limited set of environmental variables. Single logistic regressions yielded good descriptions of the occurrence of any one species along one environmental gradient. This was related to the maximum likelihood of presence in the field, although several species showed a broad tolerance to- wards one or more of the 4 environmental variables used. The response curves should only be interpreted as actual distribution patterns of juvenile fish and macro-crustaceans as a function of the four environmental variables. Multiple logistic regressions and normal regressions gave insight into the relative importance of each environmental variable for every single species. AII response surfaces, either based on presence/ absence or on density data, were highly significant when combining data on temperature, salinity, turbidity, dissolved oxygen concentration and for their quadratic effects. The addition of other, extrapolated variables (current velocity, mysid prey density, chlorophyll a or suspended particulate matter) did not improve the predictions. For most species the prediction of presence/ absence was relatively successful (60-9(J % correct I y predicted). Sensitivity (% present predicted as present) and specificity (% absent predicted as absent) were equally high in most models, and validation proved the models to be accurate and robust. The models that predicted density patterns could only explain between 20-55% of the variance. Best 'density' models were built for those species that were present in the estuary during a longer period with only one clear density peak, i.e. <i>Limanda limanda, Pomatoschistus microps, Carcinus maenas, Liocarcinus holsatus, Platichthys jlesus, Sprattus sprattus</i> and <i>Pomatoschistus minutus</i>. The least models concerned species belonging to the ecological guild of 'marine juveniles ' (e. g. <i>Trisopterus luscus, Merlangius merlangus, Clupea harengus, Solea solea</i> and <i>Pleuronectes platessa</i>). Also, the 'density' models for <i>Crangon crangon, Syngnathus rostellatus</i> and <i>Pomatoschistus lozanoi</i> were less successful. Temperature (and dissolved oxygen concentration) mainly reflected seasonal effects, while salinity and turbidity reflected spatial effects. Still, it is argued that the interaction between several environmental variables (e.g. temperature and salinity) was even more important in predicting species occurrence and density.","AbstractOtherLang":null,"BibLvlCode":"AM","StandardTitle":"Fish and macro-crustacean response surfaces to environmental gradients in the Westerschelde estuary","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2025-07-02 08:33:14.980000","timezone_type":1,"timezone":"+00:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":"Logistic regression; shrimp, crab","Notes":null,"AnaPub":2003,"MonPub":null,"DateUpdate":"2015-12-09","DateCreate":"2003-04-03","SecASFANote":null,"ConfID":null,"PeerRev":0,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":1},"refs":null,"anarec":{"AnaID":33852,"PubliDate":2003,"Pagination":"105-116","XtraPublOfAnaID":null,"ISBN":null,"Volume":null,"Issue":null,"BRefMon":33839,"BRefMonRR":"<b>Hostens, K.</b> (2003). The demersal fish and macro-invertebrate assemblages of the Westerschelde and Oosterschelde estuaries (Southern Bight of the North Sea) = De demersale vis- en macro-invertebraten gemeenschappen van de Westerschelde en Oosterschelde estuaria (Zuidelijke Bocht van de Noordzee). PhD Thesis. Universiteit Gent. Faculteit Wetenschappen: Gent.  XVI, 205, 1 cd-rom pp.","BRefXtra":null,"BRefXtraRR":null,"SerBRefID":null,"SerRR":null,"StandardTitleSer":null,"ISSN":null,"AbbrevSer":null,"StandardTitleMon":"The demersal fish and macro-invertebrate assemblages of the Westerschelde and Oosterschelde estuaries (Southern Bight of the North Sea) = De demersale vis- en macro-invertebraten gemeenschappen van de Westerschelde en Oosterschelde estuaria (Zuidelijke Bocht van de Noordzee)","StartPage":105,"Pages":12,"ToPubliDate":null,"BRefBibLvlCode":"M","SerNotes":null,"AutString":"Hostens, K."},"monrec":null,"serrec":null,"relations":null,"relationsRev":null,"addrec":{"Line1":"Krijgslaan 281/S8","Email":null,"Line2":null,"EnvName":"Belgium"},"othpubs":null,"ownerships":null,"authors":[{"AutName":"Hostens","Firstname":"Kris","Initials":"K.","Affiliation":"Marine Biology, Ghent University","Discriminator":null,"CorporateFlag":0,"BEntID":33852,"AutID":177385,"OrderNr":1,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":"MARBIOL","InsFSN":"Universiteit Gent; Faculteit Wetenschappen; Vakgroep Biologie; Onderzoeksgroep Mariene Biologie","ORCID":"0000-0002-8476-1362","PersID":226,"InsID":13}],"mapdetails":null,"datasets":null,"monographs":null,"monparts":null,"serparts":null,"BEntOpen":null,"BEntPrivate":null,"availability":[{"BInstID":281953,"LibID":36,"BRefID":33852,"EmbargoDate":null,"FullEmbargoDate":null,"PhysMedID":16,"hasOCRd":null,"ShelfLocCode":"281953","RFID":null,"PaidValue":null,"Medium":"Server","Description":"VLIZ Open Access","Acronym":"VLIZ","Library":"Vlaams Instituut voor de Zee","DutchTerm":"Open access","URL":null,"ClassifID":53,"Classification":"Open access","ReqLink":null,"ClassifTypID":1,"URLLocation":"https://www.vliz.be/imisdocs/publications/","SubDir":null,"InternalReq":0,"LoggedInReq":0,"Disclaimer":null,"DutchDisclaimer":null,"FileFormat":".pdf","FileDescr":"pdf","InsPub":1,"InsID":36,"FileFormID":6,"LendableFlag":1,"PublicFlag":1,"orderLib":"A","Notes":null,"AccConID":null,"AccessConstraint":null,"LicURL":null}],"litstyles":[{"LitStyID":7,"Style":"Dissertation"}],"thespers":null,"arch2discl":null,"SERpubls":null,"MONpubls":[{"PublName":"Universiteit Gent. Faculteit Wetenschappen","Place":"Gent"}],"pictures":[],"thestermsPath":[{"ThesaurusTerm":"ANE, Netherlands, Westerschelde","ThestID":182103,"Acronym":"ASFA_GEOT","ThesTermPath":"ANE, Netherlands, Westerschelde"},{"ThesaurusTerm":"Crabs","ThestID":64525,"Acronym":"CSA","ThesTermPath":"Crabs"},{"ThesaurusTerm":"Crabs","ThestID":96046,"Acronym":"TRT","ThesTermPath":"Crabs"},{"ThesaurusTerm":"Juveniles","ThestID":4526,"Acronym":"ASFA","ThesTermPath":"Developmental stages > Juveniles"},{"ThesaurusTerm":"Fish","ThestID":3141,"Acronym":"ASFA","ThesTermPath":"Fauna > Aquatic organisms > Aquatic animals > Fish"},{"ThesaurusTerm":"Shellfish","ThestID":7576,"Acronym":"ASFA","ThesTermPath":"Fauna > Aquatic organisms > Aquatic animals > Shellfish"},{"ThesaurusTerm":"Crabs","ThestID":129270,"Acronym":"CAB","ThesTermPath":"Invertebrates > Arthropods > Crustacea > Malacostraca > Decapoda > Shellfish > Crabs"},{"ThesaurusTerm":"Shrimps","ThestID":149861,"Acronym":"CAB","ThesTermPath":"Invertebrates > Arthropods > Crustacea > Malacostraca > Decapoda > Shellfish > Shrimps"},{"ThesaurusTerm":"Modelling","ThestID":5269,"Acronym":"ASFA","ThesTermPath":"Modelling"},{"ThesaurusTerm":"Shrimps","ThestID":74287,"Acronym":"CSA","ThesTermPath":"Shrimps"},{"ThesaurusTerm":"Spatial variations","ThestID":7855,"Acronym":"ASFA","ThesTermPath":"Spatial variations"},{"ThesaurusTerm":"Temporal variations","ThestID":8431,"Acronym":"ASFA","ThesTermPath":"Temporal variations"}],"thestermsASFA":[{"ThesaurusTerm":"ANE, Netherlands, Westerschelde"},{"ThesaurusTerm":"Crabs"},{"ThesaurusTerm":"Crabs"},{"ThesaurusTerm":"Crabs"},{"ThesaurusTerm":"Fish"},{"ThesaurusTerm":"Juveniles"},{"ThesaurusTerm":"Modelling"},{"ThesaurusTerm":"Shellfish"},{"ThesaurusTerm":"Shrimps"},{"ThesaurusTerm":"Shrimps"},{"ThesaurusTerm":"Spatial variations"},{"ThesaurusTerm":"Temporal variations"}],"taxtermsASFA":null,"geotermsASFA":[{"GeoTerm":"Westerschelde"}],"collections":[{"Collection":"OMA - Open Marien Archief","ShortName":"OMA"},{"Collection":"ScheldeMonitor","ShortName":"scheldemonitor"}],"conf":null,"proj":null,"Physdatasets":null,"spcols":{"222":{"SpName":"BMB - Belgische Mariene Bibliografie","SpColID":222,"ParSpColID":null,"TopParID":null,"ShortName":"BMB","URLLocation":null,"LibID":36,"OpenRepoFlag":null,"SpTypID":null,"TopParIDNotWebsite":null,"SpColPath":"BMB"},"49":{"SpName":"Fishery","SpColID":49,"ParSpColID":867,"TopParID":867,"ShortName":"Visserij","URLLocation":null,"LibID":null,"OpenRepoFlag":null,"SpTypID":null,"TopParIDNotWebsite":867,"SpColPath":"IMIS themes/Visserij"},"867":{"SpName":"IMIS themes","SpColID":867,"ParSpColID":null,"TopParID":null,"ShortName":"IMIS themes","URLLocation":null,"LibID":null,"OpenRepoFlag":null,"SpTypID":null,"TopParIDNotWebsite":null,"SpColPath":"IMIS themes"},"221":{"SpName":"OMA - Open Marien Archief","SpColID":221,"ParSpColID":null,"TopParID":null,"ShortName":"OMA","URLLocation":null,"LibID":36,"OpenRepoFlag":1,"SpTypID":null,"TopParIDNotWebsite":null,"SpColPath":"OMA"},"27":{"SpName":"ScheldeMonitor","SpColID":27,"ParSpColID":null,"TopParID":null,"ShortName":"scheldemonitor","URLLocation":null,"LibID":null,"OpenRepoFlag":null,"SpTypID":null,"TopParIDNotWebsite":null,"SpColPath":"scheldemonitor"},"422":{"SpName":"Section Marine Biology","SpColID":422,"ParSpColID":null,"TopParID":null,"ShortName":"MarBiol","URLLocation":null,"LibID":null,"OpenRepoFlag":null,"SpTypID":null,"TopParIDNotWebsite":null,"SpColPath":"MarBiol"},"641":{"SpName":"Species diversity","SpColID":641,"ParSpColID":867,"TopParID":867,"ShortName":"Diversiteit soorten","URLLocation":null,"LibID":null,"OpenRepoFlag":null,"SpTypID":null,"TopParIDNotWebsite":867,"SpColPath":"IMIS themes/Diversiteit soorten"},"664":{"SpName":"Species diversity: Benthos","SpColID":664,"ParSpColID":641,"TopParID":867,"ShortName":"Diversiteit soorten: Benthos","URLLocation":null,"LibID":null,"OpenRepoFlag":null,"SpTypID":null,"TopParIDNotWebsite":867,"SpColPath":"IMIS themes/Diversiteit soorten/Diversiteit soorten: Benthos"},"665":{"SpName":"Species diversity: Fish","SpColID":665,"ParSpColID":641,"TopParID":867,"ShortName":"Diversiteit soorten: Vissen","URLLocation":null,"LibID":null,"OpenRepoFlag":null,"SpTypID":null,"TopParIDNotWebsite":867,"SpColPath":"IMIS themes/Diversiteit soorten/Diversiteit soorten: Vissen"}},"doi":null,"publs":null,"serparttypes":null,"monauthors":[{"AutName":"Hostens","Initials":"K.","CorporateFlag":0,"BEntID":33839,"AutID":68745,"OrderNr":1,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"AutStrTrunc":"Hostens, K."}],"MParts":null,"SParts":null,"hLibs":null,"langs":[{"BEntID":33852,"AbstractFlag":-1,"LangID":15,"LangCode":"en","Lang":"English","DutchTerm":"Engels","LangCodeExtended":"eng"},{"BEntID":33852,"AbstractFlag":0,"LangID":15,"LangCode":"en","Lang":"English","DutchTerm":"Engels","LangCodeExtended":"eng"}],"urls":null,"thesterms":[{"ThesaurusTerm":"ANE, Netherlands, Westerschelde","ThestID":182103,"Acronym":"ASFA_GEOT","ThesTypID":34,"ThesType":"ASFA Geoterms"},{"ThesaurusTerm":"Crabs","ThestID":64525,"Acronym":"CSA","ThesTypID":2,"ThesType":"CSA Technology Research Database Master Thesaurus"},{"ThesaurusTerm":"Crabs","ThestID":96046,"Acronym":"TRT","ThesTypID":3,"ThesType":"Transportation Research Thesaurus"},{"ThesaurusTerm":"Crabs","ThestID":129270,"Acronym":"CAB","ThesTypID":4,"ThesType":"CAB Thesaurus"},{"ThesaurusTerm":"Fish","ThestID":3141,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Juveniles","ThestID":4526,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Modelling","ThestID":5269,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Shellfish","ThestID":7576,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Shrimps","ThestID":149861,"Acronym":"CAB","ThesTypID":4,"ThesType":"CAB Thesaurus"},{"ThesaurusTerm":"Shrimps","ThestID":74287,"Acronym":"CSA","ThesTypID":2,"ThesType":"CSA Technology Research Database Master Thesaurus"},{"ThesaurusTerm":"Spatial variations","ThestID":7855,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Temporal variations","ThestID":8431,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"}],"taxterms":null,"geoterms":[{"GeoTerm":"Westerschelde","GeoObjectID":4752,"GeotID":385}],"othterms":[{"OtherTerm":"Logistic regression","OthtID":3508}],"asfacodes":null,"asfa2codes":null,"thestermsFRIS":[{"ThesaurusTerm":"ANE, Netherlands, Westerschelde","DutchTerm":null,"ThestID":182103,"Acronym":"ASFA_GEOT","ThesTypID":34,"ThesType":"ASFA Geoterms"},{"ThesaurusTerm":"Crabs","DutchTerm":"Krabben","ThestID":64525,"Acronym":"CSA","ThesTypID":2,"ThesType":"CSA Technology Research Database Master Thesaurus"},{"ThesaurusTerm":"Crabs","DutchTerm":null,"ThestID":96046,"Acronym":"TRT","ThesTypID":3,"ThesType":"Transportation Research Thesaurus"},{"ThesaurusTerm":"Crabs","DutchTerm":null,"ThestID":129270,"Acronym":"CAB","ThesTypID":4,"ThesType":"CAB Thesaurus"},{"ThesaurusTerm":"Fish","DutchTerm":"Vis","ThestID":3141,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Juveniles","DutchTerm":"Juvenielen","ThestID":4526,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Modelling","DutchTerm":"Modellering","ThestID":5269,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Shellfish","DutchTerm":"Schaaldieren","ThestID":7576,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Shrimps","DutchTerm":null,"ThestID":149861,"Acronym":"CAB","ThesTypID":4,"ThesType":"CAB Thesaurus"},{"ThesaurusTerm":"Shrimps","DutchTerm":null,"ThestID":74287,"Acronym":"CSA","ThesTypID":2,"ThesType":"CSA Technology Research Database Master Thesaurus"},{"ThesaurusTerm":"Spatial variations","DutchTerm":"Ruimtelijk variaties","ThestID":7855,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Temporal variations","DutchTerm":"Temporele variatie","ThestID":8431,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"}],"taxtermsFRIS":null,"geotermsFRIS":[{"GeoTerm":"Westerschelde","DutchTerm":"Westerschelde"}],"othtermsFRIS":[{"OtherTerm":"Logistic regression","DutchTerm":null,"OthtID":3508}],"resmessage":"","complete":1,"sessions":{"newSesName":"Chisala, Chilekwa, C.","newSesDate":{"date":"2003-04-03 09:10:02.870000","timezone_type":3,"timezone":"Europe/Brussels"},"updSesName":"Bouchti, Zohra, Z.","updSesDate":{"date":"2015-12-09 10:11:30.453000","timezone_type":3,"timezone":"Europe/Brussels"}}}