{"id":"https://openalex.org/W2076049544","doi":"https://doi.org/10.1080/10256010108033296","title":"Stable Isotopes in Animal Ecology: The Effect of Ration Size on the Trophic Shift of C and N Isotopes Between Feed and Carcass","display_name":"Stable Isotopes in Animal Ecology: The Effect of Ration Size on the Trophic Shift of C and N Isotopes Between Feed and Carcass","publication_year":2001,"publication_date":"2001-11-01","ids":{"openalex":"https://openalex.org/W2076049544","doi":"https://doi.org/10.1080/10256010108033296","mag":"2076049544","pmid":"https://pubmed.ncbi.nlm.nih.gov/11924851"},"language":"en","primary_location":{"id":"doi:10.1080/10256010108033296","doi":"https://doi.org/10.1080/10256010108033296","is_oa":false,"landing_page_url":"https://doi.org/10.1080/10256010108033296","pdf_url":null,"source":{"id":"https://openalex.org/S77847288","display_name":"Isotopes in Environmental and Health Studies","issn_l":"1025-6016","issn":["1025-6016","1477-2639"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","dongbi-c","jufo-1","medline","norway-1","poland-40","russia-white-list-3"],"host_organization":"https://openalex.org/P4310320547","host_organization_name":"Taylor & Francis","host_organization_lineage":["https://openalex.org/P4310320547","https://openalex.org/P4310320449"],"host_organization_lineage_names":["Taylor & Francis","Informa"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Isotopes in Environmental and Health Studies","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref","pubmed"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5007252069","display_name":"Ulfert Focken","orcid":"https://orcid.org/0000-0002-8422-3943","observed_orcids":["https://orcid.org/0000-0002-8422-3943"]},"institutions":[{"id":"https://openalex.org/I110079840","display_name":"University of Hohenheim","ror":"https://ror.org/00b1c9541","country_code":"DE","type":"education","lineage":["https://openalex.org/I110079840"]}],"countries":["DE"],"is_corresponding":true,"raw_author_name":"U. Focken","raw_affiliation_strings":["Department of Animal Nutrition and Aquaculture in the Tropics and Subtropics, Hohenheim University, Stuttgart, Germany. focken@uni-hohenheim.de"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Animal Nutrition and Aquaculture in the Tropics and Subtropics, Hohenheim University, Stuttgart, Germany. focken@uni-hohenheim.de","institution_ids":["https://openalex.org/I110079840"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5007252069"],"corresponding_institution_ids":["https://openalex.org/I110079840"],"apc_list":null,"apc_paid":null,"fwci":3.2845,"has_fulltext":false,"cited_by_count":72,"citation_normalized_percentile":{"value":0.91062161,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":88,"max":98},"biblio":{"volume":"37","issue":"3","first_page":"199","last_page":"211"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T12073","display_name":"Isotope Analysis in Ecology","score":1.0,"subfield":{"id":"https://openalex.org/subfields/2303","display_name":"Ecology"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T12073","display_name":"Isotope Analysis in Ecology","score":1.0,"subfield":{"id":"https://openalex.org/subfields/2303","display_name":"Ecology"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10087","display_name":"Archaeology and ancient environmental studies","score":0.0,"subfield":{"id":"https://openalex.org/subfields/3302","display_name":"Archeology"},"field":{"id":"https://openalex.org/fields/33","display_name":"Social Sciences"},"domain":{"id":"https://openalex.org/domains/2","display_name":"Social Sciences"}},{"id":"https://openalex.org/T10230","display_name":"Marine and fisheries research","score":0.0,"subfield":{"id":"https://openalex.org/subfields/1104","display_name":"Aquatic Science"},"field":{"id":"https://openalex.org/fields/11","display_name":"Agricultural and Biological Sciences"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/stable-isotopes","display_name":"stable isotopes","score":0.7450000047683716},{"id":"https://openalex.org/keywords/trophic-shifts","display_name":"trophic changes","score":0.9340000152587891},{"id":"https://openalex.org/keywords/feeding-level","display_name":"feeding level","score":0.671999990940094},{"id":"https://openalex.org/keywords/oreochromis-niloticus","display_name":"Oreochromis niloticus","score":0.996999979019165},{"id":"https://openalex.org/keywords/carbon-isotopes","display_name":"carbon isotopes","score":0.8109999895095825},{"id":"https://openalex.org/keywords/nitrogen-isotopes","display_name":"nitrogen isotopes","score":1.0},{"id":"https://openalex.org/keywords/lipid-fractions","display_name":"lipid fractions","score":0.578000009059906},{"id":"https://openalex.org/keywords/dietary-reconstruction","display_name":"diet reconstruction","score":0.47200000286102295}],"concepts":[{"id":"https://openalex.org/C72958200","wikidata":"https://www.wikidata.org/wiki/Q1053008","display_name":"Trophic level","level":2,"score":0.9391239881515503},{"id":"https://openalex.org/C2780129523","wikidata":"https://www.wikidata.org/wiki/Q311170","display_name":"Nile tilapia","level":4,"score":0.7669534087181091},{"id":"https://openalex.org/C2778658382","wikidata":"https://www.wikidata.org/wiki/Q4621959","display_name":"Oreochromis","level":3,"score":0.6886022090911865},{"id":"https://openalex.org/C156398188","wikidata":"https://www.wikidata.org/wiki/Q3278929","display_name":"\u03b413C","level":3,"score":0.6174017786979675},{"id":"https://openalex.org/C99649442","wikidata":"https://www.wikidata.org/wiki/Q470479","display_name":"Isotopes of nitrogen","level":3,"score":0.6056840419769287},{"id":"https://openalex.org/C2780401108","wikidata":"https://www.wikidata.org/wiki/Q8083977","display_name":"\u03b415N","level":4,"score":0.587590217590332},{"id":"https://openalex.org/C51813073","wikidata":"https://www.wikidata.org/wiki/Q518459","display_name":"Isotope analysis","level":2,"score":0.5427191257476807},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.5228146314620972},{"id":"https://openalex.org/C22117777","wikidata":"https://www.wikidata.org/wiki/Q17148629","display_name":"Stable isotope ratio","level":2,"score":0.5131934285163879},{"id":"https://openalex.org/C185059815","wikidata":"https://www.wikidata.org/wiki/Q471790","display_name":"Isotopes of carbon","level":3,"score":0.4950479567050934},{"id":"https://openalex.org/C140793950","wikidata":"https://www.wikidata.org/wiki/Q168091","display_name":"Animal science","level":1,"score":0.48773178458213806},{"id":"https://openalex.org/C18903297","wikidata":"https://www.wikidata.org/wiki/Q7150","display_name":"Ecology","level":1,"score":0.46972525119781494},{"id":"https://openalex.org/C164304813","wikidata":"https://www.wikidata.org/wiki/Q25276","display_name":"Isotope","level":2,"score":0.4375937283039093},{"id":"https://openalex.org/C537208039","wikidata":"https://www.wikidata.org/wiki/Q627","display_name":"Nitrogen","level":2,"score":0.3947164714336395},{"id":"https://openalex.org/C2909208804","wikidata":"https://www.wikidata.org/wiki/Q127282","display_name":"Fish <Actinopterygii>","level":2,"score":0.37156522274017334},{"id":"https://openalex.org/C185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","level":0,"score":0.30954688787460327},{"id":"https://openalex.org/C505870484","wikidata":"https://www.wikidata.org/wiki/Q180538","display_name":"Fishery","level":1,"score":0.24095368385314941},{"id":"https://openalex.org/C158787203","wikidata":"https://www.wikidata.org/wiki/Q900291","display_name":"Total organic carbon","level":2,"score":0.07783669233322144},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.0},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.0},{"id":"https://openalex.org/C178790620","wikidata":"https://www.wikidata.org/wiki/Q11351","display_name":"Organic chemistry","level":1,"score":0.0}],"mesh":[{"descriptor_ui":"D000818","descriptor_name":"Animals","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D002247","descriptor_name":"Carbon Isotopes","qualifier_ui":"Q000032","qualifier_name":"analysis","is_major_topic":false},{"descriptor_ui":"D002247","descriptor_name":"Carbon Isotopes","qualifier_ui":"Q000493","qualifier_name":"pharmacokinetics","is_major_topic":false},{"descriptor_ui":"D004032","descriptor_name":"Diet","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D004784","descriptor_name":"Environmental Monitoring","qualifier_ui":"Q000379","qualifier_name":"methods","is_major_topic":false},{"descriptor_ui":"D009587","descriptor_name":"Nitrogen Isotopes","qualifier_ui":"Q000032","qualifier_name":"analysis","is_major_topic":false},{"descriptor_ui":"D009587","descriptor_name":"Nitrogen Isotopes","qualifier_ui":"Q000493","qualifier_name":"pharmacokinetics","is_major_topic":false},{"descriptor_ui":"D014018","descriptor_name":"Tissue Distribution","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D017210","descriptor_name":"Tilapia","qualifier_ui":"Q000502","qualifier_name":"physiology","is_major_topic":true},{"descriptor_ui":"D020387","descriptor_name":"Food Chain","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true}],"locations_count":3,"locations":[{"id":"doi:10.1080/10256010108033296","doi":"https://doi.org/10.1080/10256010108033296","is_oa":false,"landing_page_url":"https://doi.org/10.1080/10256010108033296","pdf_url":null,"source":{"id":"https://openalex.org/S77847288","display_name":"Isotopes in Environmental and Health Studies","issn_l":"1025-6016","issn":["1025-6016","1477-2639"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","dongbi-c","jufo-1","medline","norway-1","poland-40","russia-white-list-3"],"host_organization":"https://openalex.org/P4310320547","host_organization_name":"Taylor & Francis","host_organization_lineage":["https://openalex.org/P4310320547","https://openalex.org/P4310320449"],"host_organization_lineage_names":["Taylor & Francis","Informa"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Isotopes in Environmental and Health Studies","raw_type":"journal-article"},{"id":"pmid:11924851","doi":null,"is_oa":false,"landing_page_url":"https://pubmed.ncbi.nlm.nih.gov/11924851","pdf_url":null,"source":{"id":"https://openalex.org/S4306525036","display_name":"PubMed","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I1299303238","host_organization_name":"National Institutes of Health","host_organization_lineage":["https://openalex.org/I1299303238"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Isotopes in environmental and health studies","raw_type":"Journal Article"},{"id":"pmh:oai:www.openagrar.de:timport_mods_00016202","doi":null,"is_oa":false,"landing_page_url":"https://www.openagrar.de/receive/timport_mods_00016202","pdf_url":null,"source":{"id":"https://openalex.org/S7407055137","display_name":"OpenAgrar","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"article"}],"best_oa_location":null,"sustainable_development_goals":[{"score":0.5666999816894531,"id":"https://metadata.un.org/sdg/2","display_name":"Zero hunger"}],"study_designs":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":18,"referenced_works":["https://openalex.org/W90239176","https://openalex.org/W1582488947","https://openalex.org/W1971217334","https://openalex.org/W1974353270","https://openalex.org/W1983874139","https://openalex.org/W2010925922","https://openalex.org/W2015143898","https://openalex.org/W2054051682","https://openalex.org/W2081604939","https://openalex.org/W2084806603","https://openalex.org/W2085550021","https://openalex.org/W2091699432","https://openalex.org/W2156318036","https://openalex.org/W2166477196","https://openalex.org/W2171510164","https://openalex.org/W2314722037","https://openalex.org/W2462213177","https://openalex.org/W4255743098"],"related_works":["https://openalex.org/W2041965290","https://openalex.org/W2013424998","https://openalex.org/W2155009193","https://openalex.org/W2076907887","https://openalex.org/W1978855106","https://openalex.org/W1975175762","https://openalex.org/W1991829422","https://openalex.org/W2046417766","https://openalex.org/W3087667757","https://openalex.org/W2027068930"],"abstract_inverted_index":{"The":[0,108,137],"feeding":[1,60,144,170,189],"ecology":[2],"of":[3,15,22,47,58,111,126,152,188,197,207],"living":[4],"or":[5,24,29],"extinct":[6],"animal":[7,199],"species":[8],"is":[9,50,179],"now":[10],"frequently":[11],"studied":[12],"by":[13],"analysis":[14],"stable":[16],"isotope":[17],"ratios":[18,110,151,206],"in":[19,39,74,115,123,172,209],"small":[20],"quantities":[21],"carcass":[23],"remains":[25],"such":[26],"as":[27],"bones":[28],"teeth.":[30],"Although":[31,176],"there":[32],"are":[33],"numerous":[34],"papers":[35],"on":[36,62],"these":[37],"applications":[38],"natural":[40],"systems,":[41],"the":[42,56,63,124,147,165,186,195,205],"theoretical":[43],"and":[44,65,113,117,122,134,149,154],"experimental":[45],"basis":[46],"this":[48,128],"method":[49],"weak.":[51],"In":[52],"order":[53],"to":[54,97,201],"evaluate":[55],"effect":[57,187],"different":[59],"levels":[61,92],"carbon":[64,112,127],"nitrogen":[66,114],"trophic":[67,138,166],"shift,":[68],"an":[69,198],"experiment":[70],"was":[71,129,140,157],"carried":[72],"out":[73],"which":[75],"fish":[76,104,118],"(Nile":[77],"tilapia,":[78],"Oreochromis":[79],"niloticus,":[80],"initial":[81],"weight":[82],"40.8":[83],"g)":[84],"were":[85,105,120],"fed":[86],"for":[87,132,164],"4":[88],"weeks":[89],"at":[90,142,168],"three":[91,103],"from":[93,146,204],"slightly":[94],"above":[95],"maintenance":[96],"almost":[98],"satiation.":[99],"For":[100],"each":[101,143],"treatment,":[102],"reared":[106],"individually.":[107],"isotopic":[109],"feeds":[116],"carcasses":[119],"determined":[121],"case":[125],"done":[130],"separately":[131],"lipids":[133],"lipid-free":[135],"matter.":[136],"shift":[139,167],"calculated":[141,203],"level":[145,190],"delta13C":[148],"delta15N":[150],"feed":[153],"fish.":[155],"There":[156],"a":[158],"significant":[159],"trend":[160],"towards":[161],"higher":[162,169],"values":[163],"rates":[171],"all":[173],"fractions":[174],"analysed.":[175],"further":[177],"research":[178],"required,":[180],"it":[181],"can":[182],"be":[183,192,202],"concluded":[184],"that":[185],"cannot":[191],"ignored":[193],"when":[194],"diet":[196],"has":[200],"isotopes":[208],"its":[210],"body.":[211]},"counts_by_year":[{"year":2025,"cited_by_count":2},{"year":2023,"cited_by_count":4},{"year":2021,"cited_by_count":2},{"year":2019,"cited_by_count":1},{"year":2018,"cited_by_count":5},{"year":2017,"cited_by_count":3},{"year":2015,"cited_by_count":5},{"year":2014,"cited_by_count":1},{"year":2013,"cited_by_count":5},{"year":2012,"cited_by_count":5}],"updated_date":"2026-11-10T11:39:43.021295","created_date":"2016-06-24T00:00:00"}
