{"id":"https://openalex.org/W2081515840","doi":"https://doi.org/10.1017/s0021859600060536","title":"Estimation of the proportion of C3 and C4 plant species in the diet of animals from the ratio of natural 12C and 13C isotopes in the faeces","display_name":"Estimation of the proportion of C3 and C4 plant species in the diet of animals from the ratio of natural 12C and 13C isotopes in the faeces","publication_year":1979,"publication_date":"1979-02-01","ids":{"openalex":"https://openalex.org/W2081515840","doi":"https://doi.org/10.1017/s0021859600060536","mag":"2081515840"},"language":"en","primary_location":{"id":"doi:10.1017/s0021859600060536","doi":"https://doi.org/10.1017/s0021859600060536","is_oa":false,"landing_page_url":"https://doi.org/10.1017/s0021859600060536","pdf_url":null,"source":{"id":"https://openalex.org/S12429487","display_name":"The Journal of Agricultural Science","issn_l":"0021-8596","issn":["0021-8596","1469-5146"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-c","jufo-2","norway-1","poland-70","russia-white-list-1"],"host_organization":"https://openalex.org/P4310311721","host_organization_name":"Cambridge University Press","host_organization_lineage":["https://openalex.org/P4310311721","https://openalex.org/P4310311702"],"host_organization_lineage_names":["Cambridge University Press","University of Cambridge"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"The Journal of Agricultural Science","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref"],"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/A5103489415","display_name":"R. J. Jones","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"R. J. Jones","raw_affiliation_strings":["GSIRO Division of Tropical Crops and Pastures, Davies Laboratory, Private Mail Bag, Post Office, Townsville, Qld 4810"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"GSIRO Division of Tropical Crops and Pastures, Davies Laboratory, Private Mail Bag, Post Office, Townsville, Qld 4810","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5111711409","display_name":"Mervyn M. Ludlow","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I1292875679","display_name":"Commonwealth Scientific and Industrial Research Organisation","ror":"https://ror.org/03qn8fb07","country_code":"AU","type":"government","lineage":["https://openalex.org/I1292875679","https://openalex.org/I2801453606","https://openalex.org/I4387156119"]}],"countries":["AU"],"is_corresponding":false,"raw_author_name":"M. M. Ludlow","raw_affiliation_strings":["GSIRO Division of Tropical Crops and Pastures, Cunningham Laboratory, Mill Road, St Lucia, Qld. 4067"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"GSIRO Division of Tropical Crops and Pastures, Cunningham Laboratory, Mill Road, St Lucia, Qld. 4067","institution_ids":["https://openalex.org/I1292875679"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5005389052","display_name":"John H. Troughton","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"J. H. Troughton","raw_affiliation_strings":["DSIR Physics and Engineering Laboratory, Private Bag, Lower Hutt, New Zealand"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"DSIR Physics and Engineering Laboratory, Private Bag, Lower Hutt, New Zealand","institution_ids":[]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5048540355","display_name":"Conor Blunt","orcid":"https://orcid.org/0000-0002-9105-8974","observed_orcids":["https://orcid.org/0000-0002-9105-8974"]},"institutions":[{"id":"https://openalex.org/I1292875679","display_name":"Commonwealth Scientific and Industrial Research Organisation","ror":"https://ror.org/03qn8fb07","country_code":"AU","type":"government","lineage":["https://openalex.org/I1292875679","https://openalex.org/I2801453606","https://openalex.org/I4387156119"]}],"countries":["AU"],"is_corresponding":false,"raw_author_name":"C. G. Blunt","raw_affiliation_strings":["CSIRO Division of Tropical Crops and Pastures, Kimberley Research Station, Kununurra, Western Australia"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"CSIRO Division of Tropical Crops and Pastures, Kimberley Research Station, Kununurra, Western Australia","institution_ids":["https://openalex.org/I1292875679"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":{"value":3550,"currency":"USD","value_usd":3550},"apc_paid":null,"fwci":1.438,"has_fulltext":false,"cited_by_count":146,"citation_normalized_percentile":{"value":0.79608833,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":88,"max":99},"biblio":{"volume":"92","issue":"1","first_page":"91","last_page":"100"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T12073","display_name":"Isotope Analysis in Ecology","score":0.9824000000953674,"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":0.9824000000953674,"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/T10098","display_name":"Ruminant Nutrition and Digestive Physiology","score":0.013100000098347664,"subfield":{"id":"https://openalex.org/subfields/1103","display_name":"Animal Science and Zoology"},"field":{"id":"https://openalex.org/fields/11","display_name":"Agricultural and Biological Sciences"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T10087","display_name":"Archaeology and ancient environmental studies","score":0.0035000001080334187,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/carbon-isotope-ratio","display_name":"carbon isotope ratio","score":0.7049999833106995},{"id":"https://openalex.org/keywords/c3-and-c4-plants","display_name":"C3 and C4 plants","score":0.7979999780654907},{"id":"https://openalex.org/keywords/diet-analysis","display_name":"diet analysis","score":0.4659999907016754},{"id":"https://openalex.org/keywords/grazing-animals","display_name":"grazing animals","score":0.8019999861717224},{"id":"https://openalex.org/keywords/legume-intake","display_name":"legume consumption","score":0.6389999985694885},{"id":"https://openalex.org/keywords/tropical-grasses","display_name":"tropical grasses","score":0.8539999723434448},{"id":"https://openalex.org/keywords/feed-selection","display_name":"feed selection","score":0.48399999737739563},{"id":"https://openalex.org/keywords/in-vitro-organic-matter-digestibility","display_name":"in vitro organic matter digestibility","score":0.8339999914169312},{"id":"https://openalex.org/keywords/rabbits","display_name":"rabbits","score":0.5180000066757202},{"id":"https://openalex.org/keywords/sheep","display_name":"sheep","score":0.9959999918937683},{"id":"https://openalex.org/keywords/goats","display_name":"goats","score":1.0},{"id":"https://openalex.org/keywords/cattle","display_name":"cattle","score":0.7889999747276306}],"concepts":[{"id":"https://openalex.org/C61716771","wikidata":"https://www.wikidata.org/wiki/Q496","display_name":"Feces","level":2,"score":0.7964795827865601},{"id":"https://openalex.org/C2776632002","wikidata":"https://www.wikidata.org/wiki/Q145909","display_name":"Legume","level":2,"score":0.7530763149261475},{"id":"https://openalex.org/C140793950","wikidata":"https://www.wikidata.org/wiki/Q168091","display_name":"Animal science","level":1,"score":0.6918965578079224},{"id":"https://openalex.org/C2777904157","wikidata":"https://www.wikidata.org/wiki/Q3239189","display_name":"Grazing","level":2,"score":0.680856466293335},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.5720461010932922},{"id":"https://openalex.org/C2780505807","wikidata":"https://www.wikidata.org/wiki/Q1208989","display_name":"Beef cattle","level":2,"score":0.43050411343574524},{"id":"https://openalex.org/C6557445","wikidata":"https://www.wikidata.org/wiki/Q173113","display_name":"Agronomy","level":1,"score":0.3356729745864868},{"id":"https://openalex.org/C18903297","wikidata":"https://www.wikidata.org/wiki/Q7150","display_name":"Ecology","level":1,"score":0.14744269847869873}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1017/s0021859600060536","doi":"https://doi.org/10.1017/s0021859600060536","is_oa":false,"landing_page_url":"https://doi.org/10.1017/s0021859600060536","pdf_url":null,"source":{"id":"https://openalex.org/S12429487","display_name":"The Journal of Agricultural Science","issn_l":"0021-8596","issn":["0021-8596","1469-5146"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-c","jufo-2","norway-1","poland-70","russia-white-list-1"],"host_organization":"https://openalex.org/P4310311721","host_organization_name":"Cambridge University Press","host_organization_lineage":["https://openalex.org/P4310311721","https://openalex.org/P4310311702"],"host_organization_lineage_names":["Cambridge University Press","University of Cambridge"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"The Journal of Agricultural Science","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[{"score":0.6735000014305115,"display_name":"Zero hunger","id":"https://metadata.un.org/sdg/2"}],"study_designs":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":9,"referenced_works":["https://openalex.org/W1825019396","https://openalex.org/W1971049545","https://openalex.org/W2040667254","https://openalex.org/W2051645128","https://openalex.org/W2152296887","https://openalex.org/W2162921430","https://openalex.org/W2168896805","https://openalex.org/W2305872414","https://openalex.org/W2333304690"],"related_works":["https://openalex.org/W2083084608","https://openalex.org/W3130998750","https://openalex.org/W1980562754","https://openalex.org/W4304891815","https://openalex.org/W2162921430","https://openalex.org/W2182784730","https://openalex.org/W2147086731","https://openalex.org/W2098844477","https://openalex.org/W2058746075","https://openalex.org/W4245231701"],"abstract_inverted_index":{"Summary":[0],"The":[1],"relation":[2,168],"between":[3,169,294],"the":[4,7,16,31,70,85,110,118,125,129,137,141,146,174,177,180,191,203,207,211,214,218,222,228,237,241,247,255,260,263,268,272,275,295,302,307,324,330,335,356],"ratio":[5],"of":[6,13,21,33,55,69,114,179,199,206,217,221,227,236,262,274,287,323,344,354,358],"natural":[8],"12C":[9],"and":[10,18,38,61,97,121,152,161,176,220,224,278,297,348],"13C":[11],"isotopes":[12],"carbon":[14],"in":[15,84,128,173,187,190,202,210,231,271,292,306,317,334],"feed":[17,120,142,175,212],"resultant":[19],"faeces":[20,56,181,219,242],"animals":[22,360],"was":[23,79,164,194,252,257,312],"studied":[24],"to":[25,76,82,107,143,157,310,327],"develop":[26],"a":[27,105,165,232,285,342],"technique":[28],"for":[29,53,140,329],"estimating":[30,355],"proportion":[32],"C3":[34,98,119,151,223,296],"species":[35,40],"(tropical":[36,41],"legumes)":[37],"C4":[39,96,126,153,225,298],"grasses)":[42],"selected":[43],"by":[44,73,87,315],"grazing":[45,359],"animals.":[46],"In":[47],"general,":[48],"the\u03b413C":[49],"values":[50,245,322],"(see":[51],"text":[52],"definition)":[54],"from":[57,74,213],"rabbits,":[58,158],"sheep,":[59,159,276],"goats":[60,160,277],"cattle":[62,102,162,279],"were":[63,100,155],"lower":[64,92,244],"(more":[65],"negative)":[66],"than":[67,246],"those":[68],"corresponding":[71,248],"feeds":[72,99,154,264],"0\u00b74":[75],"2\u00b70.":[77],"This":[78,131,250,304],"possibly":[80],"due":[81],"contamination":[83],"gut":[86],"tissues":[88],"or":[89],"fluids":[90],"with":[91,136,196,284,341,351],"\u03b413C":[93,178,192,215,261],"values.":[94],"When":[95,149],"alternated,":[101],"took":[103],"about":[104,288],"week":[106],"fully":[108],"achieve":[109],"new":[111],"level":[112],"(\u03b413C":[113],"\u2013":[115,122],"28\u00b77":[116],"on":[117,124,259],"13\u00b71":[123],"feed)":[127],"faeces.":[130],"time":[132,138],"lag":[133],"is":[134],"associated":[135,195],"taken":[139],"move":[144],"through":[145],"digestive":[147],"tract.":[148],"mixed":[150],"fed":[156,309],"there":[163],"negative":[166],"linear":[167],"percentage":[170,208,270,333],"legume":[171,201,209,238,269],"(C3)":[172],"(P":[182],"<":[183],"0\u00b701).":[184],"A":[185],"decrease":[186],"one":[188],"unit":[189],"value":[193,216],"an":[197],"increase":[198],"7\u00b70\u20138\u00b75%":[200],"diet.":[204],"Estimation":[205],"components":[226,299,326],"diet,":[229],"resulted":[230],"consistent":[233],"over":[234],"estimation":[235],"component":[239],"because":[240],"had":[243],"feeds.":[249],"bias":[251,301,305],"removed":[253,314],"if":[254],"prediction":[256],"based":[258],"minus":[265],"1":[266],"unit;":[267],"diets":[273,308],"could":[280,337],"then":[281,338],"be":[282,339],"estimated":[283,340],"precision":[286],"\u00b1":[289,345],"5%.":[290],"Differences":[291],"digestibility":[293,321],"greatly":[300],"estimations.":[303],"rabbits":[311],"effectively":[313],"using":[316],"vitro":[318],"organic":[319],"matter":[320],"two":[325],"correct":[328],"differences.":[331],"Legume":[332],"diet":[336,357],"RSD":[343],"3%.":[346],"Advantages":[347],"disadvantages":[349],"compared":[350],"alternative":[352],"methods":[353],"are":[361],"discussed.":[362]},"counts_by_year":[{"year":2026,"cited_by_count":1},{"year":2025,"cited_by_count":5},{"year":2023,"cited_by_count":3},{"year":2022,"cited_by_count":6},{"year":2021,"cited_by_count":5},{"year":2020,"cited_by_count":3},{"year":2019,"cited_by_count":8},{"year":2018,"cited_by_count":3},{"year":2017,"cited_by_count":3},{"year":2016,"cited_by_count":1},{"year":2015,"cited_by_count":4},{"year":2014,"cited_by_count":4},{"year":2013,"cited_by_count":5},{"year":2012,"cited_by_count":8}],"updated_date":"2026-11-07T11:25:07.637180","created_date":"2016-06-24T00:00:00"}