{"id":"https://openalex.org/W1970249757","doi":"https://doi.org/10.1017/s0003356100019024","title":"The effect of sward height and active immunization against androstenedione on reproductive performance of ewes of two Welsh breeds in different body conditions","display_name":"The effect of sward height and active immunization against androstenedione on reproductive performance of ewes of two Welsh breeds in different body conditions","publication_year":1988,"publication_date":"1988-06-01","ids":{"openalex":"https://openalex.org/W1970249757","doi":"https://doi.org/10.1017/s0003356100019024","mag":"1970249757"},"language":"en","primary_location":{"id":"doi:10.1017/s0003356100019024","doi":"https://doi.org/10.1017/s0003356100019024","is_oa":false,"landing_page_url":"https://doi.org/10.1017/s0003356100019024","pdf_url":null,"source":{"id":"https://openalex.org/S2764931050","display_name":"Animal Production","issn_l":"0003-3561","issn":["0003-3561","2053-5872"],"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"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":"Animal Production","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/A5089892007","display_name":"R. G. Gunn","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"R. G. Gunn","raw_affiliation_strings":["Macaulay Land Use Research Institute, Bush Estate, Penicuik, Midlothian EH26 0PY"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Macaulay Land Use Research Institute, Bush Estate, Penicuik, Midlothian EH26 0PY","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5110489178","display_name":"S. M. Rhind","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"S. M. Rhind","raw_affiliation_strings":["Macaulay Land Use Research Institute, Bush Estate, Penicuik, Midlothian EH26 0PY"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Macaulay Land Use Research Institute, Bush Estate, Penicuik, Midlothian EH26 0PY","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5005466644","display_name":"T. J. Maxwell","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"T. J. Maxwell","raw_affiliation_strings":["Macaulay Land Use Research Institute, Bush Estate, Penicuik, Midlothian EH26 0PY"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Macaulay Land Use Research Institute, Bush Estate, Penicuik, Midlothian EH26 0PY","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5004281876","display_name":"D. A. Sim","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"D. A. Sim","raw_affiliation_strings":["Macaulay Land Use Research Institute, Bush Estate, Penicuik, Midlothian EH26 0PY"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Macaulay Land Use Research Institute, Bush Estate, Penicuik, Midlothian EH26 0PY","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5102167270","display_name":"J. R. Jones","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"J. R. Jones","raw_affiliation_strings":["AFRC Institute for Grassland and Animal Production, Welsh Plant Breeding Station, Bronydd Mawr, Trecastle, Brecon, Powys LD3 8RD"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"AFRC Institute for Grassland and Animal Production, Welsh Plant Breeding Station, Bronydd Mawr, Trecastle, Brecon, Powys LD3 8RD","institution_ids":[]}]},{"author_position":"last","author":{"id":null,"display_name":"M. E. James","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"M. E. James","raw_affiliation_strings":["AFRC Institute for Grassland and Animal Production, Welsh Plant Breeding Station, Bronydd Mawr, Trecastle, Brecon, Powys LD3 8RD"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"AFRC Institute for Grassland and Animal Production, Welsh Plant Breeding Station, Bronydd Mawr, Trecastle, Brecon, Powys LD3 8RD","institution_ids":[]}]}],"institutions":[],"countries_distinct_count":0,"institutions_distinct_count":0,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":1.3267,"has_fulltext":false,"cited_by_count":7,"citation_normalized_percentile":{"value":0.76011712,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":88,"max":93},"biblio":{"volume":"46","issue":"3","first_page":"417","last_page":"426"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10584","display_name":"Reproductive Physiology in Livestock","score":0.9994999766349792,"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"}},"topics":[{"id":"https://openalex.org/T10584","display_name":"Reproductive Physiology in Livestock","score":0.9994999766349792,"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/T10594","display_name":"Genetic and phenotypic traits in livestock","score":9.999999747378752e-05,"subfield":{"id":"https://openalex.org/subfields/1311","display_name":"Genetics"},"field":{"id":"https://openalex.org/fields/13","display_name":"Biochemistry, Genetics and Molecular Biology"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T11074","display_name":"Helminth infection and control","score":0.0,"subfield":{"id":"https://openalex.org/subfields/2405","display_name":"Parasitology"},"field":{"id":"https://openalex.org/fields/24","display_name":"Immunology and Microbiology"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/sward-height","display_name":"sward height","score":0.859000027179718},{"id":"https://openalex.org/keywords/ewe-reproductive-performance","display_name":"ewe reproductive performance","score":0.9549999833106995},{"id":"https://openalex.org/keywords/body-condition-score","display_name":"body condition score","score":0.7570000290870667},{"id":"https://openalex.org/keywords/stocking-rate","display_name":"stocking rate","score":0.8840000033378601},{"id":"https://openalex.org/keywords/ovulation-rate","display_name":"ovulation rate","score":0.871999979019165},{"id":"https://openalex.org/keywords/pasture-management","display_name":"pasture management","score":0.4050000011920929},{"id":"https://openalex.org/keywords/corpus-luteum","display_name":"corpus luteum","score":0.6629999876022339},{"id":"https://openalex.org/keywords/embryo-counts","display_name":"embryo counts","score":0.4729999899864197},{"id":"https://openalex.org/keywords/estrus-synchronization","display_name":"estrus synchronization","score":0.6700000166893005}],"concepts":[{"id":"https://openalex.org/C140793950","wikidata":"https://www.wikidata.org/wiki/Q168091","display_name":"Animal science","level":1,"score":0.765954852104187},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.6930661201477051},{"id":"https://openalex.org/C2776482104","wikidata":"https://www.wikidata.org/wiki/Q38829","display_name":"Breed","level":2,"score":0.6788972616195679},{"id":"https://openalex.org/C1998276","wikidata":"https://www.wikidata.org/wiki/Q388121","display_name":"Estrous cycle","level":2,"score":0.6591030359268188},{"id":"https://openalex.org/C2777702977","wikidata":"https://www.wikidata.org/wiki/Q187082","display_name":"Ovulation","level":3,"score":0.5450092554092407},{"id":"https://openalex.org/C2778053677","wikidata":"https://www.wikidata.org/wiki/Q30121","display_name":"Pasture","level":2,"score":0.4761072099208832},{"id":"https://openalex.org/C514575182","wikidata":"https://www.wikidata.org/wiki/Q228395","display_name":"Mating","level":2,"score":0.45359960198402405},{"id":"https://openalex.org/C2776608385","wikidata":"https://www.wikidata.org/wiki/Q749637","display_name":"Corpus luteum","level":3,"score":0.44182705879211426},{"id":"https://openalex.org/C2778741295","wikidata":"https://www.wikidata.org/wiki/Q1490716","display_name":"Gestation period","level":4,"score":0.4344158470630646},{"id":"https://openalex.org/C103797069","wikidata":"https://www.wikidata.org/wiki/Q5290207","display_name":"Domestic sheep reproduction","level":2,"score":0.4240919351577759},{"id":"https://openalex.org/C2780138947","wikidata":"https://www.wikidata.org/wiki/Q393855","display_name":"Dry matter","level":2,"score":0.4141501188278198},{"id":"https://openalex.org/C6557445","wikidata":"https://www.wikidata.org/wiki/Q173113","display_name":"Agronomy","level":1,"score":0.261599063873291},{"id":"https://openalex.org/C2779234561","wikidata":"https://www.wikidata.org/wiki/Q11995","display_name":"Pregnancy","level":2,"score":0.2326573133468628},{"id":"https://openalex.org/C2778324911","wikidata":"https://www.wikidata.org/wiki/Q9631","display_name":"Ovary","level":2,"score":0.17638224363327026},{"id":"https://openalex.org/C18903297","wikidata":"https://www.wikidata.org/wiki/Q7150","display_name":"Ecology","level":1,"score":0.15802618861198425},{"id":"https://openalex.org/C134018914","wikidata":"https://www.wikidata.org/wiki/Q162606","display_name":"Endocrinology","level":1,"score":0.1356939971446991},{"id":"https://openalex.org/C46973012","wikidata":"https://www.wikidata.org/wiki/Q28627","display_name":"Gestation","level":3,"score":0.08758789300918579},{"id":"https://openalex.org/C54355233","wikidata":"https://www.wikidata.org/wiki/Q7162","display_name":"Genetics","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1017/s0003356100019024","doi":"https://doi.org/10.1017/s0003356100019024","is_oa":false,"landing_page_url":"https://doi.org/10.1017/s0003356100019024","pdf_url":null,"source":{"id":"https://openalex.org/S2764931050","display_name":"Animal Production","issn_l":"0003-3561","issn":["0003-3561","2053-5872"],"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"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":"Animal Production","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[{"score":0.991100013256073,"id":"https://metadata.un.org/sdg/2","display_name":"Zero hunger"}],"study_designs":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":6,"referenced_works":["https://openalex.org/W1998718876","https://openalex.org/W2051924798","https://openalex.org/W2058218457","https://openalex.org/W2101274554","https://openalex.org/W2147931377","https://openalex.org/W2326584931"],"related_works":["https://openalex.org/W2326584931","https://openalex.org/W1982707229","https://openalex.org/W2157294230","https://openalex.org/W4312639059","https://openalex.org/W1981676456","https://openalex.org/W2076564426","https://openalex.org/W1584674570","https://openalex.org/W2514490651","https://openalex.org/W3084882531","https://openalex.org/W2058218457"],"abstract_inverted_index":{"ABSTRACT":[0],"In":[1],"a":[2],"2":[3,5,7,9,69,159,342],"\u00d7":[4,6,8],"factorial":[10],"experiment,":[11],"the":[12,105,127,139,155,193,197,235,252,257,261,266,283,310,317,331,338,356,358,364,374,398,440],"effects":[13,224,284],"on":[14,192,234,260,265,290],"reproductive":[15,236],"performance":[16],"of":[17,23,54,83,91,107,157,196,285,322,340,393,400,408],"active":[18],"immunization":[19,163,286,383],"against":[20,113],"androstenedione":[21,114],"and":[22,35,47,101,104,121,146,162,172,217,245,259,287],"two":[24,28],"sward":[25,102,173,199,229,239,263,288,312,319],"heights":[26,53],"in":[27,43,175,180,231,241,251,256,268,275,279,302,306,333,343,363,373,384,403,431,439,443,445],"periods,":[29],"August":[30],"to":[31,37,57,70,138,205,228,238,329,348,382,413],"October":[32,36],"(period":[33,39],"1)":[34],"November":[38],"2),":[40],"were":[41,79,93,110,136,185,219,222,249,273,294,300],"investigated":[42],"144":[44],"Beulah":[45,253,367],"Speckled-face":[46],"146":[48],"Brecknock":[49],"Cheviot":[50,377],"ewes.":[51,379,405],"Sward":[52],"either":[55,202],"5":[56,122],"6":[58],"cm":[59,72],"(2200":[60],"kg":[61,74],"dry":[62],"matter":[63],"(DM)":[64],"per":[65,76,144,151,190],"ha)":[66,77,145,152],"(high)":[67],"or":[68,207,225,420],"3":[71],"(650":[73],"DM":[75],"(low)":[78],"achieved":[80],"by":[81,115,160],"adjustment":[82],"stocking":[84,323],"rate":[85,293,324],"during":[86,325],"period":[87,158,176,232,242,269,326,341],"1.":[88,177],"Two":[89],"groups":[90],"ewes":[92,106,143,150,184,189,277,281,304,308,369,444],"balanced":[94,165],"for":[95,166],"body":[96,169,335,349,394,401,421,447],"condition":[97,170,336,350,402,422],"score":[98,171],"across":[99],"breed":[100,161,254],"height":[103,174,230,240,289,313],"one":[108],"group":[109],"actively":[111],"immunized":[112,276,303,404],"injection":[116],"with":[117],"Fecundin\u00ae":[118,409],"at":[119,126,154,187,203,208,309,316,337,351,390],"8":[120],"weeks":[123,210],"before":[124],"mating":[125,179,213],"second":[128],"synchronized":[129],"oestrus":[130],"after":[131,211],"progestagen":[132],"pessary":[133],"withdrawal.":[134],"Ewes":[135],"reallocated":[137],"high":[140,198,262,318,424],"(at":[141,148],"15":[142],"low":[147,267,311],"20":[149],"swards":[153],"start":[156,339],"treatment,":[164],"live":[167],"weight,":[168],"After":[178],"mid":[181,344],"November,":[182],"all":[183],"run":[186],"19":[188],"ha":[191],"residual":[194],"pasture":[195],"until":[200],"slaughtered":[201],"return":[204],"service":[206],"4":[209],"first":[212],"when":[214,417,434],"corpora":[215],"lutea":[216],"embryos":[218],"counted.":[220],"There":[221],"no":[223],"interactions":[226],"due":[227],"1":[233,327],"responses":[237],"2.":[243,270],"Ovulation":[244,271],"potential":[246,291],"lambing":[247,292,298],"rates":[248,272,299],"greater":[250,389],"than":[255,264,278,305],"Cheviot,":[258],"higher":[274,301],"control":[280,307,368,378],"but":[282,314,370,425],"not":[295,315],"independent.":[296],"Potential":[297],"height.":[320],"Adjustment":[321],"served":[328],"increase":[330],"range":[332],"ewe":[334],"October.":[345],"Reproductive":[346],"response":[347,381],"this":[352],"time":[353],"differed":[354],"between":[355],"breeds,":[357],"relationship":[359],"being":[360],"strongly":[361],"positive":[362],"more":[365],"prolific":[366,376],"less":[371,375],"so":[372],"The":[380,406],"both":[385],"breeds":[386],"was":[387],"relatively":[388],"lower":[391],"levels":[392],"condition,":[395],"thereby":[396],"reducing":[397],"effect":[399],"use":[407],"is":[410],"therefore":[411],"unlikely":[412],"produce":[414],"much":[415],"advantage":[416,430],"pre-mating":[418],"nutrition":[419],"are":[423,437],"there":[426],"may":[427],"be":[428],"some":[429],"using":[432],"it":[433],"nutritional":[435],"resources":[436],"limited":[438],"autumn,":[441],"particularly":[442],"poorer":[446],"condition.":[448]},"counts_by_year":[{"year":2023,"cited_by_count":1},{"year":2022,"cited_by_count":1},{"year":2020,"cited_by_count":1},{"year":2014,"cited_by_count":1}],"updated_date":"2026-10-30T12:39:25.321706","created_date":"2016-06-24T00:00:00"}