FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2021306318> ?p ?o ?g. }

• W2021306318 endingPage "295" @default.
• W2021306318 startingPage "282" @default.
• W2021306318 abstract "During the 12 months from September 1955 to August 1956, the reproductive tracts and ovaries of 4094 adult Merino ewes, recovered from the municipal abattoir at Pietermaritzburg, were examined. The great majority of the ewes had been consigned to the abattoir from one of three regions, between which differences in the nutritional value of the natural vegetation at different times of the year are recognized. From observations of the occurrence in the ovaries of active corpora lutea, it appeared that in some areas, mating Merino ewes during autumn and early winter is likely to result in the greatest percentage of ewes conceiving and in the highest lambing percentages. There was a suggestion, however, that in the more arid karoo areas, the percentage of ewes ovulating, as well as the mean ovulation rate per ewe, may remain relatively constant throughout the year. It seems likely that the low fertility of ewes of this breed may be due partly to the practice of introducing the rams into the flock at a time of year (spring and summer) in which many of the ewes are anoestrous, a practice which is often adopted in South Africa in order to avoid the poor growth rates which are known to occur among young lambs as a result of the high temperatures and the internal parasite infestations that are comcommon in the summer months. A need, in different areas, for extensive experimental evidence of the most suitable season for mating, is indicated. No evidence of nutritional effects on fertility, either within or between areas, was obtained, but it is suggested that a higher proportion of ewes in certain areas may be capable of lambing in autumn as a result of more effective selection for this trait in these areas. There is also evidence that lack of fertilization of ova and early embryonic death may contribute significantly to the breed's low fertility. Corpora lutea were observed more frequently in the right ovary than in the left. In gravid uteri, a greater proportion of foetuses were found in the right horn and, in addition, significantly more ova apparently migrated from the left ovary to the right horn than from the right ovary to the left horn. The numbers are given of large (diameter > 4 mm.) and medium (diameter 2–4 mm.) follicles observed in the ovaries both of non-pregnant ewes and of ewes in different stages of pregnancy, these stages having been estimated from measurements of foetal crownrump lengths." @default.
• W2021306318 created "2016-06-24" @default.
• W2021306318 creator A5064139401 @default.
• W2021306318 date "1959-06-01" @default.
• W2021306318 modified "2023-09-25" @default.
• W2021306318 title "A contribution to the study of the problem of low fertility among Merino ewes in South Africa" @default.
• W2021306318 cites W1991184282 @default.
• W2021306318 cites W1997252098 @default.
• W2021306318 cites W2011968183 @default.
• W2021306318 cites W2043416141 @default.
• W2021306318 cites W2072968202 @default.
• W2021306318 cites W2072978531 @default.
• W2021306318 cites W2098928052 @default.
• W2021306318 cites W2101096493 @default.
• W2021306318 cites W2109866282 @default.
• W2021306318 cites W2160690610 @default.
• W2021306318 cites W2163762840 @default.
• W2021306318 cites W2259186075 @default.
• W2021306318 cites W2318706315 @default.
• W2021306318 cites W2341011300 @default.
• W2021306318 cites W2535486495 @default.
• W2021306318 cites W2560782686 @default.
• W2021306318 cites W2562169299 @default.
• W2021306318 cites W2015659117 @default.
• W2021306318 doi "https://doi.org/10.1017/s0021859600029580" @default.
• W2021306318 hasPublicationYear "1959" @default.
• W2021306318 type Work @default.
• W2021306318 sameAs 2021306318 @default.
• W2021306318 citedByCount "7" @default.
• W2021306318 crossrefType "journal-article" @default.
• W2021306318 hasAuthorship W2021306318A5064139401 @default.
• W2021306318 hasConcept C102874275 @default.
• W2021306318 hasConcept C103797069 @default.
• W2021306318 hasConcept C134215735 @default.
• W2021306318 hasConcept C140793950 @default.
• W2021306318 hasConcept C144024400 @default.
• W2021306318 hasConcept C149923435 @default.
• W2021306318 hasConcept C18903297 @default.
• W2021306318 hasConcept C2776482104 @default.
• W2021306318 hasConcept C2777702977 @default.
• W2021306318 hasConcept C2779234561 @default.
• W2021306318 hasConcept C2908647359 @default.
• W2021306318 hasConcept C514575182 @default.
• W2021306318 hasConcept C518429986 @default.
• W2021306318 hasConcept C54355233 @default.
• W2021306318 hasConcept C86803240 @default.
• W2021306318 hasConceptScore W2021306318C102874275 @default.
• W2021306318 hasConceptScore W2021306318C103797069 @default.
• W2021306318 hasConceptScore W2021306318C134215735 @default.
• W2021306318 hasConceptScore W2021306318C140793950 @default.
• W2021306318 hasConceptScore W2021306318C144024400 @default.
• W2021306318 hasConceptScore W2021306318C149923435 @default.
• W2021306318 hasConceptScore W2021306318C18903297 @default.
• W2021306318 hasConceptScore W2021306318C2776482104 @default.
• W2021306318 hasConceptScore W2021306318C2777702977 @default.
• W2021306318 hasConceptScore W2021306318C2779234561 @default.
• W2021306318 hasConceptScore W2021306318C2908647359 @default.
• W2021306318 hasConceptScore W2021306318C514575182 @default.
• W2021306318 hasConceptScore W2021306318C518429986 @default.
• W2021306318 hasConceptScore W2021306318C54355233 @default.
• W2021306318 hasConceptScore W2021306318C86803240 @default.
• W2021306318 hasIssue "3" @default.
• W2021306318 hasLocation W20213063181 @default.
• W2021306318 hasOpenAccess W2021306318 @default.
• W2021306318 hasPrimaryLocation W20213063181 @default.
• W2021306318 hasRelatedWork W1991214192 @default.
• W2021306318 hasRelatedWork W2014194128 @default.
• W2021306318 hasRelatedWork W2101675183 @default.
• W2021306318 hasRelatedWork W2140127115 @default.
• W2021306318 hasRelatedWork W2403222784 @default.
• W2021306318 hasRelatedWork W2418740671 @default.
• W2021306318 hasRelatedWork W2425891201 @default.
• W2021306318 hasRelatedWork W3036479204 @default.
• W2021306318 hasRelatedWork W4290412672 @default.
• W2021306318 hasRelatedWork W627583105 @default.
• W2021306318 hasVolume "52" @default.
• W2021306318 isParatext "false" @default.
• W2021306318 isRetracted "false" @default.
• W2021306318 magId "2021306318" @default.
• W2021306318 workType "article" @default.