{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,28]],"date-time":"2025-12-28T02:19:07Z","timestamp":1766888347549},"reference-count":0,"publisher":"Medpharm Publications","issue":"2","license":[{"start":{"date-parts":[[2003,6,27]],"date-time":"2003-06-27T00:00:00Z","timestamp":1056672000000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. S. Afr. Vet. Assoc."],"abstract":"<jats:p>Data were obtained from a population consisting of 160 Merino ewes, as well as 64 male and 75 female progeny of these ewes at the 2-tooth age. The age and sex groups were maintained in separate flocks. The population has been divergently selected from the same base since 1986, either for (high or H line) or against (low or L line) maternal multiple rearing ability. All animals were inspected for sheep lice (Bovicola ovis) during September \/ October 2002 after a wool growth period of at least 4 months. When expressed relative to mean L-line performance, the advantage in lambs weaned per ewe during the lambing season amounted to approximately 110 % in the H line (1.01 vs 0.48; P  0.01). The proportion of animals on which 1 or more lice were observed were markedly lower in 2-tooth replacement ewes than in replacement rams and mature breeding ewes (0.053 vs 0.625 and 0.531, respectively; P  0.01). One or more lice were observed on a lower proportion of H-line ewes than on those of the L line (0.413 vs 0.571, respectively; P  0.10), while a similar tendency was observed in 2-tooth ewe hoggets (0.033 vs 0.143, respectively; P =0.16). When the mean number of lice on individuals on which 1 or more lice were observed was compared between lines, the average number of lice observed on H-line young rams was lower than in the L line (4.36 \u00c2\u00b1 0.85 vs 9.71 \u00c2\u00b1 1.84 lice, respectively; P  0.01). A similar tendency was observed in mature breeding ewes (2.15 \u00c2\u00b1 0.38 vs 3.22 \u00c2\u00b1 0.42 lice, respectively; P  0.20). The more highly reproductive H-line ewes were not more susceptible to infestation with B. ovis than ewes of the L line. In fact, available evidence suggest that H-line animals could be more tolerant of B. ovis than those of the L line.<\/jats:p>","DOI":"10.4102\/jsava.v74i2.506","type":"journal-article","created":{"date-parts":[[2012,8,24]],"date-time":"2012-08-24T14:20:44Z","timestamp":1345818044000},"page":"57-59","source":"Crossref","is-referenced-by-count":1,"title":["Infestation with the sheep body louse (Bovicola ovis) in Merino lines divergently selected for maternal multiple rearing ability : short communication"],"prefix":"10.36303","volume":"74","author":[{"given":"S.W.P.","family":"Cloete","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J.M.","family":"Laubscher","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J.J.E.","family":"Cloete","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"22149","published-online":{"date-parts":[[2003,6,27]]},"container-title":["Journal of the South African Veterinary Association"],"original-title":[],"link":[{"URL":"https:\/\/journals.jsava.aosis.co.za\/index.php\/jsava\/article\/viewFile\/506\/488","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.jsava.aosis.co.za\/index.php\/jsava\/article\/viewFile\/506\/488","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,1,30]],"date-time":"2023-01-30T14:55:06Z","timestamp":1675090506000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.jsava.aosis.co.za\/index.php\/jsava\/article\/view\/506"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2003,6,27]]},"references-count":0,"journal-issue":{"issue":"2","published-online":{"date-parts":[[2003,6,27]]}},"URL":"https:\/\/doi.org\/10.4102\/jsava.v74i2.506","relation":{},"ISSN":["2224-9435","1019-9128"],"issn-type":[{"value":"2224-9435","type":"electronic"},{"value":"1019-9128","type":"print"}],"subject":[],"published":{"date-parts":[[2003,6,27]]}}}