{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,10]],"date-time":"2026-02-10T10:19:55Z","timestamp":1770718795123,"version":"3.49.0"},"reference-count":8,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2006,1,12]],"date-time":"2006-01-12T00:00:00Z","timestamp":1137024000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Reprod Domestic Animals"],"published-print":{"date-parts":[[2006,2]]},"abstract":"<jats:title>Contents<\/jats:title><jats:p>Selection of fertile sires is crucial for profitable lamb production. Males with larger testes tend to sire daughters that reach puberty at an earlier age and ovulate more ova during each oestrus period. Measurement of the scrotal circumference (SC) is thus an essential part of the breeding soundness evaluation. Testicular size varies with breed, age and time of the year. No SC values or recommendations for minimal values have been established in any of the Scandinavian domestic sheep breeds. Data were recorded of the SC, age and weight in 245 ram lambs and 27 mature rams of the Gotlandic breed, which is the breed that constitutes about 50% of the Swedish sheep population. For the ram lambs, the overall mean SC was 28.9 (\u00b11.9) cm at an average age of 170 (\u00b19) days and mean weight of 53.5 (\u00b17.0) kg, and the mean SC varied between 27.1 and 29.6\u2003cm depending on age and weight. For mature rams (17\u201354\u2003month old), the mean SC was 32.4(\u00b12)\u2003cm. To provide a practical tool for exclusion of rams with sub\u2010optimal reproductive capacity (abnormal testes or those with small testes because of delayed puberty) a threshold value was established based on the average SC minus 2\u2003SD. The calculated minimal SC is 26\u2003cm for ram lambs &gt;5.5\u2003months of age with a body weight of &gt;50\u2003kg. For mature rams, minimum SC is 28\u2003cm regardless of weight and age.<\/jats:p>","DOI":"10.1111\/j.1439-0531.2006.00608.x","type":"journal-article","created":{"date-parts":[[2006,1,12]],"date-time":"2006-01-12T15:54:11Z","timestamp":1137081251000},"page":"61-62","source":"Crossref","is-referenced-by-count":18,"title":["Normal Values for the Scrotal Circumference in Rams of Gotlandic Breed"],"prefix":"10.1111","volume":"41","author":[{"given":"L","family":"S\u00f6derquist","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"F","family":"Hult\u00e9n","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2006,1,12]]},"reference":[{"key":"e_1_2_5_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0921-4488(99)00131-5"},{"key":"e_1_2_5_3_1","first-page":"44","article-title":"Preliminary report on ram scrotal circumference measurements","volume":"10","author":"Braun WF","year":"1980","journal-title":"Soc Theriogenol"},{"key":"e_1_2_5_4_1","doi-asserted-by":"crossref","first-page":"161","DOI":"10.1186\/BF03547686","article-title":"Onset of spermatogenesis in Corriedale ram lambs under extensive rearing conditions in Uruguay","volume":"36","author":"Castrillejo A","year":"1995","journal-title":"Acta Vet Scand"},{"key":"e_1_2_5_5_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1751-0813.1989.tb09707.x"},{"key":"e_1_2_5_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/0093-691X(81)90112-6"},{"key":"e_1_2_5_7_1","first-page":"376","article-title":"Seasonal variations in scrotal circumference, sperm quality, and sexual ability in rams","volume":"181","author":"Mickelsen WD","year":"1982","journal-title":"J Am Vet Med Assoc"},{"key":"e_1_2_5_8_1","doi-asserted-by":"crossref","first-page":"622","DOI":"10.2527\/jas1985.603622x","article-title":"Breed group differences in testicular growth patterns in spring\u2010born ram lambs","volume":"60","author":"Notter DR","year":"1985","journal-title":"J Anim Sci"},{"key":"e_1_2_5_9_1","volume-title":"The SAS System for Windows","author":"SAS Institute Inc.","year":"1996"}],"container-title":["Reproduction in Domestic Animals"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1111%2Fj.1439-0531.2006.00608.x","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/j.1439-0531.2006.00608.x","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,10,10]],"date-time":"2023-10-10T05:50:49Z","timestamp":1696917049000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/j.1439-0531.2006.00608.x"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2006,1,12]]},"references-count":8,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2006,2]]}},"alternative-id":["10.1111\/j.1439-0531.2006.00608.x"],"URL":"https:\/\/doi.org\/10.1111\/j.1439-0531.2006.00608.x","archive":["Portico"],"relation":{},"ISSN":["0936-6768","1439-0531"],"issn-type":[{"value":"0936-6768","type":"print"},{"value":"1439-0531","type":"electronic"}],"subject":[],"published":{"date-parts":[[2006,1,12]]}}}