{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,21]],"date-time":"2026-05-21T14:36:18Z","timestamp":1779374178774,"version":"3.53.1"},"reference-count":44,"publisher":"Oxford University Press (OUP)","issue":"5","license":[{"start":{"date-parts":[[2013,5,1]],"date-time":"2013-05-01T00:00:00Z","timestamp":1367366400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/pages\/standard-publication-reuse-rights"}],"content-domain":{"domain":["rep.bioscientifica.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2013,5,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Season-induced variation in fatty acid and cholesterol composition in bovine semen has been associated with semen quality. Given the specific roles of the various semen compartments (seminal fluids, sperm head, and sperm tail) in fertilization, we hypothesized that environmental-stress-induced alterations in the lipid composition of a specific compartment might impair semen quality and sperm function. Semen samples were collected from five mature Holstein\u2013Friesian bulls during the summer (August to September) and winter (December to January). Semen was evaluated by computerized sperm-quality analyzer, calibrated for bulls' semen, and centrifuged to separate the spermatozoa from the seminal fluids. The spermatozoal fraction was sonicated to separate the sperm head and tail compartments. Cold lipid extraction was performed with chloroform:methanol (2:1, vol\/vol). Lipids were identified and quantified by gas chromatography. Seasonal variation was found in both physiological and structural parameters. The proportion of spermatozoa defined as morphologically normal was higher in the winter, with higher motility, progressive motility, and velocity relative to summer samples. Lipid composition within fractions varied between seasons with prominent impairment in the tail compartment, characterized by high saturated fatty acid, low polyunsaturated fatty acid, and low cholesterol concentrations during the summer. Given the association between alterations in lipid composition and reduced sperm motility and velocity during the summer, it is suggested that lipid composition might serve to predict sperm quality.<\/jats:p>","DOI":"10.1530\/rep-12-0498","type":"journal-article","created":{"date-parts":[[2013,4,30]],"date-time":"2013-04-30T15:22:33Z","timestamp":1367335353000},"page":"479-489","update-policy":"https:\/\/doi.org\/10.1530\/crossmarkpolicy-1","source":"Crossref","is-referenced-by-count":48,"title":["Season-induced variation in lipid composition is associated with semen quality in Holstein bulls"],"prefix":"10.1093","volume":"145","author":[{"given":"N","family":"Argov-Argaman","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"K","family":"Mahgrefthe","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Y","family":"Zeron","sequence":"additional","affiliation":[{"name":"The Robert H. Smith Faculty of Agriculture \u00a0 Food and Environment, The Hebrew University, Rehovot 76100, Israel 1 \u00a0 Hafetz-Haim, Israel"},{"name":"Sion Artificial Insemination Center \u00a0 Food and Environment, The Hebrew University, Rehovot 76100, Israel 1 \u00a0 Hafetz-Haim, Israel"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Z","family":"Roth","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2013,5,1]]},"reference":[{"key":"2026010712250366700_bib1","doi-asserted-by":"crossref","first-page":"431","DOI":"10.1530\/jrf.0.0180431","article-title":"Fatty acid composition of lipids of bull, boar, rabbit and human semen","volume":"18","author":"Ahluwalia","year":"1969","journal-title":"Journal of Reproduction and Fertility"},{"key":"2026010712250366700_bib2","doi-asserted-by":"crossref","first-page":"5988","DOI":"10.3168\/jds.2009-2343","article-title":"Heat-stress abatement 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