Diurnal Variations of Plasma Testosterone in Two Prosimian Primates (Galago crassicaudatus crassicaudatus and Lemur catta)
Blood samples were collected at 3-h intervals over a 24-h period from males of two prosimian species ( Galago crassicaudatus crassicaudatus , N = 6; Lemur catta , N = 6). In the diurnal species ( L. catta ), testosterone levels determined by radioimmunoassay were significantly higher during the peri...
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| Veröffentlicht in: | Biology of reproduction 1976-11, Vol.15 (4), p.523-528 |
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| container_title | Biology of reproduction |
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| creator | Van Horn, R N Beamer, N B Dixson, A F |
| description | Blood samples were collected at 3-h intervals over a 24-h period from males of two prosimian
species ( Galago crassicaudatus crassicaudatus , N = 6; Lemur catta , N = 6). In the diurnal species ( L.
catta ), testosterone levels determined by radioimmunoassay were significantly higher during the
period of darkness (X = 13.50 ng/ml ± 3.07 SEM) than during the period of light (X = 2.83 ng/ml ±
1.25 SEM). By 0800 h of the second day, however, plasma testosterone concentrations in L. catta
had returned to the low levels observed at 0800 h on the first day of sampling. The nocturnal
species ( G. c. crassicaudatus ), however, showed only a nonsignificant (P>0.10 |
| doi_str_mv | 10.1095/biolreprod15.4.523 |
| format | Article |
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species ( Galago crassicaudatus crassicaudatus , N = 6; Lemur catta , N = 6). In the diurnal species ( L.
catta ), testosterone levels determined by radioimmunoassay were significantly higher during the
period of darkness (X = 13.50 ng/ml ± 3.07 SEM) than during the period of light (X = 2.83 ng/ml ±
1.25 SEM). By 0800 h of the second day, however, plasma testosterone concentrations in L. catta
had returned to the low levels observed at 0800 h on the first day of sampling. The nocturnal
species ( G. c. crassicaudatus ), however, showed only a nonsignificant (P>0.10<0.20) increase from
the dark (X = 2.65 ng/ml ± 1.17 SEM) to the light (X = 3.92 ng/ml ± 1.14 SEM).</description><identifier>ISSN: 0006-3363</identifier><identifier>EISSN: 1529-7268</identifier><identifier>DOI: 10.1095/biolreprod15.4.523</identifier><identifier>PMID: 823984</identifier><language>eng</language><publisher>United States: Society for the Study of Reproduction</publisher><subject>Animals ; Circadian Rhythm ; Lemur - blood ; Light ; Male ; Photic Stimulation ; Radioimmunoassay ; Strepsirhini - blood ; Testosterone - blood</subject><ispartof>Biology of reproduction, 1976-11, Vol.15 (4), p.523-528</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c242t-3d189aaa306313cc63a05aaac8c6a1b523350649567a66e5c6c8e0179a73cc613</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/823984$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Van Horn, R N</creatorcontrib><creatorcontrib>Beamer, N B</creatorcontrib><creatorcontrib>Dixson, A F</creatorcontrib><title>Diurnal Variations of Plasma Testosterone in Two Prosimian Primates (Galago crassicaudatus crassicaudatus and Lemur catta)</title><title>Biology of reproduction</title><addtitle>Biol Reprod</addtitle><description>Blood samples were collected at 3-h intervals over a 24-h period from males of two prosimian
species ( Galago crassicaudatus crassicaudatus , N = 6; Lemur catta , N = 6). In the diurnal species ( L.
catta ), testosterone levels determined by radioimmunoassay were significantly higher during the
period of darkness (X = 13.50 ng/ml ± 3.07 SEM) than during the period of light (X = 2.83 ng/ml ±
1.25 SEM). By 0800 h of the second day, however, plasma testosterone concentrations in L. catta
had returned to the low levels observed at 0800 h on the first day of sampling. The nocturnal
species ( G. c. crassicaudatus ), however, showed only a nonsignificant (P>0.10<0.20) increase from
the dark (X = 2.65 ng/ml ± 1.17 SEM) to the light (X = 3.92 ng/ml ± 1.14 SEM).</description><subject>Animals</subject><subject>Circadian Rhythm</subject><subject>Lemur - blood</subject><subject>Light</subject><subject>Male</subject><subject>Photic Stimulation</subject><subject>Radioimmunoassay</subject><subject>Strepsirhini - blood</subject><subject>Testosterone - blood</subject><issn>0006-3363</issn><issn>1529-7268</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1976</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpdkE9LAzEQxYP4r1a_gHjIRdHD1mSzSXePUrUKBXuoXsM0m7aR7KYmuyz66U1pKeJpZpg3b3g_hC4pGVBS8Pu5cdbrtXcl5YNswFN2gHqUp0UyTEV-iHqEEJEwJtgpOgvhkxCasZSdoOM8ZUWe9dDPo2l9DRZ_gDfQGFcH7BZ4aiFUgGc6NC402rtaY1PjWefw1LtgKgN17EwFjQ74dgwWlg4rDyEYBW0JTRv-j1CXeKKr1mMFTQN35-hoATboi13to_fnp9noJZm8jV9HD5NEpVnaJKykeQEAjAhGmVKCAeFxVrkSQOcxM-NEZAUXQxBCcyVUrgkdFjDcqCnro5utb-T01cZEsjJBaWuh1q4NMmc8UiFZFKZboYoRg9cLud4k9N-SErnhLf_ylpnc_O6jq517O690uT_ZAo7r6-16ZZarzngtI1dro5jJruv2Nr-hK41u</recordid><startdate>197611</startdate><enddate>197611</enddate><creator>Van Horn, R N</creator><creator>Beamer, N B</creator><creator>Dixson, A F</creator><general>Society for the Study of Reproduction</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>197611</creationdate><title>Diurnal Variations of Plasma Testosterone in Two Prosimian Primates (Galago crassicaudatus crassicaudatus and Lemur catta)</title><author>Van Horn, R N ; Beamer, N B ; Dixson, A F</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c242t-3d189aaa306313cc63a05aaac8c6a1b523350649567a66e5c6c8e0179a73cc613</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1976</creationdate><topic>Animals</topic><topic>Circadian Rhythm</topic><topic>Lemur - blood</topic><topic>Light</topic><topic>Male</topic><topic>Photic Stimulation</topic><topic>Radioimmunoassay</topic><topic>Strepsirhini - blood</topic><topic>Testosterone - blood</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Van Horn, R N</creatorcontrib><creatorcontrib>Beamer, N B</creatorcontrib><creatorcontrib>Dixson, A F</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Biology of reproduction</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Van Horn, R N</au><au>Beamer, N B</au><au>Dixson, A F</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Diurnal Variations of Plasma Testosterone in Two Prosimian Primates (Galago crassicaudatus crassicaudatus and Lemur catta)</atitle><jtitle>Biology of reproduction</jtitle><addtitle>Biol Reprod</addtitle><date>1976-11</date><risdate>1976</risdate><volume>15</volume><issue>4</issue><spage>523</spage><epage>528</epage><pages>523-528</pages><issn>0006-3363</issn><eissn>1529-7268</eissn><abstract>Blood samples were collected at 3-h intervals over a 24-h period from males of two prosimian
species ( Galago crassicaudatus crassicaudatus , N = 6; Lemur catta , N = 6). In the diurnal species ( L.
catta ), testosterone levels determined by radioimmunoassay were significantly higher during the
period of darkness (X = 13.50 ng/ml ± 3.07 SEM) than during the period of light (X = 2.83 ng/ml ±
1.25 SEM). By 0800 h of the second day, however, plasma testosterone concentrations in L. catta
had returned to the low levels observed at 0800 h on the first day of sampling. The nocturnal
species ( G. c. crassicaudatus ), however, showed only a nonsignificant (P>0.10<0.20) increase from
the dark (X = 2.65 ng/ml ± 1.17 SEM) to the light (X = 3.92 ng/ml ± 1.14 SEM).</abstract><cop>United States</cop><pub>Society for the Study of Reproduction</pub><pmid>823984</pmid><doi>10.1095/biolreprod15.4.523</doi><tpages>6</tpages></addata></record> |
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| ispartof | Biology of reproduction, 1976-11, Vol.15 (4), p.523-528 |
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| language | eng |
| recordid | cdi_proquest_miscellaneous_83514304 |
| source | MEDLINE; EZB-FREE-00999 freely available EZB journals |
| subjects | Animals Circadian Rhythm Lemur - blood Light Male Photic Stimulation Radioimmunoassay Strepsirhini - blood Testosterone - blood |
| title | Diurnal Variations of Plasma Testosterone in Two Prosimian Primates (Galago crassicaudatus crassicaudatus and Lemur catta) |
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