{"refrec":{"BRefID":4147,"RR":"<b>Pankhurst, N.W.; Pankhurst, P.M.; Hilder, P.I.; Hilder, M.L.</b> (2000). <i>In vivo</i> and<i> in vitro</i> ovarian steroid production by fish from a natural population of the brooding tropical damselfish <i>Acanthochromis polyacanthus</i>, <b><i>in</i></b>: Norberg, B. <i>et al.</i> (Ed.) <i>Proceedings of the 6th International Symposium on the Reproductive Physiology of Fish, Bergen, Norway, July 4-9, 1999.</i> pp. 99-102","BEntID":4147,"PublicFlag":1,"CheckedFlag":0,"wosflag":null,"vabbflag":null,"RefStringPartII":", <b><i>in</i></b>: Norberg, B. <i>et al.</i> <i>Proceedings of the 6th International Symposium on the Reproductive Physiology of Fish, Bergen, Norway, July 4-9, 1999. International Symposium on the Reproductive Physiology of Fish,</i> 6: pp. 99-102","DocTypID":17,"DocType":"Book chapters","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Pankhurst, N.W.; Pankhurst, P.M.; Hilder, P.I.; Hilder, M.L.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Pankhurst, N.W. <i>et al.</i>","Englishabstract":"Spiny damselfish were captured from natural populations and plasma levels of gonadal steroids and the capacity of ovarian tissue to produce steroids <i>in vitro</i> was assessed across the boundary between regressed and reproductively active fish. Vitellogenic fish had higher plasma levels of testosterone (T) than previtellogenic fish and measurable levels of 17 beta -estradiol (E sub(2)) (non-detectable in regressed fish). Vitellogenic follicles were gonadotropin (GtH) sensitive and produced T and E sub(2) in response to steroid precursors, whereas previtellogenic follicles were less GtH sensitive, and did not reliably produce steroids from precursors. The level of blockade is suggested to be at the GtH receptor level and also in the capacity of ovarian tissue to convert steroid substrates upstream of T.","AbstractOtherLang":null,"BibLvlCode":"AMS","StandardTitle":"<i>In vivo</i> and<i> in vitro</i> ovarian steroid production by fish from a natural population of the brooding tropical damselfish <i>Acanthochromis polyacanthus</i>","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2025-07-08 01:30:34.705248","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2000,"MonPub":null,"DateUpdate":"2001-08-08","DateCreate":"2000-10-31","SecASFANote":null,"ConfID":null,"PeerRev":0,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":0},"refs":null,"anarec":{"AnaID":4147,"PubliDate":2000,"Pagination":"99-102","XtraPublOfAnaID":null,"ISBN":"82-7461-048-2","Volume":"6","Issue":null,"BRefMon":4111,"BRefMonRR":"<b>Norberg, B. <i>et al.</i></b> (2000). 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