{"refrec":{"BRefID":33500,"RR":"<b>Pires, A.; Croll, R.P.; Hadfield, M.G.</b> (2000). Catecholamines modulate metamorphosis in the opisthobranch gastropod <i>Phestilla sibogae</i>. <i>Biol. Bull. 198</i>: 319-331. <a href=\"https://dx.doi.org/10.2307/1542688\" target=\"_blank\">https://dx.doi.org/10.2307/1542688</a>","BEntID":33500,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>Biol. Bull. 198</i>: 319-331. <a href=\"https://dx.doi.org/10.2307/1542688\" target=\"_blank\">https://dx.doi.org/10.2307/1542688</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Pires, A.; Croll, R.P.; Hadfield, M.G.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Pires, A.; Croll, R.P.; Hadfield, M.G.","Englishabstract":"Larvae of the nudibranch <i>Phestilla sibogae</i> are induced to metamorphose by a factor from their adult prey, the coral <i>Porites compressa</i>. Levels of endogenous catecholamines increase 6 to 9 days after fertilization, when larvae become competent for metamorphosis. Six- to nine-day larvae, treated with the catecholamine precursor L-DOPA (0.01 mM for 0.5 h), were assayed for metamorphosis in response to coral inducer and for catecholamine content by high-performance liquid chromatography. L-DOPA treatment caused 20- to 50-fold increases in dopamine, with proportionally greater increases in younger larvae, so that L-DOPA-treated larvae of all ages contained similar levels of dopamine. A much smaller (about twofold) increase in norepinephrine occurred in all larvae. The treatment significantly potentiated the frequency of metamorphosis of 7- to 9-d larvae at low concentrations of inducer. In addition, L-DOPA treatment at 9 d increased aldehyde-induced fluorescence in cells that were also labeled in the controls, and revealed additional cells. However, all labeled cells were consistent with the locations of cells showing tyrosine-hydroxylase-like immunoreactivity. Catecholamines are likely to modulate metamorphosis in <i>P. sibogae</i>, but rising levels of catecholamines around the time of competence are insufficient alone to account for sensitivity to inducer in competent larvae.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Catecholamines modulate metamorphosis in the opisthobranch gastropod <i>Phestilla sibogae</i>","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-06-14 01:31:05.718459","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2000,"MonPub":null,"DateUpdate":"2003-03-27","DateCreate":"2003-03-27","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000087933000002","VABBcode":null,"OpenAcc":0,"DOI":"10.2307/1542688"},"refs":null,"anarec":{"AnaID":33500,"PubliDate":2000,"Pagination":"319-331","XtraPublOfAnaID":null,"ISBN":null,"Volume":"198","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":42437,"SerRR":"The Biological Bulletin. Marine Biological Laboratory: Lancaster.  ISSN 0006-3185; e-ISSN 1939-8697","StandardTitleSer":"The Biological Bulletin","ISSN":"0006-3185","AbbrevSer":"Biol. 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