{"refrec":{"BRefID":33724,"RR":"<b>Watson, G.J.; Langford, F.M.; Gaudron, S.M.; Bentley, M.G.</b> (2000). Factors influencing spawning and pairing in the scale worm <i>Harmothoe imbricata</i> (Annelida: Polychaeta). <i>Biol. Bull. 199</i>: 50-58. <a href=\"https://dx.doi.org/10.2307/1542706\" target=\"_blank\">https://dx.doi.org/10.2307/1542706</a>","BEntID":33724,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>Biol. Bull. 199</i>: 50-58. <a href=\"https://dx.doi.org/10.2307/1542706\" target=\"_blank\">https://dx.doi.org/10.2307/1542706</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Watson, G.J.; Langford, F.M.; Gaudron, S.M.; Bentley, M.G.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Watson, G.J. <i>et al.</i>","Englishabstract":"Endocrine and environmental factors control reproduction of the polynoid scale worm <i>Harmothoe imbricate</i>. We confirmed that the rate of vitellogenesis was greater in winter specimens transferred from ambient regimes of photoperiod and temperature to a light:dark (LD) photoperiod of 16:8 at 10°C and showed that the number of females spawning was significantly greater than for those transferred to LD8:16 at 10°C. The endocrine mediation of this response was investigated using prostomium implantations. Significantly more LD8:16 females implanted with prostomia from LD16:8 conditioned females spawned than LD8:16 females implanted with LD8:16 prostomia. Fe-males without prostomia failed to spawn. LD16:8 exposure may increase levels of a possible “spawning hormone” in the prostomium. Spawning proceeded in these LD16:8 females and allowed spawning to occur in LD8:16 females implanted with LD16:8 prostomia. In LD8:16 prostomia, titers of the spawning hormone reached the threshold in significantly fewer individuals, so that significantly fewer females implanted with LD8:16 prostomia spawned. Using Y-maze choice chambers, pair formation was shown to be under pheromonal control, with males being attracted to mature females but not to females carrying fertilized oocytes or to LD8:16 conditioned females. Production of this attraction pheromone can, therefore, be manipulated through photoperiodic control, suggesting a link between oogenesis, spawning, and pheromone production.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Factors influencing spawning and pairing in the scale worm <i>Harmothoe imbricata</i> (Annelida: Polychaeta)","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-06-14 01:31:05.765339","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2000,"MonPub":null,"DateUpdate":"2003-04-01","DateCreate":"2003-04-01","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000088946500007","VABBcode":null,"OpenAcc":0,"DOI":"10.2307/1542706"},"refs":null,"anarec":{"AnaID":33724,"PubliDate":2000,"Pagination":"50-58","XtraPublOfAnaID":null,"ISBN":null,"Volume":"199","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":42437,"SerRR":"The Biological Bulletin. 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