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Annual increments in back-calculated length were 194 mm the first year, 57 mm the second year, and 42, 34 and 25 mm for years 3-5. Annual growth for ages 6-10 and 11-16 yr averaged 13 and 12 mm. The von Bertalanffy growth model fitted to these data is given. Sex ratio at size and age data indicated that knobbed porgy are protogynous hermaphrodites, changing sex when they are 300-500 mm TL. Females were significantly predominant in the sample population (59%). Monthly mean gonosomatic indices suggest that fish spawn in May and June. Limited diet data showed that knobbed porgy are benthic carnivores preying primarily on mollusks, crabs, polychaetes and sea urchins, which they crush with their strong jaw and pharyngeal teeth.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Growth, mortality, reproduction and feeding of knobbed porgy, <i>Calamus nodosus</i>, along the southeastern United States coast","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":1990,"MonPub":null,"DateUpdate":"2017-02-06","DateCreate":"2010-03-16","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:A1990DU13500007","VABBcode":null,"OpenAcc":1},"refs":null,"anarec":{"AnaID":144229,"PubliDate":1990,"Pagination":"677-687","XtraPublOfAnaID":null,"ISBN":null,"Volume":"46","Issue":"3","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":42490,"SerRR":"Bulletin of Marine Science. 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