{"refrec":{"BRefID":12980,"RR":"<b>Knol, E.</b> (1983). Over de groei van nonnetjes (<i>Macoma balthica</i>) op het Balgzand. <i>Interne verslagen Nederlands Instituut voor Onderzoek der Zee</i>, 1983(1). NIOZ: Texel. 55 pp.","BEntID":12980,"PublicFlag":1,"CheckedFlag":0,"wosflag":0,"vabbflag":0,"RefStringPartII":". <i>Interne verslagen Nederlands Instituut voor Onderzoek der Zee</i>, 1983(1). NIOZ: Texel.  55 pp.","DocTypID":13,"DocType":"Reports","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Knol, E.","OrigTitleTranslFlag":1,"Authorstringtrunc":"Knol, E.","Englishabstract":"Onset of growth has been studied during a fourteen years sampling program of the Balgzand <i>Macoma balthica</i> population (e.g. BEUKEMA, 1974) .The onset of growth starts in the last week of February for some <i>Macoma</i>. About the middle of March nearly the whole population is growing. Strong winters delay the onset of growth of most <i>Macoma</i>. At the northern transects <i>Macoma</i> is setting on growth earlier because the northern transects are close to the North Sea water inlet, and this water is warmer than the southern transects in winter. During the first half of 1982 the increase of Ashfree Dry weight (a.d.w.), the increase of shell weight and the increase of shell length have been observed at different begin length classes. All three start at the beginning of March. Until spawning especially increase of a.d.w. and shell length are large. After spawning increase of shell weight is large too. At the end of June or at the beginning of July the growth of <i>Macoma</i> stops.","AbstractOtherLang":"Het jaarlijks begin van de groei van het nonnetje op het Balgzand werd bestudeerd aan de hand van schelpen verzameld gedurende een veertienjarig bemonsteringsprogramma (bv. BEUKEMA, 1974). Eind-februari beginnen de eerste nonnetjes te groeien, half-maart is bijna de hele populatie begonnen met de groei. Na strenge winters blijkt de groei bij de meeste nonnetjes later te beginnen. Bij de 's winters warmere noordelijke raaien begint de groei eerder. Verder werd in het eerste halfjaar van 1982 de toename van het asvrij droog gewicht (a.d.g) van het schelpgewicht en van de schelplengte vervolgd voor verschillende lengteklassen van jonge nonnetjes (4 tot 10 mm). Begin-maart begonnen deze drie grootheden toe te nemen. Tot de paaitijd is er vooral een toename van a.d.g. en schelplengte. Na de paaitijd is ook de toename van het schelpgewicht groot. Eind-juni, begin-juli stopt de groei.","BibLvlCode":"MS","StandardTitle":"Over de groei van nonnetjes (<i>Macoma balthica</i>) op het Balgzand","OrigTitleLangCode":"nl","OrigTitleLangCodeExtended":"dut","OrigTitleLangID":41,"DateLastModified":{"date":"2025-07-22 01:33:06.175990","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":null,"MonPub":1983,"DateUpdate":"2025-07-15","DateCreate":"2001-07-06","SecASFANote":null,"ConfID":null,"PeerRev":0,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":1},"refs":null,"anarec":null,"monrec":{"MonID":12980,"ISBN":null,"PubliDate":1983,"IssueDate":null,"Volume":"1983","Issue":"1","Pagination":"55","Place":"Texel","Edition":null,"BRefXtra":null,"BRefXtraRR":null,"SerID":5036,"SerRR":"Interne verslagen Nederlands Instituut voor Onderzoek der Zee. Nederlands Insituut voor Onderzoek der Zee: Texel. 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