{"refrec":{"BRefID":27047,"RR":"<b>Fransz, H.G.; Gonzalez, S.R.; Klein Breteler, W.C.M.</b> (1989). Fecundity as a factor controlling the seasonal population cycle in <i>Temora longicornis</i> (Copepoda, Calanoida), <b><i>in</i></b>: Ryland, J.S. <i>et al.</i> (Ed.) <i>Reproduction, Genetics and Distributions of Marine Organisms: 23rd European Marine Biology Symposium, School of Biological Sciences, University of Wales, Swansea, 5-9 September 1988. International Symposium Series,</i> : pp. 83-90","BEntID":27047,"PublicFlag":1,"CheckedFlag":0,"wosflag":null,"vabbflag":null,"RefStringPartII":", <b><i>in</i></b>: Ryland, J.S. <i>et al.</i> <i>Reproduction, genetics and distributions of marine organisms: 23rd European Marine Biology Symposium, School of Biological Sciences, University of Wales, Swansea, 5-9 September 1988. European Marine Biology Symposia,</i> 23: pp. 83-90","DocTypID":17,"DocType":"Book chapters","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Fransz, H.G.; Gonzalez, S.R.; Klein Breteler, W.C.M.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Fransz, H.G.; Gonzalez, S.R.; Klein Breteler, W.C.M.","Englishabstract":"Daily fecundity in the copepod <i>Temora longicornis</i> (O.F. Müller) was measured in the southern North Sea by 24 h incubation of mature females. It was increasing in spring from about 5 eggs per female in Feb to 30 at the end of Apr. It fluctuated between 3 and 30 eggs in May and Jun, and on a low level between 1 to 8 eggs in Aug. Fecundity showed a seasonal pattern reflecting the fluctuations in chlorophyll concentration, but the spring increase may be a response mainly to increasing temperature. This dependency on food level and temperature was confirmed by egg production in cohorts kept at different conditions in the laboratory. Females reared in the laboratory at 5 °C were less productive than hibernating females in the sea at the same temperature.A mathematical model indicated that the three abundant spring/summer generations can maintain a stable population density at the observed levels of daily fecundity, if the mortality level is about 0.10 d<sup>-1</sup> before June, and 0.06 d<sup>-1</sup> thereafter. The tenfold increase observed in the first generation is possible at a mean mortality rate of 0.07 d<sup>-1</sup> It is conceivable that the spring increase in number is the result of the high fecundity and a relatively low level of mortality .The summer decline starting during the second generation will be a resuIt of the reduced fecundity, but also requires an increase of mortality rate to values beyond 0.10 d<sup>-1</sup>. Low egg production rates in summer seem insignificant, but may nevertheless be essential for the pelagic population to persist during summer and the subsequent hibernation period. The possible role in population persistence of resting eggs accumulating in the bottom sediment, and egg production at low temperature and food levels in early spring, is discussed.","AbstractOtherLang":null,"BibLvlCode":"AMS","StandardTitle":"Fecundity as a factor controlling the seasonal population cycle in <i>Temora longicornis</i> (Copepoda, Calanoida)","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2025-07-02 08:33:14.980000","timezone_type":1,"timezone":"+00:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":1989,"MonPub":null,"DateUpdate":"2003-09-05","DateCreate":"2002-09-11","SecASFANote":null,"ConfID":null,"PeerRev":0,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":0},"refs":null,"anarec":{"AnaID":27047,"PubliDate":1989,"Pagination":"83-90","XtraPublOfAnaID":null,"ISBN":"87-85215-15-5","Volume":"23","Issue":null,"BRefMon":26852,"BRefMonRR":"<b>Ryland, J.S.; Tyler, P.A. (Ed.)</b> (1989). Reproduction, genetics and distributions of marine organisms: 23rd European Marine Biology Symposium, School of Biological Sciences, University of Wales, Swansea, 5-9 September 1988. <i>European Marine Biology Symposia</i>, 23. Olsen & Olsen: Fredensborg. ISBN 87-85215-15-5. VIII, 469 pp.","BRefXtra":null,"BRefXtraRR":null,"SerBRefID":20275,"SerRR":"European Marine Biology Symposia.","StandardTitleSer":"European Marine Biology Symposia","ISSN":null,"AbbrevSer":null,"StandardTitleMon":"Reproduction, genetics and distributions of marine organisms: 23rd European Marine Biology Symposium, School of Biological Sciences, University of Wales, Swansea, 5-9 September 1988","StartPage":83,"Pages":8,"ToPubliDate":null,"BRefBibLvlCode":"MS","SerNotes":null,"AutString":"Ryland, J.S.; Tyler, P.A. (Ed.)"},"monrec":null,"serrec":null,"relations":null,"relationsRev":null,"addrec":{"Line1":"P.O. Box 59","Email":null,"Line2":null,"EnvName":"Netherlands"},"othpubs":null,"ownerships":null,"authors":[{"AutName":"Fransz","Firstname":null,"Initials":"H.G.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":27047,"AutID":4844,"OrderNr":1,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Gonzalez","Firstname":null,"Initials":"S.R.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":27047,"AutID":9315,"OrderNr":2,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Klein Breteler","Firstname":null,"Initials":"W.C.M.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":27047,"AutID":11387,"OrderNr":3,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null}],"mapdetails":null,"datasets":null,"monographs":null,"monparts":null,"serparts":null,"BEntOpen":null,"BEntPrivate":null,"availability":null,"litstyles":[{"LitStyID":3,"Style":"Conference paper"}],"thespers":null,"arch2discl":null,"SERpubls":null,"MONpubls":[{"PublName":"Olsen & Olsen","Place":"Fredensborg"}],"pictures":[],"thestermsPath":[{"ThesaurusTerm":"ANE, North Sea, Southern Bight","ThestID":182113,"Acronym":"ASFA_GEOT","ThesTermPath":"ANE, North Sea, Southern Bight"},{"ThesaurusTerm":"Persistence","ThestID":6093,"Acronym":"ASFA","ThesTermPath":"Persistence"},{"ThesaurusTerm":"Population dynamics","ThestID":9702,"Acronym":"ASFA","ThesTermPath":"Population dynamics"},{"ThesaurusTerm":"Fecundity","ThestID":3050,"Acronym":"ASFA","ThesTermPath":"Properties > Biological properties > Fecundity"},{"ThesaurusTerm":"Seasonal variations","ThestID":7329,"Acronym":"ASFA","ThesTermPath":"Temporal variations > Periodic variations > Seasonal variations"}],"thestermsASFA":[{"ThesaurusTerm":"ANE, North Sea, Southern Bight"},{"ThesaurusTerm":"Fecundity"},{"ThesaurusTerm":"Persistence"},{"ThesaurusTerm":"Population dynamics"},{"ThesaurusTerm":"Seasonal variations"}],"taxtermsASFA":[{"TaxTerm":"Temora longicornis (Müller, 1792)"}],"geotermsASFA":[{"GeoTerm":"Southern Bight"}],"collections":null,"conf":null,"proj":null,"Physdatasets":null,"spcols":{"222":{"SpName":"BMB - Belgische Mariene Bibliografie","SpColID":222,"ParSpColID":null,"TopParID":null,"ShortName":"BMB","URLLocation":null,"LibID":36,"OpenRepoFlag":null,"SpTypID":null,"TopParIDNotWebsite":null,"SpColPath":"BMB"}},"doi":null,"publs":null,"serparttypes":null,"monauthors":[{"AutName":"Ryland","Initials":"J.S.","CorporateFlag":0,"BEntID":26852,"AutID":3254,"OrderNr":1,"DegrID":null,"EditorFlag":1,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"AutStrTrunc":"Ryland, J.S.; Tyler, P.A. (Ed.)"},{"AutName":"Tyler","Initials":"P.A.","CorporateFlag":0,"BEntID":26852,"AutID":43618,"OrderNr":2,"DegrID":null,"EditorFlag":1,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"AutStrTrunc":"Ryland, J.S.; Tyler, P.A. (Ed.)"}],"MParts":null,"SParts":null,"hLibs":null,"langs":[{"BEntID":27047,"AbstractFlag":0,"LangID":15,"LangCode":"en","Lang":"English","DutchTerm":"Engels","LangCodeExtended":"eng"}],"urls":null,"thesterms":[{"ThesaurusTerm":"ANE, North Sea, Southern Bight","ThestID":182113,"Acronym":"ASFA_GEOT","ThesTypID":34,"ThesType":"ASFA Geoterms"},{"ThesaurusTerm":"Fecundity","ThestID":3050,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Persistence","ThestID":6093,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Population dynamics","ThestID":9702,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Seasonal variations","ThestID":7329,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"}],"taxterms":[{"TaxTerm":"Temora longicornis (Müller, 1792)","AphiaID":104878,"TaxtID":13329}],"geoterms":[{"GeoTerm":"Southern Bight","GeoObjectID":2399,"GeotID":395}],"othterms":null,"asfacodes":null,"asfa2codes":null,"thestermsFRIS":[{"ThesaurusTerm":"ANE, North Sea, Southern Bight","DutchTerm":null,"ThestID":182113,"Acronym":"ASFA_GEOT","ThesTypID":34,"ThesType":"ASFA Geoterms"},{"ThesaurusTerm":"Fecundity","DutchTerm":null,"ThestID":3050,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Persistence","DutchTerm":"Bestendigheid","ThestID":6093,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Population dynamics","DutchTerm":"Populatiedynamiek","ThestID":9702,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Seasonal variations","DutchTerm":"Seizoenale variaties","ThestID":7329,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"}],"taxtermsFRIS":[{"TaxTerm":"Temora longicornis (Müller, 1792)","DutchTerm":null,"AphiaID":104878,"TaxtID":13329}],"geotermsFRIS":[{"GeoTerm":"Southern Bight","DutchTerm":"Zuidelijke Bocht"}],"othtermsFRIS":null,"resmessage":"","complete":1,"sessions":{"newSesName":"Milh, Dominique, D.","newSesDate":{"date":"2002-09-11 14:27:16.653000","timezone_type":3,"timezone":"Europe/Brussels"},"updSesName":"VLIZ2000\\stevenc","updSesDate":{"date":"2003-09-05 08:56:45.800000","timezone_type":3,"timezone":"Europe/Brussels"}}}