{"refrec":{"BRefID":13182,"RR":"<b>den Hartog, J.C.</b> (1968). Onderzoek naar de invloed van de factoren temperatuur en saliniteit op de groei van de zeeanemoon <i>Metridium senile</i> L. <i>Interne verslagen Nederlands Instituut voor Onderzoek der Zee</i>, 1968(1). Nederlands Instituut voor Onderzoek der Zee: Texel. 57 pp.","BEntID":13182,"PublicFlag":1,"CheckedFlag":0,"wosflag":0,"vabbflag":0,"RefStringPartII":". <i>Interne verslagen Nederlands Instituut voor Onderzoek der Zee</i>, 1968(1). Nederlands Instituut voor Onderzoek der Zee: Texel.  57 pp.","DocTypID":13,"DocType":"Reports","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"den Hartog, J.C.","OrigTitleTranslFlag":1,"Authorstringtrunc":"den Hartog, J.C.","Englishabstract":"The influence of temperature and salinity on the growth of <i>Metridium senile</i> L. was examined. To this end artificial clones were obtained by making use of the regenerative power of disc tissue <i>Metridium</i>. As a criterion for growth the surface of the disc was used. It was found that the temperature optimum as well as the salinity optimum varied within certain limits for different individuals. At 11°/oo Cl a temperature optimum was found to occur round about 20°c and a maximum at about 24.5°C. For one clone an optimum was found at about 23°C. The minimum was found to lie somewhere below 5°C, but its exact position was not determined. At a temperature of 20°C a salinity optimum was found between about 14 and 16°/oo Cl for various clones. The minimum was found to occur between 8 and 10°/oo Cl. It is highly probable that the present distribution of <i>Metridium</i> in the Baltic is controlled by salinity. Because of insufficient data it could not be decided whether the absence of <i>Metridium</i> in the Mediterranean is due to high temperatures in summer, but this seems a very likely explanation. On the strength of the data obtained in this research there is no reason to assume that the difference in size between coast- and offshore animals is genetically fixed. For the present it seems better to hold the environment responsible.","AbstractOtherLang":"De invloed van temperatuur en saliniteit op de groei van <i>Metridium senile</i> L. werd nagegaan. Er werd gewerkt met op kunstmatige wijze verkregen klonen. Voor het verkrijgen van deze klonen werd gebruik gemaakt van het regeneratievermogen van de rand van de voetschijf van <i>Metridium</i>. Als maatstaf voor de groei diende het opp. van de voetschijf. Temperatuur- en saliniteitoptimum bleken individueel verschillen te kunnen vertonen. Voor 17 °/oo Cl werd een temp. optimum gevonden dat in de buurt van 20 °C lag, en een maximum van + 24,5 °C. Voor één kloon werd een optimum van ong. 23 °C gevonden. Het minimum bleek beneden 5 °C te liggen, maar werd niet bepaald. Bij 20 °C werd een saliniteitoptimum gevonden, dat voor verschillende klonen variëerde tussen ong.14 en 16 °/oo minimum bleek tussen 8- en 10 °/oo Cl te liggen. De huidige verspreiding van <i>Metridium</i> in de Oostzee wordt naar alle waarschijnlijkheid door de saliniteit bepaald. Op grond van onvoldoende gegevens kon niet vastgesteld worden of het ontbreken van <i>Metridium</i> in de Middellandse Zee te wijten is aan de hoge zomertemperaturen in dit gebied, wat zeer wel mogelijk lijkt. Er is geen reden om op grond van bij dit onderzoek verkregen gegevens aan te nemen, dat het verschil in afmetingen tussen kust en diepwaterdieren genetisch vastligt. Voor dit verschijnsel wordt daarom (voorlopig) het milieu verantwoordelijk gesteld.","BibLvlCode":"MS","StandardTitle":"Onderzoek naar de invloed van de factoren temperatuur en saliniteit op de groei van de zeeanemoon <i>Metridium senile</i> L","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":1968,"DateUpdate":"2025-07-15","DateCreate":"2001-07-12","SecASFANote":null,"ConfID":null,"PeerRev":0,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":1},"refs":null,"anarec":null,"monrec":{"MonID":13182,"ISBN":null,"PubliDate":1968,"IssueDate":null,"Volume":"1968","Issue":"1","Pagination":"57","Place":"Texel","Edition":null,"BRefXtra":null,"BRefXtraRR":null,"SerID":5036,"SerRR":"Interne verslagen Nederlands Instituut voor Onderzoek der Zee. 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