{"refrec":{"BRefID":4863,"RR":"<b>Kremer, P.</b> (1976). Excretion and body composition of the ctenophore <i>Mneniopsis leidyi</i> (A. Agassiz): comparisons and consequences, <b><i>in</i></b>: Persoone, G. <i>et al.</i> (Ed.) <i>Proceedings of the 10th European Symposium on Marine Biology, Ostend, Belgium, Sept. 17-23, 1975: 2. Population dynamics of marine organisms in relation with nutrient cycling in shallow waters.</i> pp. 351-362","BEntID":4863,"PublicFlag":1,"CheckedFlag":0,"wosflag":0,"vabbflag":0,"RefStringPartII":", <b><i>in</i></b>: Persoone, G. <i>et al.</i> <i>Proceedings of the 10th European Symposium on Marine Biology, Ostend, Belgium, Sept. 17-23, 1975: 2. Population dynamics of marine organisms in relation with nutrient cycling in shallow waters. European Marine Biology Symposia,</i> 10(2): pp. 351-362","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Kremer, P.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Kremer, P.","Englishabstract":"Analyses of the body composition of <i>Mnemiopsis leidyi</i> demonstrated that the dry weight comprised less than 4 % of the wet weight, and contained about 80 % ash and 1.7 % carbon. The elemental carbon: nitrogen: phosphorus ratio (by atoms) of the tissue was 122: 31: 1. In the excretion products, the corresponding ratio was 36.5:7.4:1 for the dissolved inorganic- and 46.7:11:1 for total dissolved compounds. Inorganic nitrogen, exclusively ammonia, made up about 54 % of the release of total dissolved nitrogen. Similarly, the release of carbon dioxide was only slightly more than the release of dissolved organic carbon. By contrast, reactive phosphorus comprised about 80 % of the total dissolved phosphorus. These ratios remained fairly constant for all temperatures (10.3-24.5 °C) and various sizes of organisms tested. The enrichment of excreted phosphorus relative to the body composition was probably the consequence of the ingestion of zooplankton with a lower body N:P ratio. The calculated impact of the peak summer biomass of <i>Mnemiopsis</i> on nutrient turnover in the water column, was greatest for ammonia, representing 0.25-25 % turnover/day. During the late summer, the ctenophores are one of the major nutrient recyclers in Narragansett Bay, and through their voracious feeding (zooplankton) and excretion, they may significantly stimulate primary production.","AbstractOtherLang":null,"BibLvlCode":"AMS","StandardTitle":"Excretion and body composition of the ctenophore <i>Mneniopsis leidyi</i> (A. 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