Evolution de la constitution chimique elementaire de Pontella mediterranea au cours des dernieres generations annuelles dans le golfe de Marseille |
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| Authors: | Champalbert Gisele; Kerambrun Pierre |
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| Institution: | Laboratoire d'Hydrobiologie marine et Laboratoire associé au CNRS n° 41, Faculté des Sciences de Luminy 70, route Léon Lachamp, 13288 Marseille Cedex 9, France |
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| Abstract: | Elementary chemical composition in carbon, hydrogen and nitrogenof the Pontellid Copepod Pontella mediterranea was studied on148 males and 146 females from automnal populations of the gulfof Marseilles, which are the last annual generations. Data arecompared to those obtained from spring and summer. The increasein animal weight from the last generations is greater in femalesthan males. The dry weight ratio of females against males is 1.6 while it is only 1.4 in the previous generations. At theend of the natural biological cycle, C:N ratio shows a lightbut significant difference between males and females. The valuesof C:N ratio remain close to 3.4, which means that the observedincrease of animal weight on the last generations mainly proceedsfrom an increase in protein compounds. |
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