极地研究2000，Vol.12Issue(3)：183-190,8.
南极普里兹湾夏季边缘浮冰区两种主要浮游桡足类的代谢研究
METABOLISM OF TWO DOMINATING COPEPODS: CALANOIDES ACUTUS AND METRIDIA GERLACHEI IN THE MARGINAL ICE ZONE OF THE PRYDZ BAY, ANTACTICA IN SUMMER
摘要
Abstract
Metabolic rates (oxygen consumption and ammonia excretion) of two dominating copepods, Calanoides acutus and Metridia gerlachei , were measured during the austral summer (December 1998－January 1999), in the marginal ice zone of the Prydz Bay. The elemental composition (C and N) were also analysed on the specimens used in these metabolic experiments. The results showed that C. acutus was 48. 4%－48.60％00 of dry weight in carbon content and 6.1%－6.5 % of dry weight in nitrogen content. Metridia gerlachei was 47.1%－ 50. 1% and 5.9 %－ 7.4 %, relatively. Oxygen consumption rates of C. acutus were variant in the different areas (0. 226 to 0. 558μl O2mg-1h-1). And its ammonia excretion rates ranged from 0. 014 to 1. 058μg N mg-1h-1. The ratio between the rates (O:N) exhibited a large defference (5－6 times). For Metridia gerlachei, oxygen consumption rates were 0. 488－0. 644μl O2mg-1h-1 and ammonia excretion rates were 0. 015－0. 034μg N mg-1h-1. From the results of metabolic rate measuremts and elemental analyses, daily losses of body carbon and nitrogen were estimated to be 0.59% － 1.99% and 0. 44% － 3.27%, respectively. The metabolic carbon requirements represented about 0.6 %－ 29.2 % of primary production per day, and their excretion of ammonia contributed 0.2 %－ 38.0 % of daily phytoplankton nitrogen demand.关键词
Calanoides acutus Metridia gerlachei 代谢 普里兹湾 南极Key words
Calanoides acutus/Metridia gerlachei/metabolism/Prydz Bay/Antarctica分类
海洋科学引用本文复制引用
李超伦,孙松,张光涛,吉鹏..南极普里兹湾夏季边缘浮冰区两种主要浮游桡足类的代谢研究[J].极地研究,2000,12(3):183-190,8.基金项目
中国科学院95重大A(KZ951-Al—205)和国家科技攻关(98—927—0l—02)资助项目 （KZ951-Al—205）
