摘要
1998年 1 2月— 1 999年 1月在南极普里兹湾采用现场培养的方法对大、中型桡足类优势种尖角似哲水蚤 (Calanoidesacutus)、戈氏长腹水蚤 (Metridiagerlachei)和巨锚哲水蚤(Rhincalanusgigas)进行了实验研究 ,同时根据浮游动物垂直拖网的样品分析了它们的种群结构。结果表明 ,在实验中 ,C .acutus和M .gerlachei的平均产卵量分别为 1 3 3 (5— 49)和 5 (4—1 2 )个 /雌 /天 ;R .gigas没有产卵。随后对获得的卵进行连续观察 ,所有的卵均没有孵化。通过标本分析发现 ,C .acutus夏季的种群结构为双峰态 ,尤其是陆冰缘站 ,新生个体主要是CI期桡足幼体 ,而越冬个体包括CIV、CV和雌性成体。R .gigas的种群结构特征不明显 ,新生个体为 1 2月末发现的大量集中分布的无节幼体。M .gerlachei表现出和C .acutus相似的丰度分布特性 。
On the voyage of CHINARE-XV, three dominant copepod species Calanoides acutus, Rhincalanus gigas and Metridia gerlachei were incubated on board for egg-production and hatching success estimation during the austral summer of Antarctica. 13.3 (5-49) and 5 (4-12) eggs·female -1·day -1 on average were obtained, respectively, for C.acutus and M.gerlachei, and none for R.gigas. No egg was hatched successfully. The age structure of C.acutus was found bimodal. Special attention was paid to the population found beneath the ice, which includes two separate cohort, newly-generated cohort totally CI (26% of total number) and over-winter cohort comprising CIV (10%), CV (26%) and females (38%). Rhincalanus gigas had a more disperse age structure; nauplii was the only composition that can be recognized as the newly-born generation, and no spawn was observed. Metridia gerlachei comprised only late copepod stages, although it had a similar distribution pattern to Calanoides acutus.
出处
《海洋与湖沼》
CAS
CSCD
北大核心
2002年第2期196-202,共7页
Oceanologia Et Limnologia Sinica
基金
中国科学院九五重大项目A
K2 85 1 -A1 -2 0 5号
国家科技攻关资助项目
98-92 7-0 1 -0 2号
