海洋纤毛虫巨大拟阿脑虫的实验生态学研究:初始密度及食物对其种群生长的影响  

EXPERIMENTAL ECOLOGY STUDIES ON THE MARINE CILIATE PARANOPHRYS MAGNA: EFFECTS OF DIFFERENT INITIAL POPULATION DENSITIES AND FOOD CONDITIONS ON THE POPULATION GROWTH

作　　者：张绍丽[1] 马洪钢[1] 宋微波[1] 

机构地区：[1]青岛海洋大学海水养殖教育部重点实验室,青岛266003

出　　处：《海洋与湖沼》2001年第6期641-646,共6页Oceanologia Et Limnologia Sinica

基　　金：国家自然科学基金资助项目 ( 39970 0 98号 );高等学校骨干教师资助计划联合资助

摘　　要：采用实验生态学方法 ,就不同初始种群密度及食物密度等因素对海洋纤毛虫巨大拟阿脑虫 (隶属纤毛门 ,盾纤目 )的种群自然增长率 (r)及世代时间 (G)的影响进行了探讨。结果表明 ,初始种群密度与r值呈负相关 ,与G则呈正相关 ,初始密度为 1ind ml时 ,r值达最大值 2 6 1 d,G值则为最小值为 0 2 9d ;r值随食物密度的增大而增大 ,当食物密度为 2 8E +0 8ind ml时 ,r值达最大值为 2 0 7 d。The effects of different initial population densities and food conditions on the natural rate of increase in the population ( r ) and generation time ( G ) of the marine ciliate Paranophrys magna (Ciliophora, Scuticociliatida) were studied using experimental ecological methods. The results revealed that (1) the relationship between the initial population density and r is negatively correlated while the G is positive (at the water temperature 22℃ the values of r varied between 1.19/d and 2.38/d corresponding to G : 0.29-0.58d in pure cultures with the initial population densities being 1, 10, 50 and 100 ind/ml, respectively); and (2) the values of r increased with an increase in food density until it reached the maximum value ( r =2.07/d) when the food density was 2.8E+08 ind/ml. Based on the results obtained from our present investigations, two different measuring methods for r were discussed; a simplified method is shown to be reliable when the initial conditions are fixed in the monofactorial experiment.

关 键 词：巨大拟阿脑虫 种群自然增长率 世代时间 实验生态学 海洋纤毛虫 初始密度 

分 类 号：Q959.11[生物学—动物学]