亚热带浅水湖泊中两种裸腹溞生活史特征的比较  

Comparison on life history traits of two Moina species from shallow lakes in subtropical China

作　　者：张菲云 王梓燕 李军 曹雅芹 戚惠颖 孙雨琛 张婷婷 邓道贵[1] ZHANG Fei-yun;WANG Zi-yan;LI Jun;CAO Ya-qin;QI Hui-ying;SUN Yu-chen;ZHANG Ting-ting;DENG Dao-gui(School of Life Science,Huaibei Normal University,Huaibei 235000,Anhui,China)

机构地区：[1]淮北师范大学生命科学学院,安徽淮北235000

出　　处：《生态学杂志》2020年第5期1583-1589,共7页Chinese Journal of Ecology

基　　金：国家自然科学基金项目(31370470和31870451)资助。

摘　　要：以来自武汉南湖的远东裸腹溞和江苏太湖的微型裸腹溞为对象,在温度为(25±1)℃、食物条件为2×10^5cells·mL^-1斜生栅藻下,研究了两种裸腹溞的体长、成熟时间、存活率、寿命和产幼溞数等生活史参数。结果表明:两种裸腹溞的体长均随着龄数增加呈现递增的趋势;远东裸腹溞的成熟时间(P=0.008)和首次产幼溞时间(P=0.022)均显著小于微型裸腹溞,而其成熟体长(P<0.001)、寿命(P=0.003)和首次产幼溞数(P<0.001)均显著大于微型裸腹溞;远东裸腹溞和微型裸腹溞的内禀增长率分别为0.73和0.49 ind·d^-1;Pearson相关性分析显示,远东裸腹溞(r=0.659,P=0.008)和微型裸腹溞(r=0.649,P=0.009)的首次产幼溞数与成熟体长间均呈极显著相关;江苏太湖的微型裸腹溞的成熟时间长,而武汉南湖的远东裸腹溞的生殖能力更强,这可能与两种裸腹溞的遗传结构及它们对环境适应等差异有关。The life history parameters(e.g.body length,time to maturation,survival rate,lifespan and the number of offspring)of Moina weismanni from Lake Nanhu in Wuhan(Hubei Province)and Moina micrura from Lake Taihu in Jiangsu Province were examined under 2×10^5 cells·m L^-1 Scenedesmus obliquus at(25±1)℃.The results showed that body length of both Moina species showed an increasing trend with increasing instar number.Time to maturation(P=0.008)and the first reproduction time(P=0.022)of M.weismanni were significantly lower than those of M.micrura,whereas body length at maturity(P<0.001),lifespan(P=0.003)and the number of offsprings at first reproduction(P<0.001)of M.weismanni were significantly higher than those of M.micrura.Innate rate of increase was 0.73 ind·d^-1 for M.weismanni and 0.49 ind·d-1 for M.micrura.Results from Pearson correlation analysis showed that there were significant relationships between the number of offspring at first reproduction and body length at maturity for both M.weismanni(r=0.659,P=0.008)and M.micrura(r=0.649,P=0.009).Our results suggested that M.micrura from Lake Taihu had a longer time to maturation,whereas M.weismanni from Lake Nanhu had a stronger reproductive ability,which might be related to differences in their genetic structure and adaptation to environmental factors in two lakes.

关 键 词：微型裸腹溞 远东裸腹溞 生活史特征 内禀增长率 浅水湖泊 

分 类 号：Q958[生物学—动物学]