摘要
海月水母（Aurelia）是世界性的大型灾害水母,其捕食强度与其体型规格密切相关,目前国内外尚未有关于其生长规律及水管系统的研究报道。本文以烟台海域海月水母（Aurelia sp.）为研究对象,通过室内受控实验,获得不同发育阶段的水母体,并对其伞径、腕长及体重的生长规律进行了研究;此外,本研究还对海月水母水管系统进行了详细地观察。结果表明,海月水母体重（W,单位g）与伞径（D：15~150 mm）呈幂函数关系;腕长（L,单位mm）与伞径（D,单位mm）呈线性关系。伞径生长曲线方程为：Dt=4×10-6t4-0.001 4 t3＋0.108 7 t2＋0.507 9 t＋9.428（R2=0.999 3）,式中,Dt为第t天水母伞径,单位mm,t为生长时间,单位d。海月水母初生碟状体出现主辐管与间辐管,3日龄时碟状体出现纵辐管,11日龄时出现环管和分离点。随着水母伞径的增长,水管系统的分离点数与聚合点数均逐渐增多,成熟时1/4伞部的分离点数最多,为66个,聚合点数亦最多,为32个。研究结果进一步完善了海月水母的基础生物学资料,可为海洋生物资源调查提供参考。
The scyphozoan Aurelia is a cosmopolitan species,which has caused lots of bad consequences. It has been reported that the predation intensity of Aurelia is related to its size. However,its growth model and radial canals development are both unclear. In this study,the growth models of the diameter,wrist length and medusae weight of Aurelia sp. in Yantai coastal area were studied under the laboratory condition. Moreover,the development of radial canals was also observed in details for the first time. Our results showed that medusae（ bell diameter from 15 mm to 150 mm） displayed a power function growth equation between weight（ W： g） and diameter（ D： mm）（ Fig. 1）,and a linear relationship between the wrist length（ L： mm） and diameter（ D：mm）（ Fig. 2）. The growth curve equation of diameter of Aurelia sp. is Dt= 4 × 10- 6t4- 0. 001 4t3＋ 0. 108 7t2＋ 0. 507 9t ＋ 9. 428（ R2= 0. 999 3）（ Dt： diameter of medusa at t days,unit： mm; t： growth time,unit： d,Fig. 3）. The perradial canals and interadial canals appeared in the newly released ephyrae（ Fig. 5a）. The adradial canals formed in the 3-day ephyrae（ Fig. 5c）. The ring canal formed in the 11-day ephyrae with the divergences（ Fig. 5f）. The number of convergences and divergences increased with the growth of medusae.Moreover,the maximum numbers of convergences and divergences in 1 /4 umbrella of mature medusae were 66 and 32,respectively（ Table 1）. The results are helpful for understanding the basic biology of Aurelia sp.,and provide the reference data for marine biological resources survey.
出处
《动物学杂志》
CAS
CSCD
北大核心
2014年第6期913-920,共8页
Chinese Journal of Zoology
基金
国家重点基础研究发展计划(973)项目(No.2011CB403605)
青岛市科技计划项目(No.11-3-1-6-hy)
黄海水产研究所基本科研业务费专项资金项目(No.20603022011008)
关键词
海月水母
生长
水管系统
聚合点
分离点
Aurelia sp.
Growth
Radial canals
Convergences
Divergences
