Vertical distribution and feeding ecology of a copepod Gaetanus variabilis in the southern Japan Sea during winter
Vertical distribution and feeding ecology of a copepod Gaetanus variabilis in the southern Japan Sea during winter
复制标题
日本海南部桡足类Gaetanus variabilis冬季垂直分布及摄食生态
DOI：
10.1093/plankt/fbw001
复制
发表时间：
2007
影响因子：
2.1
通讯作者：
T. Ikeda
中科院分区：
文献类型：
--
作者：
A. Yamaguchi;S. Ohtsuka;K. Hirakawa;T. Ikeda
在日本海南部的一个站位，研究了一种桡足类Gaetanus variabilis在冬季的垂直分布、肠道充满度和肠道内容物。C3-C6（成虫）G. variabilis分布在500 - 1000 m深度之间。虽然早期的桡足类阶段居住比老年人更深，没有昼夜垂直迁移检测到整个桡足类阶段。摄食活性G.根据肠道充盈度评分判断的variabilis随发育阶段/性别而变化，但未观察到昼夜摄食节律。成年雄性停止进食是其进食附属物退化的反映。肠道内容物分析表明，G. variabilis是一种颗粒摄食者，主要以硅鞭毛虫为食，其次是硅藻、锡壳类和后生浮游动物碎片。估计的日口粮G。根据计算的代谢率计算的Variabilis种群的平均代谢率为5.03mgCm ~（-2）·d ~（-1），占日本海南部500 m深度初级生产力的4.5%或颗粒有机碳通量的54%。
Vertical distribution, gut fullness and gut contents were investigated on an aetideid copepod Gaetanus variabilis during winter at a station in the southern Japan Sea. Most indi- viduals of C3-C6 (adult) G. variabilis were distributed between 500 and 1000 m depth. While early copepodid stages resided deeper than older ones, no diel vertical migration was detected throughout the copepodid stages. Feeding activity of G. variabilis as judged by gut fullness scores varied with developmental stage/sex, but no diel feeding rhythm was observed. Adult males ceasefeeding as a reflection of degeneration of their feeding appendages. The gut content analysis showed that G. variabilis is a particle feeder consuming mainly upon silicoflagellates, followed by diatoms, tintinnids and fragments of metazooplankton. An estimated daily ration of G. variabilis population based on calculated metabolic rates was 5.03mg C m~2day"1,which accounts for 4.5%of the local primary production or 54%of particulate organic carbon flux down to the 500m depths at southern Japan Sea.
北太平洋西部亲潮地区三种优势浮游介形类（Discoconchoecia pseudodiscophora、Orthoconchoecia haddoni 和 Metaconchoecia skogsberigi）的垂直分布和种群结构。
DOI：
--
发表时间：
2002
期刊：
Plankton Biol.Ecol. 49
影响因子：
--
作者：
Kaeriyama;H;T.Ikeda
通讯作者：
T.Ikeda
对海洋中中型浮游生物呼吸的全球评估。
DOI：
--
发表时间：
2005
期刊：
J.Plankton Res. 27
影响因子：
--
作者：
Hernandez-Leon;S;T.Ikeda
通讯作者：
T.Ikeda