Vertical distribution of Calanus spp. and Metridia longa at four Arctic locations
Vertical distribution of Calanus spp. and Metridia longa at four Arctic locations
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DOI：
10.1080/17451000801907948
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发表时间：
2008-01-01
影响因子：
1.1
通讯作者：
Vogedes, Daniel
中科院分区：
文献类型：
--
作者：
Daase, Malin;Eiane, Ketil;Vogedes, Daniel
本文对斯瓦尔巴群岛周边4个地点的秋季垂直分布进行了调查，其中包括Calanus finmarchicus、C. glacialis、C. hyperboreus和Metridia longa。古大桡足动物一般位于较深的水体中。站间垂直分布的差异部分反映了南北向的发展梯度，南部地区的古阶段丰度较高。C. finmarchicus和M. longa的观测结果与发育阶段根据一定的光强偏好分布的假设相一致，四个地点的不同光学性质可能影响了垂直分布。长蛸只在老年发育阶段有垂直迁移，而幼期长蛸昼夜都在深水区活动。死亡率指数表明，非迁徙性大鲵的死亡率高于迁徙性大鲵。
We investigated the vertical distribution of Calanus finmarchicus, C. glacialis, C. hyperboreus and Metridia longa at four locations around the archipelago of Svalbard in autumn. The older and larger copepodites of Calanus spp. were generally located deeper in the water column. Differences in vertical distribution between stations partly reflected a south-north gradient in developmental progress with higher abundance of older stages in the southern locations. The C. finmarchicus and M. longa observations were consistent with the hypothesis that the developmental stages distributed according to certain preferences for light intensity, and different optical properties at the four locations are likely to have affected the vertical distributions. Diel vertical migration was only observed for older developmental stages of M. longa while young stages of M. longa remained in deep waters both day and night. A mortality index indicated that non-migrating Calanus spp. suffered higher mortality than migrating M. longa.