THE FEEDING OF CALANUS HELGOLANDICUS ON SYNCHRONOUSLY GROWING POPULATIONS OF THE MARINE DIATOM DITYLUM BRIGHTWELLII1
THE FEEDING OF CALANUS HELGOLANDICUS ON SYNCHRONOUSLY GROWING POPULATIONS OF THE MARINE DIATOM DITYLUM BRIGHTWELLII1
复制标题
赫尔戈兰哲哲对海洋硅藻 DITYLUM BRIGHTWELLII 同步生长种群的摄食1
DOI：
10.4319/lo.1969.14.5.0701
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发表时间：
1969
影响因子：
4.5
通讯作者：
Jane N. Rogers
中科院分区：
文献类型：
--
作者：
S. Richman;Jane N. Rogers
的哲水蚤helgolandicus的过滤率测量同步增长的种群的硅藻Ditylum brightwellii，以下细胞数量的变化，并通过测量的14 C标记的细胞在选定的时间间隔在2天内的摄入。通过选择合适的光周期和光照强度，将硅藻的生长调节为每天一次细胞分裂。当细胞分裂同步时，细胞分裂在黑暗中进行。
分别计算动物在单细胞和“配对”子细胞（分裂后分离前）上进食的过滤率。成对细胞的体积是单个细胞的1.5倍。在周期的亮部或暗部，单个细胞的过滤没有显著差异。在黑暗中或在存在高百分比配对的那些时间，配对细胞的过滤显著更高。在0和20%对之间，动物以50 ml桡足动物-1天-1的恒定速率过滤。在40%对以上，最大过滤率约为170 ml桡足类动物-1天-1。在20 - 40%对之间，过滤率与对的百分比成比例地增加，并且成对细胞的摄取与它们的浓度成指数地增加。
建议将C. Helgolandicus主动地搜寻和选择成对的细胞，而被动地过滤单个细胞。此外，这些数据支持的想法，有没有先天的昼夜摄食节律在这些桡足类。
The filtering rates of Calanus helgolandicus were measured on synchronously growing populations of the diatom Ditylum brightwellii, by following changes in cell numbers and also by measuring the ingestion of 14C labeled cells at selected intervals during 2-day periods. The growth of the diatoms was adjusted to be one cell division per day by selecting appropriate photoperiods and light intensities. When the alga was synchronized, cell division took place in the dark.
Filtering rates were calculated separately for animals grazing on single cells and on “paired” daughter cells (before separation after division). The volume of paired cells was 1.5 times that of the singles. There was no significant difference in the filtering of single cells in the light or dark part of the cycle. Filtering on paired cells was significantly higher in the dark or at those times when high percentages of pairs were present. Between 0 and 20% pairs, the animals filtered at a constant rate of 50 ml copepod−1 day−1. Above 40% pairs, there was a maximum filtering rate of approximately 170 ml copepod−1 day−1. Between 20–40% pairs, the filtering rate increased proportionally to the percentage of pairs, and ingestion of paired cells increased exponentially in relation to their concentration.
It is suggested that C. helgolandicus actively hunted and selected the paired cells and passively filtered the singles. In addition, the data support the idea that there is no innate diurnal feeding rhythm in these copepods.