Two methods are used to examine feeding strategies in graploloids; the first profiles different sets of zooids on the colony, the second treats the colony as a whole. Both of these techniques have advantages. The choice between them brings into question our concepts of the degree of coloniality shown by graptoloids. Using a whole colony model. graptoloids can be shown to have sampled the water with variable efficiency. as defined in this paper. Planar forms were relatively inefficient, generally sampling less than 10% of the available water. Inclined forms frequently approached 75% efficiency. Biserial forms and strdight monograptids roulinely exceeded 100%. sampling each unit of water more than once. Rotation of the rhabdosome during movement increased the efficiency of horizontal and inclined forms. It reduced the efficiency of scandent biserials and straight monograptids. These were both advantageous effects. Astogenetic changes in colony size and form would have had a profound effect on feeding efficiency.□Graptoloid, ecology, astogeny

中文翻译：

---

Graptoloid 取食效率、轮作和繁殖

有两种方法用于检查 graploloids 的饲养策略；第一个描述了殖民地上不同组的zooids，第二个将殖民地视为一个整体。这两种技术各有优势。它们之间的选择使我们对石墨烯所显示的殖民程度的概念产生疑问。使用整个殖民地模型。可以证明 graptoloids 以可变的效率对水进行采样。如本文所定义。平面形式的效率相对较低，通常采样不到可用水的 10%。倾斜的形式经常接近 75% 的效率。Biserial 形式和 strdight monograptids 大约超过 100%。对每个单位的水进行多次采样。运动过程中横纹体的旋转提高了水平和倾斜形式的效率。它降低了 scandent bisserials 和直 monograptids 的效率。这都是有利的效果。群体大小和形式的遗传变化会对饲养效率产生深远的影响。□Graptoloid，生态学，astogeny