. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 578 O. ELLERS AND M. TELFORD. FIGURE 3. SEM micrographs of aboral miliary and club-shaped spines. Ciliary bands on some spines are clearly visible, arrows indicate those that are less conspicuous. Scale bar: 100 ^m. A) Two diametrically opposed bands on club-shaped spine; B) more oblique view of another club-shaped spine and bands of cilia on a miliary spine. flowed perpendicularly to the orientation of the ciliary bands, they were unidirectional and we never saw reversals of flow. Between spines on the aboral surface, parti
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 578 O. ELLERS AND M. TELFORD. FIGURE 3. SEM micrographs of aboral miliary and club-shaped spines. Ciliary bands on some spines are clearly visible, arrows indicate those that are less conspicuous. Scale bar: 100 ^m. A) Two diametrically opposed bands on club-shaped spine; B) more oblique view of another club-shaped spine and bands of cilia on a miliary spine. flowed perpendicularly to the orientation of the ciliary bands, they were unidirectional and we never saw reversals of flow. Between spines on the aboral surface, particles were carried to the ambitus by ciliary currents. The maximum size of particle (about 100 nm) that could be carried in this way is determined by the mean inter-spine distance (Mooi and Telford, 1982). In fact, even particles which were small enough to be transported between spines often bumped into them. This slowed their progress through the spine field and there was a negative correlation (; P 20 Mm) were carried out of the aboral current, coming to rest near the middle or tips of the fringe spines before dropping to the substrate. An estimated 80% of particles (by number) reaching the ambitus via ciliary currents were lost in this manner. It was not possible to determine what proportion, if any, of the small particles successfully passed around the ambitus and were sub- sequently ingested. They could not be carried to the mouth by oral surface ciliary currents. Capture of particles from aboral ciliary currents by ambital or oral surface podia was not seen. Nearly all podium-particle contacts were with particles lying on the floor of the aquarium, only rarely with suspended particles. Podia on the oral surface and at the ambitus picked up particles and pulled them. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
