my hunting for daphnia, numerous other micro-organisms are also
captured. This particular instance was a collection made at a
pond in Ligonire, PA (UMT 17 657547E 4462831N). At first glance,
there did not appear to be
anything particular in the collection bottle; but after several days of
sitting, a fair bit of life became apparent (daphnia, copepods,
ostracods, volvox, stentors). I find that letting
a bottle sit for several days always produces good results (unless
hydra or other predators are present, which will consume the other
On first visual inspection, the vorticella appeared as a small patch of fungus, about 8mm in diameter. However, when the bottle was moved, the colony would contract - definitely evidence this was not fungus.
are a small ciliate, filter feeders. While they often appear as a
colony, they are not a true colony. Rather than a single shared
stalk, every individual has its own stalk; and may thus separate from
the group and move about on its own.
were collected via my usual
method of a cup on the end of a pole. The contents are then filtered through silkscreening cloth to
concentrate the findings. The collection was transported and
maintained in a re-cycled 0.5 liter drinking water bottle.
were placed on a slide, with the coverslip elevated by several
fragments of broken coverslip. Darkfield illumination was used.
Comments to the author,
Webb, are welcomed.
Vorticella 'colony' 10x, resized to 640x480.
100x, image cropped but not resized.
400x, image cropped but not resized.
from Guide to Microlife, by
Kenneth G. Rainis and Bruce J. Russell, Franklin Watts, Danbury,
Connecticut (USA), 1996, ISBN 0-531-11266-7; this is a good, basic
reference, a lot of information without being too technical.
Microscope: Bauch & Lomb monocular, 10x ocular, 4x, 10x and 40x objectives.
Camera: Kodak 3200 Digital, best mode 1152x864.
Software: Photoshop Elements.
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