2020 Small World in Motion Competition

Developing freshwater snail embryo, inside the egg

Eric Lind

Location
Delmar, New York, USA
Technique
Darkfield
Magnification
4X, 10X and 40X (Objective Lens Magnification)

Eric Lind’s main career is with Audubon, New York, specializing in bird conservation and wildlife biology. An avid photomicrography hobbyist (and talented one), Mr. Lind captured this fascinating sequence of a developing larval freshwater snail inside its egg. Filming developing embryos can be especially tricky because as the embryo grows, it can literally expand quickly out of the frame of the image, necessitating the need for changes in magnification mid-movie. The snail image beautifully shows the tiny eyespots, heartbeat and mouth and for Mr. Lind, illustrates the fragility and vulnerability of wildlife in a human dominated world.

Ciliates (Vorticella sp. and Paramecium sp.)

Roland Gross

Location
Gruenen, Switzerland
Technique
Differential Interference Contrast
Magnification
10X (Objective Lens Magnification)

Mr. Roland Gross, a microscopy enthusiast and hobbyist, captured this movie of ciliates (Voriticella and Paramecium) foraging for food with Differential Interference Contrast (DIC) microscopy. The stalked ciliates attach themselves to substrates and utilize hair like organelles called cilia to direct passing nutrients into their mouth. By contrast, the Paramecium (shown as a “slipper” looking organism) uses its cilia for movement and sensation while it feeds. Movies such as this are especially difficult to capture because limited depth of focus can make keeping these active creatures in focus for any length of time nearly impossible. Recent advancements in high-end research microscopes help lock the focus on the subject matter, but it is not yet commonly available for non-research applications.

Two larvae of a parasitic flatworm (Platyhelminthes)

Rafael Martín-Ledo

Affiliation
IES Leonardo Torres Quevedo
Biología y Geología
Santander, Cantabria, Spain
Technique
Phase Contrast
Magnification
10X (Objective Lens Magnification)

Two larvae of parasitic flatworm are captured here, seemingly interacting in what might be arguably displayed as complex interactive behavior between the two creatures. It brings to light the fact that, albiet it rare, complex interactions between microscopic creatures do exist. Capturing this wonderful exchange between the two organisms is especially difficult since Mr. Martin Ledo needed to use extreme care when isolating them to assure they are not damaged or change their morphology. This movie was captured using phase contrast microscopy.