Caption: Blepharisma and dinoflagellates. Light microscope footage of ciliate protozoan Blepharisma sp. (centre) amongst dinoflagellates (motile green cells). Blepharisma species are single-celled filter-feeding protozoa that are found in freshwater. They feed on bacteria and decaying organic matter, which they filter through membranelles in their primitive mouth, known as a buccal cavity. When feeding conditions are good they can grow to an enormous size. Dinoflagellates are also unicellular protozoans. About 90 per cent are found in marine environments as plankton but they also occur widely in fresh water. They range in size from 2 millimetres to less than a hundredth of a millimetre across.

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Keywords: 20 seconds or greater, animalcule, biological, biology, blepharisma, cell, cilia, ciliate, cilium, dinoflagellata, dinoflagellate, fauna, flagella, flagellate, flagellum, fresh water, freshwater, internal structure, invertebrate, invertebrates, light, light microscope, light microscopy, lm, many, micro-organism, micro-organisms, microbe, microbiological, microbiology, microorganism, microorganisms, microscope, microscopic, multiple, nature, no-one, nobody, organism, plankton, planktonic, protist, protozoa, protozoan, single celled, single-celled, unicellular, wildlife, zoological, zoology

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Blepharisma and dinoflagellates

K005/3076 Rights Managed

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Duration: 00:00:23.16

Frame size: 1920x1080

Frame rate: 25

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Format: QuickTime, Photo JPEG 100%, progressive scan, square pixels

File size: 742.2M


Capture format: Canon EOS 5D Mark II

Codec: Apple ProRes 422

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