AQUACULTURE

 

All images and text according to Aids to the Recognition of Fresh-Water Algae, Invertebrates, and Fishes
Physarum
Physarum
length variable, a true slime mold; amoeba-like cells fuse to form multinucleate plasmodium followed by stalk sporangia.
Dictyostelium
Dictyostelium
length variable, a cellular slime mold; cells of plasmodium distinct, developing into a single sporangium.
Prorodon
Prorodon
length 30-130 , a typical, primitive ciliate.
Coleps
Coleps
length 50-110 , many species, characteristic plates covering the body.
Lacrymaria
Lacrymaria
length 500-1,200 , Anterior end extensible and highly flexible.
Dileptus
Dileptus
length 250-500 , many species; with neck-like extension of the body.
Chilodonella
Chilodonella
length 50-150 , common surface scum of stagnant pools. Also see, Chilodonella and it's role as a parasitic protozoan.
Didinium
Didinium
length 80-200 , predacious on Paramecium.
Colpoda
Colpoda
length 40-110 , in stagnant pools among decaying vegetation.
Paramecium
Paramecium
length 100-350 , many species, very common. See this entry, on Paramecium with photographs and videos.
Frontonia
Frontonia
length 150-600 , among filamentous algae.
Urocentrum
Urocentrum
length 50-80 , among pond vegetation.
Blepharisma
Blepharisma
length 80-200 , often pinkish in color; in decaying vegetation.
Spirostomum
Spirostomum
length 1000-3000 , one of the largest protozoans, highly contractile.
Stentor
Stentor
length 1000-2000 , attached or free-swimming; trumpet-like in shape.
Metopus
Metopus
length 90-140 , in decaying vegetation.
Oxytricha
Oxytricha
length 50-250 , with marginal rows of cirri.
Euplotes
Euplotes
length 90 , with isolated groups of compound cilia (cirri).
Urostyla
Urostyla
length 200-600 , many species; numerous rows of cirri.
Halteria
Halteria
length 25-50 , performs bouncing movements. Common in pond water infusions.
Codonella
Condonella
length 60-70 , body pot-shaped, sharply divided into collar and bowl; collar without spiral structure.
Vorticella
Vorticella
length 135-150 , attaches to substrate by contractile stalk; with free swimming stage. See Vorticella on its role as a parasitic protozoa.
Cothurnia
Cothurnia
length 70-100 , often in gills of crayfish. Attaches to substrate by short stalk.
Epistylis
Epistylis
length 50-250 , colony of many individuals united in a multistalk, not contractile; same species occurs on crayfishes and turtles. See Epistylis for its role as a parasitic protozoa.
Zoothamnium
Zoothamnium
length 250 , colony of many individuals united in a common stalk; contracts as unit; colonies several mm high. See Zoothamnium for its role as a parasitic protozoan.
Podophyra
Podophyra
length 10-100 , with sucking tentacles, stalked; close to Tokophyra.
Tokophyra
Tokophyra
length 50-175 , with free swimming ciliated young; adult stalked, non-ciliated, and bears sucking tentacles.
Loxodes
Loxodes
length 700 , strongly compressed. Brownish.
Carchesium
Carchesium
length 100-125 , many species; forms stalked colonies in which individuals contract separately; some are attached to plants and animals.
Stylonchia
Stylonchia
length 100-300 , many species.
Ichthyophthirius
Ichthyophthirius
length 100-1000 , causes "white-spot" or "Ich" disease of fish in aquaria and fish hatcheries.

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