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Although most of the more than 5,000 known sponges are found in marine environments, 150 species live in freshwater. Freshwater sponges are pitted with pores and often are yellow, brown or greenish. Sponges filter large volumes of water through their pores, ... Common Name: Freshwater sponge and bryozoans...
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www.ecy.wa.gov/programs/wq/plants/plantid2/descriptions...
www.ecy.wa.gov/programs/wq/plants/plantid2/descriptions/bryozoan.html
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Like many other lower animals, sponges have remarkable powers of regeneration. Even when ground up and squeezed through a cloth the minute fragments creep together in a dish of water and rebuild a new sponge. In autumn freshwater sponges die after they form little thick-shelled, seed-like bodies called gemmules.
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www.newton.dep.anl.gov/natbltn/400-499/nb448.htm
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Freshwater sponge colonies have numerous microscopic holes through which water passes into the sponge, and a few large holes through which water leaves. ... The Xerces Society has profiled a rare freshwater sponge endemic to western Montana and known only from three lakes, Ephydatia cooperensis...
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www.xerces.org/freshwater-sponges/
www.xerces.org/freshwater-sponges/
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Montana Field Guide contains a wealth of information about Montana's diverse species. ... Peterson and Addis 2000). The sponge is also non-gemmulating, overwintering in a regressed state in which choanocyte chambers are reduced in number (Peterson and Addis 2000). ... Species - A Freshwater Sponge - Ephydatia cooperensis...
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fieldguide.mt.gov/detail_IZSPN14010.aspx
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What's that stuff in the water? Aquatic plants and animals can appear as green hairlike strands, green cotton candy, orange slime of fluff, jelly-like strands or blobs, green finger-like spongy clumps, fuzzy, mossy blobs, swimming red specks and slimy spheres. ... More sponge info from Washington State Department of Ecology...
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www.umaine.edu/WaterResearch/FieldGuide/inthewater.htm
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on freshwater sponges. Gut content analyses of Orconectes revealed spicules ... of the freshwater sponge Spongilla lacustris, I discovered that crayfish may ...
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www.jstor.org/stable/2424921
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In 35 years of looking at freshwater fauna I have to admit that I'd found nothing quite like it. I puzzled over it for a while and then had a stroke of inspiration: I believe it's a freshwater sponge gemmule.
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www.nhm.ac.uk/hosted_sites/quekett/Others/Ken-Jones-fin...
www.nhm.ac.uk/hosted_sites/quekett/Others/Ken-Jones-find.html
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In response to mechanical stimuli the freshwater sponge Ephydatia muelleri (Demospongiae, Haplosclerida, Spongillidae) carries out a series of peristaltic-like contractions that is effective in expelling clumps of waste material from the aquiferous system.
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jeb.biologists.org/cgi/content/abstract/210/21/3736
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Coordinated contractions effectively expel water from the aquiferous system of a freshwater sponge; J Exp Biol Elliott and Leys 210: 3736 ... S1. Uptake and clearing of inedible ink by a 7-day-old sponge. (A) Prior to addition of ink the choanosome (cho) is white, the yellow gemmule husk (g) is in the centre of the sponge,
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jeb.biologists.org/cgi/content/full/210/21/3736/DC1
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