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Colony-wide water currents in living Bryozoa
Cook, P.L.M. (1977). Colony-wide water currents in living Bryozoa. Cah. Biol. Mar. 18(1): 31-47
In: Cahiers de Biologie Marine. Station Biologique de Roscoff: Paris. ISSN 0007-9723, more
Peer reviewed article  

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  • Cook, P.L.M.

Abstract
    Colony-wide water current patters are described and analyzed. In encrusting forms, at least 3 methods of producing water currents are now known. In small colonies of Cyclostomata (Lichenopora), there is a single, centripetal, outwardly directed current outlet. in some Cheilostomata (Hippoporida) and Ctenostomata (Alcyonidium nodosum), 'monticules' are formed by groups of zooids where the tentacle crowns are absent, reduced in number, or do not feed. The monticules are the site of passive, outwardly directed current outlets. In other Cheilostomata (Schizoporella, Hippoporina and Cleidochasma) and Ctenostomata (Flustrellidra hispida), groups of zooids with heteromorphic tentacle crowns form' chimneys' which produce active outwardly directed current outlest. Some suggestions are made toward a sequence of observations on living colonies.

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