EEMB 136L Lecture 9: Lab 9
15 Nov 2017
School
Department
Course
Professor
Document Summary
Each zooid has a retractable lophophore, which bears several ciliated tenacles used for filter-feeding (extended when animal is feeding, but retracted when it feels threatened) has u-shaped gut outside of it. Reproduce via sexual reproduction to form new colonies. Grow into a colony by budding with addition of zooids at the edges of the colony. Avicularia: act to discourage predation, settling larvae and move deposits of sediment. Vibracula: move the colony across the substrate; they walk. Bumps that rise above the surface of the rest of colony. Pass filtered water away from the colony to avoid interference with other zooids. Cheilostome zooids are able to coordinate water flow entirely with their soft parts so won"t see monticules in hard skeleton. Zooids are cylindrical and elongate and grow throughout life. Feeding zooids housed in long, circular tube f. Housed in short tube in which the operculum is hidden. Colony is usually lacy and sheet-like or fanlike.
