Pottery a substrate for algal culture

The construction and use of pottery units designed for algal culture studies involving the transplanting of laboratory initiated stock is examined. Several types are described, either for direct attachment to shore rock or supporting vehicles. Pottery units are inexpensive, simple to construct, durable, inert and have good plant attachment qualities. Because of their small size, uniformity, ease in removal and reattachment, they greatly facilitate monitoring. Their use and behavior in the planting out of several marine algae, especially Enteromorpha spp. and Chondrus crispus is presented. Suitability for attached animal research is also indicated.