Abstract
Polyester resin is very useful for studying the burrows of benthic animals. A simple method of making resin casts of burrows, both tidal and subtidal, is introduced here. A transparent wide tube made from a plastic, soft drink, bottle is driven into the mud surface surrounding a burrow opening. A clear polyester resin containing accelerator and wax is mixed with catalyzer at a 0.5-1.0 %(v/v) concentration in a polyethylene bag in a pail, air is removed from the bag and its opening is fastened tightly. Then the resin is poured from a cut corner of the bag into the plastic tube over the burrow opening until the burrow is full. After hardening the cast can be dug out from the bottom and both adhesive bonding of broken casts and trimming of extraneous parts can be carried out.
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