Pictures of the Lab Set up for the Crayfish Lab and Background on Crayfish.

(Metabolism and oxygen consumption in Crayfish)

Background

• Crayfish, also called crawfish or crawdad, are closely related to the lobster. More than half of the more than 500 species occur in North America, particularly Kentucky (Mammoth Cave) and Louisiana in the Mississippi basin. Crayfish also live in Europe, New Zealand, East Asia and throughout the world, including the Tristan da Cunha Islands. Nearly all live in freshwater, although a few survive in salt water. Crayfish are characterised by a joined head and thorax, or midsection, and a segmented body, which is sandy yellow, green, or dark brown in colour. The head has a sharp snout, and the eyes are on movable stalks. Crayfish are usually about 7.5 cm (3 inches) long.

• From: http://mackers.com/crayfish/

Anatomy of a Crayfish

http://www.enchantedlearning.com/cgifs/Crayfish_bw.GIF

Dissolved O2 meter

Experimental chamber Hot water bath

Ice bucket

Tank withlarge and Small crayfish

Large crayfishIn a holding container

The label on the tank says it all…