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Crayfish Dissection Laboratory. Crayfish Ecology. Crayfish are found in streams, rivers, lakes and ponds where the water contains adequate amounts of calcium salts. They are primarily nocturnal, hiding in crevices and under rocks during the day and emerging to feed at night. - PowerPoint PPT Presentation
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Crayfish Dissection Laboratory
Crayfish Ecology Crayfish are found in streams,
rivers, lakes and ponds where the water contains adequate amounts of calcium salts.
They are primarily nocturnal, hiding in crevices and under rocks during the day and emerging to feed at night.
They will eat almost anything organic - plant or animal, living or dead.
External Anatomy
Sexing your crayfish
female male
female with eggs
Internal Anatomy
after removing the thorax…
Close up view under the cephalothorax.
tail dissection
detailed ventral view
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