Make a dolphin

Life goes on forever like the gnawing of a mouse.

Edna St. Vincent Millay


The purpose of this activity is to create a 40 pound dolphin using a food chain with the following organisms:

Make the following assumptions:


How many pounds of each organism is needed to make a 40 lb adult dolphin?

How many pounds of diatoms?


How many pounds of copepods?


How many pounds of oysters?


How many pounds of crabs?


How many pounds of fish?











Hint 1:

Work backwards from the dolphin:









Hint 2:

Working backwards. Think about how much fish a dolphin needs.

Since only 10 percent of the material at each level is used to build the organism at the next higher level, it will take 400 pounds of fish to make one 40 pound adult dolphin.









Hint 3:

4 000 000 pounds of ________________;
400 000 pounds of ________________;
40 000 pounds of ________________;
4 000 pounds of ________________ and
400 pounds of ________________
to make one 40 pound ________________ .





Dr. Robert Sweetland's notes
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