Glacier Bay crabs lesson plans
Glacier Bay Crabs
Powerpoint presentation 4mb
The Dungeness crab (Cancer magister) is a popular shellfish that inhabits bays, estuaries, and the nearshore coast of Alaska. The Dungeness crab supports both a commercial fishery and a personal use fishery in Alaska.
Dungeness crabs are related to shrimp, lobster, and other crabs. They have a broad, oval body covered by a hard chitinous shell, four pairs of walking legs and a pair of claws. The Dungeness crab has short, small legs in relation to its body size and it has no spines on the top side of its carapace (shell).
This unit invites students to learn more about this interesting crustacean, especially those living in Glacier Bay National Park and Preserve. They will study the crab's life history, its range in the marine preserve of Glacier Bay and the effect closing the bay to commercial fishing has had on the animal's well-being. This unit is designed for grades 5-8. Activities and handouts usually will be written to upper elementary and lower middle school levels with some extensions to adjust for the younger and older students.
Crabs in Glacier Bay
Did You Know?
Instead of vocalizing to attract females, common snipe males have another method of drawing the attention of a potential mate. They spread their tail feathers diving downward. Air vibrates through the tail feathers creating an attractive, winnowing sound.