1. Title: 17.1 Dolphins, Porpoises and Pinnipeds.
Table of Contents
Title: 17.1 Dolphins, Porpoises and Pinnipeds.
Page #: 88
Date: 3/26/13

2. Objective
Students will be able to compare and contrast whales, porpoises and dolphins.
Students will be able to compare and contrast sea lions and seals.

3. Word of the Day
Bycatch: Unwanted marine creatures that are caught in the nets while fishing for another species; "thousands of dolphins and porpoises and whales are killed as part of the by-catch each year."

4. Dolphins and Porpoises
Small Toothed Whales.
Curious and easily trained.
Swim in schools and very fast.
Have been used by Navy to locate mines.
Found in Temperate to tropical waters.
May swim up rivers.
1990 U.N. reported that over 1 million of them die as by-catch. Caught in nets intended to catch other species.
Pg. 420

6. Dolphin By-catch

7. Seals and Sea Lions Pg. 420 Seals and Sea Lions
Pinnipeds: “Feather Footed” – named for their flippers.
Marine mammals that spend a lot of time on land: beaches, caved, ice floes.
Found in tropics to poles.
True Seals: Seals without external ears and with torpedo-shaped bodies. Have to wriggle like worms to move on land.
Monk Seal
Harbor Seal
Harp Seal
Weddel Seal
Leopard Seal
Elephant Seal
Seals and Sea Lions
Pg. 420

8. Seals and Sea Lions
Seals and Sea Lions
Sea Lions (Northern Fur Seals): Have ears, long necks, supple forelimbs tipped with broad flippers – used for walking and to hold the body in partially erect position on land. Pg

9. Sea Lion
Seal

10. Sea Lions
Sea lions have ear flaps and use their front and rear flippers to move on land.

11. Harbor Seals
Seals do not have ear flaps and their front flippers are too small to help them move on land. The rear flippers also do not serve as feet on land.

12. Seals and Sea Lions
Seals may make long migrations and congregate during the spring and summer at specific locations for breeding.

13. Seals and Sea Lions
Hunting of Seals: 19th and early 20th century - hunted for furs and oil.
Many species were killed to almost extinction, but are now protected.

14. Harbor Seal (We have them in the Boston Harbor)

15. Fort Point
(Southie is to the Right)
Downtown is to the Left

16. Leopard Seals are carnivorous.

17. Elephant Seals have large, pendulum noses.