Pets Animals Lover Information World

 
pets and animals pic

Welcome Guest

Search:

Seals and Sea Lions

View PDF | Print View
by: Admin75
Total views: 405
Word Count: 232
Date: Sat, 4 Nov 2006 Time: 12:00 AM
0 comments

Scientists call true seals, eared seals, and walruses "pinnipeds"—literally, "feather-foot."

Eared seals (sea lions and fur seals) differ from true seals in having external ear flaps and the ability to use their flippers for walking on land. Also, eared seals tend to use their front flippers for power while swimming; true seals use their rear flippers.

Pinnipeds, which arose from land mammals, have evolved slick, torpedo-shaped bodies ideal for gliding through water.

Seals such as the gray seal (Halichoerus grypus) can sleep underwater, and can even surface to breathe without awakening.

California sea lions (Zalophus californianus), which live off the Pacific coast, from British Columbia to Baja California, come ashore in huge groups from May to August. Males fight to establish territories on the beach, then maintain the boundaries with displays of barking, head-shaking, and ritualized fighting. Females come ashore shortly after the males to give birth to pups conceived the previous season. Each bull then mates with as many females in his territory as possible.

Zoo scientists discovered that hooded seals (Cystophora cristata) nurse for only four days—the shortest known lactation period of any mammal. Drinking milk that is 60-percent fat, each pup consumes about 65,000 calories a day, gaining 60 pounds and doubling its birth weight before weaning.

About the Author

From the Smithsonian National Zoological Park


Rating: 5.0

Comments

No comments posted.

Add Comment

You do not have permission to comment. If you log in, you may be able to comment.

Recommend This Page To A Friend!




YES! I want to claim my free instant access to the Secrets to Dog Training 6 Day Dog Behavior and Training course ($27 value).

Your Name:  Secrets to Dog Training Free 6 Day Course
Your email Address:
(This is a private and fully protected mailing list. You can unsubscribe at any time).

pets and animals information counter

Copyright © 2010 Pets Animals Lover Information World - Trademark of Relationships Unlimited, LLC