Resource: Unlikely Travel Companions
Media Type:
QuickTime Video
Length: 2m 04s
Size: 5.7 MB
Not all sharks are lonely hunters of the deep. Many sharks interact with smaller fish in symbiotic relationships. In contrast to their bloodthirsty stereotype, it is not unusual to find species of sharks that enjoy the company of other fish. This video segment from Nature explains the different relationships that sharks have with other marine animals.
Alternate Media Available:
Transcript (Rich Text Format Document)
Loading reviews...Teachers' Domain, Unlikely Travel Companions, published November 18, 2008, retrieved on ,
http://www.teachersdomain.org/resource/nat08.living.eco.ecos.travcom/
- Background Essay
- Questions for Discussion
- Standards
Print Background EssaySharks and their biological cousins, the rays, are among the highest-profile denizens of the deep. But sharks are not the solitary killing machines that popular movies and the press might have us believe. In their marine environment, sharks coexist with numerous other species - many of whom flock to be near the sharks, rather than running from them in fear. In many of these cases, the interaction between two different species mutually benefits each species. But humans, too, have become an increasingly important player in the lives of sharks - and as they are increasingly hunted for their fins, sharks are actually becoming more endangered than they are dangerous. The impact on the marine ecosystem that would result from the disappearance of sharks would be devastating, but there is still time to save these magnificent creatures, and the ecosystems that depend on their existence.
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See Also:
K-12 Subject:
Ecosystems
Lesson Plans Using this Resource:
Source: Nature: "The Secret World of Sharks and Rays"
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Major corporate support for the Nature collection was provided by Canon U.S.A. and SC Johnson. Additional support was provided by the Corporation for Public Broadcasting and the nation’s public television stations.