Spiny Dogfish Shark

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  • Topic: Shark, Squalidae, Spiny dogfish
  • Pages : 3 (951 words )
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  • Published : May 23, 2013
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The Spiny Dogfish Shark Lab Report.
BY: Jeremy Cotto
Purpose
We did this lab to further our understanding of Spiny dogfish shark anatomy and make the class more entertaining. People dissect organisms to find reasons for how they are able to do certain things. For example, the shark can chew through a great variation of things, because it has razor sharp teeth. I attempted to see what organ was connected to what and learn how squid differ from the human organ structure. I've learned that the structure of the organs inside a shark are different of that of a humans for many reasons. One being that a squid has an extremely oily liver that helps it keep buoyancy in the ocean, another would be it does not have any bones in its body unlike a human. (A person showing the anatomy of the Spiny dogfish shark.)

Background Information
The Spiny dogfish shark (Squalus acanthias)  is a grey or brownish color on top and pale grey or white on its bottom side with white spots on the top and sides of its body. Males can grow up to 3 feet while the females can grow up to 5 feet. The Spiny dogfish shark can be found at temperatures between 0 and 15 °C from 10 to 200 meters below. This shark can feed on multiple types of organisms. It can feed on krill, crabs,  jellyfish, cod, ect. Known predators of this shark are larger sharks like the Great white, and larger fish like some species of rockfish. Females each have 2 to 12 eggs per season. They bear live young, after a period of about 18 to 24 months, and typically produce 2 to 15 pups. they can live from 30 to 40 years.

Materials
1. Spiny dogfish shark
2. Dissecting probes
3. Scissors
4. Dissecting cloth sheet
5. Gloves
6. Forceps
7. Scalpel
Procedure
1. Receive the shark on the cloth.
2. Put on your gloves.
3. Use the probe to observe the roughness of its scales
4. use probe to follow and observe the lateral line.
5. Use the probe to observe the spiracle.
6. Use the probe...
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