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Lobster

Page history last edited by Adam G 8 years, 8 months ago

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Lobster

 

By Adam Goldfarb

Description

 

Lobsters are crustaceans. They are invertebrates with rock-hard shells that scurry along the mucky sands of the reef. They have large, strong claws which pose as a threat to many sea creatures. One claw is called the Crusher Claw, which is used for offensive attacks, and the Pincher Claw is used for defending itself. Lobsters have eight slim legs that are capable of holding it's body up off the ground. They have antennae near their faces, which are mainly used as sensors and can smell their prey. They also have a hard exoskeleton, which protect the lobster's insides. Within growth, lobsters go through a process call Ecdysis (or moulting). This is the process of the creation of a new shell. It is what happens when a lobster grows out of its shell, and needs a new one for protection.  They can be blue, light yellow, greenish-brown, grey, dusty orange, some calico, and some with spots. They only turn red when they hit hot water, since the water cuts a red substance in its shell called astaxanthin. 

 

 

Habitat

 

Lobsters are found in all oceans. They live in and about sea weeds or in rocky areas that provide food and protection from predators. They mainly live along the Continental Shelf, which can reach a depth of approximatively 460 feet. Adolescent lobsters tend to dominate costal habitats and shores, whereas larger adult lobsters live in deeper waters, though they seasonally return to the shallows. 

 

Predator Adaptions

 

The claws of a lobster are meant to crush its prey rather than slice them in half. They are capable of breaking a human finger. They need their claws to crush the exoskeletons of the invertebrates they eat. They eat sea creatures such as crabs, clams, Purple Sea Urchins, Sea Cucumberand other fish. They sometimes resort to cannibalism when necessary as well.

 

Prey Adaptions

 

While along the bottom of the sandy, mucky shores of the Continental Shelf, lobsters are threatened by a number of predators (such as the flounder, sculpins, wolffish, eels, rock gunnels, crabs and seals). Their greatest threat are human beings. Lobsters are known as delicious delicacies throughout the entire world. Though they can't do much against us, they have prey adaptions which protect themselves from many other predators. They have rock-hard exoskeletons to protect them. They are vulnerable during their moulting process, so they tend to live under rocks and in secluded areas. Their exoskeleton's colour and texture can be used as camouflage in some cases, as well.

 

Symbiotic Interactions

 

The microscopic Symbion Pandora has a commensal symbiotic relationship with a lobster. The Symbion Pandora attaches itself to the mouthparts of lobsters, and makes itself at home. It is able to eat the bits of leftover food that the lobsters have eaten and it is safe from predators. The lobster, however, remains unaffected. This symbiotic relationship closely resembles the relationship between sharks and Remoras.

 

Species Comparison: Horseshoe Crab

 

Similarities

 

Both the horseshoe crab and the lobster are arthropods, which means they both have solid exoskeletons, a segmented body and joined limbs. They both come from the crustacean family, and they both have strong claws. Both these creatures go through a moulting process as well.

 

Differences

 

These two sea creatures have their differences as well. Their anatomy is different in general; a horseshoe crab has a protective, horseshoe-like shell on its back, a long tail and it doesn't have large claws like a Lobster. Lobsters only have two eyes, yet horseshoe crabs have nine. 

 

      

 

RESOURCES

                                                                                        

American Lobster - Frequently asked Questions

Last Updated: Date Unknown

St. Lawrence Global Observatory

May 26, 2013

http://slgo.ca/en/lobster/context/faq.html

 

All About Lobsters 

Last Updated: February 24, 2012                                                                                

Gulf of Maine Research Institute

May 25, 2013

http://octopus.gma.org/lobsters/allaboutlobsters/society.html

 

 

Lobster FAQ

Last Updated: Sometime in 2007

Fact Monster (Pearson Education, Inc.)

May 25, 2013

http://www.factmonster.com/ipka/A0854908.html

 

Creature Cast - Life of a Lobster Mouth

Last Updated: May 9, 2011

Creature Cast, a collaborative blog by the Dunn Lab and friends

May 26, 2013

http://creaturecast.org/archives/category/symbiosis

 

What Eats Lobsters?

Last Updated: April 1, 2010

Published by the ADMIN of WHAT EATS?

May 26, 2013

http://www.whateats.com/what-eats-a-lobster

 

Blue Lobster,

Photograph Encyclopedia Brittanica

Image Quest. Web. 27 May, 2013

 

Common Lobster, Photograph Encyclopedia Brittanica

Image Quest. Web. 27 May, 2013

http://quest.eb.com/images/106_933248

 

Eastern Rock Lobster

Last Updated: January 5, 2010

Australian Museum

May 27, 2013

http://australianmuseum.net.au/Eastern-Rock-Lobster 

 

American Lobster, Photograph Encyclopedia Brittanica

Image Quest. Web. 28 May, 2013

http://quest.eb.com/images/139_1954768 

 

Lobster

Last Updated: May 28, 2013

Wikipedia - The Free Encyclopedia

May 29, 2013

http://en.wikipedia.org/wiki/Lobster

 

Horseshoe Crab

Last Updated: May 28, 2013

Wikipedia - The Free Encyclopedia

May 29, 2013

http://en.wikipedia.org/wiki/Horseshoe_crab

 

 

 

 

Comments (4)

Charlie Cross said

at 9:27 am on May 15, 2013

hi

Adam G said

at 9:28 am on May 15, 2013

hi

Charlie Cross said

at 9:29 am on May 15, 2013

whaddup

William brinckman-smith said

at 4:17 pm on May 27, 2013

You are good

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