Tuesday, March 5, 2013

Lobster Biology

What is the average lifespan for a wild lobster? 
- Lobsters are crustaceans that are known to be aggressive at times but they also have very good survival instincts. Due to the lobsters survival instincts and dominance on the ocean floor, lobsters live for an average of about 50 years. Some lobsters can live up to 80 years but due to the dangers of the ocean, most do not make it that long.
http://animals.nationalgeographic.com/animals/invertebrates/lobster/
https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjByR5Gz40EcmH48CeHuNYP3n7rScrefHW8zyTvg2S33RgZb0QPBZ6l896D5DB0GcG14VEGAusd1OvBkh4jxMziy1alNY2ThDjiQiOQPSWjMQS7hucpRWQxdiJWbcYWr1EfZQR5d0NG5Y8/s1600/l+red+lobsters+old+live.jpg

How do lobsters reproduce?
- Females can only reproduce directly after they shed their shell, or molt. Instead of having the male lobsters decide their mate, the female is the one that approaches the male and releases pheromones in the male lobsters direction. The female will stay in the male lobsters den until her shell has grown back and has hardened and by that time they have mated. The female lobsters will carry the eggs on the underside of their tale until they are ready to hatch.
http://www.gan.ca/animals/lobsters.en.html
http://i.mol.im/i/pix/2010/03_01/PregLobsterAP_378x650.jpg

What makes a lobster such a unique organism? 
- Lobsters have very poor vision, they can only detect movement but not the shape of the figure. Instead of using their poor vision to hunt and escape predators,  they use their receptors to detect other organisms in the ocean. The lobster's long antennae are used to taste the particles in the water. A lobster also has tiny hair like bristles on its legs that can also taste what is on the sea floor. The lobster more than compensates for its lack of sight with its smell, taste, and touch sensory.
http://www.gma.org/lobsters/allaboutlobsters/parts.html
http://upload.wikimedia.org/wikipedia/commons/thumb/3/3e/California_spiny_lobster.JPG/800px-California_spiny_lobster.JPG

How do lobsters defend themselves in the ocean? 
- The defense techniques that the clawed lobster and the rock lobster have similarities and differences. Due to the rock lobsters lack of claws, the rock lobster usually attempts to hide underneath rocks and crevices. The clawed lobster is usually bigger than the rock lobster and uses its claws to fight off predators, but the clawed lobster still uses the cover of a rock on most occasions. Both species of lobsters have a hard exoskeleton to protect their soft insides.
http://link.springer.com/article/10.1007%2Fs00227-005-0191-2?LI=true
http://www.ilovebluesea.com/ilbs_wp_blog/wp-content/uploads/2011/06/lobster-claw.jpg

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