Jeremy Present student # Homarus americanus Homarus americanus Common name Common name American lobster American lobster Kingdom : Anamilia Phylum: Arthropoda Class: Crustacea Order: Decapoda Family: Nephropidea Genus: Homarus Species: americanus

Biology Measure as long as 107 cm. Measure as long as 107 cm. Weight about 20 kg. Weight about 20 kg. Body has 21 segments Body has 21 segments Breath through gills situated on thorax. Breath through gills situated on thorax. Has compound eyes, five pair of joint legs Has compound eyes, five pair of joint legs Four thin legs use for walking the fifth pair contains large claws. Four thin legs use for walking the fifth pair contains large claws.

Habitat and Ecology Labrador to North Carolina, Northwest Atlantic. Labrador to North Carolina, Northwest Atlantic. Niche rocky areas Niche rocky areas Main diet includes crabs,mussels, ect. Main diet includes crabs,mussels, ect. Females produced eggs once every two years. Females produced eggs once every two years. Average age 15 years or longer. Average age 15 years or longer. Predators – cob, sculpins, eels, MEN ! Predators – cob, sculpins, eels, MEN !

Age determination Lipofuscin accumulation in the brain Lipofuscin accumulation in the brain is quantified by influrescence microscope is quantified by influrescence microscope Image analysis Image analysis Size and number of lipofuscin granules Size and number of lipofuscin granules Carapace length is age related Carapace length is age related Hence, lipofuscin technique differentiate cohorts Hence, lipofuscin technique differentiate cohorts

Reference The American Lobster (Google).Overview of Homarus americanus: The American lobster(30 April 2008).Available: The American Lobster (Google).Overview of Homarus americanus: The American lobster(30 April 2008).Available: Wahle R A,et al.1996.LIpofuscin as a indicator of age in crustaceans :analysis of the pigments in the American lobster.138:p Wahle R A,et al.1996.LIpofuscin as a indicator of age in crustaceans :analysis of the pigments in the American lobster.138:p World Book Inc.(2005).The world book Enclyclodedia.2005 edition.Chicago.Libary of Congress cataloging-in-Publication Data World Book Inc.(2005).The world book Enclyclodedia.2005 edition.Chicago.Libary of Congress cataloging-in-Publication Data