Emerita analoga

Emerita analoga - Emerita analoga Josh Ahn Title This study...

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Emerita analoga Josh Ahn Title This study was done on the Pacific sand crab, Emerita analoga , to determine the size distribution, sex ratio, and differences between two populations at Campus Point in Goleta, CA and at Pismo Beach, CA. Introduction Emerita analoga are oval-shaped crustaceans found on the Pacific coast of North America. These animals live under the sand in the intertidal zone and have an average lifespan of two to three years. They are filter feeders that use their antennae to filter plankton and organic debris from the water. Females of this species carry bright orange eggs under their telson during the summer months and grow larger and faster than males. The purpose of this study was to determine the size distribution of this species as well as differences in size between males and females and between populations in two different locations. Materials and Methods This experiment was begun by taking samples of sand crabs at Campus Point in Goleta, CA. These samples were then sorted by size using a system of boxes with different diameters of holes, which the crabs were put into and allowed to fall to their respective boxes. These were then differentiated by sex and whether or not they possessed eggs. Some of the samples were not sexed due to being too small. The size
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class at which sexing stopped was at 9.42 mm in length.
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Emerita analoga - Emerita analoga Josh Ahn Title This study...

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