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Snail Shell Thickness Lab Report

327 Words2 Pages

Methods Initially, four crabs were placed in the West side of the island composed of snails with thicker shells to represent the crab infested environment. The East side of the island was composed of snails with thinner shells and had no predators, thus representing the crab free environment. The simulation ran for over 1000 steps and then was stopped. The graphs for the distributions of snail shell thickness were saved before and after the simulation. To test if variation is at least partly heritable, approximately 12 snails were placed in corresponding tanks based on their shell thickness. Tank 1 was composed of snails with shell thickness between size 2 and 4, tank 2 corresponded to sizes 4 to 8, tank 3 corresponded to sizes 6 to 10, and

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