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Unformatted text preview: On January 26, 2008 I went to Huntington Beach State Park to observe the distribution pattern of the periwinkle snail, Littoraria irrorata , in the marsh. The snails were fairly abundant in the high marsh and there were plenty to observe. The tide was low while I was there and most of the snails were found either on the sediment surface or on the stalks of the cord grass very close to the ground. Since these snails eat detritus and algae they most likely are found in this area while foraging for food. An alternate explanation for this location could be to avoid avian predators. Being located at or near the ground on the stems of plants would make them harder to see and access. Climbing has also been observed in the periwinkle snail as a way to avoid the rising tidal water. Many studies have been done to assess this climbing activity as a method of rising tidal water....
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- Spring '08