Wednesday, August 6, 2008

Observations for Monday, August 4

Date of Observation: Monday, August 4, 2008
Location: Lovells Island, Quincy Bay (7.2 miles from Long Wharf); rocky coast, tide pool, and inland paths
Weather: Sunny, with a high temperature of approximately 80 degrees F

Tools: notebook and pencil, digital camera, ruler, magnifying glass, "National Audubon Society Field Guide to Seashore Creatures"

Observations: We arrived at Lovells Island by water taxi from Georges Island. The pier is located on the southern end of the island; from there we began an inland walk toward the northern end. Along our walk, we were challenged by Professor Berman to find a terrestrial snail. Few people succeeded in this initial attempt at snail collection. Although I did not personally find a snail on this first walk, I was present when a classmate nearby found one. If you look closely at the photo below, you can see two terrestrial snails near the middle of the shot; one with a yellow shell and one with a brown shell. I did not have direct contact with these particular two specimens, but I did note that they were both found sitting on top of leaves rather than on the underside.
The path we were on brought us to the northern side of the island. We stopped very briefly on the northwest side of the island, where the coastline was rocky. Upon overturning several medium-sized rocks (varying from an estimated 15-25 cm in length), we discovered a number of fast-moving crabs. I was able to capture a small hermit living in a shell 1.5-2 cm in length. This was the best photo I was able to take, as we were quickly moving on to our next location.
A picture of one of the periwinkles from the tide pool emerging from its shell. By my records, this specimen's shell was approximately 1.7 cm long by 1.1 cm wide. The other specimen I found was slightly smaller, with a shell approximately 1.5 cm long by 1.0 cm wide.
Terrestrial snail found on the underside of a leaf during our snail search.
One of the Lovells snails that made its way home with me. I believe this snail is a Grove, or brown-lipped, snail due to the brown ring that surrounds the lip, or opening, of its shell. However, one cannot be absolutely certain without genetic testing, as some brown-lipped snails actually have a white lip.

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