Native SpeciesLittorina obtusata was FOUND

on 2009-07-17 in Steuben
Submitted by mdenniston on Fri, 2009-08-07 at 03:58 pm
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Field Notes
Field Notes Sketch

We are happy because we get to do our research at one of our favorite summer places with our family team. We love exploring among the rocks and we love that our dog gets to be a scientist right along with us! The waves are crashing on the foggy shore and cooked lobster shells lie wedged among the rocks. We hear seagulls calling above the crashing waves as a foghorn blows in the distance. The barnacles make gurgling noises as we walk over them. The air has a moist and salty smell. Walking on the rocks and seaweed was tricky and slippery! We were surprised and a little disappointed that we could only find 2 live crabs, both of them green crabs. We believe there are many rock crabs, Jonah crabs and green crabs here because their shells are common on the rocks, but live ones are very hard to find. Periwinkles and dog whelks are everywhere among the barnacles and seaweed.

Supporting evidence
Photo of my evidence.

We found many smooth periwinkles ranging in color from gray to red to yellow. Their shells and whorls were very smooth with a very flat spire that did not come to a sharp point.

Photo of my evidence.

When we turned the smooth periwinkles over, we noticed that the opening of the shell was tear-shaped and the color of the shell around the opening was white or very light colored compared to the rest of the shell.

Photo of my evidence.

When we compared the smooth periwinkle (on left) to the common periwinkle (on right), it was easy to see how much flatter the spire of the smooth periwinkle was.

Species Observation:
Species Looked For
Common name:
Smooth periwinkle
Scientific name:
Littorina obtusata
Was found?
I think I found it
Count of individuals?
50+
Coverage?
Less than 1/4 covered
Dead or alive?
Some dead & some alive
Size:
0 - 2 cm
Sex:
Can't tell
Evidence of reproduction:
Sampling method:
  • Just looking around
Place studied
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Latitude:
44.428280 ° N
Longitude:
-67.911890 ° W
Observation Site Information
A photo of our study site.
Name:
PetitTeam's visit to Petit Manan Point
Habitat:
Coastal - Rocky intertidal
Trip Information
Trip name:
Petit Manan Point
Trip date:
2009-07-17
Nearest town:
Steuben
Type of investigation:
Species and Habitat Survey
Ecosystem:
Coastal
Watershed:
Other
Nearest waterbody:
Dyer Bay
Low tide AM:
12:14 am
Low tide PM:
12:23 pm
High tide AM:
06:19 am
High tide PM:
06:40 pm
Photo of our sampling method.
Habitat Observations
Diversity:
30 different species
Water temperature:
14.7 ° C
pH:
8.0
Dissolved oxygen:
7.0 mg/L
Salinity:
34.0 ppt
Vectors:
  • Boats

  • Walking trail

  • People

  • Recent disturbance

Comments

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i love the pictures

i love the picutures and the nice information you gave the readers!

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