Invasive SpeciesLittorina saxatilis was NOT FOUND

on 2009-07-17 in Steuben
Submitted by mdenniston on Fri, 2009-08-07 at 03:58 pm
ID was Confirmed by a Vital Signs Expert Reviewer
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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 looked everywhere for the rough periwinkle. We thought we might have found it when we found some small periwinkles with small spiral ridges around the shell, having a short spire with a pointed tip, but we decided they were young common periwinkles.

Photo of my evidence.

When we turned these small periwinkles over, we were fairly sure we had not found the rough periwinkle because the color of the shell around the opening was white and much lighter than the rest of the shell. This made us believe we had found young common periwinkles. We believe that the color of the shell around the opening of a rough periwinkle is darker than the rest of the shell

Species Observation:
Species Looked For
Common name:
Rough periwinkle
Scientific name:
Littorina saxatilis
Was found?
I think I did not find it
Count of individuals?
Coverage?
Dead or alive?
Size:
Sex:
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

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