Invasive SpeciesCommon periwinkle

Littorina littorea
FOUND by 41I
2014-10-14
Falmouth
ID Confirmed
Quality checked by LLP
Peer reviewed by
Field Notes
There are a lot of common periwinkles in the area, The area was rocky and had a lot of different species of seaweed, the area had a lot of green crabs, the periwinkles smelled salty, and were found all over the rocks and seaweed
A sketch of our study site.
Supporting Evidence
Photo of my evidence.
The opening on it was white around the specie. When the periwinkle came out of the shell there were black, horizontal bands on the tentacles.
Photo of my evidence.
The periwinkle shell was smooth, thick, and had a purplish brown shell. There were spireld indents throughout the shell
Photo of my evidence.
At the top of the shell there was a pointed apex. Most of the tips were worn down.
Species Observation: Species Looked For
Did you find it?: 
I think I found it
Scientific name:
Littorina littorea
Common name:
Common periwinkle
Is it alive?: 
Some dead & some alive
Count of individuals: 
50+
Coverage: 
Less than 1/4 covered
Reproduction: 
Eggs (animals)
How big is it?: 
2 - 5 cm
Is it male or female?: 
Female
Sampling method: 
Quadrat (user-placement)
Photo of our sampling method.
Place Studied
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Map this species
Latitude: 
N 43.731650 °
Longitude: 
W -70.205140 °
Observation Site Information
A photo of our study site.
Habitat: 
Coastal - Rocky intertidal
Trip Information
Name:
TownLanding 2014
Trip date: 
Tue, 2014-10-14 09:13
Town or city: 
Falmouth
Type of investigation: 
Species and Habitat Survey
Ecosystem: 
Coastal
Watershed: 
Presumpscot
Time of low tide: 
Tue, 2014-10-14 10:05
Habitat Observations
Species diversity: 
8 different species
Evidence of vectors: 
Boat ramp
Boats
Paved road
Walking trail
People
Water temperature: 
13.9°C
pH: 
7.4
Dissolved oxygen: 
9.3mg/L
Salinity: 
32.1ppt

Comments

Great sketch and evidence photos. Check out the best sketches section. You're sketch is there! http://vitalsignsme.org/best-vs

-The VS Team