Periwinkles at Blacks Harbour

Scroll down to content

Winkles on wood on the seashore

The Common Periwinkle, Littorina littorea Linnaeus, is very abundant on the shore at Blacks Harbour where they graze on every hard surface. They crawl over bedrock, boulders, and beach stones –  but have a particular liking for the weathered wooden stumps of old pilings that litter the beach. The winkles feed on the microscopic algae by scraping it from objects with a special kind of tongue, called a radula, which has rows of renewable teeth.

It is believed that this gastropod mollusc was accidentally introduced from western Europe in the late 19th century. It is the same species that occurs so frequently on the seashores of the UK and has been discussed in earlier posts.

COPYRIGHT JESSICA WINDER 2013

All Rights Reserved

2 Replies to “Periwinkles at Blacks Harbour”

  1. The wood grains were incredible and, yes, the sun came out for a while. We did seem to have a lot of overcast skies and rainy days when we were in Canada … but it didn’t spoil our enjoyment…just seems to have ruined the camera.

    Like

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.

%d bloggers like this: