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Common periwinkle

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General

Shellfish

The term shellfish covers several species of bivalve molluscs, sea snails and other shelled animals. Examples include scallops, mussels, razor clams, oysters, cockles and whelks. Shellfish live partly in or on the seabed and occur worldwide. They filter the water and extract the nutrients they need. Eggs and reproductive cells are released into the water and fertilisation takes place externally. Most species are hermaphroditic and can produce both eggs and sperm during their lives. Shellfish occur in many different shapes and sizes. This diversity is still the subject of scientific discussion.

Common periwinkle

The common periwinkle is very common along the Dutch shores. They are often a few centimetres big and have a strong, round shell. Common periwinkles are mainly found along the high tide waterline, where they can be handpicked.

Common periwinkle

Littorina littorea

Origin

Atlantic Ocean, northeast (FAO 27)

Farming- / Catch method

Hand collection

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Minder tonen Toon beoordeling

Fish stocks and fishing pressure

Ecosystem effects

Fishery management

Final assessment

Explanation assessment

Periwinkles are fast-growing species that are little affected by fishing pressureFishing pressure:
Fishing pressure is a result of the fishing effort/amount of fishing on a stock, which determines the fishing mortality. Fishing mortality is the share of the fish stock that dies annually as a result of fishing.. Little information is available on the effects of fishing on this species, but periwinkles are not expected to be very vulnerable.

Periwinkles are primarily hand collected. Harvesting moluscs does not involve bycatchBycatch:
Species caught next to species targeted for fishery. By-catches can consist of non-commercial species and species that are too small, and can be kept (this part is sometimes called by-product) or thrown back into the sea (discards). and allows for very selectiveSelective fishing methods:
Selective fishing methods capture many target species, and little or no unwanted fish species and animals. fishing. This method does not cause negative ecosystem and habitat impacts. The ecosystem effects of periwinkle removal have not been studied, but are expected to be low.

There is a management plan for this species, but due to the lack of specific management for this local fishery, a lack of data and possible risks of illegalIllegal fishing:
Fisheries that do not comply with the established agreements, such as not giving up catches to national authorities, operating without permission or in prohibited/closed zones. Illegal fishing is covered by IUU fishing (Illegal Unreported Unregulated). fishing. ManagementManagement:
The regulations surrounding fisheries and aquaculture that ensure that production is carried out within legal frameworks and that sustainability can be assured. of this species is partially effective.

ASC label

Fish with the ASC label is farmed in a sustainable manner.

MSC label

Fish with the MSC label is caught sustainably.

Good fish

This fish is not being overfished or is being responsibly farmed, with minimal impact on the environment.

Second choice

This fish is a second choice. There are still some improvements to be made in this fishery or fish farm.

Avoid

Do not buy this fish. It's being overfished or the way it's farmed or caught has a negative impact on the environment.

Welfare

There is fish available of this species that is farmed or caught using high welfare standards.

GlobalG.A.P.

GlobalG.A.P. certified farms are doing a step in the right direction in terms of sustainability. A few species with this label are getting a better score on the VISwijzer.

Organic

Organic standards are the strictest when it comes to fish feed. They also require certain measures for animal well-being.