On this page
How we collect shellfish data
Each year, we measure and record the size of shellfish caught by the fishing industry. For some species, we also collect information on age.
- at fishing ports
- in processing facilities
- at live holding facilities
- on board fishing vessels through our at-sea observer programme
Tracking what’s happening in the sea
We use information from fishing vessels to understand how much shellfish is being caught and how fishing activity is changing. We gather data from fishers’ logbooks and a network of around 75 vessels.
- catch levels
- fishing effort
- the size of shellfish caught
Surveying shellfish in their natural habitat
For native oysters, razor clams, scallops, and cockles, we carry out surveys to assess populations in the wild. We work on board inshore commercial fishing vessels or survey intertidal species on foot at low tide.
These surveys provide estimates of the shellfish present, known as biomass, and information about their size and age.
Why this matters
By collecting and analysing this data, we can:
- understand how shellfish populations are changing
- support sustainable fishing practices
- help protect marine ecosystems
- provide scientific advice to guide how shellfish populations are managed