Demersal fish

General Information

North Sea

Baltic Sea

Clyde Marine Region

Adriatic Sea

Eastern Mediterranean Sea

Demersal fish

Layer Info
Category	Ecology
Sub-category	Fish

Description

Small demersal fish

Example species: Grey gurnard

Habitat: Demersal
Main role: Predator
Trophic level: 4,5

Diet: Juveniles feed on a variety of crustaceans. The diet of older specimens consists mainly of juvenile fish.

Threats: Grey gurnards are of lesser commercial importance, and are mostly caught as bycatch for other flatfish.

Large demersal fish

Example species: Thornback ray

Habitat: Demersal
Main role: Predator
Trophic level: 3,8

Diet: This ray feeds on fish and invertebrates.

Threats: Of commercial interest and near threatened according to IUCN red list. The thornback ray is often caught as bycatch by trawl and gillnets.

MSP Challenge

The small demersal fish group includes the following species: eelpout, shorthorn sculpin, Vahls’s eelpout, longspined bullhead, hooknose, common seasnail, greater weever, lesser weaver, snake blenny, striped red mullet, solenette, thickback sole, mediterranean scaldfish, argentine, dragonet, piper gurnard, red gurnard and grey gurnard.

The large demersal fish group includes the following species: rabbit fish, John Dory, sea trout, Norway red fish, Bluemouth, roundnose grenadier, starry ray, spotted ray , Common skate, cuckoo ray and thornback ray.

Demersal fish is a month-by-month, computer generated data layer following calculations made by the ecosystem simulation (EwE).

Different pressures generate by human activities (noise, bottom disturbance, surface disturbance, artificial substrate) have different, complex effects on marine species in terms of movement, survival and procreation.

Demersal fish are caught by all fishing fleets, but mostly by bottom trawl.

Types

• Very Low Density
• Low Density
• Medium Density
• High Density
• Very High Density

Metadata

Data Source

Enter data source for North Sea here.

Original Title

Enter name of the layer at the North Sea source.

Description

Enter the description of the North Sea dataset here.

Creation Date

yyyy-mm-dd North Sea

Methodology

Enter here how the layer was prepared to be integrated into the MSP Challenge North Sea Edition.

Types

Baltic Sea types here

Metadata

Data Source

Enter data source for Baltic Sea here.

Original Title

Enter name of the layer at the Baltic Sea source.

Description

Enter the description of the Baltic Sea dataset here.

Creation Date

yyyy-mm-dd Baltic Sea

Methodology

Enter here how the layer was prepared to be integrated into the MSP Challenge Baltic Sea Edition.

Types

Clyde Marine Region types here

Metadata

Data Source

Enter data source for Clyde Marine Region here.

Original Title

Enter name of the layer at the Clyde Marine Region source.

Description

Enter the description of the Clyde Marine Region dataset here.

Creation Date

yyyy-mm-dd Clyde Marine Region

Methodology

Enter here how the layer was prepared to be integrated into the MSP Challenge Clyde Marine Region Edition.

Types

Adriatic Sea types here

Metadata

Data Source

Enter data source for Adriatic Sea here.

Original Title

Enter name of the layer at the Adriatic Sea source.

Description

Enter the description of the Adriatic Sea dataset here.

Creation Date

yyyy-mm-dd Adriatic Sea

Methodology

Enter here how the layer was prepared to be integrated into the MSP Challenge Adriatic Sea Edition.

Not applicable. This layer is not available in the MSP Challenge Eastern Mediterranean Sea Edition.