Bottom Trawl Catch

General Information

North Sea

Baltic Sea

Clyde Marine Region

Adriatic Sea

Eastern Mediterranean Sea

Bottom Trawl Catch

Layer Info
Category	Activities
Sub-category	Fishing

Description

Bottom trawling consists in towing a fishing net along the sea floor to catch fish or other marine species. Bottom trawling can be contrasted with midwater trawling (also known as pelagic trawling), where a net is towed higher in the water column. Trawling is done by a trawler, which can be a small open boat with only 30 hp (22 kW) or a large factory trawler with 10,000 hp (7,500 kW). Bottom trawling can be carried out by one trawler or by two trawlers fishing cooperatively (pair trawling).

Source of image: Fishing fleets poster created for NorthSEE project, accessible at MSP Challenge community website.

MSP Challenge

Bottom Trawl Catch is a month-by-month, computer-generated data layer following this fleet's fishing catch calculated by the ecosystem simulation. This fleet doesn't fish in areas that are protected against bottom trawl.

A plan can also include a change in the fishing efforts for this fleet per EEZ. Activate the Fishing controls by ticking the appropriate checkbox under section 2b in the Plan Wizard. Subsequently, change the Fishing effort sliders under the Fishing tab of the Plan Details (maximize the Plans Monitor and select your plan)

Return to fishing.

In the North Sea the Bottom Trawl fleet mostly catches the following species:

• Flatfish
• Commercial gadoids
• Demersal fish
• Large benthic invertebrates
• Cod
• Demersal predators
• Many other species in (very) small amounts

Types

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

Metadata

Data Source

The bottom trawling data layer comes from the EwE simplified North Sea model based on Mackinson and Daskalov 2007 and ICES WGSAM 2015 Keyrun. Ecospace based on Romagnoni et al 2015. The model was adjusted for use in the MSP Challenge by Giovanni Romagnoni.

Original Title

Bottom Trawl.

Description

The bottom trawling included demersal & benthic trawl, beam trawl, shrimp trawl and nephrops trawl.

Creation Date

Not applicable.

Methodology

Not applicable.

Return to fishing.

Not applicable.

This layer is not available in the Baltic Sea Edition.

Return to fishing.

Not applicable.

This layer is not available in the Clyde Marine Region Edition.

Return to fishing.

Not applicable.

This layer is not available in the Adriatic Sea Edition.

Return to fishing.

Types

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

Metadata

Data Source

Bottom Trawl Catch is a month-by-month, computer generated data layer following calculations made by the ecosystem simulation (EwE). The simplified EwE Eastern Mediterranean model was adjusted for use in the MSP Challenge by Eyal Ofir.

For more information on how Ecopath-with-Ecosim (EwE) works, please visit our Wiki page or visit the official EwE website at https://ecopath.org.