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==Description==
==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 [[Industrial and Pelagic Trawl Catch|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 [https://community.mspchallenge.info/wiki/Materials_for_facilitators MSP Challenge community website].
Bottom trawling is trawling (towing a trawl, which is a fishing net) along the sea floor. It is also referred to as "dragging". Bottom trawling can be contrasted with midwater trawling (also known as [[Industrial and Pelagic Trawl Catch|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).


==MSP Challenge==
==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 [[Protection Against Bottom Trawl|protected against bottom trawl]].
Bottom Trawl Catch is a month-by-month, computer-generated data layer following this fleet's fishing efforts calculated by the ecosystem simulation. This fleet doesn't fish in areas that are [[Protection Against Bottom Trawl|protected against bottom trawl]].
 
A plan can also include a change in the fishing efforts for this fleet per [[EEZ|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)


A plan can also include a change in the fishing efforts for this fleet per [[EEZ|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).


The Bottom Trawl fleet mostly catches the following species:
Return to [[Categories and Layers#tab=Fishing|fishing]].
* [[Flatfish|Flatfish]]
* Commercial gadoids
=North Sea=
* [[Demersal fish|Demersal fish]]
In the North Sea the Bottom Trawl fleet mostly catches the following species:
* [[Flatfish]]
* [[Commercial gadoids]]
* [[Demersal fish]]
* [[Benthic invertebrates|Large benthic invertebrates]]
* [[Benthic invertebrates|Large benthic invertebrates]]
* [[Cod|Cod]]
* [[Cod]]
* Demersal predators
* Demersal predators
* Many other species in (very) small amounts
* Many other species in (very) small amounts
Return to [[Categories and Layers#tab=Fishing|fishing]].
=North Sea=
==Types==
==Types==
* Very Low Density
* Very Low Density
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===Methodology===
===Methodology===
Not applicable.  
Not applicable.  
Return to [[Categories_and_Layers#tab=Fishing|fishing]].


=Baltic Sea=
=Baltic Sea=
Not applicable.


==Types==
This layer is not available in the Baltic Sea Edition.
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===
Return to [[Categories_and_Layers#tab=Fishing|fishing]].
Enter here how the layer was prepared to be integrated into the MSP Challenge Baltic Sea Edition.


=Clyde Marine Region=
=Clyde Marine Region=
Not applicable.


==Types==
This layer is not available in the Clyde Marine Region Edition.
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===
Return to [[Categories_and_Layers#tab=Fishing|fishing]].
Enter here how the layer was prepared to be integrated into the MSP Challenge Clyde Marine Region Edition.


=Adriatic Sea=
=Adriatic Sea=
Not applicable.


==Types==
This layer is not available in the Adriatic Sea Edition.
Adriatic Sea types here
 
==Metadata==
===Data Source===
Enter data source for Adriatic Sea here.


===Original Title===
Return to [[Categories_and_Layers#tab=Fishing|fishing]].
Enter name of the layer at the Adriatic Sea source.


===Description===
= Eastern Mediterranean Sea =
Enter the description of the Adriatic Sea dataset here.
Not applicable.
 
===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.


<headertabs/>
This layer is not present in the Eastern Mediterranean Sea.<headertabs/>

Latest revision as of 13:22, 3 April 2023

Bottom Trawl Catch
Layer Bottom Trawl Catch.png
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:

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.

Not applicable.

This layer is not present in the Eastern Mediterranean Sea.

Retrieved from "https://knowledge.mspchallenge.info/index.php?title=Bottom_Trawl_Catch&oldid=5334"
This page was last edited on 3 April 2023, at 13:22. Content is available under GPLv3 unless otherwise noted.