Seine Catch

General Information

North Sea

Baltic Sea

Clyde Marine Region

Adriatic Sea

Eastern Mediterranean Sea

Seine Catch

Layer Info
Category	Ecology
Sub-category	Fishing

Description

The seine catch data layer shows a heatmap of the quantity of fish caught by the seine fleet.

So far in the MSP Challenge we have two different seine fleets: purse seine and beach seine.

"A purse seine is a large net used to surround a shoal of pelagic fish. Once shot, the bottom of the net is drawn together by hauling in a long wire called the ‘purse line’ to form a huge cup shape of netting just below the surface of the water with the targeting fish inside. The net is gradually hauled onboard the vessel and the catch is taken onboard the vessel" (seafish, n.d.).

"A beach seine is a seine net operated from the shore. The gear is composed of a bunt (bag or lose netting) and long wings often lengthened with long ropes for towing the seine to the beach. The headrope with floats is on the surface, the footrope is in permanent contact with the bottom and the seine is therefore a barrier which prevent the fish from escaping from the area enclosed by the net. Two basic types of gear can be distinguished: seine nets without a bag (Fig. 1) and seine nets with a bag (Fig. 2). The first one do have, however, a central part with smaller meshes and more slack, which retains the fish caught. In the second one the fish are retained in the bag. It is not necessary for the bag to be exactly in the centre and in this case the wings are not of equal length." (FAO. 2024).

Sources:

Seafish. (n.d.). www.seafish.org accessed on 2022-04-05.

FAO. 2024. Fishing Gear types. Beach seines. Technology Fact Sheets. In: Fisheries and Aquaculture. [Cited Wednesday, November 27th 2024].

https://www.fao.org/fishery/en/geartype/202/en

Image: From seafish. (n.d.). www.seafish.org accessed on 2022-04-05.

MSP Challenge

Seine 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 seine fleets.

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.

Not applicable.

This layer is not available in the North Sea Edition.

Not applicable.

This layer is not available in the Baltic Sea Edition.

In the Clyde Marine Region the Seine fleet catches includes also the catches from the pelagic trawl fleet and affects mostly the following species:

• Herring
• Whiting
• Sharks
• Cod
• Other demersal species
• Mackerel

Types

• Extremely Low
• Low
• Medium
• High
• Extra High

Metadata

Data Source

The seine catch data layer comes from the EwE model developed for the Clyde Marine Region Editio of the MSP Chalenge by Jacob W. Bentley (Scottish Association for Marine Science), Jeroen Steenbeek (International Ecopath Initiative), Natalia Serpetti (Scottish Association for Marine Science), and Sheila J.J. Heymans (European Marine Board).

Original Title

Seine catch.

Description

Catch by all seine fleets aggregated (includes pelagic trawl and seine fleets)

Creation Date

Not applicable.

Methodology

Not applicable.

Not applicable.

This layer is not available in the Adriatic Sea Edition.

In the Eastern Mediterranean Sea there are two types of Seine Fleets; Purse Seiners and Beach Seiners, both layers have equal types.

Types

• Extremely Low
• Low
• Medium
• High
• Extra High

Metadata

Data Source

Purse Seine Catch and Beach Seine 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.