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Common Dab

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Green
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General

Flatfish

Flatfish belong to the order Pleuronectoformes. There are more than 500 species of flatfish. Flatfish live on and partly in the seabed, only the halibut swims higher up in the water column. Flatfish have an oblong, flat shape and their eyes on one side. The upper-side, the eye-side, of the flatfish has a camouflage colour and the underside is white. It may seem like flatfish swim on their belly, however, in fact, they are laying on their side. Flatfish larvae have a regular fish shape, with eyes on each side and a vertical swimming mode. After 6 weeks, one of the eyes migrates upwards, over the head to the other side. From now own, the flatfish swims with their eyes up and their blind side facing the seabed.

The best known flatfish species in the Netherlands are sole and plaice. Other flatfish species that occur in the North Sea are the common dab, halibut, turbot, brill, European flounder and lemon sole. Flatfish are caught with beam trawls, pulse trawls or demersal otter trawls.

 

Common Dab

Common dab is only found in the northeast Atlantic Sea. Dab is part of the large group of flatfish with the eyes on the right-hand side. This side is pale brown to greyish brown of colour, with darker blotches and speckles. The left-hand side is white. Common dab reaches up tot 60 cm of length and 12 years of age. Dab is a common bycatch species in the targeted fishery for plaice and sole.

Common Dab

Limanda limanda
Origin

Atlantic Ocean, northeast (FAO 27)

Farming- / Catch method

Anchored gillnets

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Fish stocks and fishing pressure
Ecosystem effects
Fishery management
Final assessment
Explanation assessment

The stockStock:
The fish of a particular species reproducing in the same area in the same period. 
of common dab is currently at a sustainableSustainable:
Meeting the needs of current generations without compromising opportunities for future generations. This also allows future generations to benefit from the same needs.
level, as is the fishing pressureFishing pressure:
Fishing pressure is a result of the fishing effort/amount of fishing on a stock, which determines the fishing mortality. Fishing mortality is the share of the fish stock that dies annually as a result of fishing.
. Dab is often caught as bycatchBycatch:
Species caught next to species targeted for fishery. By-catches can consist of non-commercial species and species that are too small, and can be kept (this part is sometimes called by-product) or thrown back into the sea (discards). 
in demersal fisheries.

The impact of this fishery with anchoredanchored gillnets:
A fishing technique whereby passing fish become tangled up in a net with their gills (also known as a gillnet), which is vertically standing on the bottom.
gillnets is still largely unknown. There is little information available on the catch and what proportion of it consists of endangered and protectedProtected species:
Many marine species are protected from deliberate or intentional disturbance, capture, injury and killing, and in some cases possession or sale. Species are often protected if they play an important role in the ecosystem or are sensitive to fishing. These marine species are protected regardless of whether they are inside or outside marine protected areas.
species. The amount of information available is also too little to assess the impact of this fishery on the ecosystem.

Dab is not managed with specific management measuresManagement measures:
For fisheries, management measures can affect the amount of fish that can be caught, the type of gear that can be used and where fishing is and is not allowed.
. Catch surveys provide reliable information to monitor the population of this species. The managementManagement:
The regulations surrounding fisheries and aquaculture that ensure that production is carried out within legal frameworks and that sustainability can be assured.
of this species is partially effective.

Common Dab

Limanda limanda
Origin

Atlantic Ocean, northeast (FAO 27)

Farming- / Catch method

Beam trawl

  • Jan
  • Feb
  • Mar
  • Apr
  • May
  • Jun
  • Jul
  • Aug
  • Sep
  • Oct
  • Nov
  • Dec
Fish stocks and fishing pressure
Ecosystem effects
Fishery management
Final assessment
Explanation assessment

The stockStock:
The fish of a particular species reproducing in the same area in the same period. 
of common dab is currently at a sustainableSustainable:
Meeting the needs of current generations without compromising opportunities for future generations. This also allows future generations to benefit from the same needs.
level, as is the fishing pressureFishing pressure:
Fishing pressure is a result of the fishing effort/amount of fishing on a stock, which determines the fishing mortality. Fishing mortality is the share of the fish stock that dies annually as a result of fishing.
. Dab is often caught as bycatch in demersal fisheries.

Fishing with the beamBeam trawls:
A technique in which a pit net at the top is kept open by a horizontal tube (the tree). Ticklerchains are tossed through the bottom to hunt the fish into the net.  
trawl has a significant negative impact on the ecosystem. Not only does this fishery come into direct contact with the bottom, but it is also known for a lot of bycatchBycatch:
Species caught next to species targeted for fishery. By-catches can consist of non-commercial species and species that are too small, and can be kept (this part is sometimes called by-product) or thrown back into the sea (discards). 
and discardsDiscards:
Unwanted by-catch, which is thrown back because there is no quota, the market price is too low, or the fish is below the legal minimum landing size. Discards can be alive or dead.
of other species, including endangered and protectedProtected species:
Many marine species are protected from deliberate or intentional disturbance, capture, injury and killing, and in some cases possession or sale. Species are often protected if they play an important role in the ecosystem or are sensitive to fishing. These marine species are protected regardless of whether they are inside or outside marine protected areas.
species.

Dab is not managed with specific management measuresManagement measures:
For fisheries, management measures can affect the amount of fish that can be caught, the type of gear that can be used and where fishing is and is not allowed.
. Catch surveys provide reliable information to monitor the population of this species. The managementManagement:
The regulations surrounding fisheries and aquaculture that ensure that production is carried out within legal frameworks and that sustainability can be assured.
of this species is partially effective.

ASC label

Fish with the ASC label is farmed in a sustainable manner.

MSC label

Fish with the MSC label is caught sustainably.

Good fish

This fish is not being overfished or is being responsibly farmed, with minimal impact on the environment.

Second choice

This fish is a second choice. There are still some improvements to be made in this fishery or fish farm.

Avoid

Do not buy this fish. It's being overfished or the way it's farmed or caught has a negative impact on the environment.

Welfare

There is fish available of this species that is farmed or caught using high welfare standards.

GlobalG.A.P.

GlobalG.A.P. certified farms are doing a step in the right direction in terms of sustainability. A few species with this label are getting a better score on the VISwijzer.

Organic

Organic standards are the strictest when it comes to fish feed. They also require certain measures for animal well-being.

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