Witch

The stockStock:
The fish of a particular species reproducing in the same area in the same period.   of witch is not 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. The biomassBiomass:
Biomass is the mass (weight) of living organisms in an area or ecosystem at the time. of this species is considered to be low and there is an increased risk that the reproductive capacity of this stock will be affected by high fishing mortalityFishing mortality:
The share of the fish stock that dies annually by fishing. This is the size to which fishing pressure is examined.    .

BottomBottom trawls:
A fishing technique in which cone-shaped nets terminating in a codend are dragged through the water column or along the bottom. trawls are likely to cause significant negative impacts on the ecosystem by interacting with benthic habitats and species. 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).   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, is likely and often documented.

Witch is regulated by basic 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. and only have a marginal effect on this stockStock:
The fish of a particular species reproducing in the same area in the same period.  . 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 not effective.