Incidental catch

In fishing, incidental catch is that part of the catch which was not originally targeted, but was caught and retained anyway. It can be contrasted with discards, which is that part of the catch which was not originally targeted, but was caught and returned to the sea, and bycatch, which is for all the species caught apart from the targeted species.

Bycatch = Incidental catch + Discarded catch

The operational definitions used by the FAO for incidental catch and other related catches are as follows:[1]

Target catch: The catch of a species or species assemblage which is primarily sought in a fishery, such as shrimp, flounders, cods
Incidental catch: Retained catch of non-targeted species
Discarded catch (usually shortened to discards): That portion of the catch returned to the sea as a result of economic, legal, or personal considerations.
Bycatch: Discarded catch plus incidental catch.

Notes

Alverson DL, MH Freeberg, SA Murawski and Pope JG (1994) A global assessment of fisheries bycatch and discards FAO Fisheries, Technical paper 339, Rome. ISBN 92-5-103555-5.

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References

Johnson, Douglas H; Shaffer, Terry L and Gould, Patrick J (1990) Incidental Catch of Marine Birds in the North Pacific High Seas Driftnet Fisheries U.S. Geological Survey.
Valdemarsen, John W Incidental catch of seabirds in longline fisheries UN Atlas of the Oceans: Fishery Technology Service.

Fisheries science and wild fisheries

Fisheries science	Population dynamics of fisheries Shifting baseline Fish stock Fish mortality Condition index Stock assessment Fish measurement Standard weight in fish Fish counter Data storage tag Catch per unit effort Otolith microchemical analysis Biomass Fisheries acoustics Acoustic tag Coded wire tag GIS and aquatic science Pop-up satellite archival tag EcoSCOPE Age class structure Trophic level Trophic cascades Hydrographic containment Match/mismatch hypothesis Fisheries and climate change Marine biology Aquatic ecosystems Bioeconomics EconMult Ecopath FishBase Census of Marine Life OSTM Fisheries databases Institutes Fisheries scientists
Wild fisheries	Ocean fisheries Diversity of fish Coastal fish Coral reef fish Demersal fish Forage fish Pelagic fish Cod fisheries Crab fisheries Eel fisheries Krill fisheries Kelp fisheries Lobster fisheries Shrimp fishery Eel ladder Fish ladder Fish screen Migration Salmon run Sardine run Shoaling and schooling Marine habitats Marine snow Water column Upwelling Humboldt current Algal blooms Dead zones Fish kill

Fisheries management, sustainability and conservation

Management	Fisheries management Fisheries law Monitoring control and surveillance Vessel monitoring system Fishery Resources Monitoring System Catch reporting Fisheries observer Illegal, unreported and unregulated fishing Magnuson–Stevens Act Pulse fishing Fisheries organizations
Quotas	Catch share Individual fishing quota Minimum landing size Slot limit Bycatch Discards Incidental catch Cetacean bycatch Turtle excluder device Shrimp-Turtle case EU quotas EU MLS Exclusive economic zone
Sustainability	Sustainable fisheries Maximum sustainable yield List of harvested aquatic animals by weight Sustainable seafood Overfishing Environmental effects of fishing Fishing down the food web Destructive fishing practices Future of Marine Animal Populations The Sunken Billions The End of the Line
Conservation	Marine Protected Area Marine reserve Marine conservation Marine conservation activism Salmon conservation Grey nurse shark conservation Shark sanctuary
Organisations	The Black Fish Marine Stewardship Council Aquaculture Stewardship Council Friend of the Sea SeaChoice Seafood Watch Ocean Conservancy Ocean Outcomes Oceana Save Our Seas Foundation Sea Around Us Project WorldFish Center Defying Ocean's End HERMIONE PROFISH International Seafood Sustainability Foundation Sea Shepherd Conservation Society Greenpeace National Marine Fisheries Service U.S. Fish and Wildlife Service
Related issues	CalCOFI Fish slaughter Marine pollution Mercury in fish Shark culling Shark finning Threatened sharks Threatened rays
List of fishing topics by subject Index of fishing articles Fisheries glossary

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