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Glossary
Winking Fish
Glossary

Download the Glossary To download the Glossary (MS Word RTF format, 66kB)

D - F


Italics have been used where the word or term appears with its own definition in this Glossary.

A B C D E F G H I J K L M N O P Q R S T U Z Maori terms

Term

Description

Danish seining

A method of fishing where a net bag is operated by a long rope fixed to each end, the net encircles, herds and traps the fish.

Declining fishery

The state a fishery is said to be in when a fish stock is overfished.

Deed of Settlement 1992

Signed in December 1992. Came about through the Treaty of Waitangi (Fisheries Claims) Settlement Act. Settled Maori claims to commercial fisheries. This has been supported by more recent legislation such as the Fisheries Act 1996.

Deepwater enterprise allocation system

This system was introduced in 1983, it allocated quotas for some species for a limited period and was a forerunner to today’s Quota Management System.

Deepwater species

These species are harvested at depths ranging from 200-1000 metres, mainly during winter. The main concentrations of deepwater species in NZ’s EEZ are between 40-55degrees South.

Demersal fish

Bottom feeding fish.

Density

The number of individuals that may be present in each unit of area.

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Depletion

The gradual use or consumption of a resource, especially a natural resource.

Developing fishery

A fishery where there is a period of low catches followed by a rapid rise in catches. This may be because a new stock of a known species has been found, or a new species discovered or because catching and processing technologies and/or new markets have developed.

Dinoflagellates

One of the main groups of marine phytoplankton. Some of these tiny organisms are responsible for red tides/algal booms.

Distribution

The way individual fish of a species are spread through an area.

DNA

Deoxyribonucleic acid.

Drag netting

A fishing method where a net and length of rope are laid out from and back to the shore and retrieved by hauling on to the shore.

Dredging

A fishing method used to target scallops and oysters. When dredging for scallops a rigid steel framed dredge is towed along the sea floor. When dredging for oysters a steel ring mesh is used.

Drift netting

A fishing method used for catching pelagic fish, the vessel remains tied to one end of the net to stop it drifting too far. Fish swim into the net and are caught behind the gills.

Echo sounders

An instrument that sends out an acoustic pulse in water and measures distances in terms of the time for the echo of the pulse to return.

Eel weirs

A type of fence placed in a stream or river to catch and retain eels.

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EEZ

Exclusive Economic Zone:
New Zealand has a 200 nautical mile (nm) Exclusive Economic Zone that was declared in 1978. The EEZ formally extends from 12 – 200 nm with the area from the coastline out to 12nm known as the Territorial Sea.

Egg production method

Using to estimate the spawning biomass of fish via a probe attached to a plankton net. This probe measures the depth and temperature at which the eggs were collected and it is possible from this info to estimate the total spawning biomass of the fish under investigation in the area.

Enhancement

Work done to build up "wild" stocks. Can involve releasing hatchery-reared young into the wild or providing additional protection to naturally spawned juveniles.

Estuary

The wide part of a river where it nears the sea where fresh and salt water mix.

FIB

Fishing Industry Board:
This organisation represented some sectors of the commercial fishing industry. A review of this organisation led to the establishment of the New Zealand Seafood Industry Council (SeaFIC).

Filter feeders

Species that trap food particles as they pump water through a filter.

Finfish

True fish, as distinguished from shellfish.

Fish stock

A group of individuals of the same species which are living together in the same area and can intermingle and interbreed freely. Different stocks of the same species, e.g. snapper, can be genetically different.

Fishery

A general term for the combination of fishers, vessels and fishing gear involved in catching fish from a stock, as well as the fishing grounds and the catch.

Fishing Industry Association A fishing industry organisation set up to represent the interests of most of the larger quota holding fishing and processing companies. This group no longer exists and the representative organisation for most of those involved in fishing and processing is the Seafood Industry Council - SeaFIC.

Flounder

Any one of the species of fish known as flatfish, e.g. black flounder, brill, greenback flounder, lemon sole, N.Z. sole, sand flounder, turbot and yellowbelly flounder.

Foreign licensed vessel

A vessel that is not New Zealand registered, but has a special license to fish in New Zealand’s EEZ. These licenses are only granted to countries that the New Zealand Government has special agreements with.

Freshwater

A natural water resource that is not salty.

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