Copy of `CEFAS - Agricultural and fisheries glossary`

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CEFAS - Agricultural and fisheries glossary
Category: Agriculture and Industry > Fishing
Date & country: 19/11/2007, UK
Words: 38


ACFM
The ICES Advisory Commitee for Fisheries Management. http://www.ices.dk/ Â

BBSRC
Biotechnology and Biological Sciences Research Council. www.bbsrc.ac.uk

Bosom
The central part of the trawl between the wings

CCW
Countryside Council for Wales www.ccw.gov.uk

Copepod
A small planktonic crustacean

Copepodite
A development stage of copepods which follows the nauplius stage. It is segmented with more than 3 pairs of appendages

Demersal
living or found in the deepest part of a body of water

DfT
UK Government Department for Transport www.dft.gov.uk

DTI
UK Government Department for Trade and Industry www.dti.gov.uk

EDC
Electronic Data Capture

ELISA
Enzyme-Linked Immunosorbent Assay

EU
European Union europa.eu

Eutrophication
The undesirable disturbance to ecosystem health and water quality that arises from nutrient enrichment caused by man's activity

FSA
UK Governments Food Standards Agency. www.food.gov.uk

GIS
Geographical Information System

IACMST
The Inter-Agency Committee on Marine Science and Technology

ICES
International Council for the Exploration of the Sea. www.ices.dk

IUCN
The World Conservsation Union. www.iucn.org

JNCC
Joint Nature Conservation Committee www.jncc.gov.uk

Lengtheners
Two pieces of netting which are joined along the sides to increase the trawl length between the belly and the cod end

Mean Water Level
the height above a fixed datum of the average water level over the sampling period

NAWAD
National Assembly for Wales Agricultural Department www.wales.gov.uk

NEAFC
The North East Atlantic Fisheries Commission. www.neafc.org

NERC
Natural Environment Research Council. www.nerc.ac.uk

NFFO
The National Federation of Fishermen's Organisation. www.nffo.org.uk

OSPAR
Oslo and Paris Commission www.ospar.org

Otolith
A calcified structure used as part of the balance system in bony fishes. The mineral structure changes over time and annual banding can be seen in the otolith allowing scientists to estimate the age of a fish. More InformationÂ

Otter Trawl
A trawl held open horizontally by otter boards

Peak Wave direction
the mean direction at Tpeak

Pelagic
The upper layers of a body of water

POM
Princeton Ocean Model

Recruitment
The number of new juvenile fish reaching a size where they come large enough to catch via commercial fishing methods

Seine Net
This is a bottom fishing method where fish are surrounded by warps laid out on the seabed with a trawl shaped net at mid lengths. As the warps are pulled in the fish are herded into the path of the net and caught

Spread
the directional spread at Tpeak

Square
The square is a single sheet of netting which joins the belly and the top wings and acts as a cover to prevent the fish from escaping the path of the trawl by swimming upwards clear of the net

Top wing
There are two top wings to a trawl which are tapered along the half mesh on the inside selvedge and straight along the outer edge. They have a dual purpose as they act as a side wall of the trawl and also additional fore cover joined to the square

Tz - Average wave period
The average or mean wave period that is also called the zero-crossing wave period

Wave direction convention
The wave direction convention defines wave direction as the direction from which waves come measured clockwise from magnetic north. Magnetic north is used instead of true north so that users can collect and process directional wave data without entering magnetic corrections before every deployment to account for local variations of the earth’s magnetic field. Corrections can be made after data collection and analysis to interpret wave directions in terms of true north