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Government of Western Australia - Department of Fisheries

Glossary - I

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Fish fauna.

Industry Development Unit

Integrated Fisheries Allocation Advisory Committee

Integrated Fisheries Management

A practical method of humanely dispatching fish by spiking the brain with a sharp instrument.

Assists readers to imagine what is in the writer’s mind.

International Maritime Organisation

To have an effect upon.

An accumulation of water into ponds/ dams by human-engineered blocking of natural drainage.

Incidental catch
See bycatch.

Independent variable
A variable whose variation does not depend on that of another.

Indicator solution
A solution that indicates the degree of acidity or basicity of a solution through characteristic colour changes.

Indonesian Throughflow
Water flow through the Indonesian Archipelago to the Indian Ocean driven by South East trade winds in the Pacific Ocean.

Infrared ray
Electromagnetic radiation with wavelengths longer than that of visible light.

Animal that inhabits a place; a permanent resident.

A narrow opening by which the water penetrates into the land; a small arm of the sea.

Inner core
The innermost hottest part of the Earth as detected by seismological studies, is a primarily solid ball about 1,216 km (760 mi) in radius, or about 70% that of the Moon. It is believed to consist of an iron–nickel alloy, and may have a temperature similar to the Sun's surface, approximately 5505 °C.

Input controls
Controls on fishing to limit catches, e.g. pot numbers; seasonal closures; size, vessel or gear restrictions; or limiting of licences.

In the original or natural place or site.

Inshore waters (nearshore)
Waters of the shallower part of the continental shelf.

Latin term for ‘in the original place’.

Zone between high and low water marks that is periodically exposed to air.

Introduced species
A species living outside its native distributional range, which has arrived there by human activity, either deliberate or accidental.

Ability of an introduced species to adversely affect the habitats and bioregions they occupy economically, environmentally, and/or ecologically.

Animal without a backbone.

Indian Ocean Tuna Commission

An imaginary line connecting all parts of the ocean that have the same salinity.

Isotope signature
The ratio of stable or unstable isotopes (chemical forms) of particular elements.

Individual Transferable Effort

A schedule of planned events and activities outlined in chronological order.

Individual Transferable Quota

IUCN Red List
A list issued by the World Conservation Union describing the global conservation status of different plant and animal species.


Last modified: 11/09/2012 11:22 AM

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