A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Term	Meanings
Latent effort	Fishing effort that is not currently deployed in a fishery (i.e. where there are vessels that are entitled to fish in a particular fishery, but for a variety of reasons have so far chosen not to fish in the fishery). If this latent effort is relatively large and becomes 'active', it may be sufficient to move the fishery from sustainable to unsustainable status.
LFB	Licensed Fishing Boat
Licence condition	The ability to fish in certain fisheries (such as the estuarine fishery), or to use certain fishing gear (such as power-operated net haulers or fish traps), or to take certain species of fish (such as mud crabs), as regulated by conditions on fishing boat licences.
Licensed Fishing Area	Diagrammatic representation of current Fisheries WA legislation for fishing and fishing activities.
Limited Entry Fishery	.Now called Managed Fishery, A fishery where the number of operators or vessels is restricted to control the amount of fishing effort. This frequently involves controls on the number and size of vessels, conditions relating to the transfer of vessels, and conditions relating to the transfer of fishing rights or the replacement of vessels; cf open access fishery
Line fishing	A general term used for a range of fishing methods that employ fishing lines in one form or another. It includes handlines, hand reels, powered reels, pole-and-line, droplines, longlines and troll lines.
Logbook	An official record of catch and effort data kept by fishers.
Longline	A fishing gear in which short lines carrying hooks are attached to a longer main line at regular intervals. Pelagic longlines are suspended horizontally at a predetermined depth with the help of surface floats. Demersal longlines are set at the seabed with weights.
MAC	Management Advisory Committee
Managed Fishery	A fishery declared by a management plan to be a managed fishery. In a Managed Fishery the number of operators or vessels is restricted to control the amount of fishing effort. This frequently involves controls on the number and size of vessels, conditions relating to the transfer of vessels, and conditions relating to the transfer of fishing rights or the replacement of vessels; cf open access fishery.
Management plan	A management plan is the rules and regulations governing a managed or interim managed fishery.
Mariculture	Fish farming or aquaculture of marine animals or plants.
Marine Park	State protected area with associated rules and restrictions to control activities such as fishing and boating
MARPOL	International convention for the prevention of pollution from ships.
Maximum sustainable yield	This can be defined in various ways, but originated from surplus production models as the maximum catch that can be removed from a stock over an indefinite period. MSY defined in this way makes no allowance for environmental variability, and studies have demonstrated that fishing at the level of MSY without taking any other environmental effects into consideration may not be sustainable in the longer term.
Migration	The systematic (as opposed to random) movement of individuals of a stock from one place to another.
Minimum legal size (or minimum size)	The legislated size below which individuals of the prescribed fish species, if caught, are not to be retained.
Minor Fishery	A Minor Fishery is one which is not currently cost recovered. Once a Minor Fishery becomes subject to cost recovery, it ceases to be a Minor Fishery.
Mortality	The rate of deaths (usually in terms of proportion of the stock dying annually) from various causes.
MOU	Memorandum of Understanding
MPG	Ministerial Policy Guideline
MSC	Marine Stewardship Council
MSY	Maximum sustainable yield

Derived from: Department of Fisheries publications; Fishery Status Reports. Resource Assessments of Australian Commonwealth Fisheries. 1998. Bureau of Resource Sciences, Department of Primary Industries and Energy, Canberra ACT; and Henderson's Dictionary of Biological Terms, published by Longman Scientific and Technical Press, 1989 (10th edition).