Fishing selectively for particular species or sizes of fish.
An organisms location in the biological classification system used to identify and group organisms with similar physical, chemical and/or structural composition.
threat abatement plan
A plan formalised under endangered species legislation to counter the effects of a listed key threatening process.
total allowable catch
For a fishery, a catch limit set as an output control on fishing; see also output controls and quota.
A marked change in the annual growth pattern requiring an adjustment to age-reading criteria
A growth zone that allows passage of light and forms part of the annual growth pattern that usually represents a period of faster growth; on otoliths it appears clear under ...
Fishing by means of traps, often designed to catch a particular species, e.g. rock lobster pots.
Discarded catch having no commercial value, especially for trawlers.
A type of active fishing method in which a large bag-like net is drawn along behind a boat in order to target either demersal or pelagic fish species. Many variations on this ...
A fishing method in which lines with baits or lures are dragged by a vessel at a speed of 2-10 knots. Trolling is used Australia-wide to catch fish such as Spanish mackerel, ...
turtle exclusion device
A modification to prawn trawl nets which, while retaining prawns, allows turtles to escape.
1. Relating to or resembling a drum
2. Of or relating to the middle ear or eardrum.
A fish stock that has potential to sustain catches higher than those currently taken.
The number or weight of all fish in a stock that lie within the range of sizes customarily considered usable (or designated so by law). Also called: standing crop.
The part, by number, of the fish alive at a given time, which will be caught in future.
Animals with a backbone, including fish (sharks, rays and bony fish), amphibians, reptiles and mammals; see also invertebrates.
Commercial fishing vessels are classified according to their gross registered tons (grt) of displacement. Vessels displacing less than 5 tons are not routinely monitored, and are ...
The biomass of a stock that has not been fished (also called the unfished or unexploited biomass).
virtual population analysis
A mathematical modelling technique used in stock assessment, whereby the number of fish in each cohort is estimated from numbers in the next oldest or next youngest age ...
Giving birth to living offspring that develop within the mother\'s body. Most mammals and some other animals are viviparous.
Under endangered species protection legislation, a species that within 25 years will become endangered unless mitigating action is taken; see also endangered species.
Fish in a stock born in the same year. For example, the 1987 year class of cod includes all cod born in 1987, which would be age 1 in 1988. Occasionally, a ...
Individuals spawned in the same year (or spawning season, when that spans the end of one year and the beginning of the next).
yield per recruit
The expected lifetime yield per fish of a specific age (e.g., per age 2 individual). For a given exploitation pattern, rate of growth, and natural mortality, an expected ...
Analysis of how growth and natural mortality interact to determine the best size of animals to harvest; e.g. it may be more beneficial economically for fish to be caught when ...
Plankton that consists of animals, including the corals, rotifers, sea anemones, and jellyfish.
Fish that are caught in \'fish-out\' ponds, where this term refers to holding facilities from which anglers can take fish upon payment of a fee.