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СЛОВАРИ ОНЛАЙН →  Fisheries — dictionary →  amph-aust avai-brac bran-cear ceck-cott crab-effl effo-expl f0.1-free fron-high hook-inte intr-leng limi-mini moda-nuch nucl-proj prot-refe refe-size size-stra suba-tagg targ-‘fis

Слова на букву targ-‘fis (32)

target fishing
targeting) Fishing selectively for particular species or sizes of fish.
taxonomic group
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
(TAC) For a fishery, a catch limit set as an output control on fishing; see also output controls and quota.
transition zone
A marked change in the annual growth pattern requiring an adjustment to age-reading criteria
translucent zone
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 ...
transmitted light
Light that is passed through an otolith.
trap fishing
Fishing by means of traps, often designed to catch a particular species, e.g. rock lobster pots.
trash fish
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.
usable stock
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.
utilized stock
(utilized population) The part, by number, of the fish alive at a given time, which will be caught in future.
validation of ageing method
Proving an age-reading method is accurate.
Animals with a backbone, including fish (sharks, rays and bony fish), amphibians, reptiles and mammals; see also invertebrates.
vessel class
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 ...
virgin biomass
The biomass of a stock that has not been fished (also called the unfished or unexploited biomass).
virtual population
Utilized stock.
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.
vulnerable species
Under endangered species protection legislation, a species that within 25 years will become endangered unless mitigating action is taken; see also endangered species.
winter zone
see annulus)
year class
(year cohort) 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).
Catch weight.
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 ...
yield-per-recruit analysis
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-out’ fish
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.

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