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R & D
Research and Development
Raceway
A long narrow pond where the water inlet and outlet are at opposite ends.
Radial symmetry
A basic body plan in which the organism can be divided into similar parts or shapes around a central axis, like rays extending out from the centre – the organism exhibits no left or right sides; they have a top and a bottom (dorsal and ventral) surface only, e.g., sea stars and sea jellies.
Radiant energy
The energy of electromagnetic waves.
Radula
Tongue-like feature in the mouth of certain molluscs consisting of rows of horny teeth used to scrape food off rocks or to create depressions in rocks that the mollusc uses for habitat.
Range
Geographic area or location in which a species is recorded, even if only rare or single sightings.
Ratio
Relation in degree or number between two similar things.
Recreational Fisher
Person who fishes for recreational purposes; catch for own personal use.
Recreational Fishing
Fishing for pleasure, to catch a feed of fish.
Release weight
A weighted barbless hook connected to a fishing rig that is attached to a fish to be released.
Recreational fisher
Person who fishes for recreational purposes; catch for own personal use.
Recreational fishing
Fishing for a purpose other than a commercial purpose.
Recruitment
Addition of fish to a stock or population as a result of reproduction, migration or growth to legal size.
Recruitment overfishing
occurs in circumstances where an increase in fishing effort from current levels will cause a decline in recruitment to a fishery.
Recycle
Processing used or unwanted materials for the creation of new materials or products.
Reds (Rock Lobster)
Non-migrating, darker coloured rock lobsters.
Representative sample
A small part of something intended as representative of the whole.
Reptile
Cold-blooded, usually egg-laying vertebrates of the class Reptilia, having an external covering of scales or horny plates and breathing by means of lungs. Includes snakes, lizards, crocodiles, turtles and dinosaurs.
Resource
A stock or reserve that can be drawn upon.
Retractor muscle
The muscle that pulls a snail or bivalve animal back into its shell.
Reuse
To use an item more than once for the same or another purpose.
RFAC
Recreational Fishing Advisory Committee
RFTF
Recreational Fishing Trust Fund
Rhizome
Horizontal underground stem bearing buds in axils of reduced scale-like leaves.
RIRDC
Rural Industries Research and Development Council
Risk
A danger or hazard that could lead to loss or injury.
River
A natural stream of water of considerable volume, larger than a creek or brook.
RLIAC
Rock Lobster Industry Advisory Committee
Rod
Pole used in angling.
Rostrum
Central, forward-projecting and occasionally long spine between the eyes of crustaceans.
RRFAC
Regional Recreational Fishing Advisory Committee
Rubbish
Material that is worthless and is to be disposed of.
Run
Seasonal migration undertaken by fish. Fishers may refer to increased catches as a ‘run’ of fish.
Run-off
Water from rainfall that is not absorbed into the ground, instead flowing into streams or other surface waters or land depressions.