West Coast Groundfish Observer Program Manual, Part2 - NOAA

which must be discarded in the groundfish fisheries
R
R.D.F. - Radio direction finder
Radio Call Sign - four letters and/or numbers, which are an international identifier of a vessel. The
International Radio Call Sign (IRCS) is painted in large letters on the side of each vessel and on the deck of
the flying bridge.
Random - Relating to a set, each of whose elements have an equal probability of occurring in a sample.
These elements are chosen as sample units in a manner, which eliminates subjectivity.
Random sample frame - The population divided into independent countable units.
Regenerated scale - a fish scale that has grown in to replace one that was lost. Regenerated scales are
useless for aging a salmon, but can be used to identify it to species.
Reserve - a portion of quota set aside at the beginning of the fishing year to allow for uncertainties in
preseason estimates of DAP catch
Riblines - heavy lines or chains that run down the length of the trawl net to strengthen it
Roller - A device made up of one or more metal pins that spin allowing the groundline to be pulled up and
over the rail of a vessel during retrieval such that tension and friction on the line is reduced.
Roller station/pit - Term used to describe the area where fishermen stand while retrieving the line and gaffing
fish coming in over the roller.
Rollerman - A crewman who stands in the roller station and monitors the retrieval of the gear. The rollerman
lands any commercially valuable fish and excludes any non-commercially valuable fish from being landed.
Rostrum - a pointed, calcareous, median extension on the anterior end of crab carapaces
Round weight - the weight of the whole fish (or animal) as it was when alive, synonymous with fresh weight
and whole weight
Roundfish - fish that orient themselves in the water with the dorsal side towards the surface and ventral side
towards the bottom
“Run pots” - A phrase used interchangeably with “retrieve pots”. It is the phrase used in the vessel logbook
to indicate the number of pots that have been retrieved from a string.
S
Sample size - The portion of the population that is sampled.
Sample type - The method used to select part of a population. This includes basket, whole haul, partial haul,
and the pre-sorted “X” sample types.
Sample weight - The actual weight in kilograms of a composition sample.
Sampling - The process of selecting part of a population for the purpose of determining the parameters, or
characteristics, of the whole population. Composition sampling refers to taking samples of a haul in order to
determine the fishing mortality of species occurring in the sample.
Scupper - a hole in the bulwarks which allows water to drain from the deck
Segment of Gear - In this manual a segment of gear refers to the standard unit the vessel uses for measuring
gear. This could refer to a mag, skate, tub, or coil of gear.
Set - The entire length of groundline from the first hook to the last hook, also referred to as a “string” of
gear.
Sheave - a wheel with a grooved rim, such as is mounted in a pulley block to guide the rope or cable
Shot - A pre-measured length of buoy line, usually 10 to 20 fathoms long. Normally there are two set
lengths, a “Long” shot and a “Short” shot. When setting a string, the skipper will tell the crew how many
shots to tie to a pot for various bottom depths.
Skate - a length of longline gear, usually 100 fathoms or 600 feet long
1/30/2004 A- 77