Extract species specific LENGTH-WEIGHT COEFFICIENTS from SVDBS — get_length_weight • survdat

Pulls the length-weight coefficients from SVDBS.LENGTH_WEIGHT_COEFFICIENTS table These coefficients are described in NOAA Tech Memo NMFS-NE-171.

Usage

get_length_weight(channel)

Arguments

channel: an Object inherited from DBIConnection-class. This object is used to communicate with the database engine. (see connect_to_database)

Value

Returns a data.table (nx12).

SVSPP: A standard code which represents a species caught in a trawl or dredge. Refer to the SVDBS.SVSPECIES_LIST
SVLWEXP: The exponent of the length-weight equation, b.
SVLWCOEFF: The natural log of the coefficient of the length-weight equation, ln a.

See also

Other helper: get_conversion_factors(), get_cruise_purpose(), get_maturity(), get_sex(), get_sex_fscs(), get_species(), get_strata(), get_vessel()