IBTS_data: The IBTS data after some processing as in vignette...

In andrew-edwards/sizeSpectra: Fitting Size Spectra to Ecological Data Using Maximum Likelihood

The IBTS data after some processing as in vignette MEPS_IBTS_1

Description

The IBTS data after some processing as in vignette MEPS_IBTS_1

Usage

IBTS_data

Format

Dataframe where each of 42,298 rows is a unique combination of Year, SpecCode and LngtClass. Columns are:

• Year: Year of survey

• SpecCode: Species code

• LngtClass: The minimum value (cm) of the 1-cm length bin, or the 0.5-cm bin for Atlantic Herring and European Sprat

• Number: Number of individuals per hour of trawling observed for that combination of Year, SpecCode and LngtClass.

• LWa: Length-weight coefficient \alpha from Fung et al. (2012) for that species, as per our MEPS equation (1).

• LWb: Length-weight coefficient \beta from Fung et al. (2012) for that species, as per our MEPS equation (1).

• bodyMass: Estimated body mass (g) for an individual of that species, assuming LngtClass to be the length.

Source

From preprocessing as per vignette MEPS_IBTS_1.

andrew-edwards/sizeSpectra documentation built on June 28, 2023, 7:09 p.m.