LBSPRSim: Per-Recruit Length-Based Spawning Potential Ratio Simulation...

Description Usage Arguments Author(s) References


Function that takes stock (biology) and fleet (selectivity and fishing mortality) parameters and returns expected equilibrum size strucure of the catch and spawning potential ratio.


LBSPRSim(StockPars, FleetPars, SizeBins = NULL, P = 0.001, Nage = 101)



The life-history parameters of the stock.


The relative fishing mortality (F/M) and the selectivity-at-length parameters.


Optional - specifies the maximum length bin (ToSize) and the length increment of the binned length data (Linc). If empty, Linc = 5 and ToSize = Linf + MaxSD * SDLinf


Percentage of initial cohort still alive at maximum age.


Maximum age of generic age-strucured model. Not sensitive, unless set too low (e.g., < 50).


A. Hordyk


Hordyk, A.R., Ono, K., Sainsbury, K.J., Loneragan, N., and Prince, J.D. 2015. Some explorations of the life history ratios to describe length composition, spawning-per-recruit, and the spawning potential ratio. ICES J. Mar. Sci. 72: 204-216.

Hordyk, A.R., Ono, K., Valencia, S.R., Loneragan, N.R., and Prince, J.D. 2015. A novel length-based empirical estimation method of spawning potential ratio (SPR), and tests of its performance, for small-scale, data-poor fisheries. ICES J. Mar. Sci. 72: 217-231.

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