Internal wrapper function to calculate MSY reference points
optMSY_eq(x, M_ageArray, Wt_age, Mat_age, V, maxage, R0, SRrel, hs,
yr.ind = 1)
Simulation number
Array of M-at-age
Array of weight-at-age
Array of maturity-at-age
Array of selectivity-at-age
Vector of maximum age
Vector of R0s
SRR type
Vector of steepness
Year index used in calculations
Results from MSYCalcs