ssbpurec               package:FLCore               R Documentation

_M_e_t_h_o_d _s_s_b_p_u_r_e_c

_D_e_s_c_r_i_p_t_i_o_n:

     Calculates the Spawning Stock Biomass per unit recruit for an
     'FLStock' object.

     The method calculates SSB per recruit at zero fishing mortality.

_G_e_n_e_r_i_c _f_u_n_c_t_i_o_n:

     ssbpurec(object)

_M_e_t_h_o_d _a_r_g_u_m_e_n_t_s:


     '_o_b_j_e_c_t' : an object of class 'FLStock'.

     '_s_t_a_r_t, _e_n_d' : The first and last year over which SSB per recruit
          is to be calculated. By default the first and last year of
          the 'FLStock' object are used.

     '_t_y_p_e' : The type of calculation to perform. Currently only
          non-parm (non parametric) is supported whereby the SSB per
          recruit is calculated using mean values over the specified
          time period.

     '_r_e_c_s' : The proportion of the year in which recruitment occurs.

     '_s_p_w_n_s' : The proportion of the year in which spawning occurs.

     '_p_l_u_s_g_r_o_u_p' : Is the last age a plusgroup TRUE/FALSE

_M_e_t_h_o_d_s:


      _s_i_g_n_a_t_u_r_e(_o_b_j_e_c_t=_F_L_S_t_o_c_k) : Returns the SBB-per-unit-recruit.

_A_u_t_h_o_r(_s):

     The FLR Team

_S_e_e _A_l_s_o:

     FLStock-class

_E_x_a_m_p_l_e_s:

     data(ple4)
     ssbpurec(ple4)

     ssbpurec(ple4, start=1980, end=2000)

