yellowfin               package:UsingR               R Documentation

_Y_e_l_l_o_w _f_i_n _t_u_n_a _c_a_t_c_h _r_a_t_e _i_n _T_r_o_p_i_c_a_l _I_n_d_i_a_n _O_c_e_a_n

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

     Mean catch rate of yellow fin tuna in Tropical Indian Ocean for
     the given years.

_U_s_a_g_e:

     data(yellowfin)

_F_o_r_m_a_t:

     A data frame with 49 observations on the following 2 variables.

     _y_e_a_r The year

     _c_o_u_n_t Mean number of fish per 100 hooks cast

_D_e_t_a_i_l_s:

     Estimates for the mean number of fish caught per 100 hooks are
     given for a number of years. This can be used to give an estimate
     for the size, or biomass, of the species during these years
     assuming the more abundant the fish, the larger the mean. In
     practice this assumption is viewed with a wide range of attitudes.

_S_o_u_r_c_e:

     This data is read from a graph that accompanies Myers RA, Worm B
     (2003) "Rapid worldwide depletion of predatory fish communities".
     _Nature_ 423:280-283.

_R_e_f_e_r_e_n_c_e_s:

     See also <URL:
     http://www.soest.hawaii.edu/PFRP/large_pelagic_predators.html> for
     rebuttals to the Myers and Worm article.

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

     data(yellowfin)
     plot(yellowfin)

