  The exchange-degeneracy of the mesonic $f$, $\omega $, $\rho $ and $a_{2}$
Regge trajectories, dominant at moderate and high energies in hadron elastic
scattering, is analyzed from two viewpoints. The first one concerns the masses
of the resonances lying on these trajectories; the second one deals with the
total cross-sections and the ratios of the real to the imaginary parts of the
forward amplitudes of hadron and photon induced reactions. Neither set of data
supports exact exchange-degeneracy.
