[en] Fluctuations of ν and E_γ in resonances of ²³⁵U(n,f) were measured in earlier experiments. Recently fission fragment mass- and total kinetic energy distributions of ²³⁵U(n,f) were determined for single isolated resonances, resonance groups and energy bins in the energy range from 0.006 eV to 130 eV in an experiment at GELINA. Fluctuations of the symmetric fission fragment yield and of the asymmetric fragment peak shapes were observed. These fluctuations are interpreted as fluctuations of fission exit channel populations: by the superlong symmetric and the two asymmetric standard I and standard II exit channel populations. Mainly the fluctuations in the standard I and the standard II exit channels cause variations in the average reaction < Q>E_i-values. Correlated with the fluctuations of the mass yields in the asymmetric mass peaks also strong fluctuations of the total kinetic energy averaged over all fragments < TKE>E_i are observed, which are anti-correlated with νE_i, the number of promptly emitted neutrons. It is explained, contrary to earlier assumptions, why the asymmetric and not the symmetric fission fragment yield fluctuations cause the fluctuations in ν and E_γ from resonance to resonance. It can also be concluded that the ν-fluctuations are not J-dependent. (author). 19 refs, 4 figs