The 143 galaxies with secure redshifts ( z _ { median } = 0.62 ) from the 1415+52 field of the Canada-France Redshift Survey has been imaged with median seeing of 0.67 arcseconds ( FWHM ) .
Structural parameters have been derived by fitting multi-component models and the results confirm two phenomena seen in a smaller sample of galaxies imaged with the Hubble Space Telescope .

First , 11 \pm 3 \% of the galaxies lie off the normal locus of colour vs. bulge fraction B / T .
This class of objects ( “ blue-nucleated galaxies ” or BNGs ) was identified using HST observations ( Schade et al .
1995 , CFRS IX ) and it was shown that they are associated with peculiar/asymmetric structure and merger/interactions .
The observed frequency of BNGs in this sample is 14 \pm 4 \% 0.5 < z < 1.2 and 6 ^ { +6 } _ { -3 } \% at 0.2 < z < 0.5 but the true frequency is likely to be a factor \sim 2 higher after corrections are made for the effect of asymmetric/peculiar structures .

Galaxy disks at 0.5 < z < 1.1 are found to have a mean rest-frame , inclination-corrected central surface brightness of \mu _ { AB } ( B ) = 19.8 \pm 0.1 mag arcsec ^ { -2 } , \sim 1.6 mag brighter than the Freeman ( 1970 ) value .
At low redshift ( 0.2 < z < 0.5 ) the mean surface brightness ( \mu _ { AB } ( B ) = 21.3 \pm 0.25 ) is consistent with the Freeman value .

These results are consistent with the HST observations .
With larger numbers of galaxies and therefore more statistical weight they demonstrate the capabilities , and limits , of ground-based work in the study of galaxy morphology at high redshift .