... 21 to 53% for the first period of feed deprivation/re-feeding, and from 22 to 44%for the second period. In addition, the combination of all the experimentalperiods leads to a marked increase in ... in feed intake, from an increase in weight gain orfrom a modification of both variables. Moreover, the ratio confounds the variability of intake and gain, both of which are highly sensitive to ... W.A., Manual of procedures in quantitative genetics, Pullmann,Washington, 1967.Selection for residual feed intake in fish621Assuming that the in uence of temperature of growth is linear, this...