Initial sizes of wild-type, domestic/wild hybrid, and transgenic rainbow trout used in experiments, and the total numbers of fish used in each.

Initial mean sizes of mesocosm stream fish were calculated from a subsample of each family and genotype. For the control fish in mesocosm stream experiment 1, there were no statistically significant differences in lengths or masses between genotypes. Numbers of fish used in each experiment are also presented. Note that within each mesocosm stream experiment, genotypes were exposed to different experimental treatments (e.g. with predators, without predators). See the Material and Methods section and Fig. 1 for further details.
W = wild-type.
TW = transgenic from wild background.
DW = domestic/wild hybrid.
TD/W = transgenic from domestic/wild hybrid background.
Control = fish held in environmentally stable hatchery tanks, fed maximally, and without predation pressure or complex flow regimes.
Initial sizes of wild-type, domestic/wild hybrid, and transgenic rainbow trout used in experiments, and the total numbers of fish used in each.