The frequencies of female or male fish did not differ significantly between the different treatments.
The TPC and TMC for each brand of fish did not differ significantly from each other (p > 0.05).
Survival of the fish did not differ between genotypes (binary logistic regression; Wald χ2 = 0.12, p = 0.73) but did vary with temperature (Wald χ2 = 20.9, p<0.001) with no significant interaction (Wald χ2 = 4.3, p = 0.50).
The mean relative velocity swum (in bl · s−1) by the fish did not differ significantly between the naturally- and hatchery-reared groups (natural 5.0±0.5 bl · s−1, hatchery 4.8±0.3 bl · s−1; Mann-Whitney U test, P = 0.45).
Growth performance and feed utilization of the fish are given in Table 3. Survival of fish did not differ significantly (P > 0.05) among treatments.
We considered the trajectories of non-switched fish as being reached, when the body sizes of the respective switch and non-switched fish did not differ significantly from each other anymore (i.e. P > 0·05, t-tests).
Median self-reported consumption of meat and fish did not differ between the participating women and 25 34 year old women participating in the national food consumption survey Riksmaten 1997 98 [ 47].
Once all fish had learnt to navigate the maze without guidance, they gradually decreased latency, but large- and small-brained fish did not differ in overall latency (GLMMday4 14: brain size selection line: F 1,33 = 1.47, P = 0.234; day of experiment: F 1,347 = 4.84, P = 0.028), suggesting no motivational differences.
Using two-tailed Wilcoxon matched pairs signed-rank tests, we revealed that the physiological and energetic characteristics of harvested fish did not differ from those of the successful migrants despite evaluating a number of biochemical (e.g. plasma metabolites, cortisol, plasma ions, gill Na+/K+-ATPase) and energetic (e.g. gross somatic energy density) variables (P's all >0.10).
In other words, the snout width of thin- and thick-lipped fish does not differ but the head is thinner and more tapered in the thick-lipped fishes.
