4.5. Social density
Despite the lake-pens at Georgie Lake having a 4-fold lower rearing
density than in the circular tanks at Dalrymple, the smolts were not
evenly dispersed. Thus, the social density “chosen” by the Georgie Lake
fish was considerably higher than their rearing density. The simplicity
of the experimental setup prevented us from accurately measuring
NND; however, the relative fish density was similar for both locations
and on board the Sterling Carrier. The Dalrymple fish were habituated
to a higher rearing density and consequently may have attempted to
maintain a similar social density while aboard the Sterling Carrier.
Similarly, previous experience may explain why the Georgie Lake fish