Na+ efflux rates were also assessedinresponse tohandling stress
using methods similar to Glover et al. (2012). Fish were exposed
to handling stress in a manner identical to that of influx trials,
although rates were measured both as individuals and in groups.
This was to determine any effect of grouping on the stress response,
as inanga are schooling fish (Mitchell, 1989) and therefore may
exhibit altered stress in groups