The sites were surveyed by two snorkelers 20 times from 2 August
to 7 September (on 2 August, only the 0.75-m sites were surveyed).
This period encompassed the total spawning run of sockeye salmon,
plus 1 week on either end. All sockeye females holding position
within the 5-m2 grid were counted, including those whose central
position was on the imaginary line connecting the corner points. To
provide a more specific measure of the temporal nature of egg deposition,
each female was identified as to whether she had or had not yet
completed spawning (see Quinn and Foote 1994). We refer to these
as “spawned out” and “breeding,” respectively.