We examined sculpins over 70 mm TL because these were most
abundant on the spawning grounds. We tested six sculpins of each
species in four size stanzas (70–79, 80–89, 90–99, and >99 mm). In
each container, we placed a single sculpin on one side of the divider
and a size-matched member of the other species on the other. No
interactions between sculpins were observed. For 7 days, we repeated
the process when at about noon each day, we gave each sculpin a set
number of fresh eggs and then collected all of the remaining eggs the
following morning (number eaten = number placed in pen – number
of whole eggs remaining). Three slimy sculpins (each >97 mm) died
during the experiment (two in 1993 and one in 1994) and were replaced