Just an observation, but the cold water activity here is completely different between my hatchery pond, and my big pond. The CNBG in the big pond, seemed to have acclimated to the cooler water over the years, and will eat 2-3 days after surface ice. The CNBG in the hatchery pond, came from Buffalo last spring, and will vanish for weeks at a time if there is any cold snap, or a water temp drop after cooler rain. I've done as much as setting game cameras all around the pond to catch any otters, and none showed up. In the past 2 months I've only seen fingerlings twice in the hatchery pond, and that was last week. Now, they've disappeared again.
Personally, I wouldn't determine what's in a pond until spring hits, and the water warms up and stabilizes a bit. RBT and HSB would be my only exception.
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