Guys :

One of the things that makes Hannon's info very interesting is the thousands of hours of spent underwater filming and watching. I have a tape he does which is full of comments most excellent a few of them odd. His comments are based on large lake/river observations and some seem not as applicable to pond LMB.

I have a paper on ranges of LMB all types. I will locate and post. LMB do feed in the winter but their metabolism slows down . I will check on temps. at which feeding slows. I am fairly sure it depends on genetics and local adaptation. My memory is those Calif. lakes never get real cold so the LMB track the RT to the DO/cool/thermocline in summer and in winter they can all be up in the water due to temp mixing. I will see if I can find a few answers or maybe just more questions.

Update. It looks like the water temp. line for LMB metabolism slow down is 10 C or 50 F +-. Does anyone have a temp. profile for the SoCal lakes. If so we might come up with an answer/guess.