I work with auditory development in bullfrogs -- basically what is
reasonably well known is that most Ranids and Xenopus shut down from about
October - April. It is virtually impossible to get decent neural
responses during this periopd. Discussions with Prof. Diane Lipscombe of
Brown University indicated that she had consistently observed a shut down
of expression during this period. Since we maintain our subjects on a 12
hour light/dark cycle with consistent food and temperature year round yet
still see this effect, there must be something extremely stable working as
a seasonal zeitgeiber independent of environmental cues even at the
I'm about to try something which has been used to overcome the
physiological shutdown in bats during winter, i.e., artificial
hibernation. If anything comes of it, I'll post.
Department of Neuroscienec
Dept. of Neuroscience
"But in the mud and scum of things, there always, always somthing sings."