My HomepageMy homepage is at http://coturnix.org. It is temporarily stripped to minimal information, but more will come soon.
Search This Blog:
Bora Zivkovic on Morning at Triton Angie Lindsay Ma on Morning at Triton Linda chamblee on Morning at Triton Jekyll » Blog… on The Big Announcement, this tim… Mike H on The Big Announcement, this tim…
- Food goes through a rabbit twice. Think what that means!
- Grand Rounds Vol. 6 No. 49 - a conference in a tropical island resort
- BIO101 - Physiology: Coordinated Response
- BIO101 - Physiology: Regulation and Control
- The PepsiGate linkfest
- Postscript to Pittendrigh's Pet Project - Phototaxis, Photoperiodism and Precise Projectile Parabolas of Pilobolus on Pasture Poop
- The Irish-Serbian connection
- Why republish an old blog post?
- BIO101 - Protein Synthesis: Transcription and Translation
- ScienceOnline2010 – interview with Kelly Rae Chi
- #FieldNotes: Let the sleeping apes lie fieldofscience.com/2015/04/fieldn… 2 days ago
- Field of Science: #FieldNotes: Let the sleeping apes lie fieldofscience.com/2015/04/fieldn… 3 days ago
- Why are there so few ice age megafaunal kill sites? contemplativemammoth.wordpress.com/2015/04/21/why… 3 days ago
- Why we can’t stand free-range parenting | News & Observer newsobserver.com/opinion/op-ed/… 5 days ago
- How Washington Derailed Amtrak - nationaljournal.com/magazine/amtra… 5 days ago
- (Psychology Today) Science and the online dating profile wp.me/p50QUt-4g 5 days ago
- 12 guidelines for surviving science… pacificsoutheast.wordpress.com/2015/01/02/12-… 5 days ago
- “Charles Darwin, Vampire Slayer” ncse.com/blog/2015/04/c… 5 days ago
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.
Category Archives: Clock Tutorials
This is a summary of my 1999 paper, following in the footsteps of the work I described here two days ago. The work described in that earlier post was done surprisingly quickly – in about a year – so I decided to do some more for my Masters Thesis.
The obvious next thing to do was to expose the quail to T-cycles, i.e., non-24h cycles. This is some arcane circadiana, so please refer to the series of posts on entrainment from yesterday and the two posts on seasonality and photoperiodism posted this morning so you can follow the discussion below:
There were three big reasons for me to attempt the T-cycle experiment at that time:
One of the assumptions in the study of circadian organization is that, at the level of molecules and cells, all vertebrate (and perhaps all animal) clocks work in roughly the same way. The diversity of circadian properties is understood to be a higher-level property of interacting multicellular and multi-organ circadian systems: how the clocks receive environmental information, how the multiple pacemakers communicate and synchronize with each other, how they convey the temporal information to the peripheral clocks in all the other cells in the body, and how peripheral clocks generate observable rhythms in biochemistry, physiology and behavior.
This April 09, 2006 post places another paper of ours (Reference #17) within a broader context of physiology, behavior, ecology and evolution.
The paper was a result of a “communal” experiment in the lab, i.e., it was not included in anyone’s Thesis. My advisor designed it and started the experiment with the first couple of birds. When I joined the lab, I did the experiment in an additional number of animals. When Chris joined the lab, he took over the project and did the rest of the lab work, including bringing in the idea for an additional experiment that was included, and some of the analysis. We all talked about it in our lab meetings for a long time. In the end, the boss did most of the analysis and all of the writing, so the order of authors faithfully reflects the relative contributions to the work.
What is not mentioned in the post below is an additional observation – that return of the food after the fasting period induced a phase-shift of the circadian system, so we also generated a Phase-Response Curve, suggesting that food-entrainable pacemaker in quail is, unlike in mammals, not separate from the light-entrainable system.
Finally, at the end of the post, I show some unpublished data – a rare event in science blogging.