Clock Zoo

A Blog Around The Clock

Category archives for Clock Zoo

Biological Clocks in Protista

Writing a chronobiology blog for a year and a half now has been quite a learning experience for me. I did not know how much I did not know (I am aware that most of my readers know even less, but still….). Thus, when I wrote about clocks in birds I was on my territory…

As we mentioned just the other day, studying animal behavior is tough as “animals do whatever they darned please“. Thus, making sure that everything is controlled for in an experimental setup is of paramount importance. Furthermore, for the studies to be replicable in other labs, it is always a good idea for experimental setups to…

Yup, that was going to be the title of this post. I got the paper and was ready to write the post when I noticed that Peter scooped me and posted about the same paper today (yup, there is just not that many cool papers on Charismatic Marine Megavertebrates to spread around this week). I…

Do whales sleep?

It is Marine Megavertebrate Week right now, so why not take a look at one of the most Mega of the Megaverts – the grey whale (Eschrichtius robustus): Do whales sleep? You may have heard that dolphins do – one hemisphere at the time, while swimming, and not for very long periods at a time.…

A new paper just came out today on PLoS-Biology: Glucocorticoids Play a Key Role in Circadian Cell Cycle Rhythms. The paper is long and complicated, with many control experiments, etc, so I will just give you a very brief summary of the main finding. One of the three major hypotheses for the origin of circadian…

Me and the Copperheads

Last week I had lunch with a good old friend of mine, Jim Green. He got his degree in Zoology, then a law degree (patent law) and is now coming back for yet another degree in biological and chemical engineering. He did his research on snakes, so we reminisced and laughed about the time several…

There are several journals dedicated to biological rhythms or sleep. Of those I regularly check only two or three of the best, so I often miss interesting papers that occur in lower-tier journals. Here is one from December 2006 that caught my eye the other day: Mammalian activity – rest rhythms in Arctic continuous daylight:…

No other aspect of behavioral biology is as well understood at the molecular level as the mechanism that generates and sustains circadian rhythms. If you are following science in general, or this blog in particular, you are probably familiar with the names of circadian clock genes like per, tim, clk, frq, wc, cry, Bmal, kai,…

Eight Hours a Circadian Rhythm Do Not Make

This post is a relatively recent (May 24, 2006) critique of a PLoS paper.

Serotonin, Melatonin, Immunity and Cancer

Making connections (from January 22, 2006)…