tag:blogger.com,1999:blog-1871542942842750523.post1100860959439677546..comments2023-07-24T10:40:57.739-04:00Comments on dechronization: The Price of ParenthoodGlorhttp://www.blogger.com/profile/17707197225963721646noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-1871542942842750523.post-90619114932759770102010-03-12T09:49:43.405-05:002010-03-12T09:49:43.405-05:00These physical manipulations are used for many typ...These physical manipulations are used for many types of studies in biology. Due to the correlated physical and hormonal changes that accompany the removal of an organ I have always found myself a little skeptical about their results. <br /><br />From an experimentalists point of view, I would much rather see hormone levels either manipulated in an experimental context without surgery, or controlled for in the case of surgical removal of various bits. Louis Guillette, Richard Jones, and others did a lot of work with hormone levels in A. carolinensis in the 1970's and 1980's. It should be possible, while not necessarily easy, to devise an experiment that incorporates these factors. Perhaps a reptilian birth-control injection can be developed that prevents anoles from developing eggs! (I'm only partially kidding on that.)Th.Sangerhttps://www.blogger.com/profile/17428619490804360716noreply@blogger.comtag:blogger.com,1999:blog-1871542942842750523.post-54010918009418886842010-03-10T17:20:24.889-05:002010-03-10T17:20:24.889-05:00Thanks Liam, I should have read your post more car...Thanks Liam, I should have read your post more carefully.Glorhttps://www.blogger.com/profile/17707197225963721646noreply@blogger.comtag:blogger.com,1999:blog-1871542942842750523.post-15358819968348589052010-03-10T14:03:10.029-05:002010-03-10T14:03:10.029-05:00Rich - I put this link in my post (in which they s...Rich - I put <a href="http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1690499/" rel="nofollow">this link</a> in my post (in which they show that child bearing shortened life in a historical human society, but that the effect was dependent on socioeconomic status); however, I'll bet you're right and that there are lots of other examples.Liam Revellhttps://www.blogger.com/profile/04314686830842384151noreply@blogger.comtag:blogger.com,1999:blog-1871542942842750523.post-81547803624846998472010-03-10T13:11:02.179-05:002010-03-10T13:11:02.179-05:00Surely someone has asked this question in humans a...Surely someone has asked this question in humans as well. Does having children lengthen or shorten human life span?Glorhttps://www.blogger.com/profile/17707197225963721646noreply@blogger.comtag:blogger.com,1999:blog-1871542942842750523.post-46806912788411018372010-03-10T09:22:41.712-05:002010-03-10T09:22:41.712-05:00Great work, although I expect - as the authors sug...Great work, although I expect - as the authors suggest - that manipulation of hormone levels is probably the strongest effect of removing the ovaries. <br /><br />This is probably the cause of the authors' observations, rather than the relief of the 'tremendous burden of reproduction.' <br /><br />Just speculation, of course :)Bryan Kolaczkowskihttps://www.blogger.com/profile/00436465500267416742noreply@blogger.com