tag:blogger.com,1999:blog-3653345901774701895.post6088740936382464525..comments2024-03-23T12:02:36.626-07:00Comments on Mark P. Witton's Blog: Book news for Easter: more from Daisy and the Isle of Wight Dragon, and exciting plans for PterosaursMark Wittonhttp://www.blogger.com/profile/02524696111911168322noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-3653345901774701895.post-23416926547131303482013-04-02T05:37:31.734-07:002013-04-02T05:37:31.734-07:00Bird eggs lose a little mass through water evapora...Bird eggs lose a little mass through water evaporation, but not much - around 10% or so, but it's variable between species. I'm pretty sure that no bird eggs increase in mass, though. Mark Wittonhttps://www.blogger.com/profile/02524696111911168322noreply@blogger.comtag:blogger.com,1999:blog-3653345901774701895.post-25293273120702546922013-04-02T02:23:36.386-07:002013-04-02T02:23:36.386-07:00Huh! Live and learn!
So birds' eggs don't...Huh! Live and learn!<br /><br />So birds' eggs don't do this?<br />Mike Taylorhttps://www.blogger.com/profile/06039663158335543317noreply@blogger.comtag:blogger.com,1999:blog-3653345901774701895.post-34821567810927378232013-04-02T01:17:59.141-07:002013-04-02T01:17:59.141-07:00Yup. Because pterosaur eggs had soft, thin shells,...Yup. Because pterosaur eggs had soft, thin shells, they could probably take up water from their surroundings rather than relying on an on-board water store, à la dinosaur eggs. The result, as you may expect, is a considerable increase in egg mass post oviposition. The calculations here are derived from mass models for modern squamate eggs.Mark Wittonhttps://www.blogger.com/profile/02524696111911168322noreply@blogger.comtag:blogger.com,1999:blog-3653345901774701895.post-51064053152319940442013-04-01T12:54:26.659-07:002013-04-01T12:54:26.659-07:00Wait. "... which translates to a freshly-laid...Wait. "... which translates to a freshly-laid egg mass of 10 g, an egg mass of 16.25 g at the end of the incubation period."<br /><br />You're saying that eggs increase their mass by 62.5% after laying?!<br />Mike Taylorhttps://www.blogger.com/profile/06039663158335543317noreply@blogger.com