tag:blogger.com,1999:blog-3462224469938183303.post4381085044739926896..comments2023-10-22T08:06:07.451-07:00Comments on The Purple Empire: Differing forms in Apatura iliaDerek Longhursthttp://www.blogger.com/profile/03669210989794244490noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-3462224469938183303.post-986975246680499272015-07-08T22:44:09.335-07:002015-07-08T22:44:09.335-07:00Many thanks, yes it does. I somehow thought it cou...Many thanks, yes it does. I somehow thought it couldn't just be one or the other. I guess <i>Araschnia levana</i> has mastered the trick most effectively, with totally different spring and summer forms.Derek Longhursthttps://www.blogger.com/profile/03669210989794244490noreply@blogger.comtag:blogger.com,1999:blog-3462224469938183303.post-17180251073514953292015-07-08T09:29:17.792-07:002015-07-08T09:29:17.792-07:00Derek. No genetics is not the only determining fa...Derek. No genetics is not the only determining factor. Spring and summer broods of the same A.ilia ssp (see Akio Masui's book) very often posses differing colourations. In essence summer broods posses significantly more orange (more clytie) than the spring (more ilia) specimens. This subject matter is touching on parts of my research work. My current evidence currently points to one of two possible explanations. Differing lighting conditions (between the months) significantly effects the perception of essential visual mating signals. Specimens therefore increase their chances of mating by increasing the contrast against their environment. For references please take a look at Thery (2001) "Forest Light and its influence on Habitat Selection" and also Shashar (1998) "Polarization of Light in a Tropical Rain Forest". The other explanation is due to the regulation of temperature effecting the release of essential wing compounds. I hope this helps?irisscientisthttps://www.blogger.com/profile/08157165194083135872noreply@blogger.com