next message in archive
next message in thread
previous message in archive
previous message in thread
Index of Subjects
Index of Subjects Hi, Only the abstract of the University of Chicago article about Monarchs is free. However, Andy Davis at the University of Georgia has a Blog describing the reasearch. See his June 24 Blog on his website http://monarchscience.org . I would recommend reading many of his other blogs about Monarch Science. (There are several about Nova Scotia there) There has been some reservations about the rearing of Monarchs being of value to migrations for several years now. This article emphasizes that commercial Monarchs are different. I think there has to be a more definitive experiments about the eclosing indoors effecting the migration pattern of the Monarch. In the experiment, they placed the pupae in an incubator. Alison and I rear our Monarchs on the plants where we found them and let them wander at will, and only restricting them when they reach 5th instar. Our enclosure is large and near large windows with natural light. This year we are bringing fewer inside and flagging chysalis in the field and monitoring them. A large fraction of them get into trouble from predation and attaching to things like grass and dead leaves that fall off plants. In those cases we rescue and allow them to eclose inside by attaching them to study supports. At the moment we have nearly 50 chrysalis flagged in the field and have released over 50 reared inside. We have at least over 50 in caterpillar stages. We saw a greater return of Monarch butterflies this year although the were late due to the cool June. The Monarchs are a couple weeks behind where they were last year and there will not be two generations reared this year. I will give a more completer report later. Regards, Larry -- Larry Bogan <larry@bogan.ca> Brooklyn Corner, Nova Scotia ////////////////////////// On Fri, 23 Aug 2019 20:55:37 -0300 Lois Codling <loiscodling@hfx.eastlink.ca> wrote: > > Larry and others will be interested in this study. If you look at the > link, the article is near the bottom of the page. > > Lois Codling > > > Monarch migration aggravation > <https://world.wng.org/content/time_to_get_over_darwin/#monarchs> > > Soon the monarch butterflies of North America will begin their annual > fall migration to the warmer climates of California or Mexico, where > they will winter until their return next spring. Over the past two > decades, the number of North American monarchs has dwindled by 90 > percent. To boost their numbers, hobbyists raise large numbers of > monarchs, and commercial breeders sell them for school children to > release. But a study <https://www.pnas.org/content/116/29/14671> > published July 16 in the /Proceedings of the National Academy of > Sciences/, showed that captive breeding disrupts monarchs’ migratory ......
next message in archive
next message in thread
previous message in archive
previous message in thread
Index of Subjects