![]() | ||
| Quick Links | Announcements | | Enter Chat Room | | Today's active topics | Follow @paranormalborde |
TPB's YouTube Channel ~ Click to Register The Vampire Lair on Facebook and MonsterVisionTV on Facebook |
|
|
|
||
| We hope you enjoy your visit. You're currently viewing our forum as a guest. This means you are limited to certain areas of the board and there are some features you can't use. If you join our community, you'll be able to access member-only sections, and use many member-only features such as customizing your profile, sending personal messages, and voting in polls. Registration is simple, fast, and completely free. Join our community! If you're already a member please log in to your account to access all of our features: |
| Vampire Moth Discovered; Evolution at work | |
|---|---|
| Tweet Topic Started: Oct 28 2008, 05:05 AM (1,254 Views) | |
| Mystical | Oct 28 2008, 05:05 AM Post #1 |
![]()
|
Vampire Moth Discovered -- Evolution at WorkJohn Roach for National Geographic News October 27, 2008 A previously unknown population of vampire moths has been found in Siberia. And in a twist worthy of a Halloween horror movie, entomologists say the bloodsuckers may have evolved from a purely fruit-eating species. VIDEO: Vampire Moths Discovered (October 27, 2008) Only slight variations in wing patterns distinguish the Russian population from a widely distributed moth species, Calyptra thalictri, in central and southern Europe known to feed only on fruit. When the Russian moths were experimentally offered human hands this summer, the insects drilled their hook-and-barb-lined tongues under the skin and sucked blood. Entomologist Jennifer Zaspel at the University of Florida in Gainesville said the discovery suggests the moth population could be on an "evolutionary trajectory" away from other C. thalictri populations. In January, she will compare the Russian population's DNA to that of other populations and other species to confirm her suspicions. "Based on geography, based on behavior, and based on a phenotypic variation we saw in the wing pattern, we can speculate that this represents something different, something new," Zaspel said. "But it is really difficult to say without knowing genetic differences between individuals in that population, and among individuals from other populations, how different this group is going to be." (Zaspel's research is funded in part by a grant from the National Geographic Society's Committee for Research and Exploration. National Geographic owns National Geographic News.) Blood Feeding If it turns out that Zaspel has indeed caught a fruit-eating moth evolving blood-feeding behavior, it could provide clues as to how some moths develop a taste for blood. (Related: "Vampire Bats Hunt by Sound of Victims' Breath" [June 19, 2006].) Some researchers, she noted, hypothesize that blood-feeding in insects and animals evolved from behaviors such as feeding on tears, dung, and pus-filled wounds. "We see a progression from nectar feeding and licking or lapping at fruit juices to different kinds of piercing behaviors of fruits and then finally culminating in this skin piercing and blood-feeding," she said. Chris Nice, a biologist who studies butterfly evolution at Texas State University in San Marcos, said few butterfly and moth species are equipped with the hook-and-barb-lined tongues needed to pierce fruit. "The fruit-piercing stage in the first place sets the stage, in a morphological sense, for further transitions into, in this case, the blood-feeding," he said. Nice added that genetic research such as Zaspel's is the only way to test ideas on how certain behaviors evolve. Sexual Gift? The next question is why this Russian population of C. thalictri appears to have evolved blood-feeding behavior, Zaspel said. Only male moths exhibit blood-feeding, she noted, raising the possibility that as in some species of butterflies and other moths, the Russian moths do it to pass on salt to females during copulation. "There is no evidence it prolongs the life of the male, or anything like that," she said. "So we suspect that it is probably going to the female." The sexual gift, she said, would provide a nutritional boost to young larvae that feed on leaf-rich, but sodium-poor, diets. If salt is otherwise limited in the environment the sexual gift theory "would make sense," Nice added. http://news.nationalgeographic.com/news/2008/10/081027-vampire-moth-evolution-halloween-missions.html |
|
|
|
| StrmySummer | Oct 28 2008, 03:52 PM Post #2 |
![]()
Storm Goddess
![]()
|
hmm.....interesting.....sorta like a mosquito. the one on the guys mouth....ick! that's just disgusting! i wonder if it leaves a welp like a mosquito bite?
|
![]() "Beginning now, let's play more, kiss more, love more, let's be so close that when one of us cries, the other tastes salt." | |
|
|
|
| 1 user reading this topic (1 Guest and 0 Anonymous) | |
| « Previous Topic · Nature's Wonders · Next Topic » |







2:21 AM Jul 11