Pollution, Food Stress Take Toll On Bald Eagles
...re territorial-- adults will vigorously chase away intruders -- some nesting pairs get stuckwith the poorer fishing areas. Exactly how contaminants are getting into the Crofton eagle chicks isnot known, says Gill, although fish seem the obvious source. More research isplanned for this summer. In the me...Heat-Shock Vaccine Stops Bacteria Dead
...echanism for abeneficial cause -- fighting outside intruders such as bacteria. This new approach may lead to the development ofimproved vaccines for preventing various infectious diseases and possibly for treating cancerous tumors. The emergence of drug-resistant bacteria and the growing concern over theappear...CU Research Team Unravels Mystery Of Larceny Among Tropical Ant Species
...ould-be intruders, E. ruidum guards simply wrestle intruders away from the nest entrance and set them down. But... the interlopers, ensuring successful nest entryby intruders on their next attempt. "If the guard ants killed the intruders, this system of larceny wouldcome to...Brain compound's anti-aggression effects appear to reverse in monogamous male rodents
...experiencea dramatic increase in aggression toward intruders after mating." For the new study, Gammie and co-author <ahref="http://www.psy.jhu.edu/~nelson/">Randy Nelson , a Hopkins professor ofpsychology and neuroscience, exposed mated and non-mated male voles and femalevoles with pups to intruders, a...Little-known substance regulates inflammatory response
...el the assailants. Immune system cells attack the intruders directly while releasing chemical signals to call in additional troops. One of those signals is a substance known as tumor necrosis factor, or TNF. TNF not only initiates a cascade of other chemical messengers but also increases blood-vessel perme...Study looks at causes, consequences of sex differences
...ce are more aggressive toward other females and to intruders than 2F females. "Theres growing evidence to suggest that humans may be influenced by prenatal hormone exposure, perhaps not as dramatically as animals because most humans are born as singletons," Vandenbergh said. Human studies of fraternal twins ha...Caterpillars make noise to fend off intruders, researchers discover
...umming up vibrations with their mandibles to drive intruders away, scientists say. At times, the nest-owner an...extended confrontations that frequently ended with intruders damaging the residents nests by biting through the silk strands. In follow-up tests, displaced resid...Researchers developing technology to outsmart metastasized cancers
... killer (NK) cells and macrophages were alerted to intruders and eliminated the cancer along with them." To retarget the immune system, scientists first inoculated mice to raise antibodies against a hapten (a small, inert organic chemical) called fluorescein. Once high levels of the antibodies were circulating...Slightly stressed carp succumb easily to parasite
...ces so much that the cells which must clear up the intruders are weakened. The parasite can then reproduce unhindered. The vast majority of carp, more than 90% of the world production, are reared in China. That is also where the majority are consumed. The Dutch are less enthusiastic about carp, in part because...Facial markings help paper wasps identify each other
...mates were able to distinguish between friends and intruders and then to associate the painted markings with rank. With this recognition, aggression declined. "Basically the wasp sees a painted wasp with altered markings and thinks, 'She smells right, so she must be a nest mate, but if I don't recognize her, i...Researchers discover anxiety and aggression gene in mice
...g its territory. The Pet-1 knockout mice attacked intruders much more quickly and more often than wild type mice. In fact, knockout mice often would not engage in normal exploratory behavior directed toward the intruder before attacking it. Excessive anxiety-like behavior was evident in another test, measuri...Receptor could be target for cancer therapy
..., Breyer said. Dendritic cells police the body for intruders (like tumor cells) and "present" tumor cell proteins to T cells, stimulating them to become killer T cells that can seek out and destroy the infringing tumor cells. The investigators showed that EP2 knockout mice, but not wild-type mice, produce the...Flipper as Rambo: Dolphins can be great naval security tools
... lions have also been trained to locate suspicious intruders and can even snap a lock or clamp on a human leg and then swim away. The clamp is connected to a buoy or rope that signals Navy personnel on the surface that a potential terrorist has been detected. Davis, who has attached cameras to seals that dive...UF study: World shark attacks sink again, may signal long-term trend
...r the sea, it's a wilderness experience, and we're intruders in that environment." Last year's total of 55 unprovoked attacks worldwide dropped nearly 13 percent from the 63 reported in 2002, and was down considerably from the 68 in 2001 and the all-time record of 79 in 2000, said Burgess, who oversees the fi...Lake research offers clues to managing crayfish invasions
...ely altering fish populations. For example, these intruders eat fish eggs, displace animals native to the waters and "mow down" aquatic plants - a source of food and shelter for fish, says Brian Roth, a graduate student at UW-Madison's Center for Limnology and a presenter at the meeting. "They have really dra......f proteins (also known as "antigens") from foreign intruders such as bacteria, or, in the case of transplantation, proteins from other people. The job of the APCs -- which exist in all body tissues -- is to notify the immune system of the foreign tissue, pick up that tissue and then travel through vessels kno...