A 'private bandwidth' for communication in bats: Evidence from insular horseshoe bats
... bats find their way in the dark and detect insect prey by emitting long ultrasound calls mainly made of a constant frequency. Different rhinolophid species show different frequency values. It has been proposed that such differences are large enough to allow recognition of conspecifics. The study prove...Secret life of elephant seals not secret anymore!
... the seals interact with their environment and the prey within it. By monitoring changes in the rate at which seals drift up or down during passive drift dives, the scientists could determine where the seals were gaining fat (and becoming more buoyant) and where food was harder to find and the animals l...Genetic analysis finds greater threat in frog-killing fungus
...acting other organisms. Garter snakes that used to prey on these frogs are now declining. The frog's decline is leading to an unraveling of a high-elevation ecosystem."...Presence of wolves allows aspen recovery in Yellowstone
... shown, have the ability to strike fear into their prey and significantly change their behavior as a result. The recovery of aspen, the researchers said, appears to have no link to climate or local terrain, since unbrowsed aspen in upland sites are growing just about as much as those in riparian zones. ......, their adaptable hunting strategies allow them to prey upon commercially important fishery species like hake and anchovy." In fact, Robison's survey data showed that within a month after populations of Humboldt squid increased in Monterey Bay, the number of hake dropped dramatically. The Humboldt squid...What determines the speed at which birds fly?
...milar characteristic speeds. For example, birds of prey and herons had slow flight speeds, on average, given their mass and wing loading, whereas the average speed for songbirds and shorebirds was faster than would be predicted. This study suggests that there are different functional adaptations affecti...Longest study finds reef fish need longer break
...stem depends. When fishing eliminates species that prey on sea urchins, the invertebrates can severely impact the entire system, so keeping sea urchins in check is vital to coral reefs. Overall, the time frame needed by surgeonfish and tangs, triggerfish, rabbitfish, and the coral-building algae to comp...Research ends debate over benefits of butterfly defenses
...he behaviour of Great-tits foraging for artificial prey to understand more clearly how a species evolves t...ehaviour of Great-tits as they attacked artificial prey made from almond filled paper parcels. Hannah added: We coated some of the almonds in a non-toxi...Wolves of Alaska became extinct 12,000 years ago, scientists report
...uently when they ate, crunching the bones of their prey much more often than their modern counterparts. Wh...en because it was difficult to catch and hold onto prey when there was much competition and theft among carnivores, forcing them to eat quickly, said Van Va...The fisherman is a predator like any other
... motives or attachment to aport, did not produce a prey search strategyradically different from that of animalpredators. Whether human or not, top predatorsof marine ecosystems must confronta degree of uncertainty as to the location oftheir prey. They therefore develop searchstrategies that enable them to...Specialized, bone-crushing wolves of Alaska disappeared long ago
... strong jaws, and massive canine teeth for killing prey larger than themselves and regularly consuming large bones, according to the researchers. Our results are surprising as the unique attributes of Alaskan Pleistocene wolves had not been previously recognized and show that wolves suffered an extincti...Ice Age extinction claimed highly carnivorous Alaskan wolves
... bones are intermediate between those of potential prey speciesmammoth, bison, musk ox and caribousuggesti... the story is perhaps less complicated. When their prey disappeared, these wolves did as well, Leonard said. But the results of this study also imply that t...Prey not hard-wired to fear predators
...ntist Dr. Joel Berger, who says that several large prey species, including moose, caribou and elk, only fe... as the goal of re-instilling fear of predators in prey species has been successful, the question remains whether enough wolves will be left to maintain the...Fruit bats are not 'blind as a bat'
... open treetops, where they are exposed to birds of prey (Fig. 2). Here, a visual 'early warning' helps survival. "Furthermore, flying foxes don't sleep all day; they often change their positions in the tree and interact with their neighbours. Young flying foxes also make training flights during the day. A...Study shows lizard moms dress their children for success
...tors (the optical effect of stripes on fast-moving prey makes them hard to catch). But the genes that control behavior and back pattern are not linked, so a lizard could end up with a mismatch that would leave it highly vulnerable to predators--wearing stripes and trying to hide in the grass, for examp...The fisherman is a predator like any other
...motives or attachment to a port, did not produce a prey search strategy radically different from that of a...ts to a minimum. This convergence found between prey search by fishermen and natural predators could change our general perception of human activity in m...Want to save polar bears? Follow the ice
... vital habitat for polar bears and seals that they prey onwill remain into the near future. "The polar ...ignating protected areas for polar bears and their prey species." The first step of the new program will entail a workshop involving scientists, polar be...Ants show us how to make super-highways
...back to the nest, making a flatter surface so that prey can be delivered to the developing young at maximu...raffic and results in an increase in the amount of prey delivered to the nest each day. Professor Franks said: "I think every road user who has ever inwar...Genome of Clostridium botulinum reveals the background to world's deadliest toxin
...ontrol tremors and in cosmetic treatments. For the prey of its opportunistic attacks, death is swift. Perhaps the most important tool it has to act out its stealth attacks is its ability to hibernate when times are hard by forming dormant spores. More than 110 of its set of almost 3700 genes are used t......ontrol tremors and in cosmetic treatments. For the prey of its opportunistic attacks, death is swift. Perhaps the most important tool it has to act out its stealth attacks is its ability to hibernate when times are hard by forming dormant spores. More than 110 of its set of almost 3700 genes are used t...