Tag: "predatory" at biology news

Beavers helping frogs, toads survive

...rvae. As well, the ponds may be less hospitable to predatory fish because the dams are often located on small streams where winterkill conditions are common, the study suggests. The findings could benefit amphibian conservation efforts for forestry and energy industries, by making room for beaver dams in th...

Scientists crack the genome of the parasite causing trichomoniasis

...g the area it is infecting. Trichomonas also shows predatory behavior. It phagocytoses, or eats up, good bacteria in the vagina. That makes the vagina more alkaline and more hospitable toward Trichomonas and other pathogens. When infecting women, the pathogen latches onto vaginal tissue and forms tendrils th...

UCLA and NYU microbiologists crack genome of a parasite that causes a common STD

... the area it is infecting. The organism also shows predatory behavior. It "eats up" good bacteria in the vagina using a process called phagocytosis. This makes the vagina more alkaline and more hospitable toward Trichomonas and other pathogens. This little bug presented a sizable genomics challenge. "The ...

To trust or not to trust your friends

...aze to obtain food in the presence or absence of a predatory brown trout. Then a nave minnow joined the group on later trials either in the presence or absence of the trout. Nave fish without the predator were only half as successful in finding the food when their group of mates had been pre-trained with the p...

Plant-grazing fish boost resilience of coral reefs facing stress

...two different conditions: the presence of abundant predatory and herbivorous (plant- and algae-eating) fish, an...erimental cages experienced the depletion of large predatory and herbivorous fish. The researchers found that the two groups of coral underwent very different co...

Bats prey on nocturnally migrating songbirds

... as other European bat species. The extraordinary predatory specialization of the giant noctule may be shared by the few other big aerial-hawking bat species which exist elsewhere in the world. Are some of them similarly stalking unwary songbirds during their massive nocturnal passes? The foraging habits of t...

Marine moss reveals clues to anticancer compound

...t makes the poppy seed-sized larvae distasteful to predatory fish. But that molecule, known as a bryostatin, also confounds a variety of cancer cell lines. "The larvae are covered with a skin of bryostatins," said Haygood, whose research was described recently in the Journal of Natural Products. "They need t...

Alien predators are more dangerous than native predators

..., Australias unique marsupial fauna have never had predatory species like feral foxes and cats until recently. Such alien predators were shown to have worse negative impacts than some classic predators, including large carnivores such as wolves. Case study: foxes and the brush-tailed bettong In the early...

Overfishing great sharks wiped out North Carolina bay scallop fishery

...nd that overfishing in the Atlantic of the largest predatory sharks, such as the bull, great white, dusky and hammerhead sharks, has led to an explosion of their ray, skate and small shark prey species. "With fewer sharks around, the species they prey upon like cownose rays have increased in numbers, and i...

Overfishing large sharks impacts entire marine ecosystem, shrinks shellfish supply

...University, has found that overfishing the largest predatory sharks, such as the bull, great white, dusky, and hammerhead sharks, along the Atlantic Coast of the United States has led to an explosion of their ray, skate, and small shark prey species. "With fewer sharks around, the species they prey upon li...

UF scientists discover new genus of frogmouth bird in Solomon Islands

... is housed at the Florida Museum. Frogmouths are predatory birds named for their strikingly wide, strong beak that resembles a frogs mouth; but their beak also sports a small, sharp hook more like an owls. Steadman said their beaks are like no other birds in the world. They eat insects, rodents, small birds ...

Scientists report new take on sexual signaling

...chores) segue in and out of their burrows, dodging predatory shorebirds. Male crabs build hood-like sand castle...rectly and avoid their predators. "When we bait predatory birds into the areaartificially increasing the risk of predation, females show an even greater prefe...

Ants show us how to make super-highways

...s of Central and South America conduct spectacular predatory raids containing up to 200,000 foraging ants. Remarkably, some ants use their bodies to plug potholes in the trail leading back to the nest, making a flatter surface so that prey can be delivered to the developing young at maximum speed. The raid a...

Glimmer of hope for Tahitian tree snails' survival

...n of the carnivorous rosy wolf snail, he said. The predatory intruder was meant to control yet another snail, the giant African land snail, which was presumably brought to the island as a potential food source. It instead became something of an agricultural pest, and the rosy wolf snail was brought in. As a co...

Biocontrol of invasive water hyacinth contributes to socioeconomic and health improvements in Africa

... These farmers practiced conservation and use of a predatory ant, Lepisiota sp., to control cotton bollworms, a...some hazards. The risks of introducing non-native predatory species must be carefully evaluated before they are introduced. These risks include invasiveness by...

Humboldt squid on the move

Over the last five years, large, predatory Humboldt squid moved north from equatorial waters and invaded the sea off Central California, where they may be decimating populations of Pacific hake, an important commercial fish. Ironically, these squid may have benefited from the decline of large...

Genetic analysis finds greater threat in frog-killing fungus

... been attributed to the introduction of non-native predatory fish in some areas and to chytridiomycosis, a quickly spreading disease caused by this waterborne fungus, Batrachochytrium dendrobatidis. The study, to appear in next week's edition of the journal Proceedings of the National Academy of Sciences, su...

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(Date:8/19/2014)... release is available in German . ... inherently intermittent energy sources. If a large amount of electricity ... future, excess energy will have to be stored during productive ... existing storage capacities are far from adequate for the purpose. ... One important focus lies on battery systems that used to ...
(Date:8/19/2014)... a lemur. It,s not an African Bush Baby or even ... and downright "cool" primate from Southeast Asia. , "It,s really ... Rafe Brown, curator-in-charge at the University of Kansas, Biodiversity Institute. ... furry body; a long tail with a furry tuft at ... look a bit like the disks on the digits of ...
(Date:8/19/2014)... retail seafood counters in 10 different states show ... to unexpectedly high levels of mercury, a harmful ... fish of the same species, but from a ... according to new research by University of Hawai,i ... is essential to allow consumers to choose sustainable ...
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