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Tag: "aquatic" at biology news

Anti-bacterial additive widespread in U.S. waterways

...example, has an estimated half lifeof 1.5 years in aquatic sediments. Do the potential benefits ofantimicrobial products outweigh their known environmental and humanhealth risks? This is a scientifically complex question consumers,knowingly or unknowingly, answer to everyday in the checkout line ofthe grocer...

Researchers reveal the infectious impact of salmon farms on wild salmon

...ed farms, open cages of closely packed salmon, are aquatic feedlots providing the ideal conditions for the breeding and spread of sea lice amongst the adult fish. For the migrating wild salmon, the farm is a concentrated point source of infectious lice larvae. "We found lice levels exceeded what we would fi...

Elephants imitate truck noises, other animals

...llow a pattern we've seen in other terrestrial and aquatic species capable of vocal learning, "Tyack said. "Vocal learning should also occur in other species where long-lived social bonds are based on individual relationships and where members of a group separate and reunite over time." The study was funded...

Elephants imitate sounds as a form of social communication

...llow a pattern we've seen in other terrestrial and aquatic species capable of vocal learning, "Tyack said. "Vocal learning should also occur in other species where long-lived social bonds are based on individual relationships and where members of a group separate and reunite over time." ...

South America's vast pantanal wetland may become next everglades, UNU experts warn

... fires which destroy flood-adapted trees, in which aquatic birds nest, while killing swamp deer and other animals. (The Pantanal's other fauna includes giant anteaters, armadillos, capybara, the Brazilian tapir and jaguar, and endangered species like the howler and capuchin monkeys, caiman, and giant black e...

How the environment could be damaging men's reproductive health

...the west coast. Prof Giwercman explained: "Closed aquatic ecosystems, such as the Baltic Sea, have become heavily polluted by POPs. In spite of decreases since the 1970s, this contamination has resulted in higher levels of POPs in humans, such as fishermen, who consume large quantities of local fatty fish."...

Alaskan puzzles, monitoring provide insight about North Pacific salmon runs

...t to harvesting, says Ray Hilborn, UW professor of aquatic and fishery sciences. "The Kvichak sounds a lot like Columbia River or Puget Sound stocks," he says. Still, 20 miles away from the Kvichak are similar lakes and rivers with record production. "Our research is directed toward understanding why thes...

Low level of extinction during ice age linked to adaptability

...e Paleozoic Era. The likely answer: because those aquatic life forms that did survive during this era were singularly equipped to endure severe fluctuations in temperature and sea levels. Those that were not died in a mass extinction that heralded the ice age's onset. "These results not only clue us in to ...

Reservoirs may accelerate the spread of invasive aquatic species, researchers say

... contributing to the accelerating spread of exotic aquatic species, according to a Forum article in the June 2005 issue of BioScience. John A. Havel of Southwest Missouri State University and Carol Eunmi Lee and M. Jake Vander Zanden of the University of Wisconsin survey evidence indicating that the physical...

Study reveals new technique for fingerprinting environmental samples

...e signatures of the genes alone in terrestrial and aquatic samples can accurately diagnose the health of the sampled environments. This study, published in the April 22nd edition of the journal Science positions large-scale genome sequencing to accelerate advances in environmental sciences akin to the contri...

Scientists journey to southern Africa to unravel the secret world of elephant communication

...ashing, spraying and performing a variety of other aquatic antics. Suddenly, and for no apparent reason, the four males step away from the water and freeze in unison, as if posing for a group action shot. O'Connell-Rodwell is particularly intrigued by one bull known as Billy Idol, easily recognizable by the...

To sea or not to sea: When it comes to salmon sex, size sometimes doesn't matter

...as P. Quinn, University of Washington professor of aquatic and fishery sciences and author of a recently released book, "The Behavior and Ecology of Pacific Salmon and Trout." Just picture that tiny male under the belly of a 20-pound adult female that's returned to spawn, Quinn says. He's almost as likely t...

DOE JGI launches IMG public online microbial genome data clearinghouse

...d microbial communities, model system vertebrates, aquatic organisms, and plants. Established in 1997, DOE JGI now unites the expertise of four national laboratories, Lawrence Berkeley, Lawrence Livermore, Los Alamos, and Oak Ridge, along with the Stanford Human Genome Center to advance the frontiers of geno...

Discovery of an American salamander where it shouldn't be: Korea

...ish Columbia, Wake said, and it split off from the aquatic salamanders common in Korea at least 175 million years ago. "In the past, we have seen this one group that occurs in Sardinia and Italy as being somehow a special case, an enigmatic case," he said. "Now all of a sudden, we realize that if they're in...

Green catalyst destroys pesticides and munitions toxins, finds Carnegie Mellon University

... priority pollutants by the EPA, they are toxic to aquatic life. They produce immediate toxic effects to the nervous system, and some reports have implicated them as possible endocrine disruptors. Many of these compounds cannot be destroyed by existing means. The catalyst, one of a family of catalysts calle...

Researchers Discover That Microbes Can Produce Miniature Electrical Wires

...ces. The tiny organisms, widely found in soils and aquatic sediments, have demonstrated promise as cleaners of toxic spills and generators of energy. They are anaerobic bacteria (living without oxygen) that use metals to gain energy the way humans and other organisms use oxygen. They are distributed througho...

Study shows eutrophic lakes may not recover for a millennium

... bit of the nutrient is all that is needed to send aquatic ecosystems into overdrive. Carpenter's model also shows that, unchecked, phosphorus pollution could put Lake Mendota on a fast track to extreme degradation. "There is a potential shift to an extremely degraded state that could occur even if we shut ...

Toxic flood lifts lid on common urban pollution problem

...icals are particularly dangerous to fish and other aquatic life because they reduce the levels of oxygen in the water, impinging on its ability to support life. Particulates cloud water, reducing sunlight penetration and plant growth. Once they cross a certain threshold, organic chemicals and metals also can...

Acid water in East Java threatens biodiversity and local welfare

...rved that the neutral river water contained normal aquatic fauna, but that only mosquito larvae could survive the extremely acidic water. The diversity of microorganisms and algae was also very low. The inhibited breakdown of organic material was another ecological effect measured. Lohr established this usin...

Aquatic plants may hold key to advancing plant disease management

The way aquatic plants respond to plant disease and climate change... Schmale III, Cornell University, Ithaca, NY, many aquatic plants possess unique mechanisms of resistance to microbial attack. "Through further study, plant pa...

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