Tag: "waters" at biology news

'Dead zone' area shrinking, Texas A&M prof says

...d that the hypoxia had moved offshore from shallow waters to much deeper waters in the Gulf," DiMarco explains. "In other words, much of the dead zone had broken up, and this very ...

A long-necked sea predator from China described in Science

...t a fish or other aquatic prey in murky near-shore waters before the predator's full profile scared off the potential meal. Based on Dinocephalosaurus' tooth and fang arrangement which is unlike other protorosaurs, the creature could have attacked with jaws opening sideways like a crocodile. Coauthor Micha...

UAF scientists discover new marine habitat in Alaska

...ans, including in the Arctic near Greenland and in waters off British Columbia, Canada. But they have never been documented in Alaska waters. "This is exciting because it represents a new type of habitat scientists had not identified before in Alaska," said Brenda Konar, associate professor of marine bio...

Hardy buoys: Texas A&M project predicts oil spill movements

...ent-per-barrel tax on all oil transported in Texas waters helps support most of the costs, Guinasso says. The TABS project was put to the test in 1996 shortly after the first buoys were positioned in the Gulf of Mexico. In March of that year, the Buffalo Barge 292 started spilling oil into the Houston Ship ...

Sugar-coated sea urchin eggs could have sweet implications for human fertility

...brids turning up. But in other places, such as the waters off the West Coast of North America, the species breed at the same time and occupy the same waters, and still hybrids are rare. The purple sea urchin has been the most closely studied of the urchins and for years has served as the reproduction model...

Blue marlin in gulf have high mercury levels, A&M study shows

...e team has found several species captured in Texas waters have higher mercury levels than those closer to Louisiana. "This appears to be a source issue," Rooker believes. "But this is something we need to examine more closely." He says sport fishermen who have caught marlin should not be overly alarmed, bu...

Unicellular organisms contribute more nitrogen to ocean that reported earlier

.... Their measurements already taken in the marginal waters of the South Pacific off the coast of northern Australia yielded the highest recorded rates of nitrogen fixation by unicells to date. There are still numerous regions of nutrient-poor oceans typically off the continental shelves from the equator ...

Anti-bacterial additive found in Maryland streams

...pb. The highest detected concentrations in surface waters of the Greater Baltimore area were 20 fold higher than previously reported levels, which are currently used by the United States Environmental Protection Agency for evaluation of the ecological and human health risks of triclocarban. The antimicrobia...

New hypoxic event found off Oregon coast

...to shore. And in this situation, the high nutrient waters support even more growth than usual of microscopic marine plants, which ultimately sink and decay, leading to consumption of even more of the remaining oxygen in the water. "Hypoxic conditions such as this have been documented in other nearshore upwe...

Goals unlikely to protect Gulf of Mexico shrimp industry

...runoff causes algae blooms, which sink into bottom waters and are decomposed by bacteria, a process that con...pid growth of oxygen-starved zones in some coastal waters as an emerging global issue. ...

Lake research offers clues to managing crayfish invasions

...ders 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 dramatic and traumatic effects on the ecosystem." To dat...

Whale carcass yields bone-devouring worms

..., the organic debris that drifts down from surface waters to sustain life in the deep. Whale-fall specialist Craig Smith of the University of Hawaii has identified entire ecosystems with hundreds of different animals that have developed around a single whale fall. Some of these communities may be sustained ...

AGU journal highlights - 29 July 2004

...ol the movement and transfer of dense, cold bottom waters that move tothe ocean floor and are subsequently r...new study found that the noise islouder in shallow waters than originally thought. Tolstoy et al. report that the soundpressure from compressed-air pulses use...

Ocean scientists assess impact of seismic pulses in effort to protect whales

...al Protection Act in 1972, ships operating in U.S. waters must adhere to increasingly strict guidelines, in order to minimize impacts on whales and other animals. This includes the gradual ramping up of a seismic array over 30 to 60 minutes, to warn whales and give them time to leave the area. The National ...

Antimalarial substances found in New Caledonian sponges

...aploscleridae) collected in shallow New Caledonian waters during campaigns of the programme "Marine Substances of Biological Interest" (SMIB), have proved to contain particular organic compounds, the phloeodictines, alkaloids with powerful antibacterial properties (2) . Up to now, only deep-water species o...

Research shows oceans are becoming more acidic

... changes in the CO 2 system in open-ocean surface waters have not been observed for more than 20 million ye...es. In addition nutrient concentrations in surface waters of high-latitude regions would be lower, subsurface waters would be less oxygenated, and phytoplankt...

Scientists find 75 percent of red snapper sold in stores is really some other species

...per, or Lutjanus campechanus, is found in offshore waters around coral reefs and rocky outcroppings and is one of the most economically important fisheries in the Gulf of Mexico, with greater total landingsthan any other snapper species," Marko and colleagues wrote. "In 1996, the Gulf of Mexico Fishery Mana...

Water study yields a few surprises for New England

...delines, but were still frequently found in ground waters used for drinking. Major Findings on River Qu...re in urban settings, the fish surveyed from urban waters contained less mercury. Surprisingly, fish found in streams draining more forested and wetland-rich ...

Releasing pet fish into the wrong ocean proves a diaster

...his highly venomous fish has recently been seen in waters from North Carolina to New York. In their native habitat, lionfish prey on a wide variety of fish, shrimps and crabs. "Introduction of the lionfish is an ecological quantum leap for local fishes that have no experience dealing with this voracious pre...

Melting ice cap gives urgency to new census of marine life project in Arctic Ocean

...ths of the Canada Basin do not travel to shallower waters and are thought to have been there isolated for mi...d's least-known ocean, its permanently ice-covered waters more isolated than those at the edges of the Antarctic continent. Because it is so isolated, scient...

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