Daily non-political popular news in brief.
Iron in Northwest rivers fuels phytoplankton, fish populations
02-28-2007 · EurekAlert!A new study suggests that the iron-rich winter runoff from Pacific Northwest streams and rivers, combined with the wide continental shelf, form a potent mechanism for fertilizing the nearshore Pacific Ocean, leading to robust phytoplankton production and fisheries.
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Keywords: iron, northwest, rivers, fuels, phytoplankton, fish, populations, river, fuel, population
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- Ice Ages and rivers may have affected gorilla diversification
12-10-2007 · EurekAlert!
Geography and historical climate change may have both played a major role in gorilla evolutionary diversification, according to a new genetic study by Cardiff University and the University of New Orleans.The collaborative School of Biosciences study shows that the genetic composition of gorilla populations varies across different parts of their current geographic range and that this variation may be tied to Ice Age climate change and river barriers.
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- Census of Marine Life historians detail collapse of bluefin tuna population off northern Europe
08-05-2007 · EurekAlert!
Census of Marine Life researchers have chronicled the decimation of North Atlantic bluefin tuna populations in the first half of 20th century. Meanwhile, the latest results of modern electronic fish tagging efforts off Ireland and in the Gulf of Mexico reveal remarkable migrations and life-cycle secrets of this declining species.
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- Killing only a few animals won't do any harm -- or will it?
07-23-2007 · EurekAlert!
Sometimes killing even a few individuals can have dramatic consequences, causing populations to fluctuate wildly. The regulation of populations is usually determined by the properties of one specific size class of individuals. When such a crucial size class is the target of mortality, unexpected things may happen. In harvested cannibalistic fish populations, individuals may reach "giant" sizes, more than double the size of those in unharvested population in heavily fished lakes.
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- Study finds mercury prevalent in many western fish
01-23-2007 · EurekAlert!
A new survey by researchers at Oregon State University and the EPA of more than 600 rivers and streams in the western United States found widespread mercury concentrations in fish. Though few of the more than 2,700 fish analyzed in the study contained alarmingly high levels of mercury, the prevalence of the element throughout 12 western states caught the researchers somewhat by surprise.
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- Humboldt squid on the move
07-25-2007 · EurekAlert!
Over the last five years, large, predatory Humboldt squid have 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 tuna and billfish in the Equatorial Pacific. Historically, such large commercial fish preyed on and competed with the Humboldt squid for food.
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- Economists: Reduce fish catch now for bigger net profits later
12-06-2007 · EurekAlert!
In Science magazine this week economists report having demonstrated in four diverse fisheries that highest profits are made when fish stocks are allowed to rise beyond levels traditionally considered optimal. The reason is 'the stock effect': when fish are more plentiful and easier to catch, fishers spend less on fuel and other costs to fill their nets -- profits are higher. The findings could help upend conventional fisheries management thinking.
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- Ceramic Microreactors Developed For On-site Hydrogen Production
10-02-2006 · ScienceDaily
Scientists at the University of Illinois at Urbana-Champaign have designed and built ceramic microreactors for the on-site reforming of hydrocarbon fuels, such as propane, into hydrogen for use in fuel cells and other portable power sources.
Applications include power supplies for small appliances and laptop computers, and on-site rechargers for battery packs used by the military.
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- Illinois-based study of energy crops finds miscanthus more productive than switchgrass
07-10-2007 · EurekAlert!
At the annual meeting of the American Society of Plant Biologists in Chicago (July 7-11, 2007), scientists will present findings on how to economically and efficiently produce plant crops suitable for sustainable bioenergy. Improving the production of such biomass is important because it should significantly ease and eventually replace dependence on petroleum-based fuels. Biomass is plant material, vegetation or agricultural waste used as fuel.
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- UC experts detail new standard for cleaner transportation fuels
08-02-2007 · EurekAlert!
University of California experts today released their much-anticipated blueprint for fighting global warming by reducing the amount of carbon emitted when transportation fuels are used in California. This "Low Carbon Fuel Standard," designed to stimulate improvements in transportation-fuel technologies, is expected to become the foundation for similar initiatives in other states, as well as nationally and internationally.
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- Climate change has surprising effect on endangered naked carp
12-19-2006 · EurekAlert!
Forthcoming in the January/February 2007 issue of Physiological and Biochemical Zoology, a groundbreaking study reveals an unanticipated way freshwater fish may respond to water diversion and climate change. Endangered naked carp migrate annually between freshwater rivers, where they spawn, and a lake in Western China, where they feed and grow. However, Lake Qinghai is drying up and becoming increasingly more saline -- leading to surprising adjustments to the carps' metabolic rate.
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