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Latest Water flea Stories

2012-05-23 17:08:34

Environmental change is the selective force that preserves adaptive traits in organisms and is a primary driver of evolution. However, it is less well known that evolutionary change in organisms also trigger fundamental changes in the environment. Yale University researchers found a prime example of this evolutionary feedback loop in a few lakes in Connecticut, where dams built 300 years ago in Colonial times trapped a fish called the alewife. In a study published May 23 in the journal...

Image 1 - Unexpected Crustacean Diversity In Northern Freshwater Ecosystems
2012-03-04 06:16:02

A new species adds to evidence that subarctic regions with vanishing waters contain unique aquatic animals Freshwater ecosystems in northern regions are home to significantly more species of water fleas than traditionally thought, adding to evidence that regions with vanishing waters contain unique animal life. The new information on water fleas -- which are actually tiny crustaceans -- comes from a multi-year, international study that was published Feb. 24 in the journal Zootaxa....

Loss Of "Lake Lawnmowers" Leads To Algae Blooms
2011-09-29 04:03:29

Unprecedented algae growth in some lakes could be linked to the decline of water calcium levels and the subsequent loss of an important algae-grazing organism that helps keep blooms at bay. Daphnia–also known as water fleas–act like microscopic lawnmowers in lakes, feeding on algae and keeping it in check. However, without sufficient calcium, these water fleas cannot reproduce. “When water calcium levels get low and Daphnia populations decrease in any lake, algal...

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2010-10-13 10:55:20

Some tiny crustaceans living in clear-water alpine ponds high in Washington state's Olympic Mountains have learned how to cope with the sun's damaging ultraviolet rays without sunblock "“ and with very little natural pigmentation to protect them. In fact, in laboratory tests these water fleas, about the size of fruit flies, withstood UV rays much better than the same species of flea taken from a pond less than a mile away, where the water was murkier and thus offered protection. "The...

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2010-05-05 12:25:04

Of all the things that might control the onset of disease epidemics in Michigan lakes, the shape of the lakes' bottoms might seem unlikely. But that is precisely the case, and a new BioScience report by scientists from Indiana University Bloomington and four other institutions explains why. "In the paper, we go through several explanations for what is going on," said IU Bloomington biologist Spencer Hall, the report's lead author. "We are looking at the zooplankton that is infected, the fish...

2007-03-18 09:00:20

By Brad Dokken, Grand Forks Herald, N.D. Mar. 18--Licensed bait dealers can continue trapping emerald shiners on Lake of the Woods and Rainy River, but private trappers will have to stop, now that spiny water fleas have been detected in the Rainy River basin. But it won't be business as usual, officials say. Bait dealers will have to go through training to learn about preventing the spread of spiny water fleas or their eggs. The Minnesota Department of Natural Resources on Monday...

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2005-12-06 17:26:17

BUFFALO, N.Y. -- Male water fleas that scientists have never seen have made their debut in a University at Buffalo laboratory, providing biologists with their first glimpse of these elusive organisms. The UB research, published last month in Proceedings of the Royal Society: Biological Sciences, opens a new window on the biological diversity of several species of water fleas, including those in the genus Daphnia and the genus Bosmina, that play major roles in freshwater food webs. It also...