Sunday, August 15, 2010

Boiling our oceans and killing our fish

But remember... there is no global warming! (my bold)
VILLAS, N.J. - The removal of thousands of dead fish from eight miles of Delaware Bay shoreline is expected to begin Friday after a determination that low oxygen levels in the water likely caused the massive kill.

Water samples taken Thursday "strongly suggest" that extraordinarily low levels of dissolved oxygen - the result of higher air and water temperatures - killed the menhaden, according to state Department of Environmental Protection officials.

The lowest oxygen reading was recorded at Pierces Point, one of the areas hardest hit by the fish kill. Bay water at the time the fish washed ashore was around 85 degrees, approximately 10 degrees above normal for this time of the year.


The warmer water is, the less dissolved oxygen it can hold, Van Fossen said. At night, oxygen levels also may drop significantly because aquatic plants near the water's edge stop their process of photosynthesis.

"If the fish schooled very tightly in shallows . . . they may have simply used up all the oxygen that was available to them," he said.

An early theory of investigators was that predators had driven the menhaden toward shore and in nearby creeks, where they quickly depleted the dissolved oxygen.

Menhaden, which measure from 31/2 inches to 4 inches, are bony fish not usually consumed by humans. They are prey for species such as bluefish, drum, flounder, mackerel, striped bass, and tuna.
Oceans, we should be taking better care of you....

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