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Where Do Sharks Go in Hurricanes?

Australia Is Being Ravaged by The Worst-Ever Heatwave, And That Says a Lot

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The unusually warm and dry year in Australia is due, in part, to a weather pattern that has set up across the Indian Ocean. It’s known as the Indian Ocean Dipole, or IOD,

Australia may set a record for its hottest day this week, as temperatures soar past 104 degrees (40 Celsius) in most of the nation’s major cities, with inland areas of Victoria, New South Wales and South Australia possibly eclipsing 122 degrees (50 Celsius). The heat wave, which is unusually severe for so early in the summer, is affecting the entirety of the continent, gradually progressing eastward from Perth to Adelaide and on toward Melbourne and Sydney by Friday.

The heat is sure to aggravate the already record-shattering bush fires, which have emitted massive amounts of greenhouse gases and choked Sydney residents beneath a blanket of smoke. Health authorities in New South Wales are warning them to stay indoors during the day’s heat…

 

Where Do Sharks Go in Hurricanes?

Sharks have been around for 500 million years, so it’s no surprise they’ve learned a few things about survival.

Now scientists are learning that sharks avoid mighty hurricanes by quickly diving for deeper waters.

“When these big storms come through, you have a lot of wind, a lot of waves—a real chaotic environment,” says Grace Casselberry, a doctoral candidate in marine science at the University of Massachusetts Amherst. “We think they’re moving out to these deeper areas to take shelter from the storm.”

Casselberry says luck was on her side when she made this discovery. She and her colleagues were tracking tiger, lemon, nurse, and Caribbean reef sharks in the Buck Island Reef National Monument, a seagrass- and sand-filled lagoon protected by a coral reef off northeast Saint Croix in the US Virgin Islands, as part of a larger study on shark behavior in the area. They’d attached transponders to the sharks that sent signals to receivers about the size of Pringles cans that were anchored to the seafloor….

 

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This entry was posted on 19/12/2019 by in Uncategorized.

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